【作者】 刘建红；

【导师】 张肇铭；

【作者基本信息】 山西大学 ， 环境科学， 2004， 硕士

【摘要】 垃圾填埋场渗滤液（渗沥液）有机污染物成份复杂，COD_cr和BOD₅含量高，NH₃-N高达5000mg/L以上，重金属含量是普通污水的3～10倍。本文用混凝吸附的方法对北京市六里屯垃圾填埋场渗滤液作了预处理。在预处理过程中首先对渗滤液进行混凝，采用浓度为200mg/L的FeCl₃作为混凝剂，并与硫酸铝混凝剂的混凝效果作了对比，同时用CaO作为肋沉剂。实验表明FeCl₃的混凝效果优于硫酸铝。然后再用10％的活性炭作为吸附剂，经预处理过的渗滤液的出水COD_cr的去除率为30％，NH₃-N的去除率为21.0％，BOD₅的去除率为28.6％。 对光合细菌混合培养物进行了固定化，研究了聚已烯醇（PVA）、海藻酸钠作为固定化细胞包埋剂的不同性能比较。结果表明，9％PVA能有效地固定光合细菌细胞，并能使固定化细胞保持较高的生理活性，同时确定了最适的固定化条件与参数。 最后采用固定化光合细菌-SBR法对垃圾渗滤液进行了后续生物处理，并筛选出了最佳工艺组合。在水力停留时间为72小时，COD_cr进水浓度为8308mg/L，BOD₅进水浓度为2504mg/L，NH₃-N的进水浓度为1446mg/L时，硫化物的进水浓度为8.0mg/L时，采用固定化光合细菌混合培养物-SBR法工艺处理后，垃圾滲滤液的COD_cr的去除率为82.6％，NH₃-N的去除率为98.6％，BOD₅的去除率为79.7％，硫化物的去除率为97.5％。更多还原

【Abstract】 City refuse landfill site percolate contains a complex organic pollutant component. It is high in CODcr & BOD5 and NH3-N is exceed 5000mg/L in most cases, so dose the heavy metal content, which is often 3-10times more than common sewage. Percolate sampled in liulitun city refuse landfill site of Beijing is pretreated by using coagulation, and. absorption In that process, we use 200mg/L FeCl3 as coagulant, whose effect is better than ALt(SO4)3 by comparison. CaO is also used as sedimentation aid reagent and 1.0% active carbon as sorbent The effect shows that CODcr removal rate of pretreated percolate is 30%, NH3-N removal rate is 21. 0% and BOD 5removal rate is 28. 6%.Mixed culture then is immobilized and different performance by using Polyvinyl alcohol(PVA) and Sodium aljinate as embedding medium is also studied. The result shows that 9%PVA can immobilize the Photosynthetic bacteria effectively, keeping relatively high physiological activity. Next, the optimum immobilization condition and parameters are determined.Finally the percolate is treated organically by using immobilized PSB-SBR method; we also choose the best operation and condition combination. The result shows that when water settle time is 72hours, CODcr input concentration is 8308mg/L, BOD5 input concentration is 2504mg/L, NH3-Ninput concentration is 1446mg/mL, sulfide input concentration is 8.0mg/mL, percolate CODcr removal rate is 82.6%, NH3-Nremoval rate is 98.6%, BOD5 removal rate is 79. 7% and removal sulfide rate is 97. 5% by using SBR.更多还原