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The EGSB reactor II series treatment of coking wastewater running test

Author: AnFei
Tutor: DongChunJuan
School: University of North
Course: Environmental Engineering
Keywords: Two EGSB reactor Granular sludge Coking Wastewater Run
CLC: X784
Type: Master's thesis
Year: 2011
Downloads: 42
Quote: 0
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Abstract


Social and economic development is inseparable from the rapid rise of industry. Raise the level of industrial development, the majority of our level of economic development of the region has been greatly improved, but also brought some problems. Such as the deterioration of environmental issues has been firmly established. Countries more and more attention to environmental governance, waste processing has become essential. Coking wastewater is a typical biodegradable industrial waste water, with toxicity, refractory, processing technology behind the treatment effect is far from satisfactory. Encounter in the traditional coke wastewater treatment facility covers an area of ??large, long processing time, the high cost of treatment, and poor biodegradability obvious shortcomings, this paper uses a new two EGSB reactor in series, to coking wastewater for processing. I hope to make up for the inadequacies of the current traditional methods of treatment of coking wastewater through the pilot phase of the research to find a practical process, and provide a viable theoretical and practical basis for the actual promotion of that process in the future. Test coking wastewater from the the Taiyuan Coal Group coking plant regulation pool, grease traps, steam ammonia treatment of coking wastewater, water quality: COD (Chemical Oxygen Demand) of 1500 to 2500 mg / L; ammonia 50 to 210 mg / L; pH 6.5 to 8.5, in the micro-oxygen aeration conditions after two EGSB (Expanded Granular Sludge Bed) reactor processing, COD, ammonia nitrogen content are able to meet the national emission standards. Two reactor COD removal rate reached 80%, the entire system of coking wastewater cyanide, thiocyanate, volatile phenol and other toxic substances handled better. The end of the experiment, the removal efficiency of the three are able to achieve more than 90%, 99.2%, 92.7%, 99.9%, respectively. The test proved that the main pollution indicators of the process of coking wastewater COD, ammonia nitrogen good treatment effect difficult to degradation of toxic substances in the traditional process of processing, to meet the national standard. With the COD removal efficiency gradually stabilize, the granular sludge coking wastewater great changes with the previous treatment of domestic wastewater is the particle size of the granular sludge showed a clear downward trend, The scanning electron microscope can be observed within the granular sludge microbial populations larger theory, there has been gradually developed from a single population to a variety of populations, habitat, and closely related to the physical and chemical properties of coking wastewater.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Chemical industry,waste disposal and comprehensive utilization > Fuel chemical industry
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