CN211999106U

CN211999106U - Dirty zero release processing system of excrement of small-scale beasts and birds plant

Info

Publication number: CN211999106U
Application number: CN202020257559.3U
Authority: CN
Inventors: 林国宁; 赖日坤; 张建华
Original assignee: Guangdong Shuiqing Environmental Protection Technology Co ltd
Current assignee: Guangdong Shuiqing Environmental Protection Technology Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-11-24
Anticipated expiration: 2030-03-05

Abstract

A small-scale livestock and poultry farm excrement zero discharge treatment system comprises a mechanical grating, a concentration tank, a tubular microfiltration membrane, a circulating pump, a concentrated slag tank, a sludge pump and a compost fermentation bed, wherein an inlet of the concentration tank is connected with the mechanical grating and used for isolating large granular solids, and an outlet of the concentration tank is connected with the tubular microfiltration membrane and used for intercepting untreated fine granular matters; supernatant treated by the tubular microfiltration membrane flows back to the concentration tank through a circulating pump for circulating filtration until effluent reaching the standard is recovered; the other outlet of the concentrated tank is connected to a concentrated slag tank, and the outlet of the concentrated slag tank is connected to a compost fermentation bed through a sludge pump. The utility model provides a current dirty zero release of excrement handle technical treatment effect not good, the problem of long and the wasting of resources of processing time.

Description

Dirty zero release processing system of excrement of small-scale beasts and birds plant

Technical Field

The utility model relates to a sewage purification field especially relates to a dirty zero release processing system of excrement of small-scale beasts and birds plant.

Background

According to statistics, the respiratory oxygen demand and dim discharge amount discharged by livestock and poultry breeding all over the country respectively account for 45 percent and 25 percent of the total national discharge amount, and account for 95 percent and 79 percent of the total agricultural source discharge amount. A large amount of culture manure is directly discharged into the environment without being effectively treated, and serious environmental damage influence is caused to surrounding areas. In order to strengthen the pollution control of large-scale livestock and poultry breeding, reduce agricultural non-point source pollution and improve the living environment of rural areas, the state department has promulgated and implemented the pollution control regulations of livestock and poultry breeding (state department's command [ 2013 ] No. 643). However, the pollution prevention and control of a large number of small-scale livestock farms which do not belong to the scale cultivation category has not yet attracted sufficient attention, and the small-scale livestock farms generally have the problems of wide distribution range, large quantity, improper site selection, insufficient pollution prevention and control investment, poor environmental management and the like, and the problem of environmental pollution generated by the small-scale livestock farms is very prominent. Therefore, scientific research is carried out on the current situation of small-scale livestock and poultry farms.

The prior market has a livestock and poultry manure ecological full-degradation zero-emission treatment technology, and the system has the following problems: 1. the existing zero-emission treatment technology mainly uses a fermentation degradation bed, the treatment of the waste water is also uniformly carried out by using the fermentation bed, the excrement and urine separation is not carried out, the water content of the plastic exceeds more than 60 percent, the solid matters in the excrement are too low to reach the expected treatment effect, and even the dead bed phenomenon can occur. 2. For waste water, the treatment can be completed only by evaporation, which easily causes the problems of water accumulation and the like in a fermentation bed, and the treatment time is greatly increased and the period is long. 3. The zero discharge technology can not recycle the treated wastewater, thereby causing certain resource waste. Therefore, the invention of a small-scale livestock and poultry farm feces zero-discharge treatment system is very important.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a dirty zero release processing system of excrement of small-scale beasts and birds plant solves the problem that existing zero release processing technology treatment effect is not good, processing time is long and the wasting of resources.

The utility model provides a technical scheme that its technical problem adopted is:

a small-scale livestock and poultry farm excrement zero discharge treatment system comprises a mechanical grating, a concentration tank, a tubular microfiltration membrane, a circulating pump, a concentrated slag tank, a sludge pump and a compost fermentation bed, wherein an inlet of the concentration tank is connected with the mechanical grating and used for isolating large granular solids, and an outlet of the concentration tank is connected with the tubular microfiltration membrane and used for intercepting untreated fine granular matters; supernatant treated by the tubular microfiltration membrane flows back to the concentration tank through a circulating pump for circulating filtration until effluent reaching the standard is recovered; the other outlet of the concentrated tank is connected to a concentrated slag tank, and the outlet of the concentrated slag tank is connected to a compost fermentation bed through a sludge pump.

Furthermore, in order to adapt to a small-scale fecal sewage treatment system and save the space of a site, the concentration tank is a vertical flow type sludge concentration tank.

Furthermore, in order to effectively separate suspended particles, organic macromolecules, bacteria, microorganisms and the like in the supernatant and purify water, the pore size of the tubular microfiltration membrane is 0.1-1 micron.

The system provided by the utility model, mainly follow the treatment expense, construction cost and the operation management scheduling problem that the dirty processing of excrement was handled of small-scale livestock and poultry industry user, adopt "tubular microfiltration membrane-compost fermentation bed" technique to carry out the processing of zero release to the excrement. The results show that the technology of the tubular microfiltration membrane-compost fermentation bed has good treatment effect on the feces and good treatment effect on COD and NH3-N, the water of the recycled water filtered by the tubular microfiltration membrane can reach the recycling standard, the compost fermentation bed has obvious treatment effect on concentrated sludge, the feces are directly absorbed in the field, and in addition, the generated crude manure can be packaged and sold, thereby achieving further commercial utilization. The whole process is continuously and stably operated, has high automation degree, low operation cost and small labor intensity, is suitable for zero-emission treatment of excrement and sewage in small-scale livestock and poultry breeding industry, and achieves zero emission and zero pollution.

Drawings

FIG. 1 is the flow diagram of the utility model relates to a zero discharge treatment system of excrement in small-scale livestock and poultry farm.

Detailed Description

The present invention will be described in more detail with reference to the accompanying drawings and examples.

As shown in fig. 1, a system for zero discharge of feces from a small-scale livestock and poultry farm and a system for implementing the method have the specific embodiments:

Firstly, passing the collected fecal sewage of the farm through a mechanical grating, wherein the mechanical grating is the first treatment process for fecal sewage treatment of the farm, and mainly has the effects of isolating large solid particles and preventing a pump and treatment equipment from being blocked and damaged;

the waste water treated by the grating enters the concentration tank from top to bottom through a water inlet pipe arranged in the center of the tank at the speed that the flow velocity in the pipe is less than 30 mm/s. The concentration tank can adopt a vertical flow type sludge concentration tank, is suitable for a small-scale excrement treatment system, saves the space of a site, the vertical flow type sludge concentration tank is not provided with a mud scraper, and the angle formed by the truncated cone inclined wall of the sludge chamber and the horizontal plane is not less than 50 degrees. Waste water rises slowly along the whole water passing section after being uniformly distributed in the tank, suspended matters are settled into sludge after the water body stays for 1-1.5 hours, the sludge enters a conical sludge settling hopper at the bottom of the tank, and clarified water flows out from the periphery of the tank along a peripheral overflow weir to form supernatant.

Then the supernatant fluid flows into a tubular microfiltration membrane, the aperture range of the tubular microfiltration membrane is 0.1-1 micron, and the supernatant fluid flows through the microfiltration membrane under the pressure of 0.1-1.8 kg/cm2 by combining the micro-flocculation technology, so that suspended particles, organic macromolecules, bacteria, microorganisms and the like in the sewage can be separated, and the water is purified. After fine particles which are not processed are intercepted, the part of the effluent is pumped back to the tubular microfiltration membrane by a circulating pump for re-filtration, and the other part of the effluent which reaches the standard is directly reused for livestock breeding.

Meanwhile, the precipitated sludge in the concentration tank is concentrated and collected into a concentrated residue tank, the sludge is pumped into a compost fermentation bed, water in the excrement is evaporated under the combined action of high temperature in a transparent shed, heat generated by fermentation, a turner and other environments and equipment, organic matters in the excrement are decomposed by microorganisms, and the excrement can be degraded within 24 hours. Wherein part of organic matters in the excrement are converted into crude fertilizers by microorganisms, the generated crude fertilizers can be sold for sale (production of the crude fertilizers, namely, substances such as nitrogen, phosphorus, potassium and the like with useful values are stored in compost of a bed body, organic fertilizers are generated under the action of compost fermentation), and the other part of substances which are not easy to convert are used as one part of padding materials or are degraded into substances such as water vapor, carbon dioxide, nitrogen and the like to volatilize, so that no waste water, waste residues and odor enter the external environment.

The above description is combined with the accompanying drawings to be right the utility model discloses dirty zero release processing system of excrement of small-scale beasts and birds plant has carried out the exemplary description, and is obvious the utility model discloses specifically realize not being restricted by above-mentioned mode, as long as adopted the utility model discloses a method design and technical scheme go on various improvements, or not improve and directly be applied to all falling in other occasions the utility model discloses an within the protection scope.

Claims

1. A small-scale livestock and poultry farm excrement zero discharge treatment system is characterized by comprising a mechanical grating, a concentration tank, a tubular microfiltration membrane, a circulating pump, a concentrated slag tank, a sludge pump and a compost fermentation bed, wherein an inlet of the concentration tank is connected with the mechanical grating for isolating large granular solids, and an outlet of the concentration tank is connected with the tubular microfiltration membrane for intercepting unprocessed fine granular matters; supernatant treated by the tubular microfiltration membrane flows back to the concentration tank through a circulating pump for circulating filtration until effluent reaching the standard is recovered; the other outlet of the concentrated tank is connected to a concentrated slag tank, and the outlet of the concentrated slag tank is connected to a compost fermentation bed through a sludge pump.

2. The system of claim 1, wherein the concentration tank is a vertical sludge concentration tank.

3. The system of claim 1, wherein the pore size of the tubular microfiltration membrane is in the range of 0.1 to 1 μm.