光照强度对菌藻共生系统处理海产养殖废水的性能影响及微生物群落变化  

Effect of Light Intensity on Performance of Bacteria-Algae Symbiosis System for Mariculture Wastewater Treatment and Variation of Microflora

作　　者：李盈盈 周璐 荣宏伟[1] 鲁锰业 王竞茵 崔佰慧 郭大滨 LI Yingying;ZHOU Lu;RONG Hongwei;LU Mengye;WANG Jingyin;CUI Baihui;GUO Dabin(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《净水技术》2023年第8期117-130,共14页Water Purification Technology

基　　金：国家自然科学基金(52170071);广东省自然科学基金(2022A1515011909);大学生创新创业训练计划项目(s202211078208)。

摘　　要：试验采用悬浮态菌藻共生系统,探究光照强度对菌藻共生系统海产养殖废水处理的性能影响。试验结果表明,当光照强度为4500 lux时,处理效果最好,COD_(Cr)去除率为96.87%,TN去除率为95.70%,PO^(3-)_(4)-P的去除率为94.34%,磺胺甲恶唑(SMX)的去除率为95.67%。各污染物主要在有光照的条件下被去除,黑暗期间的去除率较低。过高和过低的光照强度均对微藻和细菌的生长代谢产生抑制作用,二者活性和相互作用下降,影响胞外聚合物(EPS)的分泌量。光照强度对菌藻共生系统的微生物群落造成显著差异。过高的光照强度会降低微生物群落的丰富度和多样性,系统中的细菌逐渐转变为耐光性更强的细菌,同时反硝化细菌和SMX降解菌的丰度明显降低,但是会提高抑制藻华的菌属丰度。In this study,the effect of light intensity on the performance of mariculture wastewater treatment by a suspended-state bacterial-algal symbiosis system was investigated.The experimental results showed that the best treatment effect was achieved when the light intensity was 4500 lux,with the removal efficiency of CODCr of 96.87%,TN of 95.70%,PO3-4-P of 94.34%and SMX of 95.67%.All pollutants were removed mainly in the presence of light,and the removal rate was lower during darkness.Both too high and too low light intensities inhibited the growth and metabolism of microalgae and bacteria,reducing the activity of both,thus decreasing the exchange of substances and signals and affecting the amount of extracellular polymeric substances(EPS)secretion.Light intensity caused significant variation in microflora of the bacterial-algal symbiotic system.Excessive light intensity would reduce and change the abundance and diversity of microflora,leading to gradual conversion of bacteria in the system to more light-tolerant bacteria.In addition,the abundance of denitrifying bacteria and SMX-degrading bacteria was significantly reduced,but the abundance of algal bloom-inhibiting genera was increased.

关 键 词：菌藻共生系统 海产养殖废水 光照强度 脱氮除磷 磺胺甲恶唑(SMX) 微生物群落 

分 类 号：X703[环境科学与工程—环境工程]