Poly-generation method employing coupling of biomass with livestock and poultry manure

Abstract

The invention belongs to the technical field of comprehensive utilization of biomass and livestock and poultry manure, and particularly relates to a poly-generation method employing coupling of biomass with livestock and poultry manure. The poly-generation method comprises the following steps: burning straws to generate power so as to provide heat, pretreating the straws and the livestock and poultry manure, respectively hydrolyzing and acidifying the straws and livestock and poultry manure, feeding the straws and livestock and poultry manure having been hydrolyzed and acidified into a CSTR anaerobic fermentation tank, allowing the hydrolyzed and acidified straw and livestock and poultry manure to undergo medium-temperature anaerobic fermentation in the CSTR anaerobic fermentation tank so as to obtain biogas and biogas slurry, subjecting the biogas slurry to solid-liquid separation before preparation of an organic fertilizer from the biogas slurry, and subjecting the biogas to drying, gas-water separation, desulfurization and filtration before preparation of natural gas from the biogas. According to the invention, the straw and the livestock and poultry manure are coupled and recycled to generate electricity, heat, cold, biogas and organic fertilizer, so harmless utilization of resources is realized.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of biomass and livestock and poultry manure, and in particular relates to a method for coupling polygeneration of straw and livestock and poultry manure. Background technique [0002] There are a large number of livestock and poultry farms in my country, and the amount of fecal sewage produced is relatively large. Tons of waste materials cannot be effectively controlled. A large part of them is discharged at will and seeps into fields or rivers, polluting people's living environment. Moreover, my country has not issued a clear policy to manage the manure and waste of livestock and poultry farms, so there has been a situation of disordered management of many breeding units. There are also many traditional ways to treat livestock and poultry manure, such as using it as fertilizer, as feed, or other natural biological treatment methods and so on. It's just that the feasibility and ...

AI Technical Summary

Problems solved by technology

Although returning to the field is an effective way to reduce the amount of biogas slurry, due to the complex composition of the biogas slurry, the use of returning to the field is also affected by many factors such as land carrying capacity and seasonal changes, resulting in that the biogas slurry cannot be fully absorbed. Further harmless treatment

[0004] Livestock and poultry manure will pollute the soil, environment, and air. The following problems will exist in the treatment of livestock and poultry manure: ①Livestock and poultry manure contains a large number of bacteria, fungi, sporophytes, and some of them also contain viruses and parasites, which are harmful to livestock and poultry. If the treatment of poultry manure is not in place, it is easy to pollute the water source, soil and the air in the farm, causing the spread of pathogens; ②Most livestock and poultry feed contains heavy metal elements such as iron, copper, zinc, and manganese. It cannot be completely absorbed and utilized by livestock and poultry, and will be excreted when livestock and poultry excrete feces and urine. These metal elements will cause serious pollution to water and

③Due to the different absorption and utilization of antibiotics by livestock and poultry, and the lack of professional knowledge of some farmers, antibiotics are abused, resulting in some antibiotics being excreted with the excretion of livestock and poultry

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