{"id":451,"date":"2026-05-28T07:37:15","date_gmt":"2026-05-28T14:37:15","guid":{"rendered":"https:\/\/scienceblog.com\/sciencechina\/?p=451"},"modified":"2026-05-28T07:37:15","modified_gmt":"2026-05-28T14:37:15","slug":"dirty-water-is-now-generating-electricity-and-cleaning-itself","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/","title":{"rendered":"Dirty Water Is Now Generating Electricity and Cleaning Itself"},"content":{"rendered":"

A droplet of treated wastewater falls thirty centimetres and strikes a thin plastic film. The impact lasts a fraction of a second. Fifteen LEDs flash on. This happens, over and over, inside a modest laboratory at Lanzhou Jiaotong University, where researchers have built a generator that runs entirely on the kinetic energy of falling sewage, and uses the electricity it produces to clean more sewage. It’s a closed loop that shouldn’t work, except that it does, and the numbers are starting to look serious enough that wastewater engineers probably should pay attention.<\/p>\n

The city of Lanzhou, a sprawling industrial hub straddling the Yellow River in northwestern China, discharges roughly 540,000 tonnes of municipal wastewater every single day. That’s an almost unimaginable volume of water, and virtually all of the mechanical energy it contains when it flows out of treatment plants is just… lost. Spilled into rivers. Gone.<\/p>\n

The device at the heart of this research belongs to a class of technology called triboelectric nanogenerators, or TENGs. These exploit a phenomenon you’ve probably experienced without thinking much about it: when certain materials come into contact and then separate, electrons jump between them, generating a charge. Rub a balloon against your hair, and you’ve run a triboelectric generator of sorts (a very poor one, but still). The Lanzhou team’s version is rather more refined: a glass slide coated with indium tin oxide, topped with a thin film of perfluoroethylenepropylene copolymer, a hydrophobic fluoropolymer related to Teflon. When a droplet lands on the film, spreads, touches a small aluminum electrode, then retracts, the charge that accumulated at the liquid-solid interface is released through an external circuit. It happens in milliseconds. The droplet bounces away carrying almost none of the energy it brought in.<\/p>\n

Getting the film material right turned out to matter enormously. The team tested three candidates, and the differences were striking. A polypropylene film produced barely any voltage at all, 0.47 volts under test conditions. The Teflon-adjacent FEP film produced 90 volts using deionized water. The reason, roughly, is hydrophobicity: the more a surface repels water, the more completely a droplet bounces, and the more efficiently energy transfers into the circuit. But deionized water is not what comes out of a municipal sewage plant.<\/p>\n

Secondary effluent, the water that exits treatment after biological processing, contains dissolved ions that impede electron transfer at the solid-liquid boundary. The messier the water, the lower the output. But here’s where things get interesting: once treated water meets China’s Grade I-A discharge standard (which caps chemical oxygen demand below 50 milligrams per litre, ammonia nitrogen below 5 mg\/L, and so on), further refinements in treatment method don’t much matter. The researchers ran the same generator on effluent from three different biological treatment processes and found statistically insignificant differences in voltage and current. It’s the water quality that counts, not how you got there.<\/p>\n

“We fabricated several DEG devices using commercially available hydrophobic films, including perfluoroethylenepropylene copolymer (FEP), polytetrafluoroethylene, and polypropylene and investigated the effects of the droplets from various solutions on the output performance of DEGs,” says Dr. Beidou Xi of Lanzhou Jiaotong University, who led the work. The resulting device, operating with Grade I-A effluent, achieves a maximum output voltage of 22.47 volts, a current of 2.11 microamps, and a peak power output of 15.18 microwatts.<\/p>\n

Those numbers require some context, because 15 microwatts sounds essentially useless if you’re imagining running a city. A single device is tiny, its output fleeting, and intermittent (it only generates during the droplet’s contact phase, which is why the team needed rectification circuits and capacitors to turn the pulsed AC into something steady enough to drive a continuous load). What the researchers did was connect six devices in parallel, feed their combined output through a rectifier into a small capacitor, and use the stored charge to light an LED continuously without any external power supply. A wastewater-powered lamp. Permanently on. Fed entirely by the water that used to be flushing past and wasting its energy into the river.<\/p>\n

The more consequential application, though, is what happens when you run the harvested electricity back into the water itself. The team submerged stainless steel electrodes in a beaker of raw municipal wastewater, connected them to the DEG system, and watched. Small bubbles appeared at the electrode surfaces, a tell-tale sign of electrolysis. Those bubbles aren’t just a visual curiosity: they adhere to suspended particles and drag them to the water surface in a process called electro-flotation, achieving a sort of self-sorting that helps separate pollutants from the liquid. After two hours of DEG-powered electrolysis, ammonia nitrogen concentrations fell by roughly 12 percent and chemical oxygen demand by about 40 percent. No plug socket involved. The system was, in a real sense, using wastewater to treat wastewater. The alternating current produced by the unpaired DEGs (before rectification) also helped prevent mineral scale from building up on the electrodes, which is a chronic problem in conventional electrochemical treatment and usually requires periodic shutdown and cleaning.<\/p>\n

Scale buildup is, in fact, one of the places the system shows its vulnerability. Over 140 days of continuous monitoring, the team found that FEP film gradually accumulated deposits that reduced droplet contact and cut voltage output substantially. On day 122, they cleaned the film with deionized water and dried it; performance recovered promptly. Whether automated self-cleaning could be engineered into a full-scale installation, and at what cost, is a question the paper doesn’t fully address.<\/p>\n

The dye degradation experiments take the concept furthest. Methyl orange, a synthetic azo dye used as a model industrial pollutant, was placed in a flask connected to a six-device DEG system, with no external power, and left to run. After about 42 hours the colour had shifted from bright orange to a pale yellow. After 54 hours the decolorization rate reached 96 percent and the chemical oxygen demand had fallen by 91 percent. The dye’s azo bonds and aromatic ring structures were systematically broken down by electrochemical reactions driven entirely by falling treated wastewater. The team speculates the process first cleaves the nitrogen-nitrogen double bond that gives methyl orange its colour, then attacks the benzene rings, eventually mineralising the molecule to carbon dioxide and water.<\/p>\n

“Our study demonstrates the application of TENG technology in energy harvesting from secondary effluents and introduces a novel approach to wastewater resource recovery, carbon reduction, and sustainable management,” says Dr. Xi. For a municipal plant processing 100,000 tonnes a day, his team’s calculations put the theoretical peak power at roughly 10 megawatts, enough to meaningfully offset the substantial electricity costs that make wastewater treatment one of the more energy-hungry municipal services. Whether the engineering scales without the economics falling apart is, of course, the next question entirely.<\/p>\n

https:\/\/doi.org\/10.1016\/j.jes.2025.05.020<\/a><\/p>\n

\n

Frequently Asked Questions<\/h2>\n

Could wastewater treatment plants realistically power themselves using this technology?<\/strong><\/p>\n

Not entirely, at least not yet. The researchers estimate that a large municipal plant handling 100,000 tonnes of effluent per day could theoretically generate around 10 megawatts using scaled-up droplet generator arrays, which would offset a meaningful portion of operating costs. Whether the infrastructure required to capture that energy could be built economically is a separate challenge that the research hasn’t addressed, but the energy potential in discharged wastewater is genuinely large and mostly untapped.<\/p>\n

Why does cleaner water actually generate more electricity in this system?<\/strong><\/p>\n

It’s counterintuitive, but the key is dissolved ions. When water contains high concentrations of salts and organic compounds, those ions interfere with electron transfer at the film surface, reducing the electrical charge generated by each falling droplet. Treated wastewater has far fewer dissolved solids than raw sewage, which is why meeting the Grade I-A discharge standard is essentially the threshold at which the system becomes useful. Deionized water performs best of all, producing voltages four times higher than treated effluent.<\/p>\n

What is a triboelectric nanogenerator and why is it useful for harvesting energy from water?<\/strong><\/p>\n

Triboelectric generators work by exploiting the charge that builds up when certain materials come into contact and separate, the same basic physics that makes a balloon stick to a wall after you rub it. At the nanoscale, these devices can harvest energy from very small, irregular movements, making them well-suited for capturing the low-frequency, low-power energy in things like raindrops, waves, or in this case, falling wastewater droplets that would otherwise be ignored by conventional turbines or generators.<\/p>\n

Is the electrode fouling problem a serious obstacle to real-world use?<\/strong><\/p>\n

It’s a legitimate limitation. The study found that mineral deposits gradually built up on the hydrophobic film and aluminum electrodes over time, cutting output substantially until the surfaces were cleaned. In laboratory conditions this was resolved with a simple deionized water rinse, but scaling that maintenance to an industrial system running continuously across many devices would require either automated cleaning cycles or new materials that resist fouling. The research doesn’t yet answer whether that’s straightforward engineering or a genuinely hard problem.<\/p>\n","protected":false},"excerpt":{"rendered":"

A droplet of treated wastewater falls thirty centimetres and strikes a thin plastic film. The impact lasts a fraction of a second. Fifteen LEDs flash on. This happens, over and over, inside a modest laboratory at Lanzhou Jiaotong University, where researchers have built a generator that runs entirely on the kinetic energy of falling sewage, … Read more<\/a><\/p>\n","protected":false},"author":1299,"featured_media":452,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false,"_links_to":"","_links_to_target":""},"categories":[4,2],"tags":[],"class_list":["post-451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment","category-technology","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"\nDirty Water Is Now Generating Electricity and Cleaning Itself - SciChi<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dirty Water Is Now Generating Electricity and Cleaning Itself\" \/>\n<meta property=\"og:description\" content=\"A droplet of treated wastewater falls thirty centimetres and strikes a thin plastic film. The impact lasts a fraction of a second. Fifteen LEDs flash on. This happens, over and over, inside a modest laboratory at Lanzhou Jiaotong University, where researchers have built a generator that runs entirely on the kinetic energy of falling sewage, ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/\" \/>\n<meta property=\"og:site_name\" content=\"SciChi\" \/>\n<meta property=\"article:published_time\" content=\"2026-05-28T14:37:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"524\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"SciChi\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"SciChi\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/\"},\"author\":{\"name\":\"SciChi\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#\\\/schema\\\/person\\\/9974872362fae8e6096bd8c6637cf082\"},\"headline\":\"Dirty Water Is Now Generating Electricity and Cleaning Itself\",\"datePublished\":\"2026-05-28T14:37:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/\"},\"wordCount\":1499,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/wp-content\\\/uploads\\\/sites\\\/16\\\/2026\\\/05\\\/droplet-based-electricity-generator-system.jpg\",\"articleSection\":[\"Environment\",\"Technology\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/\",\"url\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/\",\"name\":\"Dirty Water Is Now Generating Electricity and Cleaning Itself - SciChi\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/wp-content\\\/uploads\\\/sites\\\/16\\\/2026\\\/05\\\/droplet-based-electricity-generator-system.jpg\",\"datePublished\":\"2026-05-28T14:37:15+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#primaryimage\",\"url\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/wp-content\\\/uploads\\\/sites\\\/16\\\/2026\\\/05\\\/droplet-based-electricity-generator-system.jpg\",\"contentUrl\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/wp-content\\\/uploads\\\/sites\\\/16\\\/2026\\\/05\\\/droplet-based-electricity-generator-system.jpg\",\"width\":700,\"height\":524,\"caption\":\"Researchers develop a droplet-based electricity generator system capable of converting treated municipal wastewater into usable electrical energy for pollutant removal and electrocatalytic degradation applications.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/2026\\\/05\\\/28\\\/dirty-water-is-now-generating-electricity-and-cleaning-itself\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Dirty Water Is Now Generating Electricity and Cleaning Itself\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#website\",\"url\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/\",\"name\":\"SciChi\",\"description\":\"Tracking Chinese Research\",\"publisher\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#organization\",\"name\":\"SciChi\",\"url\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/wp-content\\\/uploads\\\/sites\\\/16\\\/2025\\\/04\\\/scichi-logo-cropped.jpg\",\"contentUrl\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/wp-content\\\/uploads\\\/sites\\\/16\\\/2025\\\/04\\\/scichi-logo-cropped.jpg\",\"width\":796,\"height\":296,\"caption\":\"SciChi\"},\"image\":{\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/#\\\/schema\\\/person\\\/9974872362fae8e6096bd8c6637cf082\",\"name\":\"SciChi\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/45bfcb06f83fff507782e1030e14a31f738fce0220fc6a8fea863d633e61311f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/45bfcb06f83fff507782e1030e14a31f738fce0220fc6a8fea863d633e61311f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/45bfcb06f83fff507782e1030e14a31f738fce0220fc6a8fea863d633e61311f?s=96&d=mm&r=g\",\"caption\":\"SciChi\"},\"url\":\"https:\\\/\\\/scienceblog.com\\\/sciencechina\\\/author\\\/chinaresearch\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Dirty Water Is Now Generating Electricity and Cleaning Itself - SciChi","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/","og_locale":"en_US","og_type":"article","og_title":"Dirty Water Is Now Generating Electricity and Cleaning Itself","og_description":"A droplet of treated wastewater falls thirty centimetres and strikes a thin plastic film. The impact lasts a fraction of a second. Fifteen LEDs flash on. This happens, over and over, inside a modest laboratory at Lanzhou Jiaotong University, where researchers have built a generator that runs entirely on the kinetic energy of falling sewage, ... Read more","og_url":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/","og_site_name":"SciChi","article_published_time":"2026-05-28T14:37:15+00:00","og_image":[{"width":700,"height":524,"url":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg","type":"image\/jpeg"}],"author":"SciChi","twitter_card":"summary_large_image","twitter_misc":{"Written by":"SciChi","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#article","isPartOf":{"@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/"},"author":{"name":"SciChi","@id":"https:\/\/scienceblog.com\/sciencechina\/#\/schema\/person\/9974872362fae8e6096bd8c6637cf082"},"headline":"Dirty Water Is Now Generating Electricity and Cleaning Itself","datePublished":"2026-05-28T14:37:15+00:00","mainEntityOfPage":{"@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/"},"wordCount":1499,"commentCount":0,"publisher":{"@id":"https:\/\/scienceblog.com\/sciencechina\/#organization"},"image":{"@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#primaryimage"},"thumbnailUrl":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg","articleSection":["Environment","Technology"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#respond"]}],"copyrightYear":"2026","copyrightHolder":{"@id":"https:\/\/scienceblog.com\/#organization"}},{"@type":"WebPage","@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/","url":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/","name":"Dirty Water Is Now Generating Electricity and Cleaning Itself - SciChi","isPartOf":{"@id":"https:\/\/scienceblog.com\/sciencechina\/#website"},"primaryImageOfPage":{"@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#primaryimage"},"image":{"@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#primaryimage"},"thumbnailUrl":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg","datePublished":"2026-05-28T14:37:15+00:00","breadcrumb":{"@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#primaryimage","url":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg","contentUrl":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg","width":700,"height":524,"caption":"Researchers develop a droplet-based electricity generator system capable of converting treated municipal wastewater into usable electrical energy for pollutant removal and electrocatalytic degradation applications."},{"@type":"BreadcrumbList","@id":"https:\/\/scienceblog.com\/sciencechina\/2026\/05\/28\/dirty-water-is-now-generating-electricity-and-cleaning-itself\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/scienceblog.com\/sciencechina\/"},{"@type":"ListItem","position":2,"name":"Dirty Water Is Now Generating Electricity and Cleaning Itself"}]},{"@type":"WebSite","@id":"https:\/\/scienceblog.com\/sciencechina\/#website","url":"https:\/\/scienceblog.com\/sciencechina\/","name":"SciChi","description":"Tracking Chinese Research","publisher":{"@id":"https:\/\/scienceblog.com\/sciencechina\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/scienceblog.com\/sciencechina\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/scienceblog.com\/sciencechina\/#organization","name":"SciChi","url":"https:\/\/scienceblog.com\/sciencechina\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/scienceblog.com\/sciencechina\/#\/schema\/logo\/image\/","url":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/04\/scichi-logo-cropped.jpg","contentUrl":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/04\/scichi-logo-cropped.jpg","width":796,"height":296,"caption":"SciChi"},"image":{"@id":"https:\/\/scienceblog.com\/sciencechina\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/scienceblog.com\/sciencechina\/#\/schema\/person\/9974872362fae8e6096bd8c6637cf082","name":"SciChi","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/45bfcb06f83fff507782e1030e14a31f738fce0220fc6a8fea863d633e61311f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/45bfcb06f83fff507782e1030e14a31f738fce0220fc6a8fea863d633e61311f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/45bfcb06f83fff507782e1030e14a31f738fce0220fc6a8fea863d633e61311f?s=96&d=mm&r=g","caption":"SciChi"},"url":"https:\/\/scienceblog.com\/sciencechina\/author\/chinaresearch\/"}]}},"jetpack_featured_media_url":"https:\/\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/05\/droplet-based-electricity-generator-system.jpg","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":231,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/08\/04\/from-sewers-to-evs-wastewater-sludge-powers-battery-revolution\/","url_meta":{"origin":451,"position":0},"title":"From Sewers to EVs, Wastewater Sludge Powers Battery Revolution","author":"SciChi","date":"August 4, 2025","format":false,"excerpt":"A research team in Shenzhen has found a surprising new energy source hiding in our city sewage. By recovering phosphorus from municipal wastewater, the team has developed a cleaner, cheaper, and more sustainable way to manufacture lithium iron phosphate (LiFePO4) batteries, crucial components in electric vehicles and grid-scale energy storage\u2026","rel":"","context":"In "Environment"","block_context":{"text":"Environment","link":"https:\/\/scienceblog.com\/sciencechina\/category\/environment\/"},"img":{"alt_text":"graphical abstract of sludge to phosphorous process","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/1-s2.0-S2095809924003205-ga1_lrg.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/1-s2.0-S2095809924003205-ga1_lrg.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/1-s2.0-S2095809924003205-ga1_lrg.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/08\/1-s2.0-S2095809924003205-ga1_lrg.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":303,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/11\/23\/when-water-becomes-a-battery-flexible-skin-patch-pulls-power-from-thin-air\/","url_meta":{"origin":451,"position":1},"title":"When Water Becomes A Battery: Flexible Skin Patch Pulls Power From Thin Air","author":"SciChi","date":"November 23, 2025","format":false,"excerpt":"Imagine a bandage-like strip on your skin quietly turning humidity, breath and body heat into electricity for your devices. In a new study in the journal Wearable Electronics, a team led by researchers at Nanjing University reports a flexible evaporation-induced generator that uses a carefully engineered \u201cwater-ion-temperature\u201d gradient to reach\u2026","rel":"","context":"In "Technology"","block_context":{"text":"Technology","link":"https:\/\/scienceblog.com\/sciencechina\/category\/technology\/"},"img":{"alt_text":"A flexible EIG generates electricity through coupled mass, charge, and heat transfer, making it well suited for wearable devices.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/11\/generator.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/11\/generator.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/11\/generator.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/11\/generator.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":426,"url":"https:\/\/scienceblog.com\/sciencechina\/2026\/04\/09\/the-single-device-that-can-both-generate-and-store-clean-energy\/","url_meta":{"origin":451,"position":2},"title":"The Single Device That Can Both Generate and Store Clean Energy","author":"SciChi","date":"April 9, 2026","format":false,"excerpt":"Key Takeaways Solid oxide cells can generate electricity or produce hydrogen, offering versatility for clean energy transitions. A new review links solid oxide fuel cells and electrolysis cells, emphasizing a unified approach in research and application. Key challenges include high operating temperatures and material degradation, which hinder commercialization and reliability.\u2026","rel":"","context":"In "Environment"","block_context":{"text":"Environment","link":"https:\/\/scienceblog.com\/sciencechina\/category\/environment\/"},"img":{"alt_text":"Whole-chain framework of solid oxide fuel and electrolysis cells.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/solid-oxide-fuel.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/solid-oxide-fuel.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/solid-oxide-fuel.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2026\/04\/solid-oxide-fuel.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":154,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/05\/09\/innovative-water-activated-face-mask-enhances-skincare-with-built-in-power\/","url_meta":{"origin":451,"position":3},"title":"Innovative Water-Activated Face Mask Enhances Skincare with Built-in Power","author":"SciChi","date":"May 9, 2025","format":false,"excerpt":"A self-powered face mask that activates with just a splash of water could transform at-home skincare by significantly improving how treatments penetrate the skin. Researchers at Qingdao University have developed a wearable iontophoresis mask that creates its own gentle microcurrent to drive skincare ingredients deeper into the skin, potentially doubling\u2026","rel":"","context":"In "Health"","block_context":{"text":"Health","link":"https:\/\/scienceblog.com\/sciencechina\/category\/health\/"},"img":{"alt_text":"Fig. 1. Structural design and working mechanism of the self-powered iontophoresis mask. (A) Schematic of the self-powered iontophoresis mask. (B) Enhancement of drug penetration with mask use. (C) Comparison of drug penetration areas before and after mask application. (D) Gelation process of superabsorbent fibers (SAFs). Zn-SF: zinc-modified silver fiber anode; MnO\u2082-Ti: manganese dioxide\u2013modified titanium wire cathode.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/face-mask-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/face-mask-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/face-mask-.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":280,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/10\/17\/contact-lenses-that-monitor-your-health-while-you-blink\/","url_meta":{"origin":451,"position":4},"title":"Contact Lenses That Monitor Your Health While You Blink","author":"ScienceBlog.com","date":"October 17, 2025","format":false,"excerpt":"Scientists have developed contact lenses that do far more than correct vision. These experimental devices can track eye pressure, detect glucose levels in tears, kill bacteria on contact, and even deliver heat therapy directly to the eye. The secret ingredient: a class of two-dimensional materials called MXenes, which are essentially\u2026","rel":"","context":"In "Brain & Behavior"","block_context":{"text":"Brain & Behavior","link":"https:\/\/scienceblog.com\/sciencechina\/category\/brain-behavior\/"},"img":{"alt_text":"MXene-based smart contact lenses can track eye health, deliver treatments, and keep the eyes comfortable. Transparent MXene films add features like infection protection, moisture control, and light-based therapy, though challenges remain in making them stable and widely usable.","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/10\/mxene-smart-contact-lens-infographic.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/10\/mxene-smart-contact-lens-infographic.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/10\/mxene-smart-contact-lens-infographic.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/10\/mxene-smart-contact-lens-infographic.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":165,"url":"https:\/\/scienceblog.com\/sciencechina\/2025\/05\/21\/new-molecular-glue-pushes-perovskite-solar-cells-closer-to-commercial-reality\/","url_meta":{"origin":451,"position":5},"title":"New ‘Molecular Glue’ Pushes Perovskite Solar Cells Closer to Commercial Reality","author":"SciChi","date":"May 21, 2025","format":false,"excerpt":"A simple industrial chemical acting as molecular \"superglue\" has helped Chinese researchers achieve record-breaking efficiency in large-scale, printable solar panels. The innovation addresses one of the final hurdles blocking perovskite solar technology from moving out of labs and onto rooftops worldwide. Scientists from the Dalian Institute of Chemical Physics have\u2026","rel":"","context":"In "Environment"","block_context":{"text":"Environment","link":"https:\/\/scienceblog.com\/sciencechina\/category\/environment\/"},"img":{"alt_text":"ambient all-bladed perovskite solar cells","src":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/ambient-all-bladed-perovskite-solar-cells.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/ambient-all-bladed-perovskite-solar-cells.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/ambient-all-bladed-perovskite-solar-cells.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/scienceblog.com\/sciencechina\/wp-content\/uploads\/sites\/16\/2025\/05\/ambient-all-bladed-perovskite-solar-cells.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts\/451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/users\/1299"}],"replies":[{"embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/comments?post=451"}],"version-history":[{"count":1,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts\/451\/revisions"}],"predecessor-version":[{"id":453,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/posts\/451\/revisions\/453"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/media\/452"}],"wp:attachment":[{"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/media?parent=451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/categories?post=451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scienceblog.com\/sciencechina\/wp-json\/wp\/v2\/tags?post=451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}