Method for preparing liquid organic fertilizer from seawater and kitchen waste treated sewage, and application of fermentation liquid sediment

Abstract

The invention discloses a method for preparing a liquid organic fertilizer from seawater and kitchen waste treated sewage, and an application of fermentation liquid sediment. The method comprises thefollowing steps: culturing Bacillus amyloliquefaciens by adopting a seed culture medium, mixing seawater and kitchen waste treated sewage in proportion, performing high-temperature disinfection treatment, adding Bacillus amyloliquefaciens, and fermenting to produce the liquid organic fertilizer. In the seed culture process of the method, Bacillus amyloliquefaciens grows rapidly, and the final cellconcentration is high. In the fermentation process of the method, the main components of the fermentation medium are cheap seawater and kitchen waste, nutrient elements such as carbon sources, proteins, vitamins, lipids and inorganic salts do not need to be added, the process control is simple, the strain fermentation performance is stable, the organic fertilizer fertility is high, the preparation cost is low, and seawater desalination, municipal waste recovery and ecological agriculture are organically integrated.

Description

technical field [0001] The invention belongs to the field of biological fermentation and environmental engineering, and in particular relates to a method and application for preparing liquid organic fertilizer by utilizing seawater and kitchen garbage treated sewage. Background technique [0002] Lack of fresh water resources, domestic garbage pollution and excessive use of pesticides and fertilizers have become important factors restricting the sustainable development of human society and the natural environment. Seawater desalination can greatly alleviate the crisis of freshwater resources. However, due to cost constraints, seawater desalination technology (mainly reverse osmosis technology) has only been applied in a few developed countries. Whether there is a low-cost, simple and feasible technology remains to be explored. [0003] In densely populated cities, a large amount of kitchen waste is generated every day, which can be divided into solid waste and liquid oil-wat...

AI Technical Summary

Problems solved by technology

Seawater desalination can greatly alleviate the crisis of freshwater resources. However, due to cost constraints, seawater desalination technology (mainly reverse osmosis technology) has only been applied in a few developed countries. Whether there is a low-cost, simple and feasible technology remains to be explored.

[0003] In densely populated cities, a large amount of kitchen waste is generated every day, which can be divided into solid waste and liquid oil-water mixture. The solid waste can be composted into organic fertilizer, and the upper layer of oil-water mixture is separated and transformed. biodiesel, and most of the remaining slurry sewage is directly discharged due to the high salinity and difficult treatment, which not only wastes a large amount of organic nutrients, but also pollutes the environment