Biogas slurry resource concentration recycling treatment method and system

Abstract

The invention relates to a biogas slurry resource recycling treatment method and treatment system; the treatment method includes the treatment processes of adjusting pond treatment, pretreatment, solid-liquid separation, multistage membrane concentration treatment, multi-effect evaporation, finished product sterilization packaging and cleaning and sewage treatment operation. Ordinary biogas slurry can be filtered and concentrated into an efficient organic liquid fertilizer product, the purpose of circular use of resources is achieved, moreover, the filtrate is up to standard and discharged or reused, the scope of use is expanded, high added value utilization of the biogas slurry is achieved, environmental pollution is also avoided, additional addition of substances is not need, and the product quality optimization can be ensured; and the diversity of the product is achieved.

Description

technical field [0001] The invention belongs to the technical field of biogas slurry resource utilization, and in particular relates to a treatment method and a treatment system for biogas slurry resource recovery and utilization. Background technique [0002] As the number and intensification of large-scale farms in my country continue to increase, the amount of waste generated is large and concentrated, resulting in increasingly serious environmental pollution from livestock and poultry manure. Using anaerobic digestion to treat manure and sewage from livestock and poultry farms is a very effective way of waste treatment and utilization. Through anaerobic fermentation, it can realize the harmless treatment of waste, and can also generate a large amount of biogas for heating, cooking and For power generation and other purposes, the fermented biogas residue and biogas slurry not only contain macronutrients such as nitrogen, phosphorus, potassium and micronutrients such as zi...

AI Technical Summary

Problems solved by technology

The main problems of this treatment method are: (1) The utilization of the biogas slurry is not complete; (2) Since the biogas slurry contains a large amount of impurities and has a high viscosity, simple sedimentation, filtration and removal of impurities cannot effectively change the biogas slurry. Due to the characteristics of many impurities and high viscosity, there are still a large number of impurities and insolubles that block the membrane, resulting in increased membrane cleaning times, easy damage to the membrane, increased operating costs, and poor engineering stability.

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