关键词: 干式厌氧')">

干式厌氧, 厨余垃圾, 干物质的量, 挥发性固体负荷, 容积产气率

Abstract:

The Chongqing Luoqi Kitchen Waste Treatment Project adopts three dry anaerobic fermentation technologies: Kompogas horizontal push flow single axis stirring, TTV tunnel kiln single axis stirring, and Dranco vertical cone bottom forced circulation stirring to recycle kitchen waste with high organic matter content in urban waste classification. By comparing the equipment integration and operating parameters of three dry anaerobic technologies, analyze and explore their technical application characteristics and advantages. By comparing the process and equipment characteristics, TTV and Dranco medium temperature dry anaerobic systems can achieve more stable operating parameters, which are superior to high-temperature dry anaerobic systems; The blade of TTV anaerobic tank is set to fit the tank body, which can effectively avoid the deposition of heavy substances and prevent blockage of discharge. Dranco vertical anaerobic tank ensures the homogeneity of materials through forced circulation and achieves rapid inoculation; The sludge dewatering process uses vibrating screens, spiral extruders, and centrifugal dewatering machines for more stable results; By comparing the operating parameters and indicators, TTV and Dranco achieved stable operation at full load; The degradation ratio of the three anaerobic technologies VS is basically the same; The key evaluation indicators of TTV have obvious technical advantages, with a volumetric gas production rate of 5.44 Nm3/m3, an anaerobic tank feed volatile solid load of 10.47 kgVS/m3 · d, and a volatile solid decomposition rate of 75.77%; Both TTV and Dranco achieved high solid content in dehydrated residue, with an average of 37%. TTV's biogas slurry production and solid content were lower than those of Kompogas and Dranco; Through economic comparison, the management and maintenance cost of TTV is 16.2 yuan/ton, and the operating consumption cost is 33.41 yuan/ton, which is significantly better than Kompogas and Dranco.

Key words:

Dry anaerobic')">"> Dry anaerobic, Kitchen Waste, The amount of dry matter, Volatile solid load, Volumetric gas production rate