铝盐混凝剂强化絮状厌氧氨氧化污泥颗粒化研究  

Aluminum Salt Coagulant Improves Granular of Anammox Sludge

作　　者：刁思圆 宫徽 况前 鲁波 陶本森 戴晓虎[2] DIAO Siyuan;GONG Hui;KUANG Qian;LU Bo;TAO Bensen;DAI Xiaohu(School of Environmental and Chemical Engineering,Shanghai Electric Power University,Shanghai 200090,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200090,China;Chongqing Environment&Sanitation Group,Chongqing 400000,China)

机构地区：[1]上海电力大学环境与化学工程学院,上海200090 [2]同济大学环境科学与工程学院,上海200090 [3]重庆市环卫集团,重庆400000

出　　处：《水处理技术》2023年第6期79-83,共5页Technology of Water Treatment

基　　金：国家自然科学基金(52000140);重庆环卫-同济大学校企合作研究课题(ⅢD002)。

摘　　要：探究不同剂量铝盐混凝剂(聚合氯化铝)对厌氧氨氧化污泥颗粒化的影响。采用经过筛分的絮状厌氧氨氧化污泥作为种泥(粒径小于0.425 mm),设置空白组和实验组,实验组在2、4、8 mg/L铝盐投加量下开展序批式反应器的厌氧氨氧化污泥颗粒化研究。具体分析厌氧氨氧化污泥颗粒化过程中沉降性能、脱氮性能、污泥粒径变化和微生物群落特征。实验结果表明,经过110天的富集培养,铝盐混凝剂的投加提升了厌氧氨氧化污泥粒径。与空白组相比,投加铝盐混凝剂促进厌氧氨氧化污泥平均粒径增长了209.8μm,同时改善了污泥沉降性能,污泥沉降比和污泥体积指数出现一定降低。微生物群落分析结果表明,投加铝盐后拟杆菌门相对丰度增加了7.8%,浮霉菌门相对丰度降低了9.8%。其中,厌氧氨氧化优势菌属Candidatus Kuenenia相对丰度降低了8.9%,但并没有影响系统脱氮活性。两组反应器最终容积脱氮负荷差异不大,稳定在0.6 kgN/(m^(3)·d)左右。本研究初步探究了利用铝盐混凝剂强化厌氧氨氧化污泥颗粒化的效果。The influence of different concentrations of aluminum salt coagulant(polymeric aluminum chloride)on the granulation of anaerobic ammonia oxidation sludge was examined.The long-term operation experiments were carried out in a sequencing batch reactor using sieved anaerobic ammonia-oxidized sludge with a particle size of less than 0.425 mm as seed sludge.The long-term operation experiments were carried out at 2 mg/L,4 mg/L,and 8 mg/L aluminum salt doses,respectively,which analyzed the settling performance,denitrification performance,and microbial community characteristics during anaerobic ammonia utilization.Simultaneously,molecular biology was employed to demonstrate the structural changes in the sludge microbial population during the granulation process and their influence on denitrification.The findings of the experiment revealed that after 110 days of enrichment culture.Aluminum salt coagulant dosage increased the particle size of anaerobic ammonia oxidized sludge.Adding aluminum coagulant raised the average particle size of anaerobic ammonia sludge by 209.8μm compared to the control group,which decreased the sludge settling ratio and sludge volume index.After adding aluminum salts,the relative abundance of the Bacteroidota grew by 7.8%,whereas the relative abundance of the Planctomycetota declined by 9.8%.Among these,the relative abundance of the anaerobic ammonia-oxidizing dominating genus Candidatus Kuenenia was reduced by 8.9%,although this genus did not affect the system's denitrification activity.The ultimate volumetric denitrification load of the two reactor groups did not differ considerably and remained steady at around 0.6 kgN/(m^(3)·d).The impact of improved anaerobic ammonia oxidation sludge granulation employing aluminum salt coagulant was originally examined in this work.

关 键 词：聚合氯化铝 厌氧氨氧化 颗粒污泥 粒径分布 微生物群落结构 

分 类 号：X52[环境科学与工程—环境工程]