【作者】 周露；

【导师】 周元祥；

【作者基本信息】 合肥工业大学 ， 环境工程， 2009， 硕士

【摘要】 本文针对浙江某化工有限公司的医药中间体(环戊甲酰丁脒)生产废水采用铁炭微电解法和电催化法对该废水进行预处理,有效的降解了生物抑制性毒物,提高废水的可生化性,在此基础上,再经水解酸化、厌氧、好氧处理工艺实现废水的有效治理。实验证明铁炭微电解的优化工艺条件为:反应时间4h,铁屑投加量25g/L,pH = 4,铁炭质量比为7:1。当进水CODCr浓度为154692mg/L时,去除率可达30%以上,色度去除率达60%以上。讨论了电催化法预处理该废水的各种因素的影响,得到优化工艺条件为:原水pH=10.06,电压30V,电流密度0.0575A/cm2,催化时间10min,极间距4cm,进水CODCr浓度为154692mg/L,CODCr去除率可达70%以上。铁炭微电解-水解酸化-厌氧串联处理,当进水CODCr约为14000mg/L,在水解酸化6h,厌氧24h的工艺条件下,出水CODCr可降至2100mg/L,生化部分总CODCr去除率可达80%左右。电催化-水解酸化—厌氧-好氧串联处理可按稀释比例50%进水,进水CODCr约为20000mg/L以上,在水解酸化9h,厌氧24h的工艺条件下,出水CODCr仅有2000mg/L,生化部分总CODCr去除率可达90%左右。在电催化-水解酸化—厌氧-好氧之后,出水氨氮浓度可增至2000mg/L左右,采用化学沉淀法去除氨氮,得到优化工艺条件为:当好氧出水pH为10、反应时间10min、镁氮摩尔比1.1:1,磷氮摩尔比1:1,氨氮去除率最高可达90%以上。更多还原

【Abstract】 In this paper, in consideration of the character of the wastewater of Zhejiang Chemical Co., Ltd., we use iron-carbon micro-electrolysis and electrocatalysis process to pre-treatment the wastewater. It can help improve the biodegradability of wastewater, then followed by hydrolytic-acidification, anaerobic,aerobic, treatment process, to achieve the effective impact.The optimal process condition of iron-carbon micro-electrolysis pretreatment was reaction time 4h, the concentration of iron filings 25g/L, pH 4, Fe/C (mass ratio) 7:1. Inflow CODCr was 154692mg/L, and the CODCr removal rate could up to 30 percent, chroma removal rate could expand 60 percent. At the same time, this paper discussed the influence factors of electrocatalysis pre-treatment. The optimal process condition was pH 10.06 of raw wastewater, voltage 30V, current density 0.0575A/cm2, electrolytic time 10min, electrode distance 4cm. Inflow CODCr was 154692mg/L, and the CODCr removal rate could up to 70 percent.During the iron-carbon micro-electrolysis-hydrolytic-acidification-anaerobic treatment series process, the inflow CODCr was about 14000mg/L and the effluent CODCr was about 2100mg/L, under the condition of 6h hydrolytic-acidification and 24h anaerobic treatment. The total CODCr removal rate of biological treatment could up to about 80%. During the electrocatalysis– hydrolytic - acidification, anaerobic- aerobic series process. The inflow CODCr was about 20000mg/L and the effluent CODCr was about 2000mg/L. The total CODCr removal rate of biological treatment could up to about 90%.After the electrocatalysis-hydrolytic-acidification, anaerobic-aerobic series process, ammonia-nitrogen of effluent was about 2000mg/L. We use chemical precipitation to remove ammonia-nitrogen. The optimal process condition was pH 10, reaction 10min, molar ratio of magnesium and nitrogen 1.1:1, molar ratio of phosphorus and nitrogen 1.1:1, and the nitrogen removal rate could up to 90%.更多还原