摘要
针对小球藻-菌剂体系,分析了光强、菌藻比和初始氨氮浓度对去除氨氮效果的影响,通过响应面分析优化了参数,探讨了氨氮去除途径和藻菌共生机理。结果表明:在光照强度为4000 lux、菌藻比为3∶1、初始氨氮浓度为50 mg·L^(-1)的条件下,氨氮去除率达到最高值(94.92%);氨氮去除效果影响因素的主次关系为光照强度>初始氨氮浓度>菌藻比;在光强为4700 lux、菌藻比为3∶1、初始氨氮浓度为56 mg·L^(-1)的最佳参数条件下,氨氮去除率实测值与与预测值分别为87.96%和87.31%;当氨氮浓度较低时,微藻和细菌在该体系中对氨氮去除的贡献率分别为75.86%和17.50%;细菌保持了体系pH的平衡,EPS作为藻菌互利共生的关键介质维持着体系的良性循环;与微藻互利共生的关键菌属可以在体系中保持相对稳定。
The effects of light intensity,bacteria to algae ratio,and initial ammonia nitrogen concentration on the removal of ammonia nitrogen were investigated in the Chlorella-bacteria agent system.The parameters were optimized by response surface analysis.The pathway of NH_(3)-N removal and the mechanism of algae-bacteria symbiosis mechanism were discussed.The results showed that when the light intensity was 4000 lux,the bacteria-to-algae ratio was 3∶1 and the initial ammonia concentration was 50 mg·L^(-1),the ammonia removal(%)reached the highest(94.92%).The factors ranked from high influence to low influence on the removal of ammonia nitrogen was light intensity>initial ammonia nitrogen concentration>bacteria to algae ratio.Under the optimal parameters of light intensity of 4700 lux,bacteria algae ratio of 3∶1 and initial ammonia nitrogen concentration of 50 mg·L^(-1),the measured and predicted ammonia nitrogen removal(%)were 87.96%and 87.31%,respectively.When the ammonia nitrogen concentration was 50 mg·L^(-1),the microalgae and the bacteria contributed 75.86%and 17.50%of ammonia nitrogen removal,respectively.The bacteria maintained the pH balance of the system and the EPS,as a key medium for the mutual beneficial symbiosis of algae and bacteria,maintained the virtuous cycle of the system.The key bacteria genera which was mutually beneficial symbiosis with microalgae could maintain relative stable in the system.
作者
郑思米
魏群
马湘蒙
陈如歌
袁思涵
黄宇菲
李淑媛
ZHENG Simi;WEI Qun;MA Xiangmeng;CHEN Ruge;YUAN Sihan;HUANG Yufei;LI Shuyuan(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China)
出处
《能源环境保护》
2022年第4期44-53,共10页
Energy Environmental Protection
基金
广西重点研发计划项目(桂科AB1850006)。
关键词
小球藻-菌剂
影响因素
响应面
机理
Chlorella-bacterial agent
Influence factor
Response surface
Mechanism
