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The variation trend of leachate, biogas production and component and settlement ratio in pre-treatment leachate recirculation landfill (PLRL) were compared with raw leachate recirculation landfill (RLRL) and no leachate recirculation landfill (NLRL). Combine the change of COD, BOD5, pH value and peak value time of biogas yield in each reactor, it can be summarized that the ratio of BOD5/COD was the...
A/O-MBR was conducted to treat simulated sewage and domestic sewage in this paper, and degradation of pollutants in reactor was studied at the same time. The results showed that the process had excellent removal efficiency of pollutants, under the conditions of C/N was 8:1~10:1, MLSS was 5~9g/L, HRT of part A was 3.93h, HRT of part O was 5.5h, DO of part A was 0~0.5mg/L, DO of part O was 1~3mg/L....
In the paper, the integrated wastewater reclamation system of the combined biological aerated filter (BAF) and dynamic membrane (DM) technology was feasible and effective for dyeing and printing wastewater treatment. The experiment was carried out continuously under of the optimal condition of hydraulic retention time (HRT) of 1.0 h, pH of 7.0-8.5, temperature of 25-30°C and an air/water volume flow...
The inhibitory effect of streptomycin on methane production of anaerobic granular sludge treating starch wastewater was investigated. The results indicated that the methane production of anaerobic granular sludge was influenced in the presence of streptomycin ranged from 0 to120 mg/L. The larger final methane production, the less remaining COD and the higher final pH value at the end of tests were...
The alkaline wastewater from oil refinery is a high concentration alkaline wastewater, which contains a great deal of sulfide, phenol and oil pollutants. A novel two stage circulating biological aerated filter (CBAF) was used to treat the alkaline wastewater after its neutralization. The factors of various air/water volumetric ratio, hydraulic retention time (HRT), which affected the removal of COD,...
This paper is focusing on the investigation of a novel anoxicoxic hybrid membrane bioreactor (A/O HMBR) for the treatment of landfill leach ate. This new technique combined an efficient anoxic and oxic biological treatment process with a membrane filtration unit and has the advantages of simplifying pre-treatment facilities, relieving the loading of the subsequent treatment processes and optimizing...
A simplified activated sludge model (SASM) was proposed, which based on the activated sludge model No.1 (ASM1). This model describes the carbon oxidation process, nitration process and denitration process. The amount of components and processes of the SASM is fewer than that of the ASM1, so the practicability of the SASM is enhanced. Using the SASM to simulate the DMBR by Biowin, the results showed...
Based on the characteristics of high COD, high ammonia and high suspended solids in livestock wastewater, a combined technology consisting of Internal Circulation (IC) anaerobic reactor and Sequencing Batch Biofilm Reactor (SBBR) was carried out. After start-up for 42 days, IC reactor could remove 80%-90% of COD with organic loading rate of 12 kg COD/(m3 day) in treating raw livestock wastewater....
Membrane bioreactor (MBR) is a new water treatment technology which combines the membrane separation technology with bio-processing unit. It has been one of the hot topics in the international research and has been widely used in various industrial, municipal wastewater treatments. This paper takes one of the key factors affecting MBR - the relationship between sludge MLSS concentration and COD water...
This paper researched the effect of aeration frequency on stabilizing process of the aerobic bioreactors, coded A1, A2 and A3 under the condition that the total amount of oxygen supplied by aeration was same. A1 was operated at aerating-to-break-operating ratio of 1:5, that aerating was 2 hours and intermittent operating lasted 10 hours. A2 was operated at ratio of 1:3, aerating for 2 hours and intermittent...
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...
A four-compartment ABR with an effective volume of 28 L was used to investigate the application of an anaerobic baffled reactor (ABR) in treating sugar-producing wastewater. The results indicated that the reactor could start up at an influent OLR of 2.5 kgCOD/m3-d and temperature of 35degC. COD removal rate could reach 89% on the 5th day. Then the influent COD increased from 5000 to 8000 mg/L, HRT...
This study investigated low temperature influence on package membrane bioreactor operation, applied in the remote mountain residential areas. During initiation, F/M ratio should be controlled above 0.05 kgCOD/kgMLSS-d by adjusting inoculated sludge concentration. Operation experienced three phases divided by temperature. Above 12degC, package MBR could keep excellent COD and NH3-N removal rate, and...
The applied OLR and SLR are among the important parameters to govern bioreactor performance and the sludge characteristics. After successful aerobic granulation in a SBR, the OLR was increased stepwise from 4 to 12 g/(L-d) until the aerobic granules disintegrated into flocculent sludge. Effects of these loading rates on bioreactor performance and sludge surface characteristics such as exocellular...
Put dead immobilized beer yeast into column of continuous-upflow reactor, study adsorption characteristics on Cu2+ through axial-magnification and axial-radial-magnification tests of column and industrial wastewater treatment. The results showed: with initial Cu2+ concentration 20 mg/L, in axial- magnification test and axial-radial-magnification tests, flow rates of 35 mL/min and 100 mL/min were optimal...
Aerobic granular sludge was cultured successively and stably existed in the membrane bioreactors, inoculated by floccular activated sludge and fed with glucose as organic substrate by means of special alternating anaerobic-aerobic operation mode. Microscopic observation of the granular showed that the morphology of granules was nearly spherical or elliptical with dense structure and its mean diameter...
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