Review on purification effect of microalgae on pollutants in breeding wastewater
In view of the high concentration of conventional pollutants in breeding wastewater,including heavy metals,antibiotics,hormones,and other toxic and harmful pollutants,microalgae transformation technology has shown great potential.In order to explore the effect,mechanism,and influencing factors of microalgae treatment of breeding wastewater,this paper summarized the removal effect and removal mechanism of microalgae on the main pollutants in breeding wastewater,analyzed the different influencing factors on the treatment effect of microalgae on breeding wastewater,and focused on the mechanism of microalgae and the removal efficiency of pollutants during different treatment process.The results showed that microalgae can remove conventional pollutants such as carbon,nitrogen,and phosphorus,from breeding wastewater through photosynthesis and assimilation and can remove heavy metals,antibiotics,suspended solids,hormones,and pathogenic bacteria through a series of biological processes.Meanwhile,the removal effect of microalgae on pollutants was restricted by the algae species type,inoculation concentration,temperature,light,and wastewater properties.Multi-algae coordination and immobilization treatment both improved the removal ability of microalgae,and algal bacteria symbiosis technology could make microalgae and bacteria mutually symbiosis,which could achieve the purpose of more efficient removal of pollutants.In summary,microalgae has great potential in the treatment of breeding wastewater,and optimal environmental conditions and appropriate treatment technology should be considered during the actual treatment process,so as to construct an efficient microalgae breeding wastewater purification system.