Variation of Disinfection By-Products Formation Potential Species at Several Stages of Drinking Water Treatment Plants

2013 ◽  
Vol 777 ◽  
pp. 337-340
Author(s):  
Qiang Zhang ◽  
Bin Liu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Biological Activated Carbon ◽  
Formation Potential ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
Microbial Products ◽  
Water Plants ◽  
By Products

The variation of disinfection by-products (DBPs) at several stages of drinking water treatment plants was investigated in two drinking water plants. The results clearly indicate that the low molecular weight total organic carbon (TOC) which has been identified as primary precursor for chlorinated DBPs was difficult to remove by coagulation. Plant A which used conventional coagulation/sedimentation could not decrease the species of trihalomethanes (THMs) and haloacetic acids (HAAs) formation potential. Biological activated carbon (BAC) was applied in Plant B which removed the maximum amount of TOC, while more kinds of microbial products were produced in BAC unit which could be the potential precursors of DBPs. Therefore, the species of DBPs formation potential still increased in the treatment processes of Plant B. Because different components of organic precursors produced different DBPs species, the processes of Plant B could decrease TOC efficiently but the species of THMs and HAAs formation potential.

scholarly journals Occurrence of 25 pharmaceuticals in Taihu Lake and their removal from two urban drinking water treatment plants and a constructed wetland

2017 ◽  
Vol 24 (17) ◽  
pp. 14889-14902 ◽  
Author(s):  
Xia-Lin Hu ◽  
Yi-Fan Bao ◽  
Jun-Jian Hu ◽  
You-Yu Liu ◽  
Da-Qiang Yin
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Constructed Wetland ◽  
Taihu Lake ◽  
Drinking Water Treatment ◽  
Low Flow ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
Detection Frequency ◽  
High Detection

Abstract Pharmaceuticals in drinking water sources have raised significant concerns due to their persistent input and potential human health risks. The seasonal occurrence of 25 pharmaceuticals including 23 antibiotics, paracetamol (PAR), and carbamazepine (CMZ) in Taihu Lake was investigated; meanwhile, the distribution and removal of these pharmaceuticals in two drinking water treatment plants (DWTPs) and a constructed wetland were evaluated. A high detection frequency (>70%) in the Taihu Lake was observed for nearly all the 25 pharmaceutics. Chlortetracycline (234.7 ng L−1), chloramphenicol (27.1 ng L−1), erythromycin (72.6 ng L−1), PAR (71.7 ng L−1), and CMZP (23.6 ng L−1) are compounds with both a high detection frequency (100%) and the highest concentrations, suggesting their wide use in the Taihu Basin. Higher concentrations of chloramphenicols, macrolides, PAR, and CMZP were observed in dry season than in wet season, probably due to the low flow conditions of the lake in winter and the properties of pharmaceuticals. The overall contamination levels of antibiotic pharmaceutics (0.2–74.9 ng L−1) in the Taihu Lake were lower than or comparable to those reported worldwide. However, for nonantibiotic pharmaceutics, PAR (45.0 ng L−1) and CMZP (14.5 ng L−1), significantly higher concentrations were observed in the Taihu Lake than at a global scale. High detection frequencies of 25 pharmaceuticals were observed in both the two DWTPs (100%) and the wetland (>60%) except for florfenicol and sulfapyridine. The removal efficacies of the studied pharmaceuticals in DWTP B with advanced treatment processes including ozonation and granular activated carbon filtration (16.7–100%) were superior to DWTP A with conventional treatment processes (2.9–100%), except for sulfonamides. Wetland C with the constructed root channel technology was efficient (24.2–100%) for removing most pharmaceuticals. This work suggests that the application of cost-effective technologies such as constructed wetlands should be considered as an efficient alternative for removing pharmaceuticals from water supply sources.

scholarly journals Geosmin and 2-MIB Removal by Full-Scale Drinking Water Treatment Processes in the Republic of Korea

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 628
Author(s):  
Keug Tae Kim ◽  
Yong-Gyun Park
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Large Scale ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Optimal Operation ◽  
Republic Of Korea ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
The Republic

Due to climate change, population growth, industrialization, urbanization, and water contamination, it is becoming more difficult to secure and supply clean and safe drinking water. One of the challenges many water utilities often face is the taste and odor (T&O) problem in drinking water treatment plants, mostly associated with geosmin and 2-MIB. These representative T&O compounds are mainly produced by the metabolism of blue-green algae (cyanobacteria), especially in summer. In this study, the correlation between algae blooms and T&O compounds was identified in the intake and raw water of a large-scale water treatment plant in the Republic of Korea. The removal efficiency of geosmin and 2-MIB by each treatment process was intensively evaluated. According to the obtained results, ozonation and granular activated carbon (GAC) adsorption were more effective for removing the troublesome compounds compared to other water treatment processes, such as coagulation/flocculation, filtration, and chlorination. Because of their seasonal concentration variation and different removal rates, optimal operation methods need to be developed and implemented for drinking water treatment plants to solve the T&O problems.

Removal of viruses and disinfection by-products at two drinking water treatment plants in southern China

2012 ◽  
Vol 48 (1-3) ◽  
pp. 221-231 ◽  
Author(s):  
Qiang Zhang ◽  
Yan Liu ◽  
Yuanyuan Wei ◽  
Zhexue Quan ◽  
Yun Zhang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Southern China ◽  
Drinking Water Treatment ◽  
Water Treatment Plants ◽  
By Products

Formation of chlorination by-products in drinking water treatment plants using breakpoint chlorination

2019 ◽  
Vol 149 ◽  
pp. 104008 ◽  
Author(s):  
Dávid Stefán ◽  
Norbert Erdélyi ◽  
Bálint Izsák ◽  
Gyula Záray ◽  
Márta Vargha
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Water Treatment Plants ◽  
By Products

Removal of disinfection by‐products and their precursors during drinking water treatment processes

2019 ◽  
Vol 92 (5) ◽  
pp. 698-705 ◽  
Author(s):  
Qiufeng Lin ◽  
Feilong Dong ◽  
Yunxia Miao ◽  
Cong Li ◽  
Weicheng Fei
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
By Products
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