Biogas slurry and excrement fractional precipitation treatment device and method

Abstract

The invention provides a biogas slurry and excrement fractional precipitation treatment device and a method, and relates to the technical field of novel energy. The biogas slurry and excrement fractional precipitation treatment device comprises a screw extrusion solid-liquid separator and a plurality of precipitation tank units which are connected in sequence, and each precipitation tank unit comprises a plurality of precipitation tanks which are connected in parallel. According to the method, screw extrusion solid-liquid separation is adopted before precipitation using the precipitation tanks, and deposition fractional treatment of the precipitation tank units is adopted, so that the most reasonable treatment and utilization mode is provided for biogas slurry and excrement treatment, andthe sewage treatment problem of breeding enterprises and biogas engineering is successfully solved.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a device and method for biogas slurry and sewage excrement graded sedimentation treatment. Background technique [0002] Large and medium-sized biogas projects play an important role in promoting the development of circular economy in the project area, improving the ecological environment and promoting the adjustment of agricultural production structure. They are of great environmental and social significance, and have a bright development prospect at present. [0003] However, the most difficult thing to deal with in all biogas projects is the biogas slurry produced, especially for large-scale aquaculture enterprises, a large amount of water soaks in sewage and manure, and the output is huge. After the biogas project is processed, the huge biogas slurry output is a problem for enterprises. The core of the problem is the physical and chemical characteristics of biogas slurry ...

AI Technical Summary

Problems solved by technology

For example, equipment such as filter presses has a small processing capacity, which not only cannot solve the problem of sewage treatment, but also produces wastewater after cleaning the filter cloth, and the sewage increases instead of decreasing; centrifuge equipment has a large processing capacity, but the separation effect is poor The boundaries of liquid separation are blurred, and the sewage is not treated; the drum sieve type has a small processing capacity and can only separate large particles, the working environment is poor, and there is no sewage treatment; the solid-liquid separation type by screw extrusion has a good solid-liquid separation effect, but the minimum It can only separate particles above 0.5mm, and the production capacity of a single unit is low, and there is no sewage treatment capacity; the vacuum filter aid filter has a relatively good treatment effect, but the processing capacity of a single unit is small, the consumption of filter aid is large, and the cost is high. The treatment itself is another problem, and the sewage treatment has not been solved; the ultrafiltration reverse osmosis water treatment equipment has a good water treatment effect, but the maximum solid particle cannot exceed 100 μm, and the equipment investment is large, most of the equipment cannot perfectly exceed Front-end treatment requirements for filtration and reverse osmosis water treatment equipment

[0004] The biogas slurry is directly used for farmland irrigation without treatment. Long-distance transportation costs, farmland seasonality, crop type requirements and irrigation time-limited requirements, as well as irrigation facilities (such as sprinkler irrigation, drip irrigation facilities), cannot be adjusted in terms of adaptability, demand, and irrigation. Achieved in terms of economics and facility constraints, there are huge obstacles at the technical level

[0005] In order to avoid or alleviate the problem, many enterprises only use sewage with low water content after solid-liquid separation. A large number of sewage aquaculture enterprise stocks cannot be effectively disposed of, and can only be secretly discharged, causing pollution to the environment; at the same time, it is harmful to the enterprise itself Development is also a huge limitation

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