丘陵地区有大量简单的垃圾填埋场,先前的研究结果表明,垃圾填埋场中的污染物可以通过互流传播并引起面源污染。在先前的研究中开发的混合活性污泥-膜曝气生物反应器(H-MABR)可用于处理具有低化学需氧量(COD)/总氮(TN)比的互流,它在实验室模拟中被证明是有效的。为了研究H-MABR在实际应用中处理垃圾填埋场周围的互流的有效性,在垃圾填埋场对H-MABR操作的有效性进行了现场中试评估。结果表明,对COD的去除效果,TN,H-MABR流入的氨氮为87.1±6.0%,80.9±7.9%,和97.9±1.4%,分别。TN去除率达到148.6~205.6g·N/m3·d。出水各污染物浓度均符合中国《城市生活垃圾填埋场污染控制标准》(GB16889-2008),“其中COD,TN,出水氨氮应小于100mg/L,40mg/L,和25毫克/升,分别。基于16SrRNA基因测序的群落组成分析和PICRUSt分析结果表明,内环和外环之间存在不同的优势功能细菌,但是参与硝化反硝化的功能基因,同化硝酸盐还原,和异化硝酸盐还原途径均被检测到。此外,除了亚硝酸盐氧化基因narg,其丰度在内环和外环之间没有显着差异,外环中其他功能基因的丰度高于内环。一项经济评估表明,H-MABR进行汇流排处理的运行成本低至2.78日元/m3;因此,H-MABR是一种抗冲击负荷和成本有效的技术,用于互流处理。
There are a large number of simple landfills in hilly areas, and the results of previous studies have shown that pollutants in landfills can spread via interflow and cause surface source pollution. The hybrid activated sludge-membrane aerated bioreactor (H-MABR) developed in a previous study can be used for the treatment of interflow with a low chemical oxygen demand (COD)/total nitrogen (TN) ratio, and it has been shown to be effective in laboratory simulations. To investigate the effectiveness of the H-MABR in treating interflow around landfills in real-world applications, an in-situ pilot-scale evaluation of the effectiveness of H-MABR operation was conducted at a landfill. The results indicated that the removal efficiencies of COD, TN, and ammonia nitrogen in interflow by H-MABR were 87.1 ± 6.0%, 80.9 ± 7.9%, and 97.9 ± 1.4%, respectively. The removal rate of TN reached 148.6-205.6 g-N/m3·d. The concentration of each pollutant in the effluent was in accordance with China\'s \"Standard for pollution control on the landfill site of municipal solid waste (GB16889-2008),\" wherein the COD, TN, and ammonia nitrogen of effluent should be less than 100 mg/L, 40 mg/L, and 25 mg/L, respectively. The results of community composition analysis and PICRUSt analysis based on 16S rRNA gene sequencing showed that there were different dominant functional bacteria between the inner and outer rings, but functional genes involved in the nitrification-denitrification, assimilated nitrate reduction, and dissimilated nitrate reduction pathway were all detected. Furthermore, except for the nitrite oxidation gene narG, the abundance of which did not significantly differ between the inner and outer rings, the abundance of the other functional genes was higher in the outer ring than in the inner ring. An economic evaluation revealed that the operation cost of interflow treatment by the H-MABR was as low as ¥2.78/m3; thus, the H-MABR is a shock-load-resistant and cost-effective technology for interflow treatment.