Akvopedia-spade, akvouser, bot, bureaucrat, emailconfirmed, smwadministrator, smwcurator, susana-working-group-susana-member, administrator, widget editor
697
edits
Changes
→References
{|width="100%"
|style="width:50%;"|{{santable_new|
sys7=|
sys8=|
sys9=|
pic=Septic_tank.png|
ApplHousehold=XX|
Input1=Blackwater|Input2=Brownwater|Input3=Greywater| Input4= |Input5=|
Output1=Effluent |Output2=Sludge | Output3= | Output4= | Output5=
}}
|[[Image:Septic_tank.png |right|300px500px]]
|}
<br>
----
<br>
Liquid flows through the tank and heavy particles sink to the bottom, while scum (mostly oil and grease) floats to the top. Over time, the solids that settle to the bottom are degraded anaerobically. However, the rate of accumulation is faster than the rate of decomposition, and the accumulated sludge and scum must be periodically removed. The effluent of the septic tank must be
dispersed by using a [[Soak Pit]] (D.7) or [[Leach Field]] (D.8), or transported to another treatment technology via a [[Solids-free Sewer | Solids-Free Sewer]] (C.5). Generally, the removal of 50% of solids, 30 to 40% of BOD and a 1-log removal of E. coli can be expected in a well-designed and maintained septic tank, although efficiencies vary greatly depending on operation and maintenance and climatic conditions.
===Design Considerations===
===Manuals, videos, and links===
This [http://wwwwiki.lifewaterwatermissions.org/resources/san1(X(1)S(x3fkdoq5xqskutjl4j4gkmid))/GetFile.aspx?Page=Simple%20Excreta%20and%20Washwater%20Disposal%20SAN1&File=san1d4.pdf document] lists the specifications that need to be met for a succesful Aqua Privy.
===References===
* Crites, R. and Tchobanoglous, G. (1998). Small and Decentralized Wastewater Management Systems(Book). WCB/McGraw- Hill, New York, US.
* Mara, D. D. (1996). Low-Cost Urban Sanitation(Book). Wiley, Chichester, UK. (Sizing, volume and emptying calculations and example
design solutions – Chapter 6)
* Oxfam (2008). [https://oxfamilibrary.openrepository.com/bitstream/handle/10546/126711/tbn9-septic-tank-guidelines-030608-en.pdf?sequence=5&isAllowed=y Septic Tank Guidelines. Technical Brief]. Oxfam GB, Oxford, UK.:Available at: [http://policy-practice.oxfam.org.uk policy-practice.oxfam.org.uk]
* Polprasert, C. and Rajput, V. S. (1982). [https://www.susana.org/_resources/documents/default/3-2995-7-1519811046.pdf Environmental Sanitation Reviews. Septic Tank and Septic Systems]. Environmental Sanitation Information Center, AIT, Bangkok, TH. pp. 68-74. (Comprehensive design manual)
* Ulrich, A. (Ed.), Reuter, S. (Ed.), Gutterer, B. (Ed.), Sasse, L., Panzerbieter, T. and Reckerzügel, T. (2009). [https://wedc-knowledge.lboro.ac.uk/resources/books/DEWATS_-_Chapter_01.pdf Decentralised Wastewater Treatment Systems (DEWATS) and Sanitation in Developing Countries. A Practical Guide]. WEDC, Loughborough University, Leicestershire, UK.
===Acknowledgements===
{{:Acknowledgements Sanitation}}
