CN104108840B - A kind of water rushes the dirty integrated conduct method of excrement formula large-scale milch cow farms excrement - Google Patents

Abstract

A water flushing manure-type large-scale dairy farm manure comprehensive treatment method, including the following processes: 1) Send the collected manure and flushing water into the manure collection ditch, intercept, separate, temper and homogenize through the grid, Solid-liquid separation, the solid is used as bedding material in the barn after drying, and the liquid enters the temporary storage tank; 2) Part of the liquid in the temporary storage tank is sent to the anaerobic fermentation system for treatment to meet the waste water used for backwashing of the system, and the other part enters the multi-purpose tank through the sewage storage tank Level biological purification storage pond and connected to a mixed irrigation pond to adjust the water quality to the level of safe agricultural irrigation; 3) Send the dried manure to the manure dump by the dung truck, as the substrate for edible fungus culture and earthworm culture substrate, directly sold or piled After retting, decomposed manure or organic fertilizer is sold to the planting industry. The advantages of the present invention are: the method optimizes the way of water use, so that the production, discharge, treatment and utilization of sewage enter into a virtuous cycle; the process has good versatility, strong buffering and purification capabilities for sewage, and can effectively improve environmental sanitation; low operating costs, long lasting.

Description

A method for comprehensive treatment of excrement and sewage in large-scale dairy farms with water flushing

technical field

The present invention relates to agricultural resources and environmental wastewater treatment technology, in particular to a method for comprehensive treatment of excrement from large-scale dairy farms with water flushing.

Background technique

According to the Ministry of Agriculture's "National Advantageous Agricultural Products Regional Planning and Layout 2008-2015" statistics, at present, my country's per capita dairy product consumption is only equivalent to 1/4 of the world's average level and 1/12 of that of developed countries, and there is broad room for development. In recent years, with the increase in the demand for dairy products, driven by the dairy cattle advantage area, my country's dairy industry has continued to develop at a high speed, and a number of star enterprises and well-known brands have emerged, and have achieved remarkable results. The breeding volume is 14.4 million. According to the plan, it is estimated that by 2015, the national dairy cow breeding volume will reach 17 million. With the continuous expansion of the breeding scale and the increase in the number of pasture-type intensive dairy farms, the environmental pollution caused by large-scale dairy farm manure, especially the pasture-type large-scale dairy farms that use water flushing as the main manure cleaning process The large amount of high-concentration breeding manure produced is causing widespread concern in the society.

Due to the large amount of manure generated and discharged during the industrial development process has not been effectively controlled and utilized in a timely manner, resulting in a large waste of resources and threatening the quality of livestock products and the safety of the breeding environment. To this end, the national and local governments have issued a series of laws, regulations, standards and norms to constrain and promote the healthy development of the industry. On January 1, 2014, the State Council officially promulgated the "Regulations on the Prevention and Control of Pollution from Large-scale Livestock and Poultry Breeding"; Poultry Breeding Industry Pollution Prevention and Control Technical Specifications, and Livestock and Poultry Breeding Industry Pollution Control Engineering Technical Specifications to constrain and solve livestock and poultry breeding pollution problems.

Due to the particularity of the breeding and manure collection process of the large-scale dairy farm with water flushing manure, the manure of the manure exists in liquid form, and has the characteristics of high organic matter content, high nitrogen and phosphorus content, high suspended matter content, and difficult solid-liquid separation. , if it enters the environment directly without effective treatment, it will inevitably cause serious environmental pollution.

The excrement of water flushing large-scale dairy farms mainly comes from cowsheds and playgrounds; the waste water in the water flushing process mainly comes from milking parlor flushing water, waiting parlor flushing water, cow urine, cowshed floor flushing water, and summer cowshed Spray water, waste water from manure backwashing pipeline, among which waste water from manure backwashing pipeline is the main waste water source of water manure flushing process. At present, the problems in the collection and transportation of large-scale dairy farms with water flushing manure are: limited capacity of solid-liquid separation equipment, large water consumption, many water links, large amount of sewage produced and discharged, high concentration of organic matter in sewage, and suspended solids in sewage High concentration, high environmental risk for direct agricultural use.

Contents of the invention

The purpose of the present invention is to solve the above existing problems, to provide a water flushing manure type large-scale dairy farm manure comprehensive treatment method, which takes into account the classified collection and classification treatment of large-scale dairy farm manure, and has seasonal adaptability and storage And deep purification ability, it can realize the comprehensive manure treatment process combining planting and breeding.

Technical scheme of the present invention:

A method for comprehensive treatment of large-scale dairy farm manure by water flushing manure, comprising the following processes:

1) First, the feces, flushing water, summer spray water, and cow urine collected in the adult cow house are sent to the manure collection ditch of the backwashing pipeline, and after being intercepted and separated by the grid pool, they enter the regulating pool for adjustment. After adjusting and mixing, it enters the solid-liquid separator for solid-liquid separation. The solid part is sent to the drying yard to be dried and then used as a bedding material for cattle bedding, and the liquid part enters the temporary storage pool;

2) The temporary storage pool splits the liquid, and a part of it is sent to the anaerobic fermentation system for treatment to meet the wastewater used for system backflushing. The reactor enters the aerobic aeration tank to de-ammonia, detoxify and purify, so as to ensure that the back flushing water entering the breeding area will not affect the environment of the site, and the biogas generated by the anaerobic process is used as boiler fuel; the other part enters the multi-stage biological system through the sewage storage tank. Purification storage ponds, multi-level biological purification ponds include anaerobic ponds, facultative ponds, aerobic ponds and multi-level plant ponds, and the anaerobic ponds, facultative ponds and aerobic ponds of multi-level biological purification ponds are equipped with anti-seepage layers, To avoid wastewater polluting groundwater, warming greenhouses are set up for anaerobic ponds and facultative ponds in northern regions to improve the treatment efficiency of two-stage ponds, and a mixed irrigation pond is connected to the end of multi-stage plant ponds to adjust water quality to safe agricultural irrigation levels;

3) The dry manure of the bred cattle and the dry manure of the sports field are sent to the manure dump by the manure truck, and the dry manure is collected as the substrate for the cultivation of edible fungus and earthworm culture, and sold directly or sold to planters after composting to make decomposed manure or organic fertilizer industry to realize the recycling of waste resources.

Advantage and positive effect of the present invention:

1) This method fully combines the characteristics of the breeding process and the manure cleaning process of the water-washed manure dairy farm, optimizes the water use method, replaces clean water with purified reclaimed water, reduces water input and waste water production and discharge, and makes the breeding manure especially It is a virtuous circle for the production, discharge, treatment and resource utilization of sewage;

2) The process has good versatility, which can meet the water flushing type large-scale dairy farm manure treatment in different regions;

3) The system has a strong ability to buffer and purify sewage, greatly reducing the investment cost and operating burden of the farm on manure treatment, and can effectively improve the environmental sanitation of the farm and its surroundings, providing a guarantee for the development of clean farming;

4) The operating cost is low. The main goal of the system operation is to realize the agricultural use of organic manure, which greatly reduces the operating cost and investment cost compared with the realization of the discharge target;

5) The system has a high degree of automation and simple operation and maintenance. The operation of the entire system only requires part-time operation, and no fixed personnel are required;

6) Perfect technology and long service life of the system.

Description of drawings

Figure 1 is a process flow diagram of the comprehensive treatment method.

Detailed ways

Example:

A method for comprehensive treatment of excrement in large-scale dairy farms by water flushing, as shown in Figure 1, comprising the following processes:

1) First, the feces, flushing water, summer spray water, and cow urine collected in the adult cow house are sent to the manure collection ditch of the backwashing pipeline, and after being intercepted and separated by the grid pool, they enter the regulating pool for adjustment. After adjusting and mixing, it enters the solid-liquid separator for solid-liquid separation. The solid part is sent to the drying yard to be dried and then used as a bedding material for cattle bedding, and the liquid part enters the temporary storage pool;

2) The temporary storage pool splits the liquid, and a part of it is sent to the anaerobic fermentation system for treatment to meet the wastewater used for system backflushing. The reactor enters the aerobic aeration tank to de-ammonia, detoxify and purify, so as to ensure that the back flushing water entering the breeding area will not affect the environment of the site, and the biogas generated by the anaerobic process is used as boiler fuel; the other part enters the multi-stage biological system through the sewage storage tank. Purification storage ponds, multi-level biological purification ponds include anaerobic ponds, facultative ponds, aerobic ponds and multi-level plant ponds, and the anaerobic ponds, facultative ponds and aerobic ponds of multi-level biological purification ponds are equipped with anti-seepage layers, To avoid wastewater polluting groundwater, warming greenhouses are set up for anaerobic ponds and facultative ponds in northern regions to improve the treatment efficiency of two-stage ponds, and a mixed irrigation pond is connected to the end of multi-stage plant ponds to adjust water quality to safe agricultural irrigation levels;

3) The dry manure of the bred cattle and the dry manure of the sports field are sent to the manure dump by the dung truck, and the dry manure is collected as the substrate for the cultivation of edible fungus and earthworm culture, and sold directly or sold to planters after composting to make decomposed manure or organic fertilizer industry to realize the recycling of waste resources.

This method fully combines the characteristics of the breeding process and the manure cleaning process of the water flushing dung dairy farm. The production arrangement, treatment and resource utilization of the products have entered into a virtuous circle, and the use is good, with significant technical and economic effects.

Claims (1)

1. water rushes the dirty integrated conduct method of excrement formula large-scale milch cow farms excrement, it is characterized in that comprising following technique:

1) ight soil first Grown cow house collected, punching circle water, summer spray water, the unified excrement dirt sending into the pipeline that backwashes of ox urine collects ditch, through the interception of grating tank after being separated, enter equalizing tank and carry out modified homogenate, enter solid-liquid separating machine after regulating mixing and carry out solid-liquid separation, solid part is sent to airing field and dries and be back to cowshed as ox bed padding afterwards, and liquid portion enters scratch pool;

2) scratch pool is by separating liquid process, a part is sent to anaerobic fermentation system process and backwashes the waste water of consumption to meet system, this effluent part through between solar heating, one-level anaerobic reactor, delivery system, secondary anaerobic reactor enter aerobic aeration pond and purify with deamination detoxification, guarantee enters culture zone backwash water can not have influence on place environment, and the biogas that anaerobic process produce is used as boiler oil; Another part enters multi-stage biological purification and stores the pool through sewage storage pond, multi-stage biological purifying pond comprises anaerobic pond, facultative lagoon, aerobic ponds and multistage Plant Pond, the anaerobic pond of multi-stage biological purifying pond, facultative lagoon and aerobic ponds are provided with impervious barrier, avoid contaminated wastewater underground water, northern area is that anaerobic pond and facultative lagoon setting heat greenhouse to improve the processing efficiency on the two-stage pool, and multistage Plant Pond end connects a mixed pond regulating water quality of filling with to safe agriculture grouting horizontal;

3) growing cattle is done clear excrement and playground and is done clear excrement and be sent to heap middenstead by fortune dung-cart, collect dry clear excrement to sell as edible fungus culture medium and earthworm cultivation substratum, directly or sell to plant husbandry, to realize changing rejected material to useful resource recycle after heap retting becomes thoroughly decomposed fertilizer or fertilizer.