Microalgae cultivation on wastewater is one of the most promising processes in perspective of green and circular economy. This study investigated the economics of integrating the microalgae cultivation with the wastewater treatment in perspective of biomass production and wastewater treatment. The cost of integrated process was evaluated for six cases: three cases for domestic wastewater at different stages of treatment including sewage, anaerobically digested domestic effluent, and centrate and three cases for industrial wastewater including agro-industrial wastewater, anaerobically digested piggery effluent, and anaerobically digested abattoir effluent. The cost of biomass production was found ranging from $ 0.39 to $ 0.92/kg with minimum for the anaerobically digested domestic effluent and centrate. The cost of wastewater treatment was found ranging from 0.18 to 1.69/m³ with minimum for the sewage. These costs did not include any credits generated from the biomass or the treated wastewater. The concentration of limiting nutrient, flowrate of wastewater, and the extent of nutrient removal are the major cost-influencing parameters for the integrated process.

从绿色和循环经济的角度来看，废水微藻培养是最有前途的工艺之一。本研究从生物质生产和废水处理的角度调查了将微藻培养与废水处理相结合的经济性。综合工艺的成本评估了六种情况：生活污水在不同处理阶段的三种情况，包括污水、厌氧消化的生活污水和离心分离液，以及三种工业废水，包括农业工业废水、厌氧消化的猪舍出水和厌氧处理消化的屠宰场污水。生物质生产的成本范围从 0.39 美元到 0.92 美元/公斤，厌氧消化的生活污水和离心液的成本最低。³用最少的污水。这些成本不包括从生物质或处理过的废水中产生的任何信用。限制性营养物的浓度、废水的流速和营养物的去除程度是影响集成过程成本的主要参数。