[废弃活性污泥与厨余垃圾的共消化]

[Co-digestion of waste activated sludge and kitchen garbage].

作者信息

Fu Sheng-tao, Yu Shui-li, Yan Xiao-ju, Fu Ying

机构信息

School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.

出版信息

Huan Jing Ke Xue. 2006 Jul;27(7):1459-63.

PMID:16881330

Abstract

The effects of mixture ratio and hydraulic retention time on mesophilic co-digestion of waste activated sludge and kitchen garbage were investigated, and the mixtures having the ratios of 75%:25%, 50%:50% and 25%:75% on a TS basis, operated at the HRTs of 10d, 15d and 20d. In all the digesters, with an OLR 1.53-5.63 g/(L x d), there were no indication of failure, such as low pH, insufficient alkalinity, ammonia inhibition and accumulation of VFAs. The optimum operating conditions of all the digesters were found to be a mixture of 50%:50% in terms of the stability and performance, buffer capacity was the highest. The volatile solid removal efficiency, specific methane production and methane content in this condition achieved 51.1%-56.4%, 0.353-0.373 L/g and 61.8%-67.4%.

摘要

研究了混合比例和水力停留时间对废活性污泥与厨余垃圾中温共消化的影响，以总固体（TS）计，混合比例分别为75%:25%、50%:50%和25%:75%，水力停留时间分别为10天、15天和20天。在所有消化器中，有机负荷率为1.53 - 5.63 g/(L·d)时，未出现诸如低pH值、碱度不足、氨抑制和挥发性脂肪酸（VFA）积累等失败迹象。就稳定性和性能而言，所有消化器的最佳运行条件是50%:50%的混合物，缓冲能力最高。在此条件下，挥发性固体去除效率、单位甲烷产量和甲烷含量分别达到51.1% - 56.4%、0.353 - 0.373 L/g和61.8% - 67.4%。