摘要
对预臭氧、臭氧一生物活性炭等技术与常规水处理工艺联用中有机物去除效果、消毒副产物THMFP的消除等进行了研究。结果表明：采用适量臭氧（如1mg／L）预氧化，可有效提高混凝过程中有机物去除率；THMFP从常规处理的116μg／L降至78#g／L（1mg／LO3）。与预臭氧强化混凝联用的臭氧-生物活性炭工艺能进一步降低DOC和THMFP。研究发现：溴酸盐随着臭氧含量呈现起伏变化，溴酸盐相关前驱物不易分离去除。两次臭氧投加（预臭氧和主臭氧）均导致溴酸盐、AOC和甲醛升高；其含量可分别在后续的混凝过滤及生物活性炭过程中得到控制，仅AOC含量较原水和常规工艺出水有所升高。
This paper studied the organic and DBPs （disinfenction by-products） removal and the ozone related by-products in the preozonation, ozonation-BAC （biological activated carbon） and their combination with conventional treatment. Results showed that preozonation in proper dosage （e. g. 1mg/L） would improve organic matter removal during coagulation and filtration markedly. THMFP was decreased from 116 μg/L to 78μg/L. The optimized control treatment （OCT） combined with preozonation, coagulation, settlement, filtration and major ozonation-BAC decreased DOC and THMFP further. It was found that the concentrations of bromate were changed according to the dosages of ozone in waters; and the precursors were not ready to be removed by separations such as coagulation, settlement and filtration. Preozonation and major ozonation both resulted in increased concentrations of formaldehyde, bromate and AOC. They could be controlled effectively by following treatment such as coagulation, filtration, and BAC, besides a moderate increase of AOC compared with conventional treatment.
出处
《给水排水》
CSCD
北大核心
2010年第9期138-142,共5页
Water & Wastewater Engineering
基金
太原市科技局战略性新兴产业培育专项项目(2010)
关键词
臭氧
混凝
消毒副产物
安全性
Ozonation
Coagulation
Disinfection by-products
Safety
