两级厌氧消化工艺处理高浓度有机废水

Two-stage anaerobic digestion process to treat high concentration organic wastewatery

摘要介绍了高温＋中温两级厌氧消化工艺处理酒精生产高浓度有机废水，两级厌氧处理对原水中COD、SS的去除率分别可达90％和80％，厌氧消化产气指标达0．5Nm3沼气／kgCOD，可产生30万～35万Nm3／d的沼气用于外售，且为后续好氧处理的达标排放提供了保障，在达到较好处理效果的同时，也为企业带来了可观的经济效益。

The two-stage anaerobic digestion process, which was operated under high-tempera- ture and middle-temperature in different stages, was employed to treat high concentration organic wastewater from alcohol industry. It was reported that the removal rates of COD and SS were 90% and 80% respectively. The anaerobic digestion gas production index in this process was 0. 5 Nm3 methane/kgCOD and it could produce 300 000--350 000 Nm3 methane every day for selling. This process also offered security for the clean discharge of the following aerobic treatment, which brought significant profit to the enterprise at the precondition of satisfying treatment effects.