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Pilot-scale Study on Dye Wastewater Treatment by Compound Anaerobic Baffled Reactor

Author: QiZhiZuo
Tutor: RenNanZuo
School: Harbin Institute of Technology
Course: Environmental Science and Engineering
Keywords: Dyeing wastewater Pilot Anaerobic baffled reactor Removal efficiency Generalized gray relational analysis
CLC: X703.1
Type: Master's thesis
Year: 2010
Downloads: 114
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Abstract


Dyeing wastewater has a complex water quality, pH, poor biodegradability characteristics, using a single aerobic biological treatment is difficult to pull out the water discharge standards, this composite pilot scale anaerobic baffled reactor (ABR) treatment of dyeing wastewater by hydrolysis acidification of anaerobic microbial degradation of complex organic matter in the printing and dyeing wastewater for easy aerobic microorganisms using simple organics. This study identified a compound ABR and stable operation of the process parameters, engineering design and operation of the anaerobic stage of a project on innovation to provide a basis for decision making and reference Co., Ltd. Shaoxing water treatment development. This study examined the composite ABR start its run performance in the test results show that the compound ABR in HRT for 60 h at pH 7.0 to 8.5, the hydraulic load of 9.3 m ~~ 3 / (m ~~ 2 d) start volume load of 0.4 kgCOD / (m ~ 3 · d) conditions. Composite ABR dyeing and printing 84 kinds of organic matter in the wastewater is reduced to 44 kinds and effectively go in addition to certain types of dyes; influent COD range of 700 ~ 1300 mg / L, HRT for 12 h, pH fluctuations in the 7.0 to 9.0 , the effect of hydrolysis acidification than COD removal efficiency of 28.6% on average, the wastewater average B / C increased from 0.27 to 0.35; methanogenic enhanced when the pH in the 6.5 to 7.2 fluctuations, COD removal rate reached 40.0 %. SS, the average removal rate of 40.8%. Composite ABR effluent by aerobic treatment, COD range of 104 ~~ 142 mg / L, and an average of 124 mg / L, a small amount of aluminum sulfate reagent coagulation treatment standards emissions. Compound ABR reduce the level of wastewater pollution, improve the biodegradability of the wastewater, reducing the pH range of wastewater, which provides favorable conditions for the stable operation of the subsequent aerobic segment. The generalized gray correlation analysis showed that the COD removal of surface hydraulic loading volume load, water temperature, and influent SS composite ABR greater impact. The analysis results in accordance with the running performance of the compound of ABR and generalized gray correlation method to determine the stable operation of the process parameters of Compound ABR: HRT control for 12 h; the pH range of 7.0 to 9.0; alkalinity is maintained at from 600 to 1400 mg / L ; ORP maintained at -450 to -550 mV; the surface hydraulic load of 40 to 48 m to 3 / (m ~~ 2 · d); volume load of 1.3 to 2.5 kgCOD / (m to 3 · d). Can not adjust the composite ABR within through the analysis of the impact of the COD removal efficiency of the compound ABR factors that compound ABR surface hydraulic loading of the rise should not exceed the daily 3 m 3 / (m ~~ 2 · d); the temperature, but should, as far as possible, take the appropriate insulation measures; should be timely and appropriate amount of mud on the bottom of each compartment of the ABR.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization > Technology and methods
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