摘要
为提高曝气生物滤池处理效率、研发新型具有结构和功能优势的颗粒填料,采用间歇式完全混合循环流态化反应器,探究了自制复合颗粒A、自制复合颗粒B、中劲陶粒及石英砂颗粒填料在4个水力停留时间下的挂膜性能、动力学参数及生物膜活性等生物膜特性,建立了生物膜微生物动力学参数实验测定的新方法。结果表明:当水力停留时间为8~12 h时,自制复合颗粒A、B挂膜性能优于石英砂和中劲陶粒,生物膜增殖速率分别为95.83、63.75 mg·(L·h)^(-1)(以COD去除率标准评价)和54.13、29.23 mg·(L·h)^(-1)(以氨氮降解率标准评价);装填复合颗粒A的完全混合循环流态化反应器氨氮降解效率最高,相应生物膜表观产率系数最低,剩余污泥量最少;当水力停留时间超过8 h后,复合颗粒附着生长生物膜的脱氢酶活性、表面蛋白质、多糖含量最高。由此可知,以自制复合颗粒A、B为颗粒填料能优化曝气生物滤池的处理效率。本研究结果可为新型生物滤池技术的发展提供参考。
In order to improve the treatment efficiency of biological aerated filter,the new granular fillers with structural and functional advantages were developed.A fully mixed circulating fluidized batch reactor was used to study the film hanging properties,kinetic parameters and biofilm activity of self-made composite particles A and B,ceramsite and quartz sand at four hydraulic residence times.A new method for the experimental determination of microbial kinetic parameters of biofilm was established,then the kinetics of ammonia degradation and microbial proliferation were studied.The results showed that when the hydraulic retention time was 8~12 h,the film hanging performance of the self-made composite particles A and B was better than that of quartz sand and ceramite,the proliferation rates of biofilm on them were 95.83 mg·(L·h)^(−1)and 63.75 mg·(L·h)^(−1)(as COD removal rate),54.13 and 29.23 mg·(L·h)^(−1)(as ammonia nitrogen degradation rate),respectively.The fully mixed circulation fluidized reactor loaded with composite particle A had the highest ammonia nitrogen degradation efficiency,the lowest apparent yield coefficient of the corresponding biofilm,and the least amount of excessive sludge.When the hydraulic retention time exceeded 8 h,the dehydrogenase activity,surface protein and polysaccharide contents of the growing biofilm attached on composite particles were the highest.In conclusion,the treatment efficiency of biological aerated filter can be optimized by using self-made composite particles A and B as particle fillers.The results of this study can provide a reference for the development of the novel biological filter technology.
作者
郭小境
吴军
彭浩
马海涛
高林燕
吕宜廉
寿文琪
潘周志
陈轶凡
苏子龙
余书瑶
宋立杰
GUO Xiaojing;WU Jun;PENG Hao;MA Haitao;GAO Linyan;LYU Yilian;SHOU Wenqi;PAN Zhouzhi;CHEN Yifan;SU Zilong;YU Shuyao;SONG Lijie(State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Nanjing University,Nanjing 210023,China;Shanghai Environment Sanitation Engineering Design Institute,Shanghai 200030,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第5期1651-1661,共11页
Chinese Journal of Environmental Engineering
基金
国家重点研发计划“固废资源化”重点专项(2018YFC1901404)
国家自然科学基金面上项目(51878337)。
关键词
粉煤灰基颗粒填料
生物膜特性
挂膜
动力学参数
fly ash-based granular filler
biofilm properties
film hanging
kinetic parameters
