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Saturday, September 13, 2008

Adapting UASB technology for sewage treatment


Adapting UASB technology for sewage treatment in Palestine and Jordan [research article]


March 3, 2008 · No Comments


High rate anaerobic technologies offer cost-effective solutions for "sewage" treatment in the temperate climate of Palestine and Jordan. However, local sewage characteristics demand amendments to the conventional UASB [upflow anaerobic sludge blanket] reactor design. A solution is found in a parallel operating digester unit that stabilises incoming solids and enriches the UASB sludge bed with methanogenic activity. The digester operational conditions were assessed by operating eight CSTRs [continuous stirred tank reactors] fed with primary sludge. The results showed a high degree of sludge stabilization in the parallel digesters at SRTs [ solids retention times] 10 and 15 days at process temperatures of 35 and 25°C, respectively. The technical feasibility of the UASB-digester combination was demonstrated by continuous flow pilot-scale experiments. A pilot UASB reactor was operated for 81 days at 6 hours HRT [hydraulic retention time] and 15°C and was fed with raw domestic sewage. This period was subsequently followed by an 83 day operation period incorporating a parallel digester unit, which was operated at 35°C. The UASB-digester combination achieved removal efficiencies of total, suspended, colloidal and dissolved CODs of respectively 66, 87, 44 and 30%. Preliminary model calculations indicated that a total reactor volume of the UASB-digester system corresponding to 8.6 hours HRT might suffice for sewage treatment in Palestine. [author abstract]
Source article:  Mahmoud, N., Zeeman, G. and  Lier, J.B. van (2008). Adapting UASB technology for sewage treatment in Palestine and Jordan. Water science & technology—WST  ; vol. 57, no. 3 ; p 361–366. doi:10.2166/wst.2008.100
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2 comments:

vaibhav said...

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Additional city engineer Surendra Patil informed that the said plant is based on the most effective modern cyclic activated sludge technology (known as C-Tech) and requires 50% less space and power than the conventional STP’s in the country and are 6 times more effective in sewage treatment.
Sneha Palkar, a member of the Standing Committee who along with other member of the women and child welfare committee of NMMC visited a similar functional plant in Goa, confirmed that the treated water from this plant was as clear and clean like pure drinking water.

http://www.vashi2panvel.com/Navi-Mumbai-News/index.php?arr=item/823

http://sandeepnaik-navimumbai.blogspot.com

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