Vertical non-stirred organic waste dry-type anaerobic digestion processing equipment and method

Abstract

The invention discloses vertical equipment for treating organic waste by dry anaerobic digestion without stirring and a method thereof. The equipment comprises that a feed port and an air outlet are arranged on the vertical digester; a discharge port is arranged on the bottom of the vertical digester; a feeding storage tank is connected with the discharge port of the vertical digester through a pipeline, an inoculation mixing tank and a delivery pump; the discharge port of the vertical digester is connected with the inoculation mixing tank through a control valve; a biogas slurry discharge pipe is arranged on the lower part of the vertical digester, and is connected with a spraying device arranged on the upper part of the vertical digester through a pH value on-line monitor, a reflux pumpsequentially; and an alkali solution storage tank is connected with the reflux pump through the pipeline and the control valve. The vertical equipment for treating organic waste by dry anaerobic digestion without stirring and the method thereof overcome the defects of difficult isotrope mixing, easy isotrope acidification and the like of the prior dry anaerobic digestion system, and is applicableto treatment on household organic garbage, kitchen garbage, excrement of fowls and livestocks, agricultural waste, garden garbage, sewage sludge and other organic waste.

Description

technical field [0001] The invention relates to an organic solid waste treatment technology, in particular to a device and method capable of degrading organic solid waste and generating clean energy biogas through anaerobic digestion technology under high solid content conditions, belonging to solid waste treatment technology and Biomass technology field. Background technique [0002] A large amount of organic solid waste is produced in daily life and production activities, mainly including domestic organic waste, kitchen waste, poultry manure, agricultural waste, garden waste, sewage sludge and so on. If these organic wastes are not treated effectively, they will easily cause adverse effects on the environment. [0003] The use of anaerobic digestion technology to treat organic solid waste can not only realize the harmless treatment of waste, but also recover biogas (80-400m3 / t solid waste), and the generated biogas can be used for heat production, power generation, supply...

AI Technical Summary

Problems solved by technology

However, compared with the dry anaerobic system, the wet anaerobic system has many disadvantages: for example (1) the equipment volume of the wet anaerobic digestion system is 2 to 3 times that of the dry type, so it occupies a large area, high investment, and energy consumption Large, high operating costs; (2) Scum and sediment are likely to be generated during the treatment process of the wet anaerobic digestion system, which affects the normal operation of the digestion system; (3) The wet anaerobic digestion system has higher requirements for the pretreatment of the feed; ( 4) Solid-liquid separation is difficult after digestion, and a large amount of waste water needs to be treated

The disadvantage of the existing dry anaerobic digestion system is that it is difficult to mix materials, and the fermentation materials are prone to acidification

Images