Study of ozone dosage via disinfection by-product formation potential controlling in drinking water treatment

doi:10.11949/j.issn.0438-1157.20171437

Abstract

Abstract:

This study is based on a demonstration project of pre-ozonation+conventional water treatment+ advanced treatment(O₃-BAC) process in a drinking water treatment plant in Jiangsu province. Besides regular evaluation index examination such as turbidity, TOC, COD_Mn and UV₂₅₄, this study focused on effects of ozone dosage on the removal efficiency of disinfection by-product formation potential (DBPFP), mainly total trihalomethanes formation potential (TTHMFP) and total halogen acid formation potential (THAAFP) in each treatment unit. When the O₃ dosages in the pre-ozone unit and O₃-BAC unit were 1.1 mg·L^-1 and 1.8 mg·L^-1, respectively, trichloromethane chloroform formation potential (TCMFP) was the dominant THMFP species to be removed which account for 86.8% and 60.2%, respectively of TTHMFP removal mass. Trichloroacetic acid generating potential (TCAAFP) was the dominant THAAFP species to be removed in the pre-ozone unit which occupied an average of 77.2% of total THAAFP removal mass. In the O₃-BAC treatment unit, chloride haloacetic acid formation potential (Cl-HAAFP) was the dominant HAAFP species to be removed and accounted for 70.2% of THAAFP removal mass. The optimized pre-ozonation+conventional water treatment+advanced treatment(O₃-BAC) process finally removed up to 21.9% and 63.2% of TTHMFP and THAAFP, respectively, and obtained 82.49% of biodegradable dissolved organic carbon (BDOC) total removal rate. The result indicated that the advanced treatment under optimized condition would effectively remove the DBPFP contents, and thereby reduced the output of water DBPs and ensured the drinking water safety and its biological stability.

Key words: pre-ozone, post-ozone, O₃-BAC, ozone dosage, disinfection by-products formation potential

摘要：

依托江苏某自来水厂预臭氧+常规处理+臭氧-BAC深度处理示范工程，在浑浊度、TOC、COD_Mn、UV₂₅₄等常规评价指标监测基础上，重点探讨不同臭氧投加量条件下各处理单元对总三卤甲烷生成势（TTHMFP）与总卤乙酸生成势（THAAFP）各类消毒副产物生成势（DBPFP）物质的去除规律与作用机理。结果表明，在预臭氧最佳投加量为1.1 mg·L^-1，后臭氧最佳投加量为1.8 mg·L^-1时，预臭氧和臭氧-BAC深度处理单元对THMFP的去除以三氯甲烷生成势（TCMFP）为主，其去除量分别占TTHMFP去除量的86.8%和60.2%，对HAAFP的去除在预臭氧单元以三氯乙酸生成势（TCAAFP）为主，占THAAFP去除量的77.2%，在O₃-BAC深度处理单元以氯代卤乙酸生成势（Cl-HAAFP）为主，占THAAFP去除量的70.2%。深度处理工艺不同工艺段在最佳臭氧投加剂量下对TTHMFP及THAAFP的平均去除率分别可达21.9%及63.2%，生物可降解溶解性有机碳（BDOC）总去除率达82.49%，说明该优化的深度处理工艺能够较有效地去除DBPFP，保障出水水质生物稳定性。

关键词: 预臭氧, 后臭氧, 臭氧-生物活性炭, 臭氧投加量, 消毒副产物生成势

CLC Number:

TU991.2

YUAN Zhan, JI Hongjun, YU Ran, ZHU Guangcan. Study of ozone dosage via disinfection by-product formation potential controlling in drinking water treatment[J]. CIESC Journal, 2018, 69(6): 2697-2707.

袁展, 吉红军, 余冉, 朱光灿. 饮用水处理工艺中臭氧剂量控制消毒副产物生成势研究[J]. 化工学报, 2018, 69(6): 2697-2707.

References 32

[1]	李世峰. 臭氧-生物活性炭工艺设计中工程方案的选择[J]. 中国给水排水, 2012, 28(20):35-38. LI S F. Selection of engineering scheme in ozone/biological activated carbon process design[J]. China Water & Wastewater, 2012, 28(20):35-38.
[2]	蒋绍阶, 刘宗源. UV254作为水处理中有机物控制指标的意义[J]. 土木建筑与环境工程, 2002, 24(2):61-65. JIANG S J, LIU Z Y. The meaning of UV254 as an organic matter monitoring parameter in water supply & wastewater treatment[J]. Journal of Civil, Architectural & Evironmental Engineering, 2002, 24(2):61-65.
[3]	常颖, 贺涛, 漆文光, 等. 臭氧/生物活性炭工艺的运行优化研究与工程示范[J]. 中国给水排水, 2013, 29(13):1-5. CHANG Y, HE T, QI W G, et al. Demonstration on optimal operation of O3/BAC process[J]. China Water & Wastewater, 2013, 29(13):1-5.
[4]	陈江玲, 陆少鸣. O3-BAC工艺预臭氧投加量优化的中试研究[J]. 水处理技术, 2012, 38(2):101-103. CHEN J L, LU S M. Study on the ozone pre-oxidation dosing quantity optimazation in O3-BAC process[J]. Technology of Water Treatment, 2012, 38(2):101-103.
[5]	孟建斌, 陆少鸣. 臭氧/生物活性炭工艺中主臭氧投加量的优化[J]. 中国给水排水, 2011, 27(21):46-49. MENG J B, LU S M. Optimization of ozone dose in O3/BAC process in drinking water treatment[J]. China Water & Wastewater, 2011, 27(21):46-49.
[6]	邬晓东, 周北海, 袁蓉芳, 等. 臭氧投加量对臭氧/生物活性炭工艺处理水库水影响的中试[J]. 环境科学研究, 2014, 27(4):427-433. WU X D, ZHOU B H, YUAN R F, et al. Pilot-scale study on the impact of ozone dosage on O3/BAC process for advanced treatment reservoir water[J]. Research of Environmental Sciences, 2014, 27(4):427-433.
[7]	孔令宇, 张晓健, 王占生. 臭氧-生物活性炭组合工艺中最佳臭氧投加剂量的确定[J]. 环境科学, 2006, 27(7):1345-1347. KONG L Y, ZHANG X J, WANG Z S. Determination for optimal ozone dose in O3-BAC[J]. Chinese Journal of Environmental Science, 2006, 27(7):1345-1347.
[8]	周云, 梅胜. 给水处理中的臭氧副产物[J]. 中国给水排水, 1999, 15(2):27-28. ZHOU Y, MEI S. Ozonization by-products in drinking water treatment[J]. China Water & Wastewater, 1999, 15(2):27-28.
[9]	王晟, 徐祖信, 王晓昌. 饮用水处理中臭氧-生物活性炭工艺机理[J]. 中国给水排水, 2004, 20(3):33-35. WANG S, XU Z X, WANG X C. Mechanism of ozone/biological activated carbon process in drinking water treatment[J]. China Water & Wastewater, 2004, 20(3):33-35.
[10]	刘卫华, 季民, 杨洁, 等. 高藻水预氧化除藻效能与水质安全性分析[J]. 中国公共卫生, 2005, 21(11):1323-1325. LIU W H, JI M, YANG J, et al. Study on decomposition of pollutants in algae-bloom water and analysis of drinking water safety[J]. Chinese Journal of Public Health, 2005, 21(11):1323-1325.
[11]	张晓健, 李爽. 消毒副产物总致癌风险的首要指标参数——卤乙酸[J]. 给水排水, 2000, 26(8):1-6. ZHANG X J, LI S. Halo-acetic acids as an indicator of the total carcinogentic risk of disinfection by-products[J]. Water & Wastewater Engineering, 2000, 26(8):1-6.
[12]	郝莉鹏, 孙乔, 刘晓琳, 等. 上海市浦东新区饮用水三卤甲烷和卤乙酸含量及其健康风险评价[J]. 环境与职业医学, 2014, 31(6):442-447. HAO L P, SUN Q, LIU X L, et al. Levels and health risk assessment of trihalomethanes and haloacetic acids in drinking water in Pudong New Area, Shanghai[J]. Journal of Environmental & Occupational Medicine, 2014, 31(6):442-447.
[13]	仝重臣, 员建, 苑宏英, 等. 饮用水处理中氯化消毒副产物三卤甲烷和卤代乙酸研究进展[J]. 净水技术, 2012, 31(2):6-11. TONG Z C, YUAN J, YUAN H Y, et al. Advances in research of trihalomethanes and haloacetic acids of chlorination disinfection by-products in drinking water treatment[J]. Water Purification Technology, 2012, 31(2):6-11.
[14]	安东, 乐林生, 宋佳秀, 等. 水体中卤乙酸(HAAs)的产生、测定方法与控制途径[J]. 环境工程学报, 2005, 6(12):18-21. AN D, LE L S, SONG J X, et al. Occurrence, determination and control approach of HAAs in water bodies[J]. Techniques and Equipment for Environmental Pollution Control, 2005, 6(12):18-21.
[15]	于鑫, 张晓键, 王占生. 饮用水生物处理中生物量的脂磷法测定[J]. 给水排水, 2002, 28(5):1-5. YU X, ZHANG X J, WANG Z S. Biomass examination by lipid-P method for drinking water bio treatment[J]. Water & Wastewater Engineering, 2002, 28(5):1-5.
[16]	贺道红, 高乃云, 曾文慧, 等. 臭氧生物活性炭深度处理黄浦江上游原水[J]. 中国给水排水, 2006, 22(1):13-17. HE D H, GAO N Y, ZENG W H, et al. Pilot-scale study on advanced treatment of Huangpu river upper reaches raw water by ozone-BAC[J]. China Water & Wastewater, 2006, 22(1):13-17.
[17]	BLATCHLEY E R, WENG S, AFIFI M Z, et al. Ozone and UV254 radiation for municipal wastewater disinfection[J]. Water Environment Research A Research Publication of the Water Environment Federation, 2012, 84(11):2017-2027.
[18]	郭召海, 杨敏, 张昱, 等. 预臭氧与后臭氧-生物活性炭联用工艺研究[J]. 环境科学, 2005, 26(6):79-83. GUO Z H, YANG M, ZHANG Y, et al. Study on the combination of preozonation and post-ozonation-BAC process for drinking water treatment[J]. Chinese Journal of Environmental Science, 2005, 26(6):79-83.
[19]	张朝晖, 吕锡武. 三卤甲烷在臭氧工艺中的形成与控制[J]. 给水排水, 2007, 33(4):7-10. ZHANG Z H, LÜ X W. Formation and control of trihalomethanes by ozonation[J]. Water & Wastewater Engineering, 2007, 33(4):7-10.
[20]	张强, 刘燕. 臭氧化对水厂水中卤代消毒副产物生成势的影响[J]. 化学通报, 2016, 79(1):88-91. ZHANG Q, LIU Y. Influence of ozonation on chlorinated disinfection by-products formation potential in drinking water[J]. Chemistry, 2016, 79(1):88-91.
[21]	张锁娜, 王海波, 李肖肖, 等. 臭氧对饮用水中氯化消毒副产物生成的影响[J]. 环境工程学报, 2014, 8(10):4091-4096. ZHANG S N, WANG H B, LI X X, et al. Influence of ozonation on formation of chlorination disinfection by-products in drinking water[J]. Chinese Journal of Environmental Engineering, 2014, 8(10):4091-4096.
[22]	NORWOOD D L, JOHNSON J D, CHRISTMAN R F, et al. Reactions of chlorine with selected aromatic models of aquatic humic material[J]. Environmental Science & Technology, 1980, 14(2):e202-e8(7).
[23]	?WIETLIK J, D?BROWSKA A, RACZYK-STANIS?AWIAK U, et al. Reactivity of natural organic matter fractions with chlorine dioxide and ozone[J]. Water Research, 2004, 38(3):547.
[24]	杨宏伟, 王昊宇, 刘云霞, 等. O3-BAC工艺对含溴水体消毒副产物生成势的影响[J]. 清华大学学报(自然科学版), 2014, 54(5):607-612. YANG H W, WANG H Y, LIU Y X, et al. Ozone-biological activated carbon treatment of DBP in high-bromide water[J]. J. Tsinghua Univ. (Sci. & Technol.), 2014, 54(5):607-612.
[25]	杨洁. 臭氧-活性炭工艺中臭氧投加量优化试验研究[D]. 广州:华南理工大学, 2012. YANG J. Study on ozone dosage optimal control in O3-BAC process[D]. Guangzhou:South China University of Technology, 2012.
[26]	李多, 吴立波, 张怡然, 等. 预臭氧化控制饮用水消毒副产物[J]. 工业水处理, 2014, 34(9):15-18. LI D, WU L B, ZHANG Y R, et al. Control of drinking water disinfection by-products by pre-ozonation[J]. Industrial Water Treatment, 2014, 34(9):15-18.
[27]	LAMSAL R, WALSH M E, GAGNON G A. Comparison of advanced oxidation processes for the removal of natural organic matter[J]. Water Research, 2011, 45(10):3263-3269.
[28]	安东, 李伟光, 宋佳秀, 等. 臭氧生物活性炭对三卤甲烷生成势去除效能[J]. 哈尔滨工业大学学报, 2005, 37(11):1489-1491. AN D, LI W G, SONG J X, et al. Removal efficiency of THMFP by biological activated carbon[J]. Journal of Harbin Institute of Technology, 2005, 37(11):1489-1491.
[29]	WERT E C, ROSARIO-ORTIZ F L. Effect of ozonation on trihalomethane and haloacetic acid formation and speciation in a full-scale distribution system[J]. Ozone Science & Engineering, 2011, 33(1):14-22.
[30]	DEFRANCE L, JAFFRIN M Y, GUPTA B, et al. Contribution of various constituents of activated sludge to membrane bioreactor fouling[J]. Bioresource Technology, 2000, 73(2):105-112.
[31]	焦中志, 陈忠林, 李作良, 等. 南方某水源水中天然有机物的特点及氯胺对氯化消毒副产物的控制[J]. 环境工程学报, 2007, 1(12):79-82. JIAO Z Z, CHEN Z L, LI Z L, et al. Characters of natrural organic matters in south water resource and the control of DBPs by chloramine compared with chlorine[J]. Chinese Journal of Environmental Engineering, 2007, 1(12):79-82.
[32]	张领国, 张克峰, 李梅, 等. 饮用水水质生物稳定性研究进展[J]. 净水技术, 2013, 32(6):1-5. ZHANG L G, ZHANG K F, LI M, et al. Advances in research of biological stability for drinking water quality[J]. Water Purification Technology, 2013, 32(6):1-5.