Abstract: Microalgae has environmental and economic advantages in wastewater.Carbon sequestration experiments are respectively carried out in raw purified terephthalic acid (PTA) wastewater and PTA wastewater treated by three different treatment methods.Experimental results show that the degradation rate of COD by oocystis in raw PTA wastewater reaches 84.56%,and the average carbon sequestration efficiency is only 79.57% due to high initial COD concentration in raw PTA wastewater.The average carbon sequestration efficiencies of microalgae reach 97.78% and 95.74% in PTA wastewater treated by biochemical treatment and UV pretreatment,respectively,and maintain relatively stable.The removal rate of COD is only 58.18% if raw PTA wastewater is pretreated by Fenton method.However,the average carbon sequestration efficiency reaches 85.37% in PTA wastewater treated by Fenton method,which is higher than the corresponding value of raw PTA wastewater.It is indicated that using PTA wastewater as medium to cultivate microalgae can achieve wastewater purification and CO2 sequestration at the same time,and has a better carbon sequestration effect in the pretreated wastewater.
刘明. 以PTA废水为介质的微藻固碳研究[J]. 现代化工, 2022, 42(12): 221-228,234.
LIU Ming. Study on carbon dioxide sequestration by microalgae in PTA wastewater. Modern Chemical Industry, 2022, 42(12): 221-228,234.
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