Author(s): Long Meng; Wang Zhenhua; Gao Wei; Song Ke Zheng; Hu Yanping; Wang Yiwei
Linked Author(s):
Keywords: The Water Cleanser™ bio-wax; Eutrophic water; Nutritive salt; In-situ purification
Abstract: The Water Cleanser™ bio-wax (hereinafter referred to as ‘bio-wax’) has micro-capillary structure and slow-release microbial promoting factor function, which can effectively stimulate the reproduction and growth of indigenous beneficial bacteria in water. However, due to the different types and content of microorganisms and nutrient concentration in natural water bodies, the differences in the treatment effects and mechanisms of biological wax application are still unclear. In this study, the effects of bio-wax on nitrogen removal, phosphorus fixation and algal inhibition in different environments were investigated through a 3-month enclosure test. The results of enclosure test showed that in the range of 0.2-2.0mg /L total nitrogen and 0.2-0.4mg /L total phosphorus, the microbial biomass supported by bio-wax increased by 54.5% with the increase of initial nitrogen and phosphorus concentration. At the same time, the reduction rates of total nitrogen, ammonia nitrogen and COD increased by 14.8%, 10.8% and 12.9%, respectively. Compared with the control group, bio-wax could reduce the cyanobacteria biomass by 32.5% to 55.6%. In water with different N and P concentrations, the reduction rate of cyanobacteria decreased by 23.1% with the increase of initial N and P concentrations. The results of this study could provide scientific basis and technical support for the treatment of eutrophic water by bio-wax.
Year: 2024