Method for preparing ecological bacterial fertilizer by utilizing pig manure wastewater subjected to anaerobic treatment

Abstract

The invention relates to the technical field of wastewater treatment and plant planting, in particular to a method for preparing an ecological bacterial fertilizer from pig manure wastewater subjectedto anaerobic treatment. According to the method for preparing the ecological bacterial fertilizer by using the pig manure wastewater, provided by the invention, anaerobic tank effluent of an anaerobic-anoxic-aerobic three-stage wastewater treatment system of the pig manure wastewater is used as a raw material, and photosynthetic bacteria rhodopseudomonas palustris, rhodobacter capsulatus and rhodobacter sphaeroides are used for culturing and preparing the ecological bacterial fertilizer. The ecological bacterial fertilizer can be prepared from pig manure wastewater in an anaerobic tank through one-time culture by compounding use of the same kind of bacteria, the degradation efficiency of organic matters, ammonia nitrogen and toxic and harmful substances in the wastewater is remarkably improved, and the method has the advantages of simple strain preparation and wastewater treatment processes, low cost and the like; the prepared ecological bacterial fertilizer is rich in various nutrient elements and photosynthetic bacteria, can significantly improve the metabolic activity of plant growth, photosynthesis and the like, enhances the soil fertility, and effectively improves the yield and quality of plants.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and plant planting, in particular to a method for preparing ecological bacterial fertilizer by using photosynthetic bacteria using anaerobically treated wastewater in the pig manure wastewater treatment process as a raw material. Background technique [0002] Since Japanese scientist M. Kobayashi and others discovered that photosynthetic bacteria (PSB) can purify water in the 1960s, photosynthetic bacteria have always been concerned by people. Photosynthetic bacteria are widely distributed in oceans, rivers, lakes and soils. Rhodobacter Sphaeroides, as the most widely used photosynthetic bacterial strain, is widely used in the treatment of soybean processing wastewater, sugar factory wastewater, light industrial wastewater, livestock and poultry wastewater, and the removal rate of COD can reach 70%-90%. Some extracts from photosynthetic bacteria obtained after wastewater treatment pr...

AI Technical Summary

Problems solved by technology

[0006] Livestock and poultry breeding sewage is rich in organic matter and ammonia nitrogen, and contains a variety of heavy metal ions. It is easy to have adverse effects on plant growth when used directly as fertilizer.

In the prior art, the use of livestock and poultry breeding sewage to prepare ecological bacterial fertilizers usually requires the joint action of complex microbial systems composed of various anaerobic microorganisms such as nitrifying bacteria, various aerobic microorganisms such as Bacillus, and fungi, or through multi-stage fermentation. Treatment and preparation, strain cultivation process and wastewater treatment process are complicated and costly, and the strains and nutrient composition of the prepared ecological bacterial fertilizer have very limited effects on the growth and quality of plants, and are not suitable for large-scale application

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