城市生物质废物中温单级厌氧消化中试研究

建立了城市生物质废物中温单级厌氧消化中试反应器,对城市生物质废物厌氧消化过程系统稳定性、产甲烷性能及有机物的去除效果进行解析.反应器稳定运行410 d,共经历2.4、3.6、4.8、6.0 kg VS/(m3·d)4个负荷,反应器pH稳定在7.2 ～7.6之间,有机酸浓度＜500 mg/L.在负荷6.0 kg VS/(m3·d)时反应器平均容积产气率4.25m3/(m3·d),有机物去除率为63.2％;另外,实验结果表明,厌氧消化过程对蛋白质、脂肪、纤维素及多糖类物质的去除效果有明显差异,其中脂肪类物质去除率为98.2％,产沼气贡献率为38.8％.实现了针对我国城市生物质废物的高负荷高效厌氧消化,为我国城市生物质废物厌氧消化规模化处理提供了基础数据.

Pilot-scale research of one-stage mesophilic anaerobic digestion of municipal biomass waste

A pilot-scale one-stage mesophilic anaerobic digestion research is presented to elucidate the feasibility of developing anaerobic digestion as an effective disposal method for municipal biomass waste (MBW) in China, focusing on performance stability, biogas production and organic reduction. The reactor was operated stably for 410 d with an organic loading rate increase from 2.4 to 6.0 kg VS/(m³·d). A high biogas production rate of 4.25 m³/(m³·d) and a high organic reduction rate of 63.2% were achieved at organic loading rate of 6.0 kg VS/(m³·d). Protein, fat, cellulose and polysaccharide showed different reduction rates during anaerobic digestion, while fat can achieve 98.2% removal which is responsible for 38.8% of biogas production. The research achieved the stable operation under high OLR and high conversion rate which is of crucial importance to the development of large-scale treatment projects of municipal biomass waste in China.