Struvite Reactor Tank


The Struvite Reactor Tank converts urine into fertilizer.

Product description Brand name and product description

The Eawag low-cost struvite reactor tank is a tool to produce struvite powder from urine. Struvite contains nutrients such as phosphorus necessary for plant growth. The goal of this product is to improve crop production in low-income communities and improve resource reuse. Phosphorus is becoming scarce and it is hence increasingly important to find new phosphorus sources. Urine is available wherever there are humans and by constructing a struvite reactor tank and selling/using struvite on farmland, individuals can improve their economic situation while also potentially simplifying waste management since it is easier to handle and make use of urine and faeces separately than when mixed.

Target region(s) Target region for distribution/implementation (listed by country if specified)

Tanks to produce struvite from urine can be advanced and have different designs but this low-cost version is targeted towards the global south with implementation so far in Nepal and South Africa.

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

Eawag has had projects related to spreading knowledge about this method of nutrient recovery in both Nepal (STUN) and South Africa (VUNA).

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

Construction manual in the Nepal context estimated 7000 Nepal rupee ($68 USD) for a 50 L tank and 43000 Nepal rupee ($418 USD) for a 500 L tank.Converted to USD on 1 July 2017

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

Fertilizers sold in stores, applying urine directly or after mixing with water.

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 1: No poverty, Goal 2: No hunger, Goal 12: Responsible consumption and production

Target user(s) Target user/consumer base (country, income segment)

Communities and farmers in areas where farming is common and there hence is a market for fertilizer and a stronger incitament to recover nutrients. The struvite reactor tank is adapted to be simple to use so that anyone with some building skills and information on how the process works should be able to construct and use the tank.

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