湿地植物-沉积物微生物燃料电池产电及河流底泥修复

发布时间：2018-05-17 16:37

本文选题：湿地植物 + 沉积物微生物燃料电池　；参考：《环境工程学报》2017年06期

【摘要】：以受污染的城市河涌底泥为底质,湿地植物选用风车草(Clinopodium Urticifolium)或短叶茳芏(Cyperus Malaccensis),构建了湿地植物-沉积物微生物燃料电池(P-SMFC)及无植物的沉积物微生物燃料电池(SMFC)共3个电极处理组,研究了P-SMFC与SMFC的产电特性,并探讨了它们与对照组中底泥及上覆水中氮磷的迁移转化规律。结果表明,产电方面,在系统启动运行的7个月内,PSM1、SM和PSM2三个电极处理组均能维持较稳定的产电,输出电压在整个运行阶段总体稳定在0.30~0.50 V,且植物的引入提升了系统的产电性能。底泥修复方面,设置的5个处理组对底泥中有机质均有一定的降解作用,表现出PSM1、SM和PSM2处理组有机质的降解要显著高于PS1和PS2处理组,P-SMFC系统对底泥有机物的去除有显著的促进作用;系统中系统运行前2个月,2个P-SMFC处理组氨氮含量显著低于其他3个处理组,之后随着运行时间的延长,各处理组之间的变化差异性不大,5个处理组底泥中氨氮去除率均达到80%以上;电极的引入对底泥中硝氮的去除没有产生显著影响;各处理组底泥中总磷去除率不同,分别为PSM1处理组8.67%、SM处理组8.89%、PSM2处理组7.33%、PS1处理组12.45%、PS2处理组8.89%,产电过程抑制了磷的迁移,有助于底泥中磷的稳定。
[Abstract]:Three electrode treatment groups, P-SMFC) and non-vegetated sediment microbial fuel cell (P-SMFC) and non-vegetated sediment microbial fuel cell (SMFC), were constructed for wetland plants by using polluted urban river bottom mud as the sediment sludge, and the wetland plants selected Clinopodium Urticifolium) or Cyperus Malaccensis. The electrical characteristics of P-SMFC and SMFC were studied, and the transport and transformation of nitrogen and phosphorus in sediment and overlying water between them and the control group were discussed. The results showed that the three electrode groups, PSM1SM and PSM2, could maintain stable power generation within 7 months after the system was started. The output voltage is stable at 0.30V 0.50V in the whole operation stage, and the introduction of plants improves the electrical performance of the system. In the area of sediment remediation, the organic matter in the sediment was degraded by the five treatment groups. The results showed that the degradation of organic matter in PSM1SM and PSM2 treatments was significantly higher than that in PS1 and PS2 groups. The ammonia nitrogen content of the two P-SMFC treatment groups was significantly lower than that of the other three treatment groups 2 months before the system running, and then with the extension of the running time, There was no significant difference among the treatment groups, the removal rate of ammonia nitrogen in the sediment of the five treatment groups was above 80%, the removal rate of nitrate nitrogen in the sediment was not significantly affected by the introduction of electrode, and the removal rate of total phosphorus in the sediment of each treatment group was different. PSM1 treatment group 8.67 and SM treatment group 8.89 and PSM2 treatment group 7.33 and PS1 treatment group 12.45 and PS2 treatment group 8.89.The electricity production process inhibited phosphorus migration and contributed to the stability of phosphorus in the sediment.
【作者单位】：华南理工大学环境与能源学院;环境保护部华南环境科学研究所;
【基金】：广州市科技计划项目(2014J4100020) 国家自然科学基金资助项目(51272482)
【分类号】：TM911.45;X52

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