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饮用水生物预处理七十年代始于日本。其工作原理是利用附着在滤料表面上的生物膜(由微生物群体组合的粘状物),使水中有机物被吸附、分解氧化,有些还作为生物膜上原生动物的食料。由于生物膜上的生物量很大,即使原水中有机物浓度很低,也能受到有效处理。而且低浓度可生物降解有机物,有利于贫营养菌的生长,这种菌能降解低浓度有机物。另外,由于不断地充气,水在填料中多次往复循环,生物膜不断更新保证其活性,提高了对有机物的去除效果。生物载体的选择将对处理效果和运行成本产生直接影响,本研究选用国内先进的陶粒作为填料,采用生物陶粒滤池对滏
Drinking water biological pretreatment seventies began in Japan. Its working principle is to use the biofilm attached to the surface of the filter media (a combination of microorganisms) to allow organic substances in water to be adsorbed, decomposed and oxidized, and some also act as foodstuffs for protozoa on biofilms. Due to the high biomass on the biofilm, it can be effectively treated even if the concentration of organic matter in raw water is low. And low concentrations of biodegradable organic compounds, is conducive to the growth of oligotrophic bacteria, the bacteria can degrade low concentrations of organic matter. In addition, due to constant aeration, water in the packing repeatedly reciprocating cycle, biofilm constantly updated to ensure its activity, improve the removal of organic matter. The choice of biological carriers will have a direct impact on the treatment effect and the operation cost. In this study, we selected the advanced domestic ceramsite as the filler and the bio-ceramsite filter