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针对近岸海域水体及滨海城市水体有一定盐度的特点,研究了人工渗流系统对该类含盐水体的脱氮除磷效能。结果表明,在盐度分别为0、0.5%和3.0%的条件下,系统对TN的去除率分别为93.48%、89.56%、77.24%,出水TN的质量浓度分别为0.36、0.59、1.31 mg/L;TP去除率分别为65.19%、36.03%、53.07%,出水TP的质量浓度分别为0.33、0.6、0.44 mg/L。低盐度下系统脱氮效果所受抑制作用较小,高盐度下所受抑制作用较显著。由于离子竞争吸附作用,故系统除磷效果受到抑制作用。系统脱氮作用主要发生在第1格室,树皮填料为微生物的附着生长提供有利环境,且可释放碳源而不会污染水质;除磷作用主要靠第2格室水泥砖块的吸附沉淀作用。脱氮与除磷在空间上的分离使系统运行控制更为便利。
In view of the salinity characteristics of the coastal and coastal waters, the effects of artificial seepage system on nitrogen and phosphorus removal were studied. The results showed that the removal rates of TN were 93.48%, 89.56% and 77.24% respectively when the salinity was 0, 0.5% and 3.0%, respectively. The TN concentrations in effluent were 0.36, 0.59 and 1.31 mg / L and TP removal rates were 65.19%, 36.03% and 53.07%, respectively. The effluent TP concentrations were 0.33, 0.6 and 0.44 mg / L, respectively. Under low salinity, the denitrification effect of the system was less inhibited, and the inhibition was more significant under high salinity. Due to ion competition adsorption, so the system of phosphorus removal is inhibited. System denitrification occurs mainly in cell 1, and bark filler provides an advantageous environment for the attachment and growth of microorganisms, and can release carbon source without polluting water quality. Phosphorus removal mainly depends on adsorption and sedimentation of the second grid cell cement bricks effect. Denitrification and phosphorus removal in the spatial separation of the system operation and control more convenient.