新型活性炭固定化产品的制备及其处理焦化废水的特性
Preparation of novel activated carbon immobilized products and their performance in coking wastewater treatment
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摘要: 为解决优势菌种工程应用，研究不同固定化方法、载体和结构的固定化产品对焦化废水的降解特性。用活性炭粉末吸附菌种后，与聚乙烯醇和海藻酸钠混合制备了新型固定化球；用聚乙烯醇和海藻酸钠包埋吸附菌种的活性炭纤维毡，与立体弹性塑料填料连用，制备出3种不同形状的活性炭纤维膜片固定化产品复合填料。将游离菌和制备的4种活性炭固定化产品投入A/A/O工艺系统平行实验，考察处理焦化废水的效果。结果表明，活性炭纤维膜片固定化产品复合填料对焦化废水的降解能力优于其他固定化产品：缺氧池出水硝酸盐氮和亚硝酸盐氮浓度分别稳定在1.96 mg/L和0.49 mg/L，未产生氮的累积现象，COD去除率可达到60.92%。好氧池COD和氨氮降解效率分别为78.83%和85.52%，苯酚、氰化物降解效率均为97%以上。Abstract: In order to solve the dominant bacteria engineering applications, some of immobilized products prepared using different immobilization processes, microbial carriers and immobilization structures were studied to investigate degradation characteristics of coking wastewater. The new type of immobilization ball material was prepared by mixing bacteria adsorbed into active carbon powder, polyvinyl alcohol and alginate. Three different shapes of immobilization composite fillers were prepared using active carbon fiber felt adsorbed with bacteria and embedded by polyvinyl alcohol and alginate, with elastic plastic filler. The four different immobilization products were used to investigate treatment efficiency of coking wastewater in a parallel experiment of A/A/O process. The results showed that active carbon fiber film immobilization product had a better performance than other products. The effluent concentrations of nitric nitrogen and nitritenitrogen from anoxic tank were 1.96 mg/L and 0.49 mg/L, respectively, and the COD removal efficiency was 60.92%. The removal efficiencies of COD and ammonia in aerobic tank were 78.83% and 85.52%,and phenol and cyanide removal efficiencies were both more than 97%.
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Key words:
- activated carbon fiber /
- immobilization /
- coking wastewater /
- denitrification
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