高浓度切削液废水电絮凝破乳及影响因素实验研究
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摘要
采用电絮凝法对高浓度切削液废水进行破乳实验,考察实验条件对破乳效果影响。实验结果表明:在阳极-阴极采用铝板-316不锈钢、电流密度20. 0 m A/cm~2、极板间距4. 0 cm、反应时间70. 0 min和pH=8. 0条件下,破乳效果最好,CODCr去除率可以达到97. 4%;电絮凝破乳主次因素依次为:电流密度>极板间距>pH>反应时间。采用电絮凝方法可以快速高效的达到破乳效果实现油水分离,同时去除高浓度切削液废水中的COD_(Cr),降低了后续深度处理的工艺难度,具有较好的应用推广前景。
The high-concentration cutting fluid wastewater was subjected to the demulsification experiment by electric flocculation method and the influence of experimental conditions on the demulsification effect was investigated.The experimental results showed that the demulsification effect was the best and the removal rate of COD_(Cr) can reach 97. 4%,when anode-cathode material was aluminum plate-316 stainless steel,current density was 20.0 m A/cm~2,plate spacing was 4.0 cm,reaction time was 70.0 min and pH was 8.0. The order of the main influential factors of electrocoagulation and demulsification were as follows: current density, plate spacing, pH, reaction time. The electrocoagulation method can quickly and efficiently achieve the demulsification effect to achieve oil-water separation and remove COD_(Cr) in the high-concentration cutting fluid wastewater at the same time,which reduced the process difficulty of subsequent deep treatment and had a good application and promotion prospect.
The high-concentration cutting fluid wastewater was subjected to the demulsification experiment by electric flocculation method and the influence of experimental conditions on the demulsification effect was investigated.The experimental results showed that the demulsification effect was the best and the removal rate of COD_(Cr) can reach 97. 4%,when anode-cathode material was aluminum plate-316 stainless steel,current density was 20.0 m A/cm~2,plate spacing was 4.0 cm,reaction time was 70.0 min and pH was 8.0. The order of the main influential factors of electrocoagulation and demulsification were as follows: current density, plate spacing, pH, reaction time. The electrocoagulation method can quickly and efficiently achieve the demulsification effect to achieve oil-water separation and remove COD_(Cr) in the high-concentration cutting fluid wastewater at the same time,which reduced the process difficulty of subsequent deep treatment and had a good application and promotion prospect.
引文
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[19]GB 11914-89水质化学需氧量的测定重铬酸盐法[S].
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[21]Reza Katal,Hassan Pahlavanzadeh. Influence of different combinations of aluminum and iron electrode on electrocoagulation efficiency:Application to the treatment of paper mill wastewater[J]. Desalination,2010,265(1):199-205.
[22]B Merzouk, B Gourich, A Sekki, et al. Removal turbidity and separation of heavy metals using electrocoagulation-electroflotation technique[J]. Journal of Hazardous Materials,2008,164(1):215-222.
[2]胡金成,陈霁恒,陈淳辉,等.金属切削液的环境行为分析与评价[J].环境保护,2008(24):40-42.
[3]Silva V F,Batista L N,De Robertis E,et al. Thermal and rheological behavior of ecofriendly metal cutting fluids[J]. Journal of Thermoelectricity,2016,123(2):973-980.
[4]严松.破乳—中性催化氧化处理铝材切削液废水研究[D].华南理工大学,2016.
[5]M Kobya,C Ciftci,M Bayramoglu,et al. Study on the treatment of waste metal cutting fluids using electrocoagulation[J]. Separation and Purification Technology,2007,60(3):285-291.
[6]钟登杰.电化学转盘法处理切削液废水[J].重庆理工大学学报(自然科学版),2011,25(3):43-46,68.
[7]Emily N Tummons,Volodymyr V Tarabara,Jia Wei Chew,et al.Behavior of oil droplets at the membrane surface during crossflow microfiltration of oil-water emulsions[J]. Journal of Membrane Science,2016,500:211-224.
[8]Chang Q,Wang X,Wang Y,et al. Effect of hydrophilic modification with nano-titania and operation modes on the oil-water separation performance of microfiltration membrane[J]. Desalination and Water Treatment,2016,57(11):4788-4795.
[9]陈炜鸣.臭氧高级氧化法处理垃圾渗滤液中难降解有机物的效能与机理[D].成都:西南交通大学,2018.
[10]李洪瑞.机械加工切削液废水的处理研究[D].哈尔滨:哈尔滨工业大学,2013.
[11]韩卓然,于静洁,王少坡,等.铝盐和铁盐混凝对切削液废水中有机物的去除特性[J].工业水处理,2018,38(3):81-85.
[12]尹季璇,于静洁,陈兆波,等.高浓度切削液废水酸析-混凝破乳实验研究[J].工业水处理,2017,37(1):68-72.
[13]王春雨,乔瑞平,李海涛,等.混凝-强化微电解深度处理煤气化废水的研究[J].环境科学与技术,2015,38(S1):241-245,280.
[14]郭玥,杜磊,李庆,等.不同铝系混凝剂处理印染废水[J].环境工程学报,2016,10(4):1847-1852.
[15]Shahin Ghafari,Hamidi Abdul Aziz,Mohamed Hasnain Isa,et al.Application of response surface methodology(RSM)to optimize coagulation-flocculation treatment of leachate using poly-aluminum chloride(PAC)and alum[J]. Journal of Hazardous Materials,2009,163(2):650-656.
[16]S Yu Bratskaya,A V Pestov,Yu G Yatluk,et al. Heavy metals removal by flocculation/precipitation using N-(2-carboxyethyl)chitosans[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects,2009,339(3):140-144.
[17]Chunjiang An,Gordon Huang,Yao Yao,et al. Emerging usage of electrocoagulation technology for oil removal from wastewater:A review[J]. Science of the Total Environment,2017,579:537-556.
[18]陈强.电絮凝法处理三次采油废水的研究[D].上海:华东理工大学,2017.
[19]GB 11914-89水质化学需氧量的测定重铬酸盐法[S].
[20]李萌,张翔宇.电絮凝法处理电镀废水中重金属的研究[J].安全与环境学报,2016,16(1):217-220.
[21]Reza Katal,Hassan Pahlavanzadeh. Influence of different combinations of aluminum and iron electrode on electrocoagulation efficiency:Application to the treatment of paper mill wastewater[J]. Desalination,2010,265(1):199-205.
[22]B Merzouk, B Gourich, A Sekki, et al. Removal turbidity and separation of heavy metals using electrocoagulation-electroflotation technique[J]. Journal of Hazardous Materials,2008,164(1):215-222.