Reduction of organic matter and trihalomethane formation pot

Reduction of organic matter and trihalomethane formation potential in reclai

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再问： Reduction of organic matter and trihalomethane formation potential in reclaimed water from treated industrial estate wastewater by coagulation
再答： 下面是这篇文章的摘要，如果你是环境科学专业的学生，那么你读懂摘要后，就自然知道文章标题的意思了。 它的意思就是，利用絮凝沉淀降低由处理后的工业污水获得的再生水中的有机物和三卤甲烷生成势。 Raw water from treated industrial estate wastewater in northern Thailand was used in jar-test coagulation experiments with variations of separate alum and ferric chloride dosages from 10 to 80 mg/L at pH conditions ranging from 5 to 6.5. Natural organic matter (NOM) surrogates and trihalomethane formation potential (THMFP) were determined to study their reduction. The obtained results showed that total organic carbon (TOC) were gradually reduced from the average value of about 6.1 mg/L to a level of about 4.0 mg/L by alum and ferric chloride dosages of approximately 40 mg/L. Moreover, dissolved organic carbon (DOC) were reduced from an average value of 5.1 mg/L to a level of about 4.0 mg/L by alum and ferric chloride dosages of approximately 40 mg/L. Specific ultraviolet absorption (SUVA) were decreased from an average value of approximately 4.7 L/mg-m to a level of about 2 L/mg-m by alum and ferric chloride dosages of approximately 20 mg/L. In addition, chlorine demands at 1-day reaction were the same as those of 7-day demands with a correlation coefficient of 0.98 (n = 10, correlation significant at the 0.01 level). Interestingly, chloroform of approximately 65 and 60% of total THMFP was found as the predominant THMFP species in treated industrial estate wastewater and reclaimed water, respectively, in comparison with other THM species. Maximum THMFP percentage removal of 25 and 28 by using alum and ferric chloride dosages of about 80 mg/L at pH 5.5 and 5 were obtained, respectively, at the examined conditions.