提供生物稳定饮用水的最佳工艺

研究由预处理、常规处理和深度处理组合而成的 7种不同工艺对饮用水源水中可生物同化有机碳 ( AOC)的去除效果 .试验表明 :生物陶粒预处理对 AOC具有较高的去除率 ,达到 45%左右 ,如果在它之前先经过预臭氧化 ,生物处理的去除率可增大到 58.4% ;常规处理对 AOC的去除非常有限 ,去除率平均在 2 0 %左右 ;新活性炭单元因其吸附作用对 AOC的去除效果稳定在30 %左右 ,如和臭氧氧化连用 ,去除效果能提高到 50 %以上 ;包括了常规处理、生物预处理、预臭氧和臭氧活性炭的组合工艺对AOC的去除效果最好 ,达到 86% .因此臭氧氧化、生物炭和生物处理是提高饮用水生物稳定性的重要手段 ,并以本试验结果为依据提出了对于不同的水源水所采用的最佳工艺 .

The Optimal Process Providing Biologically Stable Drinking Water

Removal efficiency of AOC in drinking water source by seven different kinds of processes composed of pre treatment,conventional treatment or advanced treatment were studied in this paper.Results showed that the pre treatment of biological ceramic had a high removal of AOC,AOC was reduced about 45% after biodegradation and 58 4% when pre ozonation preceded biological treatment;conventional treatment resulted in an about 20% limited decrease in AOC;removal of AOC was steadily about 30% becasue of the adsorption of the new active carbon and enhanced to above 50% when active carbon plus post ozonation;combined processes including conventional treatment,biological pre treatment,pre ozonation and biological active carbon had the best removal efficiency of AOC by 86%.So,ozonation,biological active carbon and biological treatment were the important ways to improve the biostability of drinking water.The optimal processes aimed at different water sources were put forwad based on this test.