Wastewater nutrient recovery in 2026: overview
Wastewater nutrient recovery captures nitrogen and phosphorus from sewage, sludge and related waste streams so they can be reused, often as fertilizer feedstocks. It can reduce nutrient discharges while returning finite resources to productive use. The technical challenge is to recover nutrients in a usable product form without adding excessive energy, chemicals or treatment complexity. Feed composition, competing ions and contaminants can all affect product quality and process economics.
Recent work is broadening the product and process options. In September 2026, researchers at Harbin Institute of Technology and Tsinghua University investigated in-situ anodic precipitation of battery-grade iron phosphate, while Western University reported electrochemical struvite precipitation to recover nitrogen and phosphorus together. In October 2026, a study from Tongji University examined converting sewage-sludge ash into FePO4, and QILEE unveiled a containerized PTFE membrane ammonia-stripping system. These developments point toward selective recovery, product upgrading and systems designed for practical deployment.
- 1Beyond fertilizer: Research is extending recovered phosphorus into materials such as battery-grade iron phosphate, creating a higher-value route alongside fertilizer products.
- 2Selective recovery: Electrochemical and adsorption-based methods aim to separate target nutrients from complex wastewater matrices, but competing ions and product purification remain key constraints.
- 3From trials to plants: Containerized ammonia stripping and pilot-scale treatment work show a shift toward integrating recovery equipment into real wastewater operations.
Top organizations working on wastewater nutrient recovery
Ranked by Linknovate activity score · last 24 monthsThe activity score adds up the relevance of every patent, publication, grant and news item linking an organization to wastewater nutrient recovery. Showing 7 of 2,517 organizations.
| # | Organization | Approach | Signals (24 mo) | Momentum | Why it matters |
|---|---|---|---|---|---|
| 1 | 
Chinese Academy of Sciences CAS
Research · China |
Sorption and ion exchange | PUB 231 · NEWS 9 | +20% | Researchers have studied modified biochar for recovering nutrients from source-separated urine, including how chlorine affects nutrient adsorption. Their work also explores electrochemical struvite recovery from phosphorus-rich wastewater. |
| 2 | 
Harbin Institute of Technology
Research · China |
Electrochemical recovery | PUB 147 · NEWS 35 | +125% | Recently, researchers investigated recovering wastewater phosphorus as battery-grade iron phosphate through in-situ anodic precipitation in an electro-driven membrane system. Other work examines phosphorus recovery from sludge and ammonia recovery from sludge lysate. |
| 3 | 
University of Chinese Academy of Sciences
Research · China |
Electrochemical recovery | PUB 137 · NEWS 1 | -6% | Researchers have developed magnesium–air fuel-cell approaches to recover phosphorus from source-separated urine as struvite, including a stirred-tank reactor and a method combining the fuel cell with modified attapulgite. |
| 4 | 
Beijing University of Technology
Research · China |
Precipitation and crystallization | PAT 1 · PUB 115 NEWS 5 |
+37% | Recently, researchers reported a calcium-driven biomineralization process that combines nitrogen removal with hydroxyapatite formation in low-strength wastewater. They also investigate biological nitrification for recovering nutrients from source-separated urine. |
| 5 | 
Tsinghua University
Research · China |
Electrochemical recovery | PUB 119 · NEWS 15 | -3% | Recently, researchers investigated recovering wastewater phosphorus as battery-grade iron phosphate using in-situ anodic precipitation in an electro-driven membrane system. Other work studies microbial precipitation of vivianite and struvite for phosphorus recovery. |
| 6 | 
Xi'an University of Architecture and Technology
Research · China |
Precipitation and crystallization | PUB 112 · NEWS 1 | +13% | Researchers have tested pilot-scale struvite recovery from agricultural wastewater and studied bioinduced phosphorus precipitation as hydroxyapatite. Recent work also explores magnetic biochar to aid vivianite separation. |
| 7 | 
Tianjin University
Research · China |
Sorption and ion exchange | PAT 1 · PUB 85 | +61% | Researchers have investigated CO₂-driven ion exchange to recover ammonium from source-separated urine and bioelectrically assisted membrane systems for nutrient recovery. Recent work also examines ammonia recovery from sludge lysate using microbial electrochemical processes. |
| 8 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
| 9 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
| 10 | ··Hidden organizationCompany | Approach | PAT 00 · PUB 00 GRANTS 0 · NEWS 00 | +00% | Available to registered users. |
Startups to watch and leading research centers
Startups to watch 17 total
Noah Water Solutions bvbaBelgiumThe organization is associated with sanitation and water treatment. Related work examines resource-recovery opportunities from train vacuum-toilet blackwater and treatment of faecal sludge.- ··Hidden startupCountryAvailable to registered users, with funding and founding year.
- ··Hidden startupCountryAvailable to registered users, with funding and founding year.
Leading research institutions 2,107 total
- Chinese Academy of Sciences CASChinaResearchers have studied modified biochar for recovering nutrients from source-separated urine, including how chlorine affects nutrient adsorption. Their work also explores electrochemical struvite recovery from phosphorus-rich wastewater.
- Harbin Institute of TechnologyChinaRecently, researchers investigated recovering wastewater phosphorus as battery-grade iron phosphate through in-situ anodic precipitation in an electro-driven membrane system. Other work examines phosphorus recovery from sludge and ammonia recovery from sludge lysate.
- University of Chinese Academy of SciencesChinaResearchers have developed magnesium–air fuel-cell approaches to recover phosphorus from source-separated urine as struvite, including a stirred-tank reactor and a method combining the fuel cell with modified attapulgite.
- ··Hidden research institutionCountryAvailable to registered users, with their key researchers.
- ··Hidden research institutionCountryAvailable to registered users, with their key researchers.
Where wastewater nutrient recovery innovation happens
Share of documents with at least one organization from each country.
Open the interactive map with all 2,517 organizationsMain technical approaches
Last 24 months| Approach | What it is | Documents | Leading organizations |
|---|---|---|---|
| Precipitation and crystallization | Converts dissolved nutrients into solid products such as struvite or hydroxyapatite; performance depends on feed chemistry and controlling unwanted precipitation. | 589 |
Georgia Institute of Technology, Frontiers Of Environmental Science & Engineering, New Jersey Institute of Technology |
| Ammonia stripping and capture | Transfers ammonia from wastewater into a capture medium; it can recover concentrated nitrogen, but needs pH or heat management and downstream capture. | 244 |
Polytechnic University of Valencia, University of Chinese Academy of Sciences, Chinese Academy of Sciences CAS |
| Sorption and ion exchange | Uses selective media to bind nutrients for later recovery; material regeneration and interference from competing ions can limit performance. | 2,538 |
Chinese Academy of Sciences CAS, Harbin Institute of Technology, Tianjin University |
| Biological assimilation | Uses microorganisms or algae to incorporate nutrients into biomass; it can combine treatment and recovery, but biomass harvesting and product consistency are challenges. | 972 |
Harbin Institute of Technology, Beijing University of Technology, 12579Southeast University |
| Thermochemical and ash processing | Extracts or transforms nutrients in sludge and ash using heat and chemical treatment; it can access concentrated phosphorus but may require substantial energy and purification. | 170 |
Polytechnic University of Milan, University of Brescia, Northeastern University |
| Electrochemical recovery | Uses applied electrical or electrochemical processes to separate or precipitate nutrients; it can support selective recovery, but energy use and electrode durability matter. | 596 |
Joanna Briggs Institute, RPTU Kaiserslautern Landau, Space Research Corporation |
Emerging trends
Last 12 months vs previous 36 monthsTerms whose frequency in the last 12 months grew the most compared with the previous 36 months.
Funding and investment
Recent funding rounds
Recorded grant funding totals $257,587,174 across 140 grants since 2020. The funding-round entries are reported separately from this grant total.
Patent landscape
Top patent holders · last 24 monthsRecent developments
Latest news, duplicates removed- Oct 2026Newswise — Farmers rely on potassium to support plant growth, water regulation, and crop resilience. Today, most agricultural potassium comes from mined potash, whose extraction can generate saline waste and damage…Newswise: SciNews
- Oct 2026QILEE Unveils Containerized PTFE Membrane Ammonia Stripping System for High-Strength Wastewater Resource Recovery  StreetInsiderWater Treatment News
- Sep 2026Extreme temperatures, droughts and wildfires lead to water scarcity and the search for alternative sources of water to secure supplies. With increasing pressures from climate change, Europe’s water stress – not having…English – The Conversation
- Sep 2026Since the end of the second world war, adding phosphorus to soils in the form of mineral fertiliser has played a crucial role in increasing and maintaining global food production in response to population growth.…English – The Conversation
- Month 20XXHidden developmentAvailable to registered users with alerts enabled.
Frequently asked questions about wastewater nutrient recovery
What companies are working on wastewater nutrient recovery?
Named commercial activity includes QILEE, Clean TeQ Water, Enpure, EasyMining and EPS Water. In October 2026, QILEE unveiled a containerized PTFE membrane ammonia-stripping system, and Clean TeQ Water and Enpure announced a partnership to bring PHOSPHIX phosphorus removal to UK utilities. EasyMining and EPS Water announced nitrogen-recovery collaboration plans in February 2026.
Which universities and research centers lead wastewater nutrient recovery research?
Chinese Academy of Sciences CAS, Harbin Institute of Technology and the University of Chinese Academy of Sciences are prominent research organizations, with 240, 182 and 138 documents respectively in the 24-month window. Their work includes biochar adsorption, electrochemical recovery and struvite production. These figures indicate research activity, not a ranking of technical performance.
How much funding has wastewater nutrient recovery received?
The recorded grant total is $257,587,174 across 140 grants since 2020. This is the grant funding figure reported for the field; it is distinct from the separately reported funding-round total. The available figures do not identify how much of the funding went to specific recovery methods, organizations or commercial projects.
Who holds the most wastewater nutrient recovery patents?
Guangdong Brunp Recycling Technology Co. and Hunan Brunp Recycling Technology Co. lead the listed patent holders, with 9 patents each. LG Corp follows with 5, while Ecolab and Stamicarbon BV have 4 each. These counts identify holders in the patent-holder data and do not indicate patent quality or commercial deployment.
Is wastewater nutrient recovery patent activity growing?
Patent activity declined by 44.5% in the 24-month window, while publications in the latest year grew by 4.3%. The contrasting trends suggest that research output is continuing to rise even as patenting slows. The figures describe overall activity, not the trajectory of each individual recovery approach.
What are the latest developments in wastewater nutrient recovery?
Recent developments include iron-phosphate recovery from sewage-sludge ash and electrochemical struvite precipitation. In October 2026, Tongji University reported a matrix-guided route to FePO4 for battery materials; in September 2026, Western University studied simultaneous nitrogen and phosphorus recovery as struvite. QILEE also unveiled a containerized ammonia-stripping system in October 2026.
What are the main approaches in wastewater nutrient recovery and how do they differ?
The main approaches are precipitation and crystallization, ammonia stripping and capture, sorption and ion exchange, biological assimilation, thermochemical and ash processing, and electrochemical recovery. They differ in how they separate nutrients and what form they produce. Precipitation makes solids, stripping captures ammonia, and biological methods incorporate nutrients into biomass; each faces different feed-quality, energy or product-separation constraints.
Which countries lead wastewater nutrient recovery?
China leads the country data with 13,152 documents, followed by the United States with 11,422 and the United Kingdom with 3,407. India and Germany follow with 3,189 and 2,750 documents. These counts measure recorded activity, not the share of deployed facilities or recovered nutrient volumes.
What are the applications of wastewater nutrient recovery?
The listed applications include municipal treatment plants, livestock manure and digestate, food and beverage processing, source-separated urine and recovered fertilizer products. Municipal treatment plants have 1,935 documents, while food and beverage processing has 490. The methods can recover nutrients from concentrated side streams as well as wastewater, with the suitable process depending on the feedstock.