BAOWen-ting,WANGWei-hong,KANGZeng-yan,et al.Recovery of Aerobic Granular Sludge Activity and Community Evolution in Treatment of Ketchup Wastewater[J].China Water & Wastewater,2024,40(7):98-104.
番茄酱废水好氧颗粒污泥活性恢复及群落演替分析
- Title:
- Recovery of Aerobic Granular Sludge Activity and Community Evolution in Treatment of Ketchup Wastewater
- 摘要:
- 为解决新疆番茄酱加工期间产生的高浓度有机废水带来的环境问题，寻求适应其生产周期的水处理方法，在序批式反应器（SBR）中以人工合成番茄酱废水培养了185 d的好氧颗粒污泥（AGS），经-18 ℃冷冻储存260 d左右后作为接种污泥，进行为期130 d的活性恢复试验。结果显示，颗粒污泥在第13天开始恢复，35 d完全恢复活性，水质变得清澈，最终对COD、NH4+-N、PO43--P的平均去除率分别维持在95%、82%、80%以上。高通量宏基因组测序结果表明，物种的多样性不断变化，均匀性逐渐上升，变形菌门和拟杆菌门之和占比在80%以上，属于优势菌群。浮霉菌门中的一类细菌可以促进短程硝化反硝化，对氮循环及番茄酱加工废水的高效降解具有重要意义。微生物群落的演替表现出的协同或者竞争关系，是活性污泥微生物有效降解有机物的驱动力，对反应体系的稳定性具有重要作用。
- Abstract:
- This paper stored aerobic granular sludge (AGS) cultivated in a sequencing batch reactor (SBR) treating synthetic ketchup wastewater within 185 days at -18 ℃ for 260 days, and then reactivated the stored granules in 130 days, so as to solve the environmental problems caused by high-concentration organic wastewater generated during the processing of ketchup in Xinjiang, and determine the wastewater treatment processes adapted to its production cycle. The granular sludge began to recover on the 13th day, and completely recovered its activity on the 35th day. The effluent became clear, and the average removal rates of COD, NH4+-N and PO43--P eventually maintained at 95%, 82% and more than 80%, respectively. The results of high-throughput metagenomic sequencing showed that the bacterial diversity changed continuously, the uniformity gradually increased, and the total abundance of dominant bacterial phylum Proteobacteria and Bacteroidetes accounted for more than 80%. A group of bacteria in the Planctomycetes promoted partial nitrification and denitrification, which was of great significance for nitrogen circulation and efficient degradation of ketchup processing wastewater. The synergistic or competitive relationship of microbial community evolution was the driving force for the effective degradation of organic matter by microorganisms in activated sludge, and played an important role in the stability of the system.
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