Clean waste water before it enters the environment
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
Background information and definitions
Waste water could be cleaned before it is released into the environment, or directly into marshes or swamps. Excess nutrients, salts, heavy metals, radioactive materials, organic compounds and solid waste should be removed. Acidity (pH) should be adjusted. Hot water should be cooled. Waste water can be treated through processes such as sedimentation or mechanical filtration, with bacteria or chemicals, or in ‘constructed wetlands’ that contain plants and microorganisms to absorb or break down pollutants (Kadlec et al. 2000; Siddiqui 2003).
Related actions: Remove pollutants from waste gases before they enter the environment.
Kadlec R.H., Knight R.L., Vymazal J., Brix H., Cooper P. & Haberl R. (2000) Constructed Wetlands for Pollution Control: Processes, Performance, Design and Operation. IWA Publishing, London.
Siddiqui S.A. (2003) Wastewater treatment technology in aquaculture. World Aquaculture, 34, 49–52.