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Transfer Station - Underground Holding Tank

13 bytes removed, 03:48, 10 January 2013
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'''Sometimes termed Underground Holding Tanks, Transfer Stations act as intermediate dumping points for faecal sludge when it cannot be easily transported to a (Semi-) Centralized Treatment facility. A vacuum truck must empty Transfer Stations when they are full.'''
A variation is the Sewer Discharge Station (SDS), which is like a Transfer station, but is directly connected to a Conventional Gravity Sewer main (for more information, refer to [[Sewer Discharge Station|Sewer Discharge Stations]]). Sludge emptied into the SDS is released either directly or at timed intervals into the sewer main to optimize the performance of the sewer and the wastewater treatment plant, and/or reduce peak loads.
 
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Racks (screens) must be cleaned frequently to ensure a constant flow and prevent backups. Sand and grit must also be periodically removed from the holding tank. There should be a well-organized system for emptying the transfer-station; if the holding tank fills up and overflows it is no better than an overflowing pit. The pad and loading area should be cleaned regularly to minimize odours, flies and other vectors from becoming a nuisance.
==Acknowledgements=={{:Acknowledgements Sanitation}} ==References and external links==
* African Development Fund (2005). Accra sewerage improvement project- appraisal report. Infrastructure Department Central and West Regions. Available: http://www.afdb.org
* USEPA (1994). Guide to Septage Treatment and Disposal: EPA/625/R-94/002. United States Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio, USA. Available: http://www.epa.gov
 
==Acknowledgements==
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