نتایج جستجو برای: biological sewage treatment
تعداد نتایج: 1803477 فیلتر نتایج به سال:
The treatment of rural sewage has become an important part environmental protection. In this study, a novel waterwheel-rotating biological contactor (WRBC) system, with intensified biofilm and high-shock load resistance, was applied to treat sewage. When the COD concentration actual fluctuated between 79–530 mg/L, removal efficiency 41.3–94.5%, NH4+-N always reach 100% TN changed 14.3–86.2%, wh...
Thousands of chemicals have been identified as contaminants of emerging concern (CECs), but prioritizing them concerning ecological and human health risks is challenging. We explored the use of sewage treatment plants as chemical observatories to conveniently identify persistent and bioaccumulative CECs, including toxic organohalides. Nationally representative samples of sewage sludge (biosolid...
The development and validation of a two phase (aqueous-gas) integrated mixed weak acid/base chemical, physical and biological processes kinetic model for anaerobic digestion (AD) of sewage sludge are described. The biological kinetic processes for AD are integrated into a two phase subset of the three phase mixed weak acid/base chemistry kinetic model of Musvoto et al. (1997, 2000a,b,c). The ap...
The Cromaglass® Corporation, based in Williamsport, PA, manufactures Sequence Batch Reactor (SBR) systems for domestic wastewater treatment. A Cromaglass® CA-60, capable of treating 6,000 gallons of wastewater per day, was installed in 2005 at Hepburn-Lycoming Elementary School, part of the Williamsport School District. This SBR was the subject of a study by the Lycoming College Clean Water Ins...
Background & Aims of the Study: The most important compounds in hospital wastewater are antibiotics, disinfectants, anesthetics, radioactive elements, static cytotoxic agents, other chemicals and hazardous materials that caused to be different domestic sewage. The purpose of this study was the evaluation of performance of extended aeration biological system in pollutants remova...
This paper reports the results of two sewage treatment tests in a community of 15,000 inhabitants. The sewage treatment plant is subject to strong fluctuations in load (BOD5, COD, TKN), and in particular in the BOD5/TKN ratio. These fluctuations adversely affect the biological denitrification, as demonstrated by many pilot and real-scale plants. The plants we tested were subjected to two treatm...
© MCB University Press [ISSN 0956-6163] The authors wish to express their deep gratitude and appreciation to the Deutscher Akademischer Austauschdienst for the fellowship that was granted to Dr Abdel-Shafy throughout this study. The authors also are in great debt to the scientific co-operation of both Dipl.-Ing. N. Peschen and Dipl.-Ing. K.S. Iter, Forschungsinstitut der Forschungsgemeinschaft ...
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