Preozonation on Removal of Organic Matter in Water and Biological Stability
The pollution of drinking water source has become a serious problem facing the world, and it is even more severe in China undergoing rapid development. Statistics show that the total annual emissions in China is 35.3 billion m3, CODMn is about 760 million tons, the treatment rate is only 23.6%, a lot of waste water without being treated in many small towns was discharged directly . It polluted seriously the water supply in many cities and industrial and mining water. According to the survey, among China's seven major river systems, 110 Key Sections, 68% of Water Quality is Ⅲ, Ⅳ, Ⅴ Grade. 90% of the national urban water has been polluted, the most prominent problem is the organic pollution. There are low dissolved oxygen, and the density of ammonia nitrogen, COD, BOD, and TOC in the water is high. Some of the polluted water bodies often appear black smelly serious situation. These organic polluted drinking water source, due to the presence of a large number of organic ozone-depleting substances , by conventional coagulation, sedimentation, filtration and disinfection treatment process, is difficult to achieve the requirements of the national mandatory Standard— "drinking water health standards"(GB 5749-2006) , issued and revised by the national standards committee and Ministry of Health, which there is a new comprehensive index of organic matter - the oxygen consumption is to control trace organic matter in water.
Chaohe Chen, Yong Huang and Guangfan Li
H. Z. Zhang et al., "Preozonation on Removal of Organic Matter in Water and Biological Stability", Advanced Materials Research, Vols. 243-249, pp. 4868-4873, 2011