粉末活性炭—MBR工艺处理微污染原水

Powdered Activated Carbon-MBR Process for Treatment of Micro-polluted Raw Water

通过静态吸附试验表明 ,粉末活性炭 (PAC)为天然腐殖质类物质饱和后仍可吸附二氯酚 (DCP) ,并在连续运行试验中进一步验证了PAC -MBR抗DCP冲击负荷的能力强于投加普通填料的MBR。通过测定进、出水有机物的表观分子质量分布 ,发现PAC -MBR能有效去除 1～ 4K(1K =10 0 0u)的有机污染物 ,对 4K～ 0 .4 5 μm有机物的去除与PAC的饱和程度有关 ,去除率随运行时间延长而逐渐降低。PAC -MBR和普通填料 -MBR均能有效去除可生物降解有机物 ,前者对可吸附有机物的去除率受PAC饱和程度的影响较大。采用磷脂法可测定PAC上附着的活性微生物量 ,连续运行中PAC -MBR内的微生物量为 0 .6× 10 8个活细胞 mL ,与普通填料 -MBR相当。耗氧速率测定结果表明 ,PAC -MBR内的微生物活性略高于投加普通填料的MBR。

It was indicated by the static adsorption test that even after the natural humus is saturated, powdered activated carbon (PAC) is still able to adsorb dichlorophen (DCP). It was also verified in continuous running test that PAC-MBR has stronger resistance to shock load of DCP than MBR filled with common carries. By means of measuring the distribution of apparent molecular weight of organics both in influent and effluent, it was found that PAC-MBR can effectively remove organics with molecular weight 1～4K (1K=1 000 u), the removal of 4K～ 0.45 μm of organics is affected by the saturation extent of PAC, and the removal rate is gradually lowered along with the operation time. Both PAC-MBR and MBR filled with common carries can effectively remove biodegradable organics, in PAC-MBR the removal of adsorbable organics is more affected by the saturation extent of PAC. Use of phosphatide method can determine the viable biomass absorbed on PAC. In continuous run, the biomass in PAC-MBR had 0.6×10 8 viable cells/mL, which was equivalent to that of MBR filled with common carries. The data of oxygen uptake rate showed that the microbial activity in PAC-MBR is a little higher than that in MBR with common carries.