Process for utilization of kitchen refuse as resource

Abstract

The invention relates to a method for cultivating fish via kitchen waste, which comprises dewatering kitchen waste, while it content is lower than 70%, and selecting metal foreign matters via magnetic method; boiling and disinfecting, to evaporate the water more then 60%, extracting liquid grease; drying and breaking solid to make into forge; using the waste liquid as industrial grease material and fertilizer; recycling the waste slag liquid as marsh gas to supply heat; using waste gas recycle heating technique to support fish cultivation; and recycling clean condensed water to support fish cultivation.

Description

technical field [0001] The invention relates to a resource recovery and recycling method, in particular to a resource utilization process of kitchen waste. Background technique [0002] At present, some cities in China have begun to develop technologies for resource utilization of food waste. There are several ways to deal with food waste in China: [0003] At present, the use of kitchen waste as feed is a biological method, which uses biotechnology to make feed, and its production process is complicated. Firstly, a large amount of biomass auxiliary materials must be supplemented. Usually, the amount of added biomass auxiliary materials is equivalent to the amount of kitchen waste, and the cost of collecting and transporting biomass auxiliary materials is very high. Second, high temperature drying must be used, and the large amount of drying results in more energy consumption. [0004] The other is the direct drying method. The disadvantages of the currently used technolo...

AI Technical Summary

Problems solved by technology

One, garbage sorting is difficult, it is difficult to sort in kitchen waste with extremely high moisture content, and the efficiency of using machinery is low, so the process of the present invention is the opposite, sorting after drying; second, Generally, drying equipment is usually aimed at a single type of material with a relatively consistent shape. To achieve this, the food waste must be sorted first, then extruded, and then transported, which consumes manpower and material resources and is inefficient. In this way, materials of different sizes can be mixed into the feed, and the feed is basically crushed except for impurities during discharge, and the entire process steps are extremely simplified; third, the process of the present invention also solves the problems of recovering heat energy and other waste water, waste gas, etc. , to meet the requirements of clean production and energy saving; Fourth, the usual oil separation method is one is oil-water separation, and the other is pressing from solid matter, both of which need to be carried out in several steps

Images