CN107162321A - A kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement - Google Patents

Abstract

The invention discloses an integrated manure treatment method and equipment for livestock and poultry farms based on dry manure cleaning. In this method, the solid-liquid separation of livestock and poultry manure is carried out first, and then the solid manure and fecal sewage are treated separately. The steps of processing livestock and poultry manure include: mixing with straw, feeding, anaerobic dry fermentation, and sequential treatment of discharging. The steps of the sewage include: sequential treatment of water inflow, anaerobic fermentation, aerobic pond, artificial wetland, and effluent. At the same time, the equipment for realizing the method of manure treatment is disclosed. The equipment is composed of a dry manure treatment system, a sewage treatment system and biogas purification. system composition. The invention realizes the continuous treatment of livestock and poultry manure by means of continuous airtight feeding and discharging, and uses an efficient anaerobic system to treat sewage, which can reduce the site area required for the manure dump, improve the gas production efficiency and the stability of the system operation, and ensure The stable and up-to-standard discharge of aquaculture sewage treatment can also reduce the cost of manure treatment.

Description

An integrated manure treatment method and equipment for livestock and poultry farms based on dry manure cleaning

technical field

The invention belongs to the field of treatment of livestock and poultry breeding manure. It relates to a biogas dry fermentation device and a high-efficiency anaerobic system. It is an integrated manure treatment method and equipment for livestock and poultry farms based on dry manure cleaning. Specifically, it uses manure as a raw material for anaerobic fermentation treatment. Equipment for manure treatment.

Background technique

In recent years, economic development has accelerated the development of livestock and poultry breeding industry, resulting in a large amount of livestock and poultry manure, which not only pollutes the environment, but also affects the sustainable development of the breeding industry. At present, large-scale aquaculture production occupies a dominant position, and the manure treatment process of these farms is particularly important.

At present, according to the way of cleaning manure in farms, there are mainly two ways of washing manure with water and dry manure. The dry manure cleaning method is mainly to divert the manure after it is produced. The dry manure is cleaned and collected mechanically or manually, while the urine and flushing water flow out from the sewer and are treated separately. The dry manure method has the advantages of low water content in the collected solid manure, small loss of nutrients in the manure, high fertilizer value, and is convenient for high-temperature composting or other methods of treatment and utilization; less water consumption, less sewage generated, and pollutants in the sewage It has the advantages of low content and easy purification treatment, so it has become the main way of cleaning manure in large-scale farms in my country.

However, the currently disclosed patents deal with livestock manure and sewage, respectively. The patent application number 201610399753.3 discloses a livestock and poultry manure treatment system, which uses a drum dryer to dry the solid-liquid separated livestock and poultry manure. The method uses a drum dryer to treat high energy consumption and does not involve sewage treatment after solid-liquid separation. The patent application number 201510832702.0 discloses an animal manure treatment system, which also adopts the method of drying to process manure, and at the same time, because it uses solid-liquid separation, its energy consumption is higher. The patent with the application number 201210593996.2 discloses a feces treatment device, which involves an aerobic fermentation tank. The feces are fed from the top and discharged from the bottom. The upper part is equipped with an air blower. In order to improve the fermentation efficiency, a vertical stirring shaft is added. , this treatment method uses aerobic fermentation to process feces, which has high energy consumption, and at the same time, the stability of the system is not high due to the addition of the stirring shaft, and this method also does not involve the treatment of feces and sewage. The patent with the application number 201610635238.0 discloses a breeding sewage treatment method and a breeding sewage treatment system. The method of combining biochemical treatment and advanced oxidation is used to treat the breeding sewage. The treatment efficiency is high, but the treatment cost is high.

In application promotion, high treatment efficiency and energy saving are the key points. Therefore, how to effectively improve the efficiency of manure treatment, how to reduce labor force and efficiently use limited resources in the treatment process is an urgent problem to be solved.

Contents of the invention

The purpose of the present invention is to provide an integrated treatment method and equipment for manure and sewage under the dry-cleaning mode of large-scale farms for the problems of low fecal sewage treatment efficiency and high construction and operation costs in existing large-scale farms. The joint treatment of manure and manure provides a technical solution for the integrated treatment of manure and sewage for large-scale farms.

In order to achieve the purpose of the present invention, the present invention provides an integrated treatment method for manure and sewage under the method of dry manure cleaning in large-scale farms, wherein the manure treatment is carried out in the following order: mixing manure and straw, feeding, anaerobic dry fermentation , discharge, compost; manure flushing water treatment is carried out in the following steps: solid-liquid separation, water inflow, anaerobic fermentation, aerobic pond, artificial wetland, and water outflow.

Among them, the solid part of the feces flushing water after solid-liquid separation is mixed with the feces, the leachate produced by the dry fermentation of the feces is mixed with the feces flushing water, and the effluent of the fecal flushing water is returned to the feces as a spray liquid after anaerobic fermentation. Oxygen dry fermentation stage.

Wherein, the straw is crushed before being mixed with the feces, the crushed particle size is 0.5-1.5 cm, preferably 1 cm, and the mixing ratio of the dry mass of the straw and the feces is 1:1-1:5 (w/w), preferably 1: 3(w/w).

Wherein, the anaerobic dry fermentation process of feces can be sequential batch anaerobic dry fermentation and continuous anaerobic dry fermentation, preferably continuous anaerobic dry fermentation; the fermentation temperature of the continuous anaerobic dry fermentation process is 30-56 ° C, It is preferably 35-42°C, the solid residence time (SRT) is 15-40 days, preferably 20 days, and the spray volume is 0.1-1L/kgTS/day, preferably 0.2L/kgTS/day; the continuous anaerobic After the solid-liquid separation of the biogas residue discharged daily in the dry fermentation process, the solid part is refluxed as an inoculum and mixed with feces and straw, and the inoculum ratio is 0.5-3, preferably 1.

Wherein, the anaerobic fermentation process of excrement flushing water can be UASB, IC, EGSB and other anaerobic processes, preferably UASB process, and the hydraulic retention time (HRT) is 8-36h, preferably 12h.

Another aspect of the present invention provides an integrated manure treatment equipment for livestock and poultry farms based on dry manure cleaning, which mainly includes a manure treatment system (1), a sewage treatment system (2) and a biogas purification system (3).

Among them, the feces treatment system consists of a feces and straw mixed feeding system (101), a continuous anaerobic dry fermentation system (102), a discharge system (103), and a spraying system (104). The feces and straw mixed feeding system ( 101) Connect with the continuous anaerobic fermentation system (102) through the screw pump (101c), the continuous anaerobic dry fermentation system (102) is provided with a spraying device (102a), and the continuous anaerobic fermentation system (102) has a thermal insulation tank outside wall (102b); the bottom of the continuous anaerobic fermentation system (102) is provided with an extrusion type screw discharger (102c), and the solid outlet of the extrusion type screw discharger (102c) is connected to the biogas residue tank (103b), and the biogas residue tank The biogas residue in (103b) is returned to the feces and straw mixed feeding system (101); the spraying device (102a) is connected to the high-efficiency anaerobic treatment system (203) through a pump (203e).

Among them, the sewage treatment system (2) is mainly composed of a solid-liquid separation system (201), a water intake system (202), an efficient anaerobic treatment system (203), an aerobic pond (204), and a constructed wetland system (205). The liquid outlet of the extruding screw discharger (102c) at the bottom of the anaerobic fermentation system (102) is connected to the regulating tank (202b), and the sewage in the regulating tank (202b) is connected to the bottom of the high-efficiency anaerobic treatment system (203) through the pump (202c) The water distributor (203a), the treated sewage enters the spraying device (102a) of the continuous anaerobic fermentation system (102) through the return pump (203e), and the rest flows through the aerobic pond (204) and the artificial wetland respectively. (205) after discharge.

Specifically, compared with the prior art, the present invention has the following advantages:

1) The manure treatment equipment of livestock and poultry farms under the dry manure cleaning method in the present invention adopts a continuous fermentation method, and uses a screw pump to transport materials into the fermentation system, avoiding long-term piling of manure and reducing the construction cost of the farm. Improve the sanitation level of farms.

2) The present invention improves the C/N of continuous anaerobic dry fermentation and high-efficiency anaerobic treatment of sewage by adding straw and mixing dry fermentation leachate with feces and sewage, respectively, and improves the anaerobic fermentation efficiency of feces and sewage.

3) The present invention can realize full automation, reduces labor and reduces the operating cost of the farm.

Description of drawings

Fig. 1 is a schematic diagram of the equipment structure of the livestock and poultry farm integrated manure treatment method under the dry manure mode;

Fig. 2 is the schematic diagram of the equipment purification device of the livestock and poultry farm integrated manure treatment method under the dry manure mode;

As shown in the figure, 1—dry manure treatment system, 2—sewage treatment system, 3—biogas purification system, 101—dry manure and straw mixed feeding system, 101a—motor, 101b—screw auger, 101c—screw pump , 102—continuous anaerobic fermentation system, 102a—spraying device, 102b—insulation tank wall, 102c—extrusion screw discharge machine, 103—discharging system, 103a—biogas slurry outlet, 103b—biogas residue Tank, 103c—big residue return pump, 104—spray system, 201—solid-liquid separation system, 202—water inlet system, 202a—Y-type filter, 202b—storage tank, 202c—pump, 203—high-efficiency anaerobic system , 203a—water distributor, 203b—sludge bed area, 203c—three-phase separator, 203d—gas collection chamber, 203e—biogas slurry return pump, 204—aerobic pond, 205—constructed wetland, 301—dehydration tank, 302—desulfurization tank, 303—gas flow meter.

detailed description

The specific structure and working process of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the structure diagram of integrated manure treatment equipment for livestock and poultry farms under the dry manure cleaning method, the manure from large-scale farms is firstly subjected to solid-liquid separation, and the solid manure and straw produced by solid-liquid separation After mixing, it is sent to the dry manure treatment system (1) through the dry manure and straw mixed feeding system (101) for anaerobic fermentation treatment, and the manure and sewage generated by solid-liquid separation enters the sewage treatment system (2) for treatment.

In the dry manure treatment system (1), the mixed raw material of solid manure and straw is sprayed by the biogas slurry return pump (203e) during the anaerobic fermentation process. The spray liquid is the effluent of the sewage treatment system (2), and the solid manure After anaerobic fermentation with straw in the continuous anaerobic fermentation system (102), it is discharged from the discharge system (103), and the solid-liquid separation operation is performed by the extruding screw discharge machine (102c), and the biogas produced after solid-liquid separation The slag part is returned to the mixed feeding system (101) as an inoculum to be mixed with the mixed raw materials, and the remaining part is discharged, and the biogas slurry produced by solid-liquid separation is mixed with the fecal water produced by solid-liquid separation of feces and passed through the Y-type filter (202a) After filtering, it enters the storage tank (202b), and is pumped into the high-efficiency anaerobic system (203) by the pump (202c) through the water distributor (203a) for treatment.

The biogas generated by the continuous anaerobic fermentation system (102) and the high-efficiency anaerobic system (203) is mixed and then enters the biogas purification system (3) for purification treatment.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. a kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement, it is characterised in that night soil-treatment is pressed Following steps order is carried out：Excrement is mixed with stalk, fed, anaerobic dry fermentation, discharging, backflow or discharge；At excrement dirt flushing water Order is carried out reason as follows：Separation of solid and liquid, water inlet, anaerobic fermentation, water outlet, aerobic ponds or artificial swamp advanced treating.

2. a kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement, its feature described in claim 1 It is solid portion and excrement mixed processing after the dirty flushing water separation of solid and liquid of excrement, the percolate that excrement dry fermentation is produced is dirty with excrement Water outlet is back to the excrement anaerobic dry fermentation stage as spray liquid after flushing water mixed processing, excrement dirt flushing water anaerobic fermentation.

3. a kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement, its feature described in claim 1 Be stalk before being mixed with excrement by crushing, powder particle diameter is in 0.5~1.5cm, preferably 1cm, stalk and excrement dry mass Mixed proportion is 1:1~1:5 (w/w), preferably 1:3(w/w).

4. a kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement, its feature described in claim 1 The anaerobic dry fermentation technique for being excrement can be batch-type anaerobic dry fermentation and continuous anaerobic dry fermentation, preferably continuous anaerobism Dry fermentation；The fermentation temperature of the continuous anaerobic dry fermentation technique is 30~56 DEG C, preferably 35~42 DEG C, solid retention time (SRT) it is 15~40 days, preferably 20 days, spray flux was 0.1~1L/kgTS/ days, preferably 0.2L/kgTS/ days；The company The biogas residue that continuous anaerobic dry fermentation technique is discharged daily solid portion after separation of solid and liquid is used as inoculum backflow and excrement and straw Stalk is mixed, and inoculative proportion is 0.5~3, preferably 1.

5. a kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement, its feature described in claim 1 The anaerobic ferment process for being the dirty flushing water of excrement can be the anaerobic techniques such as UASB, IC, EGSB, preferably UASB techniques, waterpower Residence time (HRT) is 8h~36h, preferably 12h.

6. a kind of integrated treatment for cow manure method and apparatus of the livestock and poultry farm based on dry cleaning up excrement, main bag described in claim 1 Include：Excrement and urine treating system (1), sewage disposal system (2) and methane purifying system (3), it is characterised in that excrement and urine treating system by Excrement and stalk mixed feeding system (101), continuous anaerobic dry fermentation system (102), discharge system (103), spray system (104) constitute, sewage disposal system (2) is main by solid-liquid separation system (201), water inlet system (202), efficient anaerobic processing system Unite (203), aerobic ponds (204), artificial wet land system (205) are constituted.

7. the integrated treatment for cow manure method and apparatus of a kind of livestock and poultry farm based on dry cleaning up excrement described in claim 6, it is special Levy and be that excrement is connected with stalk mixed feeding system (101) by screw pump (101c) with continuous anaerobic fermentation system (102), Being provided with continuous anaerobic dry fermentation system (102) outside spray equipment (102a), continuous anaerobic fermentation system (102) has heat insulation tank Wall (102b)；Continuous anaerobic fermentation system (102) bottom is provided with squash type spiral discharging machine (102c), squash type spiral discharging machine Biogas residue in (102c) solid outlet connection biogas residue tank (103b), biogas residue tank (103b) is back to excrement and stalk mixed feeding system Unite (101)；Spray equipment (102a) is connected by pump (203e) with efficient anaerobic processing system (203).

8. the integrated treatment for cow manure method and apparatus of a kind of livestock and poultry farm based on dry cleaning up excrement according to claim 6, It is characterized in that continuous anaerobic fermentation system (102) bottom squeeze formula spiral discharging machine (102c) liquid outlet connection regulation tank (202b), regulation tank (202b) interior sewage connects the water distribution for entering efficient anaerobic processing system (203) bottom by pump (202c) Device (203a), the foul water fraction after processing enters the spray equipment of continuous anaerobic fermentation system (102) by reflux pump (203e) (102a), remainder flows separately through aerobic ponds (204) and artificial swamp (205) is discharged afterwards.