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Constructed wetland for decentralized wastewater treatment at a school in Lusaka, Zambia. Decentralized wastewater systems (also referred to as decentralized wastewater treatment systems) convey, treat and dispose or reuse wastewater from small and low-density communities, buildings and dwellings in remote areas, individual public or private properties. [1]
BORDA has worked in India since 1979, making it the oldest region to be served by the organization. Programs implemented span the range of BORDA services, from Decentralized Wastewater Treatment (DEWATS) to Decentralized Energy Supplies. Currently, BORDA-South Asia (BORDA-SA) works in nine Indian states, as well as neighboring regions.
Chemical addition wastewater treatment; Clarifier; Coarse bubble diffusers; Composting toilet; Constructed wetland; Cross-flow filtration; Dark fermentation; Decanter centrifuge; Decentralized wastewater system; Diffuser (sewage) Dissolved air flotation; Dissolved gas flotation; Desalination; Distillation; Effluent Decontamination System ...
Constructed wetlands have been used in both centralized and decentralized wastewater systems. Primary treatment is recommended when there is a large amount of suspended solids or soluble organic matter (measured as biochemical oxygen demand and chemical oxygen demand). [3]
Onsite wastewater treatment systems have also contributed to an overabundance of nutrients in ponds, lakes, and coastal estuaries, leading to the excessive growth of algae and other nuisance aquatic plants (USEPA, 1996b). In addition, onsite systems contribute to contamination of drinking water sources.
Today, MBBR technology is used for municipal sewage treatment, industrial wastewater treatment, and decentralized wastewater treatment. This technology has been used in many different industries, some of them being: [citation needed] Automotive industry; Chemical industry; Food and beverage; Metal plating and finishing
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