Buying or Selling Wastewater by- or recovered products

The Wastewater Exchange is matching offers and demands of wastewater by- and recovered products such as clean water, renewable energy, treated water, bio-fertilisers, bio-cements, polymers, detergents, disinfectants.

Off-takers of WasteWater By- or Recovered Products

Get cheaper production inputs such as clean water, fertilizers, renewable energy, fertilisers …etc from transformed wastewater.


Sellers of  WasteWater By-or Recovered Products 

We proactively find buyers of wastewater by-products for our members.  The off-takers of those products can be end-consumers off goods or services embedding inputs from transformed wastewater. 

Water is the common element of every good and service.

The value and level of cleanliness of reclaimed water depend on the item or service produced thanks to this water.h20

Renewable and clean energy can be generated thanks to wastewater.

For example, algae can grow on wastewater, clean it and be transformed into biofuel and/or treated wastewater can be used for hydro power.

Pooling resources can be also applicable for funding climate friendly energy infrastructure projects.

For blended finance we collaborate with Blue Yellow a  fintech platform connecting renewable energy projects with investors.

A wastewater plant can produce more energy than it needs and can be a “green power station” with anaerobic digestion during which micro-organisms break down materials from wastewater (to which solid bio-wastes can be added). The biogas/methane gas produced from this process is then used to generate heat and electricity.


Are you interested not only to ‘offset’ your carbon footprint and to know exactly


your CO2 carbon footprint has been sequestered and absorbed thanks to wastewater?

Gold, silver or other metals can be recovered from wastewater (see:

For example, chromium used in metal-plating industries or leather tanning can be recovered in wastewater thanks to specific filters and technology. Chromium-6 (hexavalent chromium) bath can be re-used/re-cycled for several cycles of plating or dyes by filtering iron and other contents. This also enhances the quality of plating. The sludge that comes out after filtration can then be valorized safely into clean water and/or biogas and/or other outputs.

Recovering nutrients from wastewater is key for healthy food security and for sustainability. 

- Phosphorus is used for fertilizers, as an animal feed additive, treatment of metals, batteries, fire extinguishers, ...etc.

Every year, the drains and sewers carry more than 16 million tonnes of dissolved nitrogen and 3m tonnes of phosphorus. Four-fifths of the first element and half of the second are supplied by human urine, and the resource isn’t simply wasted: this global excess of nutrients goes on to nourish dangerous levels of plant growth and increase oxygen demand in the world’s waters, restraining aquatic life e.g. in oceans.

- Sodium is washed out from rocks and soils. Many laundry detergents use sodium salts as fillers, adding significant sodium to the wastewater. Lighter than water, sodium conducts heat and electricity easily and is used for batteries. Sodium is used in different forms; for example Sodium vapor is used in streetlights and produces a brilliant yellow light.

- Ammonia in wastewater is a contaminant and hazardous to the environment. Ammonia in a fuel cell is nonetheless energy dense in volume and comparable to hydrogen in performance

Transforming wastewater sludge in bio-cements can:

  • decrease the cement industry greenhouse gas emissions
  • reduce long distance transport of this construction material
  • enhance the durability of building materials and structures

Polymers can be recovered from oily wastewater.

Polymers can be generated from wastewater. For example, algae grown in wastewater from livestock farms, municipalities, distilleries, etc. can be transformed into biofuels or biopolymers.

Methylene blue dye can be recovered from textile or tannery wastewater and reused e.g. to store and to produce energy.

Recovery of silk sericin from the filature wastewater.

Sericin protein has high additional value in many industries such as textiles, pharmaceuticals and cosmetics.