Septic tank
A septic tank is an underground chamber made of concrete, fiberglass or plastic through which domestic wastewater (sewage) flows for basic treatment. Settling and anaerobic processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). Septic tank systems are a type of simple onsite sewage facility (OSSF). They can be used in areas that are not connected to a sewerage system, such as rural areas. The treated liquid effluent is commonly disposed in a septic drain field which provides further treatment. However, groundwater pollution may occur and can be a problem.
Bettani
The proposed Tank Zam Dam Project is situated across FR Tank at about 30 miles from Tank city, Khyber Pakhtunkhwa. According to rough estimate the Head Tank Zam has 1200 feet bottom and in its South West it has a semi solid hill and on its northern eastern side hills made of mud are located. Flood arriving here from different hilly torrents usually remains out of control and often splash out of its banks and start flowing in different directions and due to this reason its flood water was not fully utilized, he added. In the framed laws of 1965-66, Tank Zam has six Roodhs (Channels), which include Takwara, Siddqi, Chauha, Pir Katch, Lohra and Kiryani from the Northern side. Roodh Siddqi is the major one because large parts of the villages are irrigated with this canal. In present form, almost all the water of this Zam is used for drinking water and is supplied to city. The Bittani tribes residing near Zam also use the water for irrigation of their lands.