The invention relates to a method for realizing harmless comprehensive treatment of human excrements through adopting
biotechnology, in particular to a comprehensive technology used for the harmless centralized treatment of human excrements in urban areas. The method comprises the following steps that: (1) human excrements, aquatic plants and terrestrial plants are added in a fermenter, and then a composite strain
mixed solution of microzyme, bacillus and
lactobacillus is fed into the fermenter so as to carry out aerobic
fermentation and anaerobic
fermentation in turn; (2) the
biogas generated during
fermentation is fed into a
biogas generating set so as to generate
electricity; (3) the products after fermentation undergoes
solid-liquid separation, and the
solid fermentation products are made into
solid organic fertilizer through
dewatering,
drying, preparation and regranulation; (4) the liquid fermentation products is obtained after solid-liquid separation undergo decoloring,
filtration and settlement layering, in the liquid, the sublayer liquid in the solution is made into liquid
organic fertilizer through coarse
filtration, secondary
filtration, sterilization and preparation and the supernatant is made into rinsing meeting
effluent standard through
aeration and settlement filtration. The method can realize clean, environment-friendly and energy-saving ecological production.