Method for preparing ecological bacterial fertilizer from aerobic pig manure wastewater

Abstract

The invention relates to the technical field of wastewater treatment and bacterial fertilizer preparation, in particular to a method for preparing an ecological bacterial fertilizer from aerobic pig manure wastewater. The method comprises the following steps: culturing photosynthetic bacteria rhodopseudomonas palustris, rhodobacter capsulatus and rhodobacter sphaeroides by taking aerobic stage tank effluent of an anaerobic-anoxic-aerobic three-stage wastewater treatment system of pig manure wastewater as a raw material; the ecological bacterial fertilizer can be prepared from high-potassium-content aerobic pool pig manure wastewater effluent through one-time culture by compounding the same kind of bacteria, so that the degradation efficiency of organic matters, ammonia nitrogen and toxic and harmful substances in the wastewater is 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, quickly increases the contents of available phosphorus and available potassium in soil, effectively improves the yield and quality of plants, and improves phosphorus-deficient and potassium-deficient barren soil.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and bacterial fertilizer preparation, in particular to a method for preparing ecological bacterial fertilizer using photosynthetic bacteria using aerobic treatment effluent in the process of aerobic pig manure wastewater treatment 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 was...

AI Technical Summary

Problems solved by technology

[0006]Livestock and poultry breeding sewage has the characteristics of high COD, high ammonia nitrogen content, and contains a variety of heavy metal ions. It is easy to have adverse effects on plant growth when directly used 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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