Effect of Ozonation on Microorganism in the Biological Activated Carbon and Disinfection By-Products in the Effluent

被引：1

作者：

Liu B.-M. ^{[1
]}

Wang X.-X. ^{[1
]}

Zhang X.-X. ^{[1
]}

Gu Y.-F. ^{[1
]}

Li Y.-P. ^{[1
]}

Ruan W.-Q. ^{[1
,2
,3
]}

Miao H.-F. ^{[1
,3
,4
]}

Pan Y. ^{[4
]}

机构：

[1] School of Environmental and Civil Engineering, Jiangnan University, Wuxi

[2] Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi

[3] Jiangsu Engineering Laboratory of Biomass Energy and Carbon Reduction Technology, Wuxi

[4] Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou

来源：

Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 01期

关键词：

Biological activated carbon (BAC); Disinfection by-products; Dissolved organic matter; Microorganism; Ozone;

D O I：

10.13227/j.hjkx.201907102

中图分类号：

学科分类号：

摘要：

This study was carried out in the ozone (O3) and biological activated carbon (BAC) section of a drinking water plant to investigate the effects of O3 on microbial and effluent disinfection by-products (DBPs) in BAC during drinking water treatment. The water quality, dissolved organic matter (DOM) characteristics, microbial activity, and DBPs formation at different O3 concentrations were analyzed. Results showed that the effect of O3 on microorganisms is mainly that it increased the utilization efficiency of DOM. However, excessive O3 increased the amount of organic matter such as protein and microbial metabolites (SMPs) in the effluent. When the O3 concentration increased from 0 mg•L-1 to 2.0 mg•L-1, the survival rate of microorganisms in the BAC decreased from 95.10% to 62.60%. However, since O3 transforms organic matter into a biodegradable substance, we found that microbial activity increased by 62.52% and that the biofiltration of the BAC was enhanced. When the O3 concentration was further increased to 4.0 mg•L-1, the microbial survival rate decreased to 49.9% and the protein and SMPs produced by the microorganisms increased. This resulted in an increased formation of carbon-containing DBPs (C-DBPs) and nitrogen-containing DBPs (N-DBPs) by 41.93% and 7.18%, respectively. In summary, an appropriate dosage of O3 was beneficial for removing DOM by O3-BAC, but we found that an excessive O3 concentration caused the formation of new DBPs precursors. © 2020, Science Press. All right reserved.

引用

页码：253 / 261

页数：8

共 36 条

[1]

Chen F, Peldszus S, Elhadidy A M, Et al., Kinetics of natural organic matter (NOM) removal during drinking water biofiltration using different NOM characterization approaches, Water Research, 104, pp. 361-370, (2016)

[2]

Chen C, Hu W R, Zhang Q., Treating micro-polluted Yellow River water with joint process of ozone preoxidation-direct filtration and biological active filter, Water Purification Technology, 23, 1, pp. 10-12, (2004)

[3]

Lan Y Q, Liu R, Ma Z J, Et al., Ozone-biological activated carbon for advanced removal of typical persistent organic pollutants from micro-polluted source water in the Yangtze Delta region, Environmental Science, 39, 12, pp. 5541-5549, (2018)

[4]

Fu J, Lee W N, Coleman C, Et al., Removal of pharmaceuticals and personal care products by two-stage biofiltration for drinking water treatment, Science of the Total Environment, 664, pp. 240-248, (2019)

[5]

Dong B Z, Zhang J L, He C., Influencing factors of assimilable organic carbon (AOC) formation in drinking water during ozonation process, Environmental Science, 37, 5, pp. 1837-1844, (2016)

[6]

Delatolla R, Seguin C, Springthorpe S, Et al., Disinfection byproduct formation during biofiltration cycle: Implications for drinking water production, Chemosphere, 136, pp. 190-197, (2015)

[7]

Liu C, Olivares C I, Pinto A J, Et al., The control of disinfection byproducts and their precursors in biologically active filtration processes, Water Research, 124, pp. 630-653, (2017)

[8]

Liao X B, Zou R S, Chen C, Et al., Evaluating the biosafety of conventional and O<sub>3</sub>-BAC process and its relationship with NOM characteristics, Environmental Technology, 39, 2, pp. 221-230, (2017)

[9]

Chu W H, Gao N Y, Yin D Q, Et al., Ozone-biological activated carbon integrated treatment for removal of precursors of halogenated nitrogenous disinfection by-products, Chemosphere, 86, 11, pp. 1087-1091, (2012)

[10]

Ou T Y, Wang G S., Comparative study on DBPs formation profiles of intermediate organics from hydroxyl radicals oxidation of microbial cells, Chemosphere, 150, pp. 109-115, (2016)

← 1 2 3 4 →