نتایج جستجو برای: activated sludge
تعداد نتایج: 233523 فیلتر نتایج به سال:
A bioreactor refers to any manufactured or engineered device that supports a biologically active environment. These kinds of reactors are designed to treat wastewater treatment. Volumetric mass transfer coefficient and the effect of superficial gas velocity, as the most important operational factor on hydrodynamics, in three-phase airlift reactors are investigated in this study. The experiments...
activated sludge or extended aeration treatment involves a continous system where aerobic biological growths are mixed with waste water and then separated in a gravity clarifier. therefore, waste treatment system such as the activated sludge system depend on the activities of communities of living organism. in this study, an attempt was made on the indentification of the bacterial population in...
introduction: the powdered activated carbon treatment (pact) has been proposed as an alternative in wastewater treatment and wastewater biomass protection against toxic substances. this study aims to evaluate pact performance in treating dyes, acid orange, and remazol brilliant reactive blue. methods: this empirical- applied research was carried out in pilot scale in which different dye removal...
activated sludge is an aerobic biological wastewater treatment process. this process has been efficiently and extensively used for the treatment of industrial and municipal wastewaters since about 100 years ago. some drugs such as antibiotics have adverse effects on the bacteria in activated sludge. cefixime trihydrate is a semi-synthetic antibiotic belonging to the third generation of cephalos...
background: domestic and industrial wastewaters are mostly treated by biological process such as activated sludge, aerobic pond, and anaerobic treatment. this study focuses on characterizing the quality of sewage sludge in the sultanate of oman chosen from three industrial sewage treatment plants (stps): rusayl industrial estate (rsl.ie); sohar industrial estate (sie); and raysut industrial est...
Background: In this study, the effect of wastewater produced by pistachio processing in processing terminals on wastewater treatment plants with activated sludge process was investigated. Methods: The pilot of activated sludge was constructed at the laboratory scale similar to wastewater treatment plant in Kerman and it was investigated in different ratios of the wastewater of pistachio proces...
A synthetic wastewater with high concentration of sulfate and COD was treated in anaerobic baffled reactor (ABR) coupled with an activated sludge. The work was accomplished in two phases. In the first phase, the concentration of sulfate was kept constant at 500mg/l, but COD concentration was increased from (3000mg/l to 6000mg/l), consequently, COD and sulfate removal in ABR reached to 80% and 9...
Abstract Background: In recent years researchers have shown that increasing in pressure drop and low amount of elimination capacity are two main limitations of biofiltration systems in pollutants treatment. Therefore, the main goal of this study was to investigate the relationship between pressure drop and hydrogen sulfide (H2S) elimination capacity with different mass loading rates in biof...
aims: intensification of current environmental legislation leads to an increase wastewater treatment sludge volume. so reducing the sludge volume is considered as a strategy to improve and solve the problems of secondary pollution of sludge. dissolved air flotation (daf) as a substitute clarifier is used for separation of activated sludge liquid-solid phases. the aim of this study was to estima...
activated sludge is an aerobic biological wastewater treatment process. this process has been efficiently and extensively used for the treatment of industrial and municipal wastewaters since about 100 years ago. some drugs such as antibiotics have adverse effects on the bacteria in activated sludge. cefixime trihydrate is a semi-synthetic antibiotic belonging to the third generation of cephalos...
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