农村污水处理菌剂的复配及其对污染物的去除效果
首发时间:2023-05-12
摘要:通过在农村污水生物处理过程中投加复合菌剂,可以借助微生物协同作用,改善污染物处理效果。由于该方法具有成本低、安全可靠、简单可行等特点,在农村地区正广泛受到关注。本研究选用6种功能菌种,基于正交试验设计9种复合菌剂(命名为A-1、A-2、A-3、B-1、B-2、B-3、C-1、C-2和C-3),优选复配比例和曝气条件。结果显示,实验组的污染物去除效果优于对照组,且总体上随着曝气时间的延长,污染物去除率逐渐升高。经24 h处理,C-3(恶臭假单胞菌:枯草芽孢杆菌:地衣芽孢杆菌:解淀粉芽孢杆菌:中间苍白杆菌:甲基营养型芽孢杆菌 = 3:1.5:1.5:1:1:0.5)对化学需氧量(COD)、总氮(TN)和氨氮(NH??-N)的去除率最高,分别为39、13和46%;在120 h后,污染物最大去除率分别达56、32和53%。综合考虑技术和经济两方面因素,在接种浓度2.3×10^4cfu/mL时,C-3为最佳复合菌剂,曝气条件为"曝气1 h停止1 h"。
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Compound of bacteria agent for rural sewage treatment and its removal effect on pollutants
Abstract:Though adding compound bacterial agent to the biological treatment for rural sewage, the removal effects of pollutants could be improved by the synergistic effect of microorganisms. With the characteristics of low-cost, safe and reliable, simple and feasible, this treatment method is attracting a lot of attention in rural area. In this study, 6 strains with special functions were selected to design 9 compound bacteria agents (named A-1, A-2, A-3, B-1, B-2, B-3, C-1, C-2 and C-3) based on orthogonal experiment, and the combination ratio and aeration condition were optimized, respectively. Results showed that the pollutant removal efficiency of the experimental group was better than that of the control and generally increased with the increasing proportion of aeration time. At 24 h, the removal rates of chemical oxygen demand (COD), total nitrogen (TN) and ammonia nitrogen (NH??-N) for C-3 (Pseudomonas putida: Bacillus subtilis: Bacillus licheniformis: Bacillus amyloliquefaciens: Ochrobactrum intermedium: Bacillus methylotrophicus at 3:1.5:1.5:1:1:0.5) were the highest among all compound bacteria agents, which were 39, 13 and 46%, respectively, while the maximum removal rates of above pollutants could reach 56, 32 and 53% after 120 h. Considering both technical and economic factors, C-3 was selected as the best compound bacterial agent. The inoculation concentration was 2.3×10^4cfu/mL, and the aeration condition was set with aeration 1 h and non-aeration 1 h.
Keywords: environmental engineering compound bacteria agent rural sewage pollutants removal effects
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