Abstract
Assessing the comprehensive performance of coal chemical wastewater process is an intricate and important task due to different biochemical treatment technologies. In this work, a 3E triangle model is developed to evaluate biochemical and advanced treatment technologies for zero liquid discharge of fix-bed coal gasification wastewater treatment process. In 3E triangle model, 19 key performance indicators are considered. In engineering performance aspect, up-flow anaerobic sludge blanket reactor case shows the best performance. In the life cycle environmental impact aspect, sequence batch reactor case shows the best performance through life cycle assessment, especially freshwater aquatic ecotoxicity potential and global warming potential. Generally, due to the higher fixed cost and power consumption of other technologies, the depreciation and variable cost of up-flow anaerobic sludge blanket reactor case are lower. Overall, the up-flow anaerobic sludge blanket reactor case shows excellent performance in 3E comprehensive performance. In addition, membrane bioreactor has better development prospects and its weight has a greatest impact which COD removal accounts for the majority.
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