Landfill is a simple and universal garbage disposal method. But it will limit the comprehensive recovery of garbage resources, occupy a lot of land and pollute the environment.

2, incineration method

Incinerate kitchen waste and domestic waste together or establish a waste incineration plant to generate electricity through the heat generated by waste incineration.

3. Composting method

Relying on microorganisms such as bacteria, actinomycetes and fungi which are widely distributed in nature, under the condition of manual control, the water of restaurant waste residue is evaporated, dried and crushed, and through a series of treatment procedures, restaurant waste residue is transformed into organic compound fertilizer for agricultural production to prevent the generation of harmful gases.

Composting treatment mainly includes aerobic composting and earthworm composting.

4. Anaerobic fermentation

Anaerobic process refers to the use of garbage to produce biogas and convert it into electricity and gas, and the residue produced by anaerobic digester is fermented and composted for the second time. Dry method and wet method are commonly used in the world.

Biogas, hydrogen, ethanol or lactic acid can be obtained by anaerobic digestion of kitchen waste.

The process flow is as follows:

5. Production of biodiesel

Biodiesel refers to diesel oil produced by transesterification with animal and vegetable oils as raw materials, also known as renewable fuel oil. Waste edible oil was made into bio-oil by acid-base two-step method, separation reaction method and complete catalysis method.

The process flow is as follows:

6, biochemical processor

High-temperature compound microbial strains with strong vitality and proliferation ability in nature were selected to ferment organic wastes such as food and kitchen waste at high temperature and high speed in biochemical treatment equipment, so that various organic substances were degraded and transformed.

7. Feed technology

Kitchen waste contains a lot of organic nutrients, and its feed has considerable advantages. Forage can be divided into biological method and physical method.

Biological method: using microbial cells to treat kitchen waste, using the growth, reproduction and metabolism of microorganisms to accumulate useful cells, enzymes and intermediates, and drying them to make protein feed.

Physical method: the kitchen waste is directly dehydrated, dried and disinfected, and then crushed into feed. Dehydration methods include conventional high-temperature dehydration, fermentation dehydration and frying dehydration.

According to the requirements of process selection, the production process of bio-fermented protein feed with kitchen waste as raw material was designed, as shown in the figure: