污水处理运行模式对好氧颗粒污泥特性的影响  

Effect of Sewage Treatment Operation Mode on Characteristics of Aerobic Granular Sludge

作　　者：张瑞环 袁林江[1] 陈希 ZHANG Ruihuan;YUAN LinJiang;CHEN Xi(Key Laboratory of Environmental Engineering,Shaanxi Province,Key Laboratory of Northwest Water Resources,Environmental and Ecology,Ministry of Education,School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,710055;School of City Planning and Municipal Engineering,Xi’an Polytechnic University,710048,Xi'an,China)

机构地区：[1]陕西省环境重点实验室,西北水资源环境与生态重点实验室,西安建筑科技大学环境与市政工程学院,710055 [2]西安工程大学城市规划与市政工程学院,陕西西安710048

出　　处：《水处理技术》2021年第2期106-111,共6页Technology of Water Treatment

基　　金：国家自然科学基金(50878180)。

摘　　要：研究了运行模式的改变对好氧颗粒污泥优势丝状菌种类,以及对污泥特性所产生的影响。结果表明,序批式活性污泥法反应器(SBR)中出现大量外伸型丝状菌Type 021N,但并未阻碍污泥的颗粒化,且随着絮体污泥颗粒化进程的推进,其对污泥沉降性的影响也在逐步减小,最终得到平均粒径为0.75 mm、污泥容积指数为43 mL/g的成熟好氧颗粒污泥。而将成熟颗粒污泥接种至连续流反应器中时,颗粒污泥开始解体,污泥特性开始恶化,同时优势丝状菌演替为另一种外伸型丝状菌Sphaerotilus Natans。分析认为,外伸型丝状菌会影响污泥在生物区与沉淀池间的循环周期及其在沉淀池的实际停留时间,是颗粒污泥解体的主要原因,而该影响在SBR运行模式下较小,在连续流态下较大。The effect operation mode changes on the dominant filamentous bacteria of aerobic granular sludge and the sludge characteristics were studied.The results showed that a large number of extended filamentous bacteria Type 021 N appeared in the sequencing batch activated sludge reactor(SBR),but it did not hinder the granulation of sludge,and with the progress of the granulation process of floc sludge,its influence on sludge sedimentation gradually decreased,and finally the mature aerobic granular sludge with mean particle size of 0.75 mm and SVI of 43 mL/g was obtained.However,when the mature granular sludge was inoculated into the continuous flow reactor,the granular sludge began to disintegrate and the characteristics of the sludge began to deteriorate.At the same time,the dominant filamentous bacteria was successively transformed into another type of exogenous filamentous bacteria sphaerogenic Natans.Analysis suggested that,overhang type of filamentous bacteria could affect the sludge in the biological area and settling basin between the cycle and its actual residence time in the sedimentation tank was the main reason for the disintegration of granular sludge,the influence was smaller in SBR operation mode and larger in continuous flow mode.

关 键 词：好氧颗粒污泥 丝状菌 稳定性 序批式活性污泥法反应器 连续流反应器 

分 类 号：X703.1[环境科学与工程—环境工程]