污泥与其它基质共消化研究进展

厌氧消化是污泥处理的有效手段,但由于污泥碳氮比较低,易产生氨抑制,污泥单独厌氧消化存在产气量低,系统不稳定等问题。污泥与其它基质厌氧共消化可以提高甲烷产率与单位处理效率,有效解决系统不稳定的问题。针对污泥厌氧共消化进行了系统的研究,总结了基质的主要来源,就不同基质共消化时体系运行参数、系统抑制与强化因子进行了分析,发现作为共消化基质的餐厨垃圾可以得到广泛应用,油脂类或藻类物质的应用逐渐上升,污泥与基质投配比、温度、反应器类型、预处理等均能影响共消化的效果。对污泥与其它基质共消化的发展方向提出了建议和展望。

Research progress of co-digestion of sludge and other substrates

Anerobic digestion is an effective method for sludge treatment. However, ammonia inhibition is a common problem due to the low C/N ratio of sludge. Many problems such as low biogas production and unstable operation are existed during the single anaerobic digestion of the sludge. Co-digestion of sludge and other sub-strates is an effective solution to increase the methane yield and the treatment efficiency and eliminate the system instability. The co-digestion of anaerobic sludge was studied systematically and the source of substrates was summarized; besides, the operating parameters, system inhibition, and strengthening factors during the co-diges-tion with different substrates were analyzed. It was found that, kitchen waste was the most common co-digestion substrates, while the application of fats, oil, grease and algae were increasing in recent years. Sludge and sub-strates mixing ratio, temperature, reactor type, pretreatment and some other factors could affect the performance of co-digestion. Finally, the development tendency of co-digestion of sludge and other substrates was proposed and prospected.