【作者】 赵美霞；

【导师】 张太平； 唐建华；

【作者基本信息】 华南理工大学 ， 环境工程， 2011， 硕士

【摘要】 本课题以西安某公司精制棉生产废水为研究对象,在实验室条件下探讨了铁炭微电解处理工艺的影响因素及主要的工艺参数,并通过现场调试进一步分析了铁炭微电解组合工艺在精制棉废水处理中存在的实际问题及相关的解决方法,系统研究了该组合工艺对精制棉废水中COD_Cr、色度、SS等污染物的去除效果,结果表明本工艺可以有效去除精制棉废水中的COD_Cr和色度,并提高其生化性。根据该公司精制棉废水处理实验室条件和中试工程的实验结果及参照同类工程的成功经验,依据有关环保政策法规及建设单位提供的相关基础资料,在综合考虑处理效果、运行管理、运行成本等因素的基础上,制定了精制棉废水的处理设计方案。针对废水处理工艺运行过程中出现的主要问题进行了归纳和总结,并根据实际情况,对酸水投加系统、气浮沉淀系统、厌氧池、好氧池等进行了完善,对配药间的布置提出了优化建议。实验室条件下探讨了精制棉废水初始pH值、废水与铁屑的体积比、铁炭体积比、反应时间与铁炭微电解次数、曝气等影响铁炭微电解法处理精制棉废水的工艺条件。实验结果表明,当进水pH值控制在3左右,废水与铁屑的体积比为3:1,铁炭体积比为1:1,进行曝气,铁炭微电解次数为2次,每次反应时间为30 min的条件下,废水中的COD_Cr浓度由处理前的6000 mg/L降低至1700～2400 mg/L,去除率可以达到70%左右,有利于后续的生化处理,在技术上是可行的。对铁炭微电解组合处理工艺出水水质进行了试验研究,结果表明当PAC的投加量达到1000 mg/L时,最终出水的水质色度明显下降,出水COD_Cr为135 mg/L;或采用漂水投加和使用PAC相结合的方法时,当PAC的投加量达到250 mg/L,漂水投加量为500 ppm和接触1 h的条件下,COD_Cr的去除率可以达到52%,出水COD_Cr均可以满足《污水综合排放标准》（GB8978-1996）二级的要求。而当采用铁盐和过氧化氢等强氧化剂对生化出水进行处理时,出水效果可以达到《污水综合排放标准》（GB8978-1996）一级标准的要求。微电解工艺对COD_Cr和色度的去除率均分别可以达到60%和75%以上。铁炭微电解组合处理工艺的处理成本约为2.49元/吨废水,对COD_Cr和色度的去除效率分别可以达到87.52～97.78%和88.2～98.08%,出水的COD_Cr在132mg/L以下,色度为80倍以下,pH值在7.1～8.0之间,SS在15～65mg/L之间,可达到《污水综合排放标准》（GB8978-1996）二级标准。更多还原

【Abstract】 The target of this paper is to study the impact factors and main technological parameter of Fe/C micro-electrolyze treatment process based on the study of a cotton company, and a deep study was made to analyse the Fe/C micro electrolyze combination process, in order to solve the existed problem and provide related solutions, positive results were obtained by wiping off the COD_Cr, chroma, SS of wastewater.The treatment design program was made according to the labrotary condition and trial run results, referring to the experience of similar project, the relative environmental policy and law, and the basic materials provided by the construction unit, considerring the treatment results, operation efficiency, operation cost. Summary about the problems occurred during the trial run was made, the optimal proposal was made on acid water adding system, gas drifting system, detest oxygen pool, like oxygen pool etc.,and the arrangement of drug-disposed room.Process condition of the treatment of refined cotton by Fe/C micro electrolyze method was studied such as primary pH value, volume ratio of waster water and Fe slag, volume ratio of Fe/C, reaction time and cycles, gas revealing etc. The experimental results showed that when the pH value was controlled to be about 3, Waste water:Fe slag = 3:1, Fe/C=1:1, revealing gas was performed, and the reaction cycle was 2, reaction time = 30min, the COD_Cr was decreased from 6000 mg/L to 1700²400 mg/L, removal rate could reach to about 70%, which was beneficial to the follow-up biochemical treatment and this technology was feasible.The study was also made on the Fe/C micro electrolyze combination treatment process, results showed that when PAC = 1000mg/L, the chroma of output waster decrease, COD_Cr = 135mg/L; or use the combination method of both CL water and PAC, when the PAC = 250mg/L, the CL waster = 500ppm and reacted for 1 hour, COD_Cr removal rate reached to 52%, output water COD_Cr could comply with the requirement of“Waster waster release geneteral standard”（GB8978-1996） II grade. And when using Fe salt and H2O2 to treat the output water, the output water results can comply with the requirement of“Waster waster release geneteral standard”（GB8978-1996） I grade.When using the micro electrolize process, the removal rate of COD_Cr and chroma were 60% and 75%, respectively. The cost of Fe/C micro electrolyze combination treatment process was about 2.49 RMB/t, the removal efficiency of COD_Cr and chroma could reach to 87.52⁹7.78% and 88.2⁹8.08%, output water COD_Cr < 132mg/L,chroma< 80, pH was between 7.1 and 8.0, SS was between 15 and 65mg/L, could reach integrated wastewater discharge standard（GB8978-1996） secondary standard.更多还原