污水處理技術通過USAB的期望與現實

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污水處理技術通過USAB的期望與現實(中文3780字,英文2280字,英文PDF)
dr.vinod皮和培訓服務處內馬
摘要
與經驗超過十年,一半的USAB污水處理中的國家,有一些固有的局限性,特別是在技術和厭氧過程中一般都沒有實現。企圖從根本上產生能量或實現改善廢水水質不相稱的能源投入,違反了熱力學第二定律。城市污水是一個高ertropy材料有機負荷低,不適合作為原料的一個明顯的'液體生物反應器'希望的可靠的輸出能量。在最初需氧量'的污水從USAB反應堆有可能橫掃溶解氧接收水體非常短的時間內。后處理要求表面否定尺寸優勢往往聲稱其支持者。該發電功能,被認為是其獨特的銷售主張是沒有發現能成為一個可持續的途徑,因為低和不沼氣產量高的微生物敏感性,以溫度變化破壞厭氧工藝在冬天的時候幾乎沼氣站;要求補充燃料土著決斗燃油系統(其中確定了國家的藝術在該國) ;無法通過熱電聯產路線,余熱利用等除此之外,其環境足跡也是不可取的,腐蝕性的氛圍造成的釋放硫化氫和其他氣體造成損害的廠房,設備和毗鄰公共和私人建筑,并造成異味的鄰近社區。本文試圖把所有的局限性USAB技術和提倡替代有氧現實技術解決方案。

sewage treatment through USAB technology expectations and reality
dr.vinod tare and asit nema
abstract
with experience of over a decade and half of USAB for sewage treatment in the country, a number of inherent limitations of the technology in particular and that of anaerobic processes in general have been realized. Fundamentally attempting to generate energy or achieve improvement in wastewater quality without commensurate energy inputs is in violation of the second law of thermodynamics. Municipal sewage being a high ertropy material with low organic loads, it is not suitable as a feedstock for an apparent ‘liquid bioreactor’ promising reliable output of energy. The ‘initial oxygen demand’ of effluent from a USAB reactor has potential to sweep the dissolved oxygen of receiving water bodies in a very short period of time. Post treatment requirement prima facie negate the smaller footprint advantage often claimed by its proponents. The energy generation feature which was considered to be its unique selling proposition is not found to be a sustainable avenue either, because of low and inconsistent biogas yield-high microbial sensitivity to temperature variations which disrupts anaerobic process in winter when virtually biogas generation stops; requirement of supplementary fuel in indigenous duel fuel systems (which define the state of art in the country ); inability to adopt cogeneration route for waste heat utilization etc. on top of this, its environmental footprint is also not desirable-the corrosive ambience created by release of hydrogen sulphide and other gases causes damage to plant, equipment and adjoining public and private buildings and also creates odour nuisance for the adjacent community. This paper attempts to bring out all the limitations of the USAB technology and advocates for alternative aerobic realistic technology solutions.
 

污水處理技術通過USAB的期望與現實

 

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