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The wastewater treatment process is a kind of complex large-scale system, and also an energy intensive process. For the urban wastewater treatment plan, about 50 to 70 percent of the total power energy is consumed in the aeration stage, and meanwhile the actual control method for the aeration process usual simple and crude. So it is possible to reduce the running cost of the entire wastewater treatment...
As a new high-rate anaerobic reactor, technological features of ABSBR (Anaerobic Biofilm Sequencing Batch Reactor) and its preliminary study are introduced in this work. Two-phase ABSBR was used to treat wastewater under low concentration. The results showed that Two-phase ABSBR system can improve removal ratio of organism and suspend solid to 90% and 95% respectively with the hydraulic retention...
In order to study the effect of fillers with adsorption and drying on rubbish degradation, leachate production and water quality of leachate, five cylinder reactors for landfill disposal were built to simulate the operation of landfill, one reactor was used as contrast reactor, no filler added in it. Saw powder, activated carbon, zleolite and newspaper were added into another four reactors. In the...
Two different leachates of Chang'an landfill in Chendu were collected as the object of study. The components of organic pollutants in leachates were detected by combined GC-MS technique based on the general water quality analysis. Test results of study are as the follows: the type and nature of organic pollutant effect directly on leachate biodegradability. In high biodegradability (BOD5/CODCr = 0...
Due to the complexity of wastewater treatment process, it is difficult to apply the existing mathematical models in practice. A new model is presented for the wastewater treatment process in this paper. This model is based on Benchmark Simulation Model no.1 (BSM1) modeling method, and then simplifies Activated Sludge Model No. 1 (ASM1) which was set up to connect the secondary settler model dynamically...
Nitrous oxide production in different influent COD/N ratios was investigated in lab-scale batch reactors using nitrite and nitrate as different electron acceptors, adding ethanol as external carbon source. The results showed that the maximum production of N2O was 1.91% (nitrite) and 0.48% (nitrate) of influent nitrogen, whereas 0.22% (nitrite) and 0.31% (nitrate) in the optimal influent COD/N ratio...
Phase hybrid bio-reactor (HBR) was used in treating coke-plant wastewater by adding submerging fiber-ball fillers in suspended growth activated sludge. The optimum operation parameters for the highest performance were determined. It is found that the hybrid biological reactor works well for the coke plant wastewater treatment in terms of COD, NH4+-N and other refractory organic compounds removal...
Membrane-making wastewater contains DMF, with high COD, toxicity and non-biodegradability. In this work, aerobic Fe-C micro-electrolysis and three-dimensional electrodes technology were applied for the pretreatment aiming to improve the biodegradability of the wastewater. It was found that the optional pretreatment conditions were pH 3 for Fe-C micro-electrolysis and pH 5 for the three-dimensional...
In order to draw a conclusion of the average longitudinal removal rate of variant forms organics and presents the influent concentration and the hydraulic load curve, the removal rate and form change of the organic pollutants with the different height of the CRI are analyzed. The results indicated that: Under this experimental condition, the reduction of the organics in the CRI mainly occurred within...
Filled the divisional influent anaerobic baffled reactor (DIABR) with stuffing and the activated sludge of the secondary settling tank was inoculated for attaching bio-film to train anaerobic microorganism. The wastwater inpoured the reactor with ratio of 4:3:2:1 in the four compartments, the experiment compared with the single influent anaerobic baffled reactor (SIABR). The two reactors ran under...
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