نتایج جستجو برای: after fabrication of sequencing batch reactor sbr
تعداد نتایج: 21311565 فیلتر نتایج به سال:
Background and purpose: One of the solutions for sludge production is to reduce that via decreasing the yield coefficient by oxic-settling anoxic process with different oxidation reduction potential (ORP) in sequencing batch reactor (SBR) activated sludge. Materials and methods: We used 2 SBR reactors (20 L volume) that were controlled online. At a steady state in reactors, some parameters suc...
A modified freeze-thaw method in combination with reverse transcriptase PCR was developed for monitoring gene expression in activated sludge. The sensitivity of the methodology was determined by inoculating non-sterile activated sludge samples with 3-chlorobenzoate-degrading Pseudomonas putida PPO301(pRO103), which contains the catabolic tfdB gene. tfdB mRNA was detected in 10 mg of activated s...
Wastewater from dairy industries, characterized by its high COD content and relative high COD/TKN ratio, requires post-treatment after anaerobic treatment to complete the removal of organic matter and nutrients. Due to its simplicity, robustness and low maintenance costs, sequencing batch reactors (SBR) result in an attractive system, especially in case of small dairy industries in order to com...
This paper covers the start-up of a pilot-plant experiment where land ll leachate from a Swedish municipal waste land ll (Spillepeng) was treated using a sequencing batch reactor (SBR). The leachate was characterised by high COD and NH4-N concentrations, low BOD/COD ratio, pH slightly over 7 and a high conductivity. During the studied period the mean temperature was 21°C, pH was 7.5 in the reac...
This study investigated the microbial community in a full scale anaerobic baffled reactor and sequencing batch reactor system for oil-produced water treatment in summer and winter. The community structures of fungi and bacteria were analyzed through polymerase chain reaction–denaturing gradient gel electrophoresis and Illumina high-throughput sequencing, respectively. Chemical oxygen demand eff...
Aerobic granulation of activated sludge was successfully achieved in a full-scale sequencing batch reactor (SBR) with 50,000 m(3) d(-1) for treating a town's wastewater. After operation for 337 days, in this full-scale SBR, aerobic granules with an average SVI30 of 47.1 mL g(-1), diameter of 0.5 mm, and settling velocity of 42 m h(-1) were obtained. Compared to an anaerobic/oxic plug flow (A/O)...
Background and Objectives: Phenol is one of the industrial pollutants in wastewaters, which due to its toxicity for biological systems various pretreatment processes have been used for its detoxification. In this study, the combination of catalytic ozonation process (COP) and sequencing batch reactor (SBR) were used for detoxification of these types of wastewaters. Materials and Methodology:...
A sequencing batch reactor (SBR) was operated to develop denitrifying bacteria that had a mean specific denitrification rate of 0.11 g NO3 -N/gVSS/day. Another system (an anaerobic digester) was operated to generate volatile fatty acids (VFAs) with the effluent concentration being measured to be 5655 ± 876 mg/L as acetic acid. Using the denitrifying biomass developed in the SBR and VFAs generat...
this study investigated the microbial community in a full scale anaerobic baffled reactor and sequencing batch reactor system for oil-produced water treatment in summer and winter. the community structures of fungi and bacteria were analyzed through polymerase chain reaction–denaturing gradient gel electrophoresis and illumina high-throughput sequencing, respectively. chemical oxygen demand eff...
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