CN207877510U - A kind of dairy cow farm wastewater comprehensive treatment system - Google Patents

Abstract

The utility model discloses a comprehensive wastewater treatment system for dairy farms, comprising water inlet equipment, a mechanical grid, a solid-liquid separation system, a methane tank, a regulating tank, a UASB treatment system, a microorganism-enhanced CASS treatment system, a sedimentation tank, and a biological oxidation system. The pond and the disinfection device are connected, and the wastewater discharged by the disinfection device can be directly discharged or reused; the solid-liquid separation system will perform solid-liquid separation treatment on the wastewater, and after the treatment, the separated wastewater will be discharged to the biogas digester through the sewage pipe. The residue is separated and enters the compost pit; the biogas pit and the UASB treatment system are both connected with a gas collection device. The utility model takes strengthening denitrification microorganisms as the core technology, "solid-liquid separation-anaerobic treatment-aerobic treatment" as the process flow, "solid composting-biogas collection-wastewater reuse" as the final treatment target, and can efficiently treat farms Waste water and various wastes generated during the treatment process can be utilized as resources, which can greatly save costs and have good market promotion value.

Description

A comprehensive wastewater treatment system for dairy farms

technical field

The utility model relates to the technical field of wastewater treatment, in particular to a comprehensive wastewater treatment system for dairy farms.

Background technique

With the increasing demand for dairy products and strict quality control, large-scale farming has increasingly become the development trend of dairy farming enterprises. At this stage, dairy farms use a large number of water-washing manure processes to treat breeding waste, and the resulting wastewater has obvious The three high characteristics (COD; ammonia nitrogen; ss), if discharged without treatment, will inevitably affect the surrounding water environment. At the same time, due to the high content of organic matter in the wastewater, it will also cause a foul smell. Therefore, the comprehensive treatment of wastewater from dairy farms necessary.

At present, the sewage treatment methods of dairy farms mainly include fermentation in biogas digesters, and then processed by complex processes. The utility model with the application number 201520426963.8 discloses a wastewater treatment system for farms. First, the liquid is separated through a mechanical grid, and then the liquid is separated through a microfilter, a regulating tank, a first-level UASB reaction tower, an intermediate pool, and a second-level UASB reaction tower. , contact oxidation tank, sedimentation tank, and disinfection tank are treated in sequence, and disinfection drugs are added during the treatment process. The water quality after treatment can reach the maximum allowable discharge concentration of the second type of pollutants in the "Comprehensive Wastewater Discharge Standard" (GB8978-1996) Class I standard.

The sewage treated by this process can meet the national standard, but the process is relatively complicated, and chemicals are used in the sewage treatment process. The salt ions in the treated sewage exceed the standard, causing secondary pollution. At the same time, the wastewater from dairy farms The nitrogen content in the wastewater is high, and the denitrification ability of wastewater by ordinary treatment methods is limited, and the comprehensive utilization rate of waste is low.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, one purpose of the utility model is to propose a comprehensive treatment system for dairy farm wastewater. This process is fully automatic design, which can greatly save costs. At the same time, the wastewater treatment capacity is strong. Discharge requirements, can play a reasonable use of biogas and solid waste, suitable for farm wastewater treatment, has a very good market promotion value.

A comprehensive wastewater treatment system for dairy farms according to an embodiment of the present invention includes water inlet equipment, the outlet of the water inlet equipment is connected to a mechanical grille, and the outlet of the mechanical grille is connected to a solid-liquid separation system. The outlet of the solid-liquid separation system is respectively connected with the composting pond and the biogas digester, the outlet of the biogas digester is connected with the regulating pond, the outlet of the regulating pond is connected with the UASB treatment system, and the outlet of the UASB treatment system is connected with the microbial enhanced CASS treatment System connection, the outlet of the microbial enhanced CASS treatment system is connected to the sedimentation tank, the outlet of the sedimentation tank is connected to the biological oxidation pond, and the outlet of the biological oxidation pond is connected to the disinfection device.

In some embodiments of the present utility model, the solid-liquid separation system is composed of a solid-liquid separator and an air flotation tank.

In some other embodiments of the present utility model, both the biogas digester and the UASB treatment system are connected with a gas collection device.

In other embodiments of the present utility model, the disinfection device is ultraviolet disinfection.

The beneficial effects in the utility model are:

1. The biogas collected by the gas collection device after being treated by the biogas digester and UASB treatment system can provide energy for the disinfection device, which greatly saves costs. It can also be used as an energy source for lighting, cooking, power generation, etc.

2. The CASS treatment system is strengthened with specific microbial strains, which effectively improves the degradation rate of the CASS treatment system for organic matter such as cellulose and ammonia nitrogen in wastewater, and improves the efficiency of wastewater treatment.

3. The wastewater treated by the system can meet the discharge standard in the "Discharge Standard of Pollutants for Livestock and Poultry Breeding Industry" (GB18596-2001) directly, and will not affect the environment. At the same time, the compost produced in the process of the system is passed After processing, it can also be used in agricultural planting to achieve rational utilization of resources.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is a structural schematic block diagram of a dairy farm wastewater comprehensive treatment system proposed by the utility model.

In the figure: 1-water inlet equipment, 2-mechanical grille, 3-solid-liquid separation system, 4-composting tank, 5-digester, 6-conditioning tank, 7-UASB treatment system, 8-gas collection device, 9 -Microbial enhanced CASS treatment system, 10-sedimentation tank, 11-biological oxidation pond, 12-disinfection device.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Referring to Fig. 1 , a comprehensive wastewater treatment system for dairy farms includes a water inlet device 1, the outlet of the water inlet device 1 is connected to a mechanical grille 2, and the outlet of the mechanical grille 2 is connected to a solid-liquid separation system 3 , the outlet of the solid-liquid separation system 3 is respectively connected with the compost pond 4 and the biogas digester 5, the outlet of the biogas digester 5 is connected with the regulating pond 6, the outlet of the regulating pond 6 is connected with the UASB treatment system 7, and the UASB The outlet of the treatment system 7 is connected with the microbial enhanced CASS treatment system 9, the outlet of the microbial enhanced CASS treatment system 9 is connected with the sedimentation tank 10, and the outlet of the sedimentation tank 10 is connected with the biological oxidation pond 11, and the biological oxidation pond 11 The outlet of the outlet is connected with the disinfection device 12, and the treated water sterilized by the disinfection device 12 can be directly discharged or reused; the solid-liquid separation system 3 is composed of a solid-liquid separator and an air flotation tank, and the solid-liquid separation system 3 will solidify the waste water. Liquid separation treatment, the separated wastewater is discharged into the biogas tank 5 through the sewage pipe, and the residue is discharged into the compost tank 4; the biogas tank 5 and the UASB treatment system 3 are all connected with the gas collection device 7; the disinfection device 11 is ultraviolet disinfection.

The dairy farm wastewater flows through the water inlet equipment 1 (pipeline) through the mechanical grille 2, and then enters the solid-liquid separation system 3 after passing through the mechanical grille 2 to remove most SS and bulk waste. The solid-liquid separation system 3 is composed of a solid-liquid separator and an air flotation tank. The solid-liquid separator 3 can separate solid residues such as feces, reduce the follow-up process and reduce costs, and the separated solid residues such as feces will enter the composting tank 4. Others Part of it will enter the air flotation tank, the air flotation tank is connected to the biogas tank 5, and the biogas tank 5 is connected to the gas collection device 8 to recover available biogas resources. The biogas digester 5 is connected with the regulating pond 6, and the regulating pond 6 is provided with a water valve to adjust the water volume in the pond. The regulating tank 6 is connected with the UASB treatment system 7. The UASB treatment system 7 will acidify and hydrolyze the refractory polymer organic matter, and then oxidize it into ammonia nitrogen, sulfide, carbon monoxide, etc., and the unit acid formed after part of the hydrolysis will be converted into biogas. The pipe enters the gas collection device 8 to be recycled. After passing through the UASB treatment system 7, the water flowing out will enter the microbial enhanced CASS treatment system 9, adding specific microbial strains that are highly effective in degrading ammonia nitrogen and cellulose total phosphorus. In the microbial enhanced CASS treatment system 9, the organic matter is accelerated by aeration. The metabolism of cellulose and other organic matter and ammonia nitrogen are degraded, and the microbial strains added in the microbial enhanced CASS treatment system 9 are denitrification and denitrification bacteria, as well as phosphorus accumulating bacteria and cellulose degrading bacteria, which effectively improve the waste water. Treatment efficiency, the wastewater treated by microorganisms will pass through the sedimentation tank 10, and the activated sludge and suspended impurities will be removed by gravity sedimentation, and the obtained supernatant will be transported to the biological oxidation pond 11, purified by the biological oxidation pond 11 and then passed through The sterilizing device 12 performs sterilizing treatment, and the obtained water can meet the relevant requirements of the discharge standard in the "Discharge Standard of Pollutants for Livestock and Poultry Breeding Industry" (GB18596-2001), and can be directly discharged or recycled.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (4)

1. A comprehensive wastewater treatment system for dairy farms, characterized in that: it includes water inlet equipment, the outlet of the water inlet equipment is connected with a mechanical grille, and the outlet of the mechanical grille is connected with a solid-liquid separation system, the The outlet of the solid-liquid separation system is respectively connected to the composting tank and the biogas tank, the outlet of the biogas tank is connected to the regulating tank, the outlet of the regulating tank is connected to the UASB treatment system, and the outlet of the UASB treatment system is connected to the microbial enhanced CASS treatment system The outlet of the microbial enhanced CASS treatment system is connected to the sedimentation tank, the outlet of the sedimentation tank is connected to the biological oxidation pond, and the outlet of the biological oxidation pond is connected to the disinfection device. 2. A dairy farm wastewater comprehensive treatment system according to claim 1, characterized in that: said solid-liquid separation system consists of a solid-liquid separator and an air flotation tank. 3. A dairy farm wastewater comprehensive treatment system according to claim 1, characterized in that: the biogas digester and the UASB treatment system are both connected to a gas collection device. 4. A dairy farm wastewater comprehensive treatment system according to claim 1, characterized in that: said disinfection device is ultraviolet disinfection.