VAE乳液废水处理技术研究
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摘要
醋酸乙烯-乙烯共聚乳液(VAE),是一种重要化工产品,在生产过程中会产生大量VAE乳液废水,具有COD含量高、浊度高以及呈稳定的乳液状的特点,可生化性差,属较难处理的工业废水,直接排放将给水体带来严重的污染。
本课题采用混凝-沉淀和混凝-气浮方法,对VAE乳液废水的处理效果进行了研究;对无机混凝剂与有机高分子混凝剂复合投加处理VAE乳液废水的效果和影响因素进行了考察。
混凝-沉淀和混凝-气浮试验结果表明,两种工艺对VAE乳液废水均有明显的去除效果,混凝-气浮方法的处理效果更佳。在最佳的处理条件下,混凝-气浮方法出水水质可达到《污水综合排放标准》(GB 8978-1996)中要求的二级排放标准,而且具有较高的抗冲击负荷能力。试验中还确定了三氯化铁的最佳投量、最佳pH值、最佳水力条件等主要影响因素的参数指标,可以为实际工程提供技术参数。
无机混凝剂与有机高分子混凝剂复合应用的试验研究结果表明,阳离子型聚丙烯酰胺对无机混凝剂三氯化铁具有较好的助凝效果。尤其是采用混凝-气浮法,投加少量的阳离子型聚丙烯酰胺即可有效降低混凝三氯化铁投量,而且可使出水水质达到《污水综合排放标准》(GB 8978-1996)中要求的一级排放标准。
技术和经济分析认为,采用混凝-气浮方法处理VAE乳液废水,投加复合高效混凝剂,具有投药量少,处理成本低,抗冲击负荷能力强,处理效果稳定高效等特点,经济效益好。
Vinyl Acetate-Ethylene Copolymer Emulsion(VAE) is an important chemical product, There will be a large number of VAE emulsion wastewater during the production processes. The VAE emulsion wastewater is difficult to be treated, with the characteristics of high COD, high turbidity, poor biodegradability and high stability.Serious water pollution will be caused if the VAE emulsion wastewaters are discharged directly into water body.
Coagulation-sedimentation and coagulation-air flotation processes are used to treat the VAE emulsion wastewater and effects of the process are studied in the study.The efficiencies and influence factors of the VAE emulsion wastewater treatment processes are investigated by composited dosing with inorganic coagulants and organic high molecular flocculants.
Experiment results indicate that coagulation-sedimentation and coagulation-air flotation processes are both effective, with the coagulation-air flotation more effective . Under the best experimental condition, the effluent quality of the coagulation-air flotation process can be satisfied with the Class-Two Discharge Standard,specified in the integrated Wastewater Discharge Standard (GB8978-96). In addition, the process is provided with stronger ability of shock resistance load. The optimum conditions of ferric choride dosage, pH value, hydrodynamic condition and other factors are confirmed by experiments.The results can be acted as technical references for engineering applications.
The experiment results with composited applications of inorganic coagulant and organic high molecular flocculant indicate that cationic polyacrylamide (PAM) is provided with better coagulation aid action to ferric chloride. The ferric chloride dosage is decreased by a litter addition of cationic PAM for the coagulation-air flotation process. The effluent quality can be satisfied with the Class-Two Discharge Standard, specified in the integrated Wastewater Discharge Standard (GB8978-96).
Technical and economical analyses are considered that the VAE emulsion wastewater is treated feasibly by the cogagulation-air flotation process with inorganic coagulant and organic high molecular flocculant. The process has the characteristics of low coagulant dosage, low treatment cost, strong ability of shock resistance load, high and stable treatment efficiency, and better economic benefits.
本课题采用混凝-沉淀和混凝-气浮方法,对VAE乳液废水的处理效果进行了研究;对无机混凝剂与有机高分子混凝剂复合投加处理VAE乳液废水的效果和影响因素进行了考察。
混凝-沉淀和混凝-气浮试验结果表明,两种工艺对VAE乳液废水均有明显的去除效果,混凝-气浮方法的处理效果更佳。在最佳的处理条件下,混凝-气浮方法出水水质可达到《污水综合排放标准》(GB 8978-1996)中要求的二级排放标准,而且具有较高的抗冲击负荷能力。试验中还确定了三氯化铁的最佳投量、最佳pH值、最佳水力条件等主要影响因素的参数指标,可以为实际工程提供技术参数。
无机混凝剂与有机高分子混凝剂复合应用的试验研究结果表明,阳离子型聚丙烯酰胺对无机混凝剂三氯化铁具有较好的助凝效果。尤其是采用混凝-气浮法,投加少量的阳离子型聚丙烯酰胺即可有效降低混凝三氯化铁投量,而且可使出水水质达到《污水综合排放标准》(GB 8978-1996)中要求的一级排放标准。
技术和经济分析认为,采用混凝-气浮方法处理VAE乳液废水,投加复合高效混凝剂,具有投药量少,处理成本低,抗冲击负荷能力强,处理效果稳定高效等特点,经济效益好。
Vinyl Acetate-Ethylene Copolymer Emulsion(VAE) is an important chemical product, There will be a large number of VAE emulsion wastewater during the production processes. The VAE emulsion wastewater is difficult to be treated, with the characteristics of high COD, high turbidity, poor biodegradability and high stability.Serious water pollution will be caused if the VAE emulsion wastewaters are discharged directly into water body.
Coagulation-sedimentation and coagulation-air flotation processes are used to treat the VAE emulsion wastewater and effects of the process are studied in the study.The efficiencies and influence factors of the VAE emulsion wastewater treatment processes are investigated by composited dosing with inorganic coagulants and organic high molecular flocculants.
Experiment results indicate that coagulation-sedimentation and coagulation-air flotation processes are both effective, with the coagulation-air flotation more effective . Under the best experimental condition, the effluent quality of the coagulation-air flotation process can be satisfied with the Class-Two Discharge Standard,specified in the integrated Wastewater Discharge Standard (GB8978-96). In addition, the process is provided with stronger ability of shock resistance load. The optimum conditions of ferric choride dosage, pH value, hydrodynamic condition and other factors are confirmed by experiments.The results can be acted as technical references for engineering applications.
The experiment results with composited applications of inorganic coagulant and organic high molecular flocculant indicate that cationic polyacrylamide (PAM) is provided with better coagulation aid action to ferric chloride. The ferric chloride dosage is decreased by a litter addition of cationic PAM for the coagulation-air flotation process. The effluent quality can be satisfied with the Class-Two Discharge Standard, specified in the integrated Wastewater Discharge Standard (GB8978-96).
Technical and economical analyses are considered that the VAE emulsion wastewater is treated feasibly by the cogagulation-air flotation process with inorganic coagulant and organic high molecular flocculant. The process has the characteristics of low coagulant dosage, low treatment cost, strong ability of shock resistance load, high and stable treatment efficiency, and better economic benefits.
引文
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2 刘卫红.VAE 废水和废渣的利用.重庆环境科学学报,2000,22(5):61~62
3 钱汉卿,左宝昌.化工水污染防治技术.中国石化出版社.2004.07:10~12
4 李维盈,凌爱莲.VAE 乳液废水的复合改型研究.北京工业大学.2001.05:27~69
5 A.Pinotti,N.Zaritzky.Effect of Aluminum Sulfate and Cationic Polyelectrolytes on the Destabilization of Emulsified Wastes.Waste Management,2001,21(6):535~542
6 A.L.Ahmad,S.Sumathi,B.H.Hameed.Coagulation of Residue Oil and Suspended Solid in Palm Oil Mill Effluent by Chitosan,Alum and PAC,2006,118(2):99~105
7 田禹,范丽娜.高浓度乳化液废水处理工艺及机制.哈尔滨工业大学学报,2004,36(6):756~758
8 倪伟敏,等.混凝法处理乳化液的研究.环境污染与防治,2003,25(1):39~42
9 M.Hanafy,H. J. Nabih. Treatment of Oily Wastewater Using Dissolved Air Flotation Technique, Energy Sources,2007,29(1):143~159
10 N.I.Galil,D.Wolf.Removal of Hydrocarbons from Petrochemical Wastewater by Dissolved Air Flotation .Water Science and Technology,2001,43( 8):107~113
11 吴少杰,李朝辉,朱泮民,刘萍.化学复合破乳剂处理冷轧乳化液废水的试验研究,给水排水,2004,30(2):45~47
12 毕东苏,姜安玺,顾国维,李咏梅.混凝气浮过滤处理机械加工废水的试验研究,工业水处理,2004,24(2):33~35
13 O.Legrini,E.Oliveros,A.M.Braun.Photochenical Processes for Water Treatment.Chem rev,1993,(93):671~698
14 C. Zerva,Z.Peschos,S.G.Poulopoulos,C.J.Philippopoulos.Treatment of Industrial Oily Wastewaters by Wet Oxidation, Journal of Hazardous Materials,2003,97(4):257~265
15 S.G. Poulopoulos,C.J. Philippopoulos. Photo-assisted Oxidation of an Oily Wastewater Using Hydrogen Peroxide.Journal of Hazardous Materials,2003,98(3):201~210
16 卢仪程,赵建夫,李天琪.高浓度乳化废水芬顿氧化试验研究.工业用水与废水,1999,30(4):20~22
17 唐文伟,曾新平,赵建夫,顾国维.高浓度难降解乳化废水湿式氧化动力学.环境污染与防治,2004,26(1):19~21
18 N.Saifuddin, K.H.Chua.Treatment of Oily Wastewater Emulsions from Metallurgical Industries Using Microwave Irradiation,Biotechnology,2006,5(3):308~314
19 王鹏,田艳,张威,张国宇. 微波辐射处理乳化废水的研究,哈尔滨工业大学学报, 2007,39(8):1233~1235
19 孙宝江,乔文孝,付静.三次采油中水包油乳状液的超声破乳,石油学报,2002,21(6):97~101
20 谷和平,时均,王延儒.陶瓷膜处理含油乳化废水的技术开发及传递模型研究.南京工业大学,2003.05.01:6~13
21 M.Gryta, K.Karakulski, A.W.Morawaki. Purification of Oily Wastewater by Hybrid UF/MD.Water Reserch.2001,35(15):3665~3669
22 M.Dick. Raymond. Ultra Filtration for Oily Wastewater Treatment, Lubrication Engineering ,1982,38(4):219~222
23 窦从容,周琪,陆善忠.采用超滤工艺处理乳化液废水.同济大学.2003.09.01:53~54
24 T.Ya. Pazenko, T.I. Khalturina, A. F. Kolova, I. S. Rubailo. Electro Coagulation Treatment of Oil-Containing Wastewaters, Journal of Applied Chemistry of the USSR,1985,58(11):2383~2387
25 刘红,吴克明,马丽娜.电凝聚处理轧制乳化废水的研究,环境科学与技术,2005,28(6):80~82
26 汤鸿霄.无机高分子混凝剂的基础研究,环境化学,1990,9(3):1~12
27 G. S. Pokrovski, J. Schott, F. Farges, et al . Iron( Ⅲ )-silica Interactions in Aqueous Solution : Insights from X-ray Absorption Fine Structure Spectroscopy . Geochim Cosmochim Acta ,2003,67(19):3559~3572.
28 张瑛,阮晓红.水处理混凝剂及其发展方向,污染防治技术,2003,16(4):45~49
29 孙剑辉.聚硅酸盐类混凝剂的研究进展.工业水处理,2000,20(3):4~7.
30 吴宇峰.高效混凝剂聚合氯化硫酸铁的制备及其混凝效果的研究成果.工业水处理,2000,20(10):24~26
31 刘峙嵘.聚合磷硫酸铁的合成研究成果.工业水处理,1999,19(1):19~20
32 刘万毅.复合混凝剂 PAFCS 的絮凝研究.工业水处理,1996,16(4):29~30
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