Septic tank | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Septic_tank


00:01:40 1 Description
00:05:26 2 Emptying
00:08:07 3 Maintenance
00:08:33 3.1 User's actions
00:10:22 3.2 Other factors
00:12:14 3.3 Septic tank additives
00:13:15 4 Environmental concerns
00:13:51 4.1 Odor and gas emissions
00:14:35 4.2 Nutrients in the effluent
00:16:18 4.3 Groundwater pollution
00:17:23 4.4 Surface water pollution
00:17:54 5 Use
00:18:41 6 Regulations
00:18:51 6.1 European Union
00:20:16 6.1.1 France
00:21:37 6.1.2 Ireland
00:23:42 6.1.3 United Kingdom
00:25:22 6.2 Australia
00:26:39 6.3 United States
00:27:56 7 See also



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SUMMARY
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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.
The term "septic" refers to the anaerobic bacterial environment that develops in the tank which decomposes or mineralizes the waste discharged into the tank. Septic tanks can be coupled with other onsite wastewater treatment units such as biofilters or aerobic systems involving artificially forced aeration.The rate of accumulation of sludge—also called septage or fecal sludge—is faster than the rate of decomposition. Therefore, the accumulated fecal sludge must be periodically removed which is commonly done with a vacuum truck.