Hao Li-ping, Lü Fan, He Pin-jing, Shao Li-ming
Key Laboratory of Yangtze River Water Environment, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Huan Jing Ke Xue. 2008 Sep;29(9):2637-42.
Methanogenic effluent was recycled to regulate hydrolysis during two-phase anaerobic digestion of organic solid wastes. In order to study the impact of recycled effluent's volume on hydrolysis, four hydrolysis reactors filled with vegetable and flower wastes were constructed, with different liquid volumes of recycled methanogenic effluent, i.e., 0.1, 0.5, 1.0, 2.0 m3/(m3 x d), respectively. The parameters related to hydrolytic environment (pH, alkalinity, ORP, concentrations of ammonia and reducing sugar), microbial biomass and hydrolysis efficiency (accumulated SCOD, accumulated reducing sugar, and hydrolysis rate constants) were monitored. This research shows that recycling methanogenic effluent into the hydrolysis reactor can enhance its buffer capability and operation stability; higher recycled volume is favorable for microbial anabolism and further promotes hydrolysis. After 9 days of reaction, the accumulated SCOD in the hydrolytic effluent reach 334, 407, 413, 581 mg/g at recycled volumes of 0.1, 0.5, 1.0, 2.0 m3/(m3 x d) and their first-order hydrolysis rate kinetic constants are 0.065, 0.083, 0.089, 0.105 d(-1), respectively.
在有机固体废物两相厌氧消化过程中，将产甲烷出水进行循环以调节水解过程。为了研究循环出水水量对水解的影响，构建了4个填充蔬菜和花卉废弃物的水解反应器，分别采用不同液体体积的循环产甲烷出水，即0.1、0.5、1.0、2.0 m³/(m³·d)。监测了与水解环境相关的参数（pH、碱度、氧化还原电位、氨和还原糖浓度）、微生物量以及水解效率（累积溶解性化学需氧量、累积还原糖和水解速率常数）。本研究表明，将产甲烷出水循环至水解反应器可增强其缓冲能力和运行稳定性；较高的循环量有利于微生物合成代谢，并进一步促进水解。反应9天后，在循环量为0.1、0.5、1.0、2.0 m³/(m³·d)时，水解出水的累积溶解性化学需氧量分别达到334、407、413、581 mg/g，其一级水解速率动力学常数分别为0.065、0.083、0.089、0.105 d⁻¹。
