Johkasou- The term literally means “Purification Tank” in Japanese.

Plug and Play- Denoting or relating to devices that are intended to work perfectly when first used or connected, without reconfiguration or adjustment by the user.

Grey water- The relatively clean wastewater from baths, sinks, washing machines and other kitchen appliances.

Black water– Wastewater from toilets.

Sludge– Thick, soft, wet waste obtained after the processing of sewage.

Black cotton soil– This is soil that exhibits high rates of swelling and shrinkage when exposed to changes in moisture content. This is most troublesome in cases where septic tanks are installed in such type of soil.

Effluent – Liquid waste or sewage discharged back into the environment.

BOD (Biochemical Oxygen Demand)- The amount of dissolved oxygen needed by aerobic biological organisms to breakdown organic material present in a given water sample at certain temperature over a specific time period.

TSS (Total Suspended Solids) – It is a water quality parameter used for example to assess the quality of wastewater after treatment in a waste water treatment plant.

Sedimentation– is the process of separation of solid waste from liquid waste through settlement due to difference in density.

Anaerobic– Related to, involving or requiring an absence of oxygen

Aerobic– Relating to, involving or requiring oxygen.

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