Abstract: With the implementation of waste classification in the country， a large amount of kitchen waste had been generated， and new terminal facilities need to be established to make use of it. Eco-mechanical Biological Treatment(EMBT) is a technology that could maximize the utilization of organic resources in domestic waste. The biological hydrolysis reactor is the core unit of EMBT technology， which could efficiently convert different types of organic matter from solid to liquid phase. The organic slurry obtained by extrusion could be used in efficient wet anaerobic reactors. The slurry after hydrolysis and acidification had higher gas production rate， which could shorten the residence time of anaerobic reactor and improve its stability. Through pilot scale experiment， the change laws of kitchen waste reduction rate， chemical oxygen demandof slurry under different retention time， stirring rate and temperature conditions were compared. Compared with the parameters of direct extrusion， it was found that the best result was that under the residence time of two days， the reduction rate of kitchen waste could reach 64%， the total amount of COD conversion could reach more than 247 kg/t，the slurry could be produced after biological hydrolysis， and the gas yield of volatile solid could reach 877.6 mL/g， which was superior to the reduction rate corresponding to the direct extrusion of kitchen waste and the parameters of the generated slurry.

Key words: kitchen waste, recycling, hydrolysis, mechanical biological ablation technology