[1]胡小兵,宋维维,王振振,等.离体悬浮生物膜特性的演变规律[J].中国给水排水,2024,40(11):95-102.
　HUXiao-bing,SONGWei-wei,WANGZhen-zhen,et al.Evolution of Isolated Suspended Biofilm Properties[J].China Water & Wastewater,2024,40(11):95-102.
点击复制

离体悬浮生物膜特性的演变规律

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第11期 页码: 95-102 栏目: 出版日期: 2024-06-01
Title:
Evolution of Isolated Suspended Biofilm Properties
作者:
胡小兵1,2， 宋维维1， 王振振1， 沈翼军1,2， 刘浩宇1， 李晶晶1， 汪坤1
（1.安徽工业大学 建筑工程学院，安徽 马鞍山 243002；2.生物膜法水质净化及利用技术教育部工程研究中心，安徽 马鞍山 243032）
Author(s):
HU　Xiao-bing1，2， SONG　Wei-wei1， WANG　Zhen-zhen1， SHEN　Yi-jun1，2， LIU　Hao-yu1， LI　Jing-jing1， WANG　Kun1
（1. College of Architectural Engineering， Anhui University of Technology， Ma’anshan 243002， China； 2. Engineering Research Center of Biofilm Water Purification and Utilization Technology， Ma’anshan 243032， China）
关键词:
悬浮生物膜;  生物膜演变;  絮体结构;  胞外聚合物(EPS)
Keywords:
suspended biofilm;  biofilm evolution;  floc structure;  extracellular polymer substances (EPS)
摘要:
为探索生物膜演变规律，将载体表面成熟生物膜剥离置于反应器中培养35 d，分别从絮体微观形态结构（当量直径Deq、孔隙率Po、规则度Re、长径比AR）、生物膜理化特征（生物量MLSS、胞外聚合物EPS、SVI）和废水处理性能三个方面考察纯培养离体悬浮生物膜的形态演变特征。结果表明，随着培养时间的延长，生物膜发生裂解变成较多的小絮体，其当量直径不断降低，孔隙率、规则度波动上升，长径比变化不明显。生物膜的生物量整体呈上升趋势，培养后期，MLSS、MLVSS及MLVSS/MLSS（f）分别达到最大值7.68 mg/mL、6.91 mg/mL和0.92。SVI呈波动上升趋势。EPS呈“先减后增”的变化趋势，培养后期总EPS（Tol-EPS）达到98.19 mg/g。运行后期，对COD、NH4+-N、TP的平均去除率分别达到（81.98±2.51）%、（89.86±13.67）%和（85.81±9.57）%。总之，离体悬浮生物膜培养后期，其性能指标与活性污泥接近，生物膜演变为活性污泥。
Abstract:
The mature biofilm on the carrier surface was stripped and cultured in a reactor for 35 days to investigate the evolution of biofilm into activated sludge. The morphological characteristics of pure cultured suspended biofilm were investigated from three aspects: floc microstructure (equivalent diameter, porosity, regularity and aspect ratio), physicochemical properties of biofilm (MLSS, EPS and SVI), and wastewater treatment performance. With the extension of culture time, the biofilm disintegrated into more flocs, leading to a decrease in its equivalent diameter, fluctuation up in porosity and regularity, while the aspect ratio remained relatively unchanged. The biomass concentration of the biofilm exhibited an overall upward trend, with MLSS, MLVSS, and MLVSS/MLSS (f) peaking at 7.68 mg/mL, 6.91 mg/mL, and 0.92 respectively during the later stage of cultivation. The SVI demonstrated a fluctuating upward trajectory. The EPS exhibited a trend of initial decrease followed by an increase, with total EPS (Tol?EPS) reaching 98.19 mg/g in the late stage of cultivation. The average removal rates of COD, NH4+-N and TP reached (81.98±2.51)%, (89.86±13.67)% and (85.81±9.57)%, respectively. In conclusion, during the later stage of suspended biofilm culture, its performance indicators closely resembled those of activated sludge, indicating the evolution of the biofilm into activated sludge.
更新日期/Last Update: 2024-06-01