上海海洋大学学报2024，Vol.33Issue(3)：682-691,10.DOI:10.12024/jsou.20230504191
不同固定化微生物颗粒降解养殖尾水中污染物的性能评价
Selection of immobilized carrier and evaluation of microbe performance of degradation in aquaculture wastewater treatment
摘要
Abstract
Three carriers(Bumpy clay,Carrageenan and Diatomaceous earth)were selected for the preparation of immobilized microbial particles,and the different particle properties,pollutant removal performance and influencing factors were investigated in the present paper.The particle performance studies showed that the mechanical strength of the immobilized particles was high for Bumpy clay and Diatomaceous earth and low for Carrageenan;with nutrient supplementation,Bumpy clay and Carrageenan could stably release 1.50×106 CFU/mL and 2.60×105 CFU/mL of microorganisms,while the release of Diatomaceous earth was poor.According to fitting results of the Monod equation,it could be obtained that the Diatomaceous earth immobilized microbial particles had the largest specific degradation rate(μmax)for CODMn.Carrageenan was comparable to it,and the lowestμmax was observed for Bumpy clay.While the Ks of Diatomaceous earth particles was significantly lower than that of the other two particles.Also,the kinetics of ammonia degradation showed a similar pattern to that of CODMn.The effect of environmental conditions on the degradation performance of the immobilized microbial particles showed that the highest first-order rate constants(k1)for CODMn were found under neutral(pH=7)condition for the three materials.The k1 for ammonia degradation were higher for Bumpy clay and US diatomaceous earth under neutral and alkaline conditions,however the highest rate of ammonia degradation was found for Carrageenan under neutral conditions.The k1 of CODMn and ammonia by immobilized microbial particles increased with the increase of temperature,among which the Bumpy clay was more sensitive to the change of temperature.Except for the Diatomaceous earth particles,the k1 for CODMn degradation by the other two immobilized microorganisms increased significantly(P＜0.05)with the increase of the initial concentration of the pollutant.There was no significant difference in the k1of CODMn at different aeration intensities(P＞0.05),and higher aeration intensity was beneficial to the degradation of ammonia.关键词
养殖尾水/固定化微生物/固定化载体/环境条件Key words
aquaculture wastewater/immobilized microorganism/immobilized carrier/environmental conditions分类
资源环境引用本文复制引用
杜胜男,徐佳楠,熊飞,蔡徐依,葛朋彪,张六六,李娟英..不同固定化微生物颗粒降解养殖尾水中污染物的性能评价[J].上海海洋大学学报,2024,33(3):682-691,10.基金项目
上海市水生野生动植物保护研究中心项目(D-8006-23-0228) （D-8006-23-0228）
上海市科委长三角构建区域创新共同体领域项目(21002410500) （21002410500）
上海市农业科技创新项目(2023-02-08-00-12-F04579) （2023-02-08-00-12-F04579）
