填料投加对玉米深加工废水处理效果的影响

Influence of Carrier Filling on the Treatment Effect of the Maize Processing Wastewater

向单一活性污泥池内投加填料,分析了填料填充率对玉米深加工废水处理效果的影响。结果显示,随着填料填充率的增加,系统的抗CODCr冲击能力有所增强,当填充率为30%时,进水CODCr平均值为832.7mg/L,相邻2天CODCr变化的平均值为779.6mg/L,即CODCr变化均值超过进水CODCr的94%,CODCr去除率仍稳定在80%以上。填料投加对NH4+-N的去除效果改善较大,当填充率为20%时,NH4+-N去除率较无填料投加提高近50%,达90%;当填充率为30%时,去除率可基本稳定在90%。在试验研究的填料填充率下,填料投加对TN的去除改善不大。另外试验还观察到,污泥膨胀期间填料挂膜速率有加快趋势。

Suspended carriers were filled to single sludge tank. The effects of different filling proportions on the removal of maize processing wastewater were studied. The results showed that the new process could bear higher CODcr volumetric loading shock with the increase of filling proportion. With the filling proportion of 30%, more than 80% CODcr was removed when the average concentration of influent CODcr was 832.7 mg/L and the average change of CODcr was 779.6 mg/L, or with the average shock of more than 94% , in one day. The removal rate of NH4^＋-N was obviously improved by the carrier filling. When the filling proportion was 20% , about 90% NH4^＋ -N could be removed, which was nearly 50% more than that without carrier filling. With the filling proportion of 30%, 90% NH4^＋ -N could be removed stably. The carrier filling had little impact on the remove of TN with the experiment filling proportions. Additionally, it was observed that during the sludge bulking, the period for the biofilm to form on the carrier was shorter than other studies.