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Characterization of a novel micro-pressure double-cycle reactor for low temperature municipal wastewater treatment
Environmental Technology ( IF 2.8 ) Pub Date : 2021-09-09 , DOI: 10.1080/09593330.2021.1972169
Shengshu Ai 1, 2 , Linzhu Du 1, 2 , Zebing Nie 2, 3 , Wenai Liu 1, 2 , Hua Kang 1, 2 , Fan Wang 1, 2 , Dejun Bian 1, 2
Affiliation  

ABSTRACT

To solve the deterioration of effluent caused by low temperature in urban sewage treatment plant in cold areas, a new type of reactor was proposed, the biochemical environmental and low-temperature operating characteristics of the reactor were studied. Through analysis of flow simulation and dissolved oxygen (DO) distribution when the aeration rate was 0.6 m3/h, it showed that there were many different DO environments in the reactor at the same time, which provided favourable conditions for various biochemical reactions. The operation test showed that the average effluent removal rate of COD, TN, NH4+-N and TP was 92.53%, 74.57%, 89.61% and 96.04%, respectively. And there were a variety of functional bacteria related to nitrogen and phosphorus removal in the system, most of them with strong adaptability at low temperatures. Among the dominant microorganisms, Flavobacterium and Rhodobacter were related to denitrification, Aeromonas and Thiothrix were related to phosphorous removal. Denitrifying phosphorus removal was the main way of phosphorus removal. Picrust2 results showed that the reactor operated well at low temperature, and the regional difference distribution of nitrification genes further confirmed the existence of functional zones in the reactor. The results showed that the Micro-pressure Double-cycle reactor worked well at low temperature, which provided a new idea and way for the upgrading of urban sewage treatment plants in cold areas.



中文翻译:

用于低温市政污水处理的新型微压双循环反应器的表征

摘要

为解决寒冷地区城市污水处理厂因低温导致出水变质的问题,提出了一种新型反应器,研究了该反应器的生化环境和低温运行特性。通过对曝气速率为0.6 m 3 /h时的流动模拟和溶解氧(DO)分布分析表明,反应器内同时存在多种不同的DO环境,为各种生化反应提供了有利条件。运行试验表明,出水COD、TN、NH 4 +的平均去除率-N和TP分别为92.53%、74.57%、89.61%和96.04%。并且系统中存在多种与脱氮除磷相关的功能菌,其中大部分具有较强的低温适应性。优势微生物中,黄杆菌属和杆菌属与反硝化作用有关,气单胞菌属硫丝菌属与除磷有关。反硝化除磷是主要的除磷方式。Picrust2结果表明反应器在低温下运行良好,硝化基因的区域差异分布进一步证实了反应器中功能区的存在。结果表明,微压双循环反应器低温运行良好,为寒冷地区城市污水处理厂升级改造提供了新的思路和途径。

更新日期:2021-09-09
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