控制BNR工艺厌氧释磷效果因素的实验研究

以实验室动态生物营养物去除(BNR)工艺--BCFS(Biologiseh Chemisehe Fosfaat Stikstof Verwijdefing)运行实验为基础,采用静态实验方法,研究了初始COD、碳源种类和厌氧释磷反应时间对厌氧释磷效果的影响.实验结果表明.初始COD越高.释磷速率和总释磷量越高.当碳源充足且反应时间足够长时.释磷速率不受初始COD和碳源种类影响,单位质量污泥(vSs)的VFAs利用率只要维持在0.04 g·h-1(3 h内)即可获得满意的释磷效果.以葡萄糖为碳源时,经过3 h厌氧反应的释磷量低于乙酸与丙酸2种碳源;与丙酸相比,在相同初始COD下乙酸最终诱发的释磷量虽然不及丙酸,但在3 h内诱发相同的释磷量乙酸所需要的反应时间仅为丙酸的1/2.

Experimental study on factors controlling anaerobic P-release

Anaerobic P-release directly controls the total effect of bio-P removal in biological nutrient removal (BNR) processes. Based on a lab-scale BNR process (BCFS), batch experiments were applied to study the effects of initial COD concentrations, carbon sources and HRT on anaerobic P-release. The results from batch experiments indicate that P-release increased with increasing influent COD. The average rates of P-release were not affected by initial COD concentrations if the anaerobic HRT was sufficient. The P-release effect was good as long as the rate of uptake of volatile fatty acids (VFAs) per unit of sludge (VSS) was above 0.04 g·h-1. With glucose used as carbon source, anaerobic P-release within 3 h was less than with acetate and propionate. The final amount of P released in the presence of acetate was lower than that released with propionate, but the reaction time (HRT) required to reach the same amount of P-release within 3 h with acetate was half of that required with propionate.