Study on the differences in the remediating effects of different formulations of bacterial agents on black and odorous water bodies and sediments
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摘要:
为探究不同菌剂对黑臭水体的修复效果,揭示研究过程中微生物群落变化规律,采用不同配方菌剂对黑臭水体进行修复,探讨不同菌剂对上覆水、底泥和微生物的影响。结果表明:投加菌剂组上覆水pH均略高于试验前;化学-复合微生物菌剂组上覆水DO浓度略低于空白组(6.95 mg/L),且上覆水NH4 +-N和TP去除率分别达到86.60%和66.07%,底泥酸可挥发性硫和有机质去除率分别达到79.20%和52.71%,去除效果均明显优于其他试验组;高通量测序表明,投加菌剂组底泥中硝化、反硝化细菌和有机质降解类细菌均具有较高相对丰度,且Vicinamibacterales下的某属在化学-复合微生物菌剂组中的相对丰度明显高于其他试验组(1.07%~2.18%)。研究显示化学-复合微生物菌剂对黑臭水体具有良好修复效果。
Abstract:In order to explore the remediation effect of different bacterial agents on black and odorous water bodies, and reveal the changing law of microbial communities during the research process, different formulations of bacterial agents were used to restore black and odorous water bodies, and the effects of different bacterial agents on overlying water, sediment and microorganisms were discussed. The results showed that the pH of the overlying water in the bacterial agent group was slightly higher than that before the experiment. DO concentration in the overlying water of the chemical-composite microbial agent group was slightly lower than that of the blank group (6.95 mg/L), and the removal rates of NH4 +-N and TP in the overlying water reached 86.60% and 66.07%, while the removal rates of volatile sulfur (AVS) and organic matter in the sediment reached 79.20% and 52.71%, respectively. The removal effects were significantly better than other experimental groups. High-throughput sequencing showed that nitrifying bacteria、denitrifying bacteria and organic matter degrading bacteria in the sediment of the microbial inoculum group had high relative abundance, and the relative abundance of a genus under Vicinamibacterales in the chemical-compound microbial inoculum group was significantly higher than that in other experimental groups (1.07%-2.18%). The results of this study indicate that the chemical composite microbial agent has a good remediation effect on black and odorous water bodies.
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表 1 市售菌剂性质
Table 1. List of properties of commercially available microbial agents
分类 菌剂 组成 性状 用途 复合微生物菌剂 菌剂1 复合菌种、营养剂等 黄色固体粉末 用于轻污染水体,提高水体透明度,改善水色,
提升水体自净能力菌剂2 复合菌种、营养剂等 黄色固体粉末 用于黑臭、富营养化等污染严重水体治理,
提高水体自净能力化学-纯微生物菌剂 菌剂3 枯草芽孢杆菌、有机载体、
碳酸钙、蛋白质等黄色固体粉末,活菌数约
1130亿/g用于河道、市政、生活等污水的处理 菌剂4 光合细菌、沸石粉 黄色固体粉末,有效菌
含量约100 cfu/g用于调水净水,增加DO浓度 表 2 上覆水及底泥污染物指标
Table 2. Pollutant indicators of overlying water and sediment
项目 指标 数值 上覆水 pH 7.68~7.83 DO/(mg/L) 7.12~7.97 NH4 +-N/(mg/L) 1.35~1.81 CODCr/(mg/L) 43.33~69.44 TP/(mg/L) 0.51~0.59 底泥 AVS/(mg/kg) 553.59~554.87 有机质/(mg/kg) 9.40~9.53 表 3 试验组中投加的菌剂种类及数量
Table 3. Type and quantity of microbial agents added in the experimental group
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