高盐高有机制药废水污泥电渗透高干脱水

doi:10.16085/j.issn.1000-6613.2019-1820

摘要/Abstract

摘要：

为研究高盐高有机制药废水污泥的电渗透脱水效果，深入认识化学污泥的电脱水过程，本文采用电渗透高干脱水技术对经抽滤脱水的高盐高有机制药废水化学污泥进行深度脱水，考察了泥饼初始pH的改变对污泥电渗透高干脱水过程中阴阳极污泥的含水率、电流、电导率、pH、zeta电位与能耗的影响，验证了对高盐高有机制药废水污泥实行电渗透高干脱水的可行性，解析了化学污泥电渗透脱水过程的机制。结果表明，泥饼pH为2、3、4时，zeta电位为正值，电渗流反向流动，无法脱水；pH增至5时，zeta电位为负值，电渗流从阴极脱除，污泥含水率从53.2%降至44.8%，脱水效果最好；但pH增至6时，脱水量有所降低。污泥电导率随pH的增加而降低。pH为5时初始电流最大。脱水15min时，即污泥含水率降至45.5%时，能源利用率最高。

关键词: 制药废水, 化学污泥, 电化学, 电渗透脱水, 含水率

Abstract:

In order to study the performance of electroosmotic dewatering process in high salinity organic pharmaceutical wastewater sludge and further understand the electroosmotic dewatering process of chemical sludge, the deep dewatering of filtrating dewatered high salinity organic pharmaceutical wastewater sludge by electroosmotic technology was investigated in this study. The effects of initial pH value on moisture content, current, conductivity, pH, zeta potential and energy consumption of the anode and cathode sludge during the electroosmotic dewatering process were evaluated, and the feasibility of electroosmotic dewatering process of high salinity organic pharmaceutical wastewater sludge was verified. The mechanism of electroosmotic dewatering of chemical sludge was discussed. The results showed that when the pH values of sludge cake was 2,3 and 4, respectively, zeta potential was positive, and electroosmotic flow was reversed, so it was unable to dehydrate. When pH increased to 5, zeta potential became negative, electroosmotic flow was removed from the cathode, and the moisture content of sludge was decreased from 53.2% to 44.8%. However, the dewatering amount decreased when the pH increased to 6. The conductivity of sludge decreased with the pH increasing. When the pH was 5, the initial current reached the maximum value. When the moisture content of sludge decreased to 45.5% after dewatering for 15min, the energy efficiency was the highest.

Key words: pharmaceutical wastewater, chemical sludge, electro chemical, electro-osmotic dewatering, moisture content

中图分类号:

X705

袁晋亭, 曾锐, 莎莉, 蔺黎明, 张凯强, 张书廷. 高盐高有机制药废水污泥电渗透高干脱水[J]. 化工进展, 2020, 39(8): 3380-3385.

Jinting YUAN, Rui ZENG, Li SHA, Liming LIN, Kaiqiang ZHANG, Shuting ZHANG. Electroosmotic dewatering of high salinity organic pharmaceutical wastewater sludge[J]. Chemical Industry and Engineering Progress, 2020, 39(8): 3380-3385.

参考文献

1	MAHMOUD A, HOADLEY A F A, CITEAU M, et al. A comparative study of electro-dewatering process performance for activated and digested wastewater sludge[J]. Water Research, 2018, 129: 66-82.
2	SHA Li, YU Xiaoyan, LIU Xingxin, et al. Electro-dewatering pretreatment of sludge to improve the bio-drying process[J]. RSC Advances, 2019, 9(47): 2718-2719.
3	MAHMOUD A, OLIVIER J, HOADLEY A F A. Electro-dewatering of wastewater sludge: influence of the operating conditions and their interactions effects[J]. Water Research, 2011, 45(9): 2795-2810.
4	MAHMOUD A, HOADLEY A F A, J-B CONRARDY, et al. Influence of process operating parameters on dryness level and energy saving during wastewater sludge electro-dewatering[J]. Water Research, 2016, 103: 109-123.
5	CHEN G, MUJUMDAR A S. Application of electrical fields in dewatering and drying[J]. Asia-Pacific Journal of Chemical Engineering, 2010, 10(3/4): 429-441.
6	J-B CONRARDY, VAXELAIRE J, OLIVIER J. Electro-dewatering of activated sludge: Electrical resistance analysis[J]. Water Research, 2016, 100: 194-200.
7	GUO Xinxin, WANG Yili, WANG Dongsheng. Permanganate/bisulfite (PM/BS) conditioning-horizontal electro-dewatering (HED) of activated sludge: effect of reactive Mn(Ⅲ) species[J]. Water Research, 2017, 124: 584-594.
8	LI Qian, LU Xuebin, GUO Haigang, et al. Sewage sludge drying method combining pressurized electro-osmotic dewatering with subsequent bio-drying[J]. Bioresource Technology, 2018, 263: 94-102.
9	李宝宏, 曹文平. 剩余污泥与化学污泥性能的比较及其混合处理[J]. 洁净煤技术, 2007(6): 82-91.
9	LI Baohong, CAO Wenping. Characteristic compare of residual and chemical sludge and combined disposal[J]. Clean Coal Technology, 2007(6): 82-91.
10	尹小延, 曾科, 司琼磊. 微波能对化学污泥脱水性能的影响[J]. 化工设计, 2009, 19(6): 42-45， 1.
10	YIN Xiaoyan, ZENG Ke, SI Qionglei. Influence of microwave energy on dewaterability of chemical sludge[J]. Chemical Engineering Design, 2009, 19(6): 42-45， 1.
11	MAHMOUD A, OLIVIER J, VAXELAIRE J, et al. Electrical field: a historical review of its application and contributions in wastewater sludge dewatering[J]. Water Research, 2010, 44(8): 2381-2407.
12	王昆, 张书良. 精馏/好氧加Fenton处理制药废水[J]. 绿色科技, 2019(16): 137-139.
12	WANG Kun, ZHANG Shuliang. Distillation/aerobic plus fenton treatment of pharmaceutical wastewater[J]. Journal of Green Science and Technology, 2019(16): 137-139.
13	YU Wenbo, YANG Jiakuan, WU Xu, et al. Study on dewaterability limit and energy consumption in sewage sludge electro-dewatering by in-situ linear sweep voltammetry analysis[J]. Chemical Engineering Journal, 2017. 317: 980-987.
14	董立文. 城镇机械脱水污泥的电渗透深度脱水技术研究[D]. 北京: 清华大学, 2012.
14	DONG Liwen. Research on electro-osmotic dewatering for the sewage sludge cake after mechanical dewatering[D]. Beijing: Tsinghua University, 2012.
15	CHEN Guohua, LAI K C K, LO I M C. Behavior of electro-osmotic dewatering of biological sludge with salinity[J]. Separation Science and Technology, 2003, 38(4): 903-915.
16	YEUNG A T, HSU C N, MENON R M. Physicochemical soil-contaminant interactions during electrokinetic extraction[J]. Journal of Hazardous Materials, 1997, 55(1/2/3): 221-237.
17	AZIZ A A A, DIXON D R, USHER S P, et al. Electrically enhanced dewatering (EED) of particulate suspensions[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2006, 290(1/2/3): 194-205.
18	董立文, 汪诚文, 张鹤清, 等. 电导率对城镇污泥电渗透脱水效果的影响[J]. 中国环境科学, 2013, 33(2): 209-214.
18	DONG Liwen, WANG Chengwen, ZHANG Heqing, et al. Effect of conductivity on the performance of electro-dewatering of municipal sludge[J]. China Environmental Science, 2013, 33(2): 209-214.
19	YANG Zhen, Duu Jong LEE. Structure evolution of wastewater sludge during electroosmotic dewatering[J]. Drying Technology, 2010, 28(7): 890-900.
20	CITEAU M, LARUE O, VOROBIE E. Influence of salt, pH and polyelectrolyte on the pressure electro-dewatering of sewage sludge[J]. Water Research, 2011, 45(6): 2167-2180.

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