Reuse of power plant pollution sources in the cultivation of thermophilic cyanobacteria PKUAC-SCT E542

Abstract

The growth of hermophilic cyanobacteria Thermosynechococcus elongatus PKUAC-SCT E542 was not inhibited when the leachate from the flue fly ash of waste incineration plant was added to the culture of cyanobacteria, and the growth of cyanobacteria was not inhibited. Some elements in the BG-11 medium could be used with smoke Dow fly ash leachate was replaced, and the growth rate was increased by 6% to 12% compared with the use of BG-11 medium. In addition, combining the use of fly ash leachate and simulated flue gas to replace Na2CO3 in the microalgae culture system as the sole carbon source, the growth of cyanobacteria was still active, and there was no significant difference compared to BG-11. After 4 days of cultivation, the biomass yield was 0.805 ± 0.05 g/L and 0.751 ± 0.02 g/L, achieving a higher biomass accumulation efficiency, and realizing the feasibility of replacing medium components with leachate and flue gas at the same time. In this system, the cultivation of thermophilic cyanobacteria and the two major pollutants of power plants were mutually beneficial, and at the same time achieve the results of resource utilization of pollution sources, reduction of cultivation costs and production of phycobiliprotein(PBPs).