铁碳微电解在造纸废水处理工艺中合理位置的探究
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摘要
针对造纸废水处理成本高的问题,采用循环伏安法对某造纸厂初沉、厌氧和好氧出水的氧化还原特性进行了分析,并以反应时间、COD去除率、可生化性、铁利用率及运行成本为指标,确定了增设的铁碳微电解在处理工艺中的合理位置。结果表明,厌氧出水含有较多易氧化和易还原性有机物,当铁碳微电解反应时间为30 min时,厌氧出水COD去除率可达63.09%,BOD5/COD可由0.11提高至0.18。将铁碳微电解置于厌氧单元后,形成初沉—厌氧—铁碳微电解—好氧—混凝的工艺,是较为合适的。
In view of the problem of high cost in the treatment of paper-making wastewater,cyclic voltammetry(CV)has been used for the analysis on the redox characteristics of primary settling effluent,anaerobic effluent,and aerobic effluent. Considering the reaction time,removing rate of COD,biodegradability,iron utilization and operating costs as indexes, the optimal position of supplementary iron-carbon micro-electrolysis in the treatment process has been determined. The results show that anaerobic effluent contains more easily oxidized and reduced organic matter. When the reaction time is 30 min,the removing rate of COD of anaerobic effluent reaches 63.09%,and the BOD5/COD can be improved from 0.11 to 0.18. It is more appropriate to set the iron-carbon micro-electrolysis after the anaerobic unit,so as to form the process of primary sedimentation-anaerobic-iron-carbon micro-electrolysis-aerobic-coagulation.
In view of the problem of high cost in the treatment of paper-making wastewater,cyclic voltammetry(CV)has been used for the analysis on the redox characteristics of primary settling effluent,anaerobic effluent,and aerobic effluent. Considering the reaction time,removing rate of COD,biodegradability,iron utilization and operating costs as indexes, the optimal position of supplementary iron-carbon micro-electrolysis in the treatment process has been determined. The results show that anaerobic effluent contains more easily oxidized and reduced organic matter. When the reaction time is 30 min,the removing rate of COD of anaerobic effluent reaches 63.09%,and the BOD5/COD can be improved from 0.11 to 0.18. It is more appropriate to set the iron-carbon micro-electrolysis after the anaerobic unit,so as to form the process of primary sedimentation-anaerobic-iron-carbon micro-electrolysis-aerobic-coagulation.
引文
[1]中华人民共和国环境保护部.中国环境统计年报2014[M].北京:中国环境出版社,2015:96-100.
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[13]黄理辉,马鲁铭,王红武.催化铁内电解法对胞外聚合物形成的影响[J].中国环境科学,2005,25(6):660-663.
[2]Kamali M,Khodaparast Z.Review on recent developments on pulp and paper mill wastewater treatment[J].Ecotoxicology and Environmental Safety,2015,114(4):326-342.
[3]彭蜀君,董贝,秦丹,等.铁碳微电解工艺预处理制药废水实验研究[J].环境科学与技术,2012,35(6):270-273.
[4]Luo Jinghuan,Song Guangyu,Liu Jianyong,et al.Mechanism of enhanced nitrate reduction via micro-electrolysis at the powdered zerovalent iron/activated carbon interface[J].Journal of Colloid&Interface Science,2014,435:21-25.
[5]李涛,鲍锦磊,于淼,等.铁碳微电解法深度处理燃料乙醇生产废水[J].环境工程学报,2013,7(3):999-1003.
[6]徐茂田,朱效华.单壁炭纳米管修饰电极循环伏安法测定盐酸利多卡因[J].理化检验:化学分册,2013,49(5):550-553.
[7]左妍,刘晶,边德军,等.铁碳微电解法处理聚四氢呋喃废水试验研究[J].环境科学与技术,2010,33(12):261-262.
[8]Fu Fenglian,Dionysiou D D,Liu Hong.The use of zero-valent iron for groundwater remediation and wastewater treatment:A review[J].Journal of Hazardous Materials,2014,267:194-205.
[9]Noubactep C.The fundamental mechanism of aque ous contaminant removal by metallic iron[J].Water SA,2010,36(5):663-670.
[10]潘全,王惠,杨玉娇,等.铁碳微电解处理印染废水的研究[J].湖北大学学报:自然科学版,2011,33(2):165-167.
[11]马鲁铭.废水的催化还原处理技术:原理及应用[M].北京:科学出版社,2008:130-140.
[12]潘碌亭,余波,吴锦峰,等.铁炭微电解—厌氧—好氧工艺处理制浆造纸废水[J].工业水处理,2010,30(9):43-44.
[13]黄理辉,马鲁铭,王红武.催化铁内电解法对胞外聚合物形成的影响[J].中国环境科学,2005,25(6):660-663.