Anaerobic rapid starting and anaerobic-aerobic integrated fermentation method at low temperature

The invention discloses an anaerobic rapid starting and anaerobic-aerobic integrated fermentation method at a low temperature and relates to environment-friendly and energy technologies. The method comprises the following steps that: in the initial anaerobic fermentation stage, an air compressor crushes methane into a tank body through a pipeline to form an anaerobic environment, and simultaneously, an electric heating machine heats crushed methane so as to heat a material in the tank body, and heat preservation is carried out by using a heat preservation layer so as to solve the problems that anaerobic fermentation is difficult to start at the low temperature (less than or equal to 20 DEG C) and the process temperature is difficult to control, and simultaneously the starting speed of the anaerobic fermentation can reach the natural starting speed of the anaerobic fermentation at the temperature of less than or equal to 20 DEG C; and after the anaerobic fermentation is finished, and air is introduced into the tank body so as to carry out aerobic composting fermentation on biogas residues.