TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The inner wall of the roller screen is provided with a spiral blade. The rotating direction of the roller sieve is matched with a spiral blade turning direction in rotating process. The spiral blade drives the waste lees from a material inlet opening and passes into a material outlet opening. The material outlet of the water tank is provided for sequentially flowing water from a front surface of the water tank through a discharge opening of a first level water tank. The obtained fermentation liquid is used for washing the waste lees in a first grade aerobic pool, a middle sedimentation tank, a secondary aerobic tank, a secondary sedimentation tank and a sand filter tank.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The liquid fermentation process comprises performing high temperature anaerobic fermentation process and medium temperature anaerobic fermentation process with yeast using a high temperature anaerobic fermentation device through a boiler tail gas as heat source supply in an anaerobic tank. The method further comprises stopping the high temperature anaerobic fermentation process when the high temperature anaerobic fermentation step using remaining heat of tail gas of a boiler to recycle the high temperature anaerobic fermentation temperature is higher than a predetermined value, storing redundant waste heat, heating the mixture of the waste water and the mixed solvent in the high temperature anaerobic fermentation process when the fermentation temperature is lower than the predetermined value, processing waste lees by passing waste residue into a side wall of a material inlet in a net cylinder sieve, driving a roller screen around an axis of rotation of a roller sieve to rotate, containing aqueous solution in the water tank to clean waste heat using a rotary power source, dropping a chaff in the waste residue in the cylinder sieve, passing other materials in the aqueous solution into the water tank, and discharging the chaff from a material outlet of the roller screen to obtain a compost, which is taken as organic fertilizer. In the step of brewing and distilling waste water and waste residue, a biomass fuel rod is used to provide fuel for brewing and distilling the waste water and waste residue. The liquid fermentation dehydration process generates sludge.