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Septic Tank

1 byte removed, 15:49, 12 March 2009
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The design of a Septic Tank depends on the number of users, the amount of water used per capita, the average annual temperature, the pumping frequency and the characteristics of the wastewater. The retention time should be designed for 48 hours to achieve moderate treatment.
===Aqua privy==
[[Image:Aqua_privyss.PNG|thumb|right|150px|[[Aqua privy |Aqua privy]]]]
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