Environmental Technology ( IF 2.8 ) Pub Date : 2020-02-28 , DOI: 10.1080/09593330.2020.1732474 Mladen Popov 1 , Marijana Kragulj Isakovski 2 , Jelena Molnar Jazić 2 , Aleksandra Tubić 2 , Malcolm Watson 2 , Marina Šćiban 3 , Jasmina Agbaba 2
ABSTRACT
This paper investigates the fate of natural organic matter (NOM) during the full-scale drinking water treatment plant supplied by Danube river bank filtration. After the recent reconstruction of the plant, special attention was devoted to the effects of ozone dose and granulated activated carbon (GAC) filtration on the formation and behaviour of oxidation by-products (carbonyl compounds and bromate), as well as carbonaceous and nitrogenous chlorination by-products. For the oxidation of aromatic NOM moieties that absorb light at UV254, a lower ozone dose (1.0 g O3/m3) is sufficient, whereas to achieve a measurable reduction (about 20%) of total organic carbon, an ozone dose of 1.5 g O3/m3 is required. The content of carbonyl compounds in the water after ozonation increases relative to the content before oxidation treatment, and is up to 12 times higher in the case of aldehydes and up to 2 times higher in the case of carboxylic acids. Seasonal variations, including changes in temperature and the amount of precipitation, were also shown to affect the content of organic matter in the raw water, with slight effects on the quality of the treated water. In the winter, the organic matter content is slightly higher, meaning their transformation products aldehydes and carboxylic acids, are also higher during the winter than the summer.
中文翻译:
大型饮用水处理厂天然有机物和氧化/消毒副产物形成的归宿
摘要
本文研究了多瑙河河岸过滤提供的全规模饮用水处理厂中天然有机物 (NOM) 的归宿。在最近的工厂重建之后,特别关注臭氧剂量和颗粒活性炭 (GAC) 过滤对氧化副产物(羰基化合物和溴酸盐)的形成和行为以及碳和含氮氯化的影响副产品。对于在 UV 254处吸收光的芳族 NOM 部分的氧化,较低的臭氧剂量(1.0 g O 3 /m 3)就足够了,而要实现总有机碳的可测量减少(约 20%),臭氧剂量为1.5 克 O 3 /m 3是必须的。臭氧化后水中羰基化合物的含量相对于氧化处理前的含量有所增加,醛类的含量高达 12 倍,羧酸的含量高达 2 倍。季节性变化,包括温度和降水量的变化,也被证明会影响原水中有机物的含量,对处理后的水质量有轻微影响。冬季有机物含量略高,即其转化产物醛类和羧酸类,冬季也高于夏季。