生物膜法除磷工艺及机理研究

试验结果表明 ,软性载体生物膜序批式工艺是行之有效的除磷工艺。该工艺除磷适合的载体装填密度为30 % ,水力停留时间为 9h ,其中厌氧 3h、好氧 6h。进水CODCr负荷从 0 2 7kg m3·d～ 1 32kg m3·d均可使除磷率达90 %以上 ,并可承受较高的CODCr负荷的增大。试验中 ,还就除磷的各影响因素做了系统地探讨。通过 2 ,4 二硝基苯酚的抑制实验 ,证实了生物除磷机理的观点 ,亦即 ,生物膜序批式反应器中磷的去除是由微生物的新陈代谢完成的

PROCESS AND MECHANISM STUDIES ON REMOVAL OF PHOSPHORUS IN BIOFILM PRO- CESS

The result of this study showed that the sequencing batch reactor of submerged biofilm process with fibrous carriers is very effective in phosphorus removal by means of proper arrangements and operation of the reactor.The suitable applied carriers package percentage was 30%,and the hydraulic retention time was 9 h which included 3 h in anaerobic reaction section and 6 h in aerobic reaction section.When the influent COD Cr loading rate increased from 0.27 kg COD Cr /m 3·d to 1.32 kg COD Cr /m 3·d,the phosphorus removal efficiency reached over 90%,and this process can withstand higher increase of COD Cr loading rates.The factors that affect the phosphours removal are discussed in detail in the paper.The mechanism of biological phosphours removal was confirmed by DNP inhibition experiment,and it was also found that the phosphours removal in the SBR of submerged biofilm process was completed by metabolism of microorganism.