نتایج جستجو برای: anaerobic filter
تعداد نتایج: 155111 فیلتر نتایج به سال:
in this paper, startup performance of upflow anaerobic hybrid reactor and upflow anaerobic sludge blanket reactors in anaerobic treatment of distillery spentwash has been studied under identical conditions of operation. various effluent characteristics like ph, electrical conductivity, chemical oxygen demand, biochemical oxygen demand and total solids and other process parameters like biogas p...
the cane alcohol vinasse assessment on the removal efficiency of a fixed biomass anaerobic reactor (fbar) was evaluated. crude vinasse was used to feed the reactor. the fbar was operated with organic load rate (olr) of 0.5, 1, 3 and 6 gcod/l/d. removal efficiencies of 85, 82, 75 and 66 per cent were observed respectively. the fba reactor presented an excellent removal of organic matter, however...
A detailed analysis of a biotrickling filter treating trichloroethene (TCE) vapors anaerobically is presented and discussed. The biotrickling filter relies on mixed cultures containing bacteria from the genus Dehalococcoides that reductively dechlorinate TCE to ethene. After about 200 days of steady operation, as biomass in the packed bed increased, a partial loss in treatment performance was o...
Abstract Background and objectives: Anaerobic microorganisms, particularly bacteroides play an important role in causing Pulp and preapical diseases that lead to chronic abscess. we aimed at studying anaerobie infections in necrotic teeth having Acute and chronic clinical symptoms. Material and Methods: We examined 28 necrotic teeth of 28 patients for the purpose of anaerobic culture fifteen ca...
This study investigated the predictive ability of neural networks in the estimation of methane yield (MY) and effluent substrate (Se as mg/L COD) produced by two anaerobic filters, one mesophilic (35°C) and one thermophilic (55°C), which were operated to treat paper-mill wastewater at varying organic loadings. An artificial neural network (ANN) architecture was optimized to obtain a three-layer...
A laboratory scale anaerobic sludge blanket filter (ASBF) was operated for 217 days in two phases to investigate the effect of substrate concentration (2.53 – 13 g glucose/L) and hydraulic retention time (6 – 30 h HRT) at mesophilic temperature (32 ± 2 ̊C) and constant pH 5.5 for hydrogen production. At the optimized condition of 11 g glucose/L at 24 h HRT, 99.9% glucose degradation with 2.25 mo...
The primary treatment of municipal wastewater was investigated in three high-rate anaerobic filter (AF) reactors operated in parallel at different hydraulic retention time (HRT) of 0.5, 1 and 1.5 h at low ambient temperature (average = 13°C). The media in each reactor consisted of vertical sheets of reticulated-polyurethane foam (RPF) with knobs. The results demonstrated that the AF reactor was...
It is now generally recognized that anaerobic bacteria may be involved in most human bacterial infections that follow any form of surgery or are related to those body sites that have a large anaerobic population. Anaerobes must therefore be sought in a wide variety of clinical specimens. In this study, 3015 specimens of patients (1684 male and 1331 female) with periodontitis (160 cases), abcess...
It is now generally recognized that anaerobic bacteria may be involved in most human bacterial infections that follow any form of surgery or are related to those body sites that have a large anaerobic population. Anaerobes must therefore be sought in a wide variety of clinical specimens. In this study, 3015 specimens of patients (1684 male and 1331 female) with periodontitis (160 cases), abcess...
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