生化法处理某化工企业重氮废水工艺技术研究

发布时间：2018-06-27 10:46

本文选题：重氮废水 + 可生化性　；参考：《大连海事大学》2015年硕士论文

【摘要】：随着工业生产的飞速发展,高浓度化工废水的污染日益严重。高浓度化工废水的性质和来源不同,治理较为困难,处理成本高昂。如何有效地治理高浓度废水已成为现阶段国际环境保护技术领域亟待解决的一个难题。本课题主要对某化工企业生产过程中产生的重氮废水进行了B/C可生化性评价。并通过与其它生产废水配比及通过微电解法提升废水的可生化性,评定其对重氮废水B/C提升的贡献值。通过培养驯化微生物适宜菌种的方式,及模拟生化系统反应对重氮废水展开实验。分析生化法处理重氮废水的可行性,评定某化工企业产生的重氮废水通过生化法处理的能力。小试及现场实验分析表明重氮废水不具有可生化性；通过与企业普通生产废水配比,混合、均质后可以有效提升重氮废水的可生化性；当重氮废水与生产废水4：300比例混合,B/C值可从0.22提升至0.30,达到可以生化处理的临界值。微电解反应对重氮废水可生化性的提高同样有效,可将重氮废水与生产废水比例为8：300的混合废水B/C值可提升至可以生化处理的效果。经现场实际处理验证,企业重氮废水与企业其他废水混合均质并经微电解处理后,可利用生化法进行有效处理,日处理废水量可达5m3。处理后出水COD为96mg/L、NH3-N为22 mg/L、Cl-为1386mg/L,各项指标均达到出水水质要求标准。研究表明,重氮废水与其它生产废水混合并利用微电解反应进行预处理,后续采用生化法对该重氮废水进行处理的工艺技术是的可行的。
[Abstract]:With the rapid development of industrial production, the pollution of high concentration chemical wastewater is becoming more and more serious. The nature and source of high concentration chemical wastewater are different, it is difficult to treat chemical wastewater, and the cost of treatment is high. How to effectively treat high concentration wastewater has become a difficult problem to be solved in the field of international environmental protection technology. In this paper, the biodegradability of diazo wastewater produced in a chemical enterprise was evaluated. The biodegradability of wastewater was improved by the ratio of wastewater to other wastewater and the biodegradability of wastewater was improved by microelectrolysis to evaluate its contribution to the improvement of B / C ratio of diazo wastewater. Experiments were carried out on diazo wastewater by means of culture and acclimation of microorganisms and simulation of biochemical system reaction. The feasibility of treating diazo wastewater by biochemical method was analyzed and the capacity of biazo wastewater treated by biochemical method was evaluated. Small scale test and field experiment analysis show that diazo wastewater is not biodegradable and can effectively improve the biodegradability of diazo wastewater by mixing and mixing with common production wastewater. When the ratio of diazo wastewater and production wastewater is 4: 300, the B / P C value can be raised from 0.22 to 0.30, which can reach the critical value of biochemical treatment. The microelectrolysis reaction is also effective to improve the biodegradability of diazo wastewater, and the B / C value of the mixed wastewater with the ratio of 8: 300 to the production wastewater can be raised to the effect of biochemical treatment. It has been proved by the field treatment that the diazo wastewater and other wastewater of the enterprise are mixed and homogenized and treated by micro-electrolysis, and the wastewater can be effectively treated by biochemical method, and the amount of waste water can reach 5m3 per day. The COD of treated effluent was 96 mg / L ~ (-1) NH _ 3-N = 22 mg / L ~ (-1) ~ (13 86) mg 路L ~ (-1), and each index reached the standard of effluent water quality. The results show that it is feasible to mix diazo wastewater with other production wastewater and pretreat it by microelectrolysis reaction, and then to treat the diazo wastewater by biochemical method.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X78

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