添加污泥饼补充氮源的农作物秸秆高固体厌氧消化启动研究

采用高固体厌氧消化工艺处理农作物秸秆，并利用污水处理厂污泥饼进行氮源补充，既可以减轻对秸秆和污泥处置带来的环境污染，更能产生大量的沼气能源和有机肥，缓解农村的能源供给压力和过度使用化肥造成的土壤贫瘠.对2个高固体厌氧消化反应器启动阶段的变化规律进行了研究，结果表明，秸秆经过NaOH化学预处理并投加5％左右的污泥调节C/N后，厌氧消化效果良好.启动期共计930 h，启动阶段完成了厌氧污泥活性的恢复和菌种的驯化.启动期结束时，进料含固率约为12%～16%，产气速率为0.15～0.18 L/h.启动阶段pH的变化和产气情况的变化呈现出较为明显的相关性.1号反应器的TS和VS降解率分别为54%和65%，2号反应器则为67%和75%.启动阶段COD浓度较低，为1 000～6 000 mg/L，氨氮浓度为200～600 mg/L.

Start-up of High Solid Anaerobic Digestion Process for Treating Straw with Sludge Cake as Nitrogen Additive

Straw co-digestion with sludge cake as nitrogen additive from wastewater treatment plant(WWTP) can solve the pollution problems of improper treatment of straw and sludge.Moreover the products,including biogas and organic manures,can relieve the problems of energy supply and soil infertility in countryside.The properties of the start-up periods of two anaerobic digestors were studied.The result showed that the efficiency of the anaerobic digestors rose after pre-treating the straw by NaOH and adjusting C/N b...