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Study on the Degradation of Industrial Wasterwater Generated in the Oxadiazon Production and Its Engeneering Analysis

Author: YeZuoRong
Tutor: YaoRiSheng
School: Hefei University of Technology
Course: Chemical Engineering
Keywords: Oxadiazon Pesticide Waste Water Biodegradation Synergism Engeneering Analysis
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 49
Quote: 0
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Abstract


Chemical Co., Ltd. Anhui Kelihua discharge oxadiazon production capacity of sewage disposal 401 /d, of the high salinity of the wastewater and COD concentration are the main sources of oxadiazon pesticide production, and human aware of its environment against increasingly. According to the above, the present study the following topics:1. Oxadiazon items on the background and on the existing wastewater treatment processes were investigated and analyzed. 2,4 - dichloro-phenol as a raw material, esterification, nitration, hydrolysis, etherification, reduction, diazotization and other 10-step reaction synthesis of the original drug oxadiazon. At present, the wastewater treatment processes as follows: first, by preconditioning (three-effect evaporator evaporation) separation of salt, and then by micro-electrolysis, the increase of biodegradability of wastewater. But the handling of process complexity, high cost.2. Acclimatization screening of oxadiazon degrading bacteria and the use of co-metabolism and cometabolism of inter-species approach to dealing with Oxadiazon wastewater. Two bacterias oxaW and oxaY, a fungal oxaG are screened from the aerobic biochemical pool. High degradation ability bacteria oxaW has been screened though degradation test; the strain P. aeruginosa TBPY (from engineering research institute of bio-chemical and pharmaceutical, Hefei University of Technology to collection) presered from the laboratory has been domesticated, make it can degradate oxadiazon wastewater. Then degradation tests showed that the way to the promotion of co-metabolism of the strains oxadiazon salt wastewater and distilled wastewater oxadiazon degradation. Nutrients in the external existence was most suitable for TBPY oxadiazon salt wastewater degradation, hybrid synergy between bacteria metabolism can significantly promote oxadiazon distillation wastewater degradation.3. In accordance with Chemical Co., Ltd. Anhui Kelihua clever 300t/a production oxadiazon waste water project survey analysis, engineering and technology to develop the corresponding program, that is, the use of chemical oxidation, micro-electrolysis method, Biochemistry (A/O) technology, down to the end, the COD of wastewater 500mg/L below the emission requirements to meet. In this study, based on the results of the analysis process of the sewage treatment, the oxadiazon degrading bacteria was screened, and the degrading bacteria screened been used for the biological treatment of wastewater, so as to formulate of the corresponding engineering technology program. This will harm wastewater treatment oxadiazon reference.

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