论文

固定化菌藻共生系统对农村灰水的处理效能

  • 刘元坤 ,
  • 王志维 ,
  • 于海宽
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  • 1. 北京工业大学城市建设学部, 北京 100124;
    2. 中国人民武装警察部队后勤学院, 天津 300309
刘元坤,副教授,研究方向为水污染控制,电子信箱:liuyuankun@bjut.edu.cn

收稿日期: 2023-05-17

  修回日期: 2024-02-08

  网络出版日期: 2025-01-15

基金资助

国家重点研发计划项目(2018YFD1100501)

Treatment efficiency of immobilized algal-bacterial symbiotic system on rural gray water

  • LIU Yuankun ,
  • WANG Zhiwei ,
  • YU Haikuan
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  • 1. Faculty of Urban Construction, Beijing University of Technology, Beijing 100124, China;
    2. Logistics University of People's Armed Police Force, Tianjin 300309, China

Received date: 2023-05-17

  Revised date: 2024-02-08

  Online published: 2025-01-15

摘要

研究了游离态和固定态2种情况下,菌藻单一和共生处理下小球藻-活性污泥系统的生物活性和污染物去除效果,分析了不同情况下微生物种群变化规律。试验结果表明,在无曝气条件下,小球藻的光合作用能够为系统补充一定的溶解氧,固定化小球藻-活性污泥系统对模拟农村灰水中污染物的去除效果最好(化学需氧量的去除率为87.5%±2.89%;氨氮为65.34±2.0%;总磷为60.4%±4.29%;阴离子表面活性剂(lnear alkylbenzene sulfonates,LAS)为91.07%±2.04%),处理效果优于菌或藻的单一固定系统和游离态菌藻系统,生物积累量较其他试验组有显著性增长(p<0.05),活性污泥和小球藻共生效应明显。在半连续运行试验中,固定化菌藻共生系统表现出了更强的污染物去除稳定性,固定态的单位细胞叶绿素含量和混合液悬浮固体浓度(mixed liquor suspended solids,MLSS)积累量分别是悬浮态的1.6和1.5倍,固定态情况下生物生长情况良好。固定态情况下,门水平的菌群在实验前后保留更多相同门类,放线菌门(Actinobacteria)在2个试验组中的变化趋势不同;实验过程中,LAS对菌属有较明显的富集作用,对硝化菌的活性抑制强烈,表明水中氮的去除和小球藻的生物活动有较强关联。

本文引用格式

刘元坤 , 王志维 , 于海宽 . 固定化菌藻共生系统对农村灰水的处理效能[J]. 科技导报, 2024 , 42(24) : 115 -127 . DOI: 10.3981/j.issn.1000-7857.2023.05.00760

Abstract

Gray water is a kind of domestic sewage with light extent of pollution, and rural grey water accounts for 60%~70% of rural domestic sewage. If it is properly used, the situation of rural water shortage will be greatly improved. algal-bacterial symbiosis system is a potentially efficient and economical treatment for rural gray water. In this study, the feasibility of practical application of this method was demonstrated by studying the biological activity and pollutant removal effect of single or symbiotic Chlorella-activated sludge system under free and immobilized states, and the variation rule of microbial growth under different conditions was analyzed. The experimental results show that, in the condition of no aeration, the photosynthesis of Chlorella can supply a certain amount of Dissolved Oxygen (DO) to the system, and the immobilized Chlorella-activated sludge system showed the best removal effect on the pollutants in simulated rural gray water (the removal rate of chemical oxygen demand 87.5%±2.89%; Ammonia nitrogen 65.34%±2.0%; Total Phosphorus (TP) 60.4%±4.29%; Linear Alklybezene Sulfonates (LAS) 91.07%±2.04%). The treatment effect was better than that of single fixed system and free system of bacteria or algae, and the biomass increased significantly compared with other experimental groups (p<0.05). The symbiotic effect between activated sludge and Chlorella was obvious. In the semi-continuous operation test, the immobilized algal-bacterial symbiosis system showed better pollutant removal stability. The unit cell chlorophyll content and Mixed Liquor Suspended Solids (MLSS) accumulation in the immobilized state were 1.6 and 1.5 times of that in the suspended state, respectively, and the biological growth was good in the immobilized state. In the immobilized state, the phylum flora retained more of the same category before and after the experiment, while the changing trend of Actinobacteria in the two experimental groups was different. During the experiment, LAS showed obvious enrichment of bacteria and strong inhibition of nitrobacteria activity, indicating that nitrogen removal in water was closely related to the biological activities of Chlorella.

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