JP2002084908A - Pigpen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pigpen solving the problems that operations for dealing with pig excreta including dung removal and contaminated water cleanup at pigpens in the pig-raising farm are often associated with difficulties, and occurrence of pollution due to bad odor and the generation of sanitary insect pests such as flies, adverse effects on pig growth due to the daily difference of both the temperature and humidity and the generation of harmful and odorous gas and, unpleasant feeling for workers, difficulties of operating septic tanks under low water temperature in winter in cold districts and the shortage of sites for septic tanks exist. SOLUTION: This pigpen is so designed that the floor thereof is constructed of concrete drain-board with narrow slits or metal or synthetic resin with netty slits so as to allow discharged excreta and washings to fall down via the slits, being characterized by that septic tanks with activated sludge system of oxidation ditch type are installed for receiving such discharged excreta and washings fallen down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pig house three-dimensionally integrated with a septic tank on a pig farm.

[0002]

2. Description of the Related Art In a conventional pig farm on a pig farm, excreta and washing water excreted in the pig barn are discharged out of the pig barn and then subjected to treatment such as purification of sewage and composting and fermentation of solids. The floor of the piggery is made of concrete floor with narrow gaps (slits) or metal or synthetic resin with mesh-shaped gaps (hereinafter collectively referred to as "snow floors"), and below it It is equipped with a scraper called a dung scraper and a urine discharge pipe, and the dung and urine are separated inside the pig house and taken out of the pig house. There are many examples.

[0003] In any case, since a considerable time elapses after the pig excretes manure and the predetermined treatment is performed, and these are performed in an open space, the generation of bad smell inside and outside the pig house due to putrefaction and the like. There are many pollution complaints due to the occurrence of sanitary pests such as flies, and the generation of gas such as ammonia in the piggery is a hindrance to the growth of pigs, which is not favorable as a working environment for workers working on pig farms. In addition, in the case of a manure separation type pig house in a pig house, repair work in case of failure of the feces removal machine such as the above scraper is very painful, and the presence of the scraper is under the floor of the pig house and the manure outlet outside the pig house. And it is difficult to maintain the hermeticity of the pig house, and therefore it is difficult to adjust the temperature and humidity in the pig house. Furthermore, a lot of land area is required for the septic tank outside the pig house, and it is extremely difficult to keep the water temperature inside the outdoor septic tank at an appropriate level in a cold region, and it is difficult to maintain the function of the septic tank.

[0004]

The problem of the generation of malignant gas inside and outside the pig house, the occurrence of sanitary pests such as flies, and the resulting deterioration of the environment for pigs and humans and pollution, include the purification of excreted manure and compost fermentation. This is a phenomenon that occurs due to staying inside and outside the pig barn until the treatment is performed.

[0005] Difficulty adjusting the room temperature and humidity in the piggery and the repair work of the dung removal machine are problems that occur because the manure is to be separated in the piggery.

[0006] If a purification facility is to be provided outside the pig house, a separate site from the pig house is required. In addition, septic tanks that are provided independently outdoors are difficult to maintain an appropriate water temperature in winter, especially in cold regions.

[0007] There is a strong demand to solve the above problems, and the present invention has been made in view of such circumstances, and excreted manure and washing water stay in and out of a piggery. It is an object of the present invention to provide a pig house in which an activated sludge septic tank is installed in the pig house so that it is not necessary to carry it out of the pig house.

[0008]

Means for Solving the Problems The above-mentioned problem is caused by the fact that excreted manure is subjected to purification treatment or compost fermentation treatment in a place and facility different from the pig house, so that the excreted manure can be put in and out of the pig house before being treated. Manure and washing water accumulate, and occur because a discharge device such as a dung removal machine is installed under the floor of the piggery.

Therefore, in a pig barn with a floor such as a snowboard,
Oxidation ditch type activated sludge septic tank is installed under the floor so that excreted manure and washing water fall from the gap and are immediately mixed with aerated sludge and purified. (Purification) of BOD, oxidation of ammonia nitrogen to nitrous acid and nitric acid, and reduction of nitrous acid and nitric acid to nitrogen gas. The treated water after the activated sludge is settled out is taken out by a removal device such as a pump. It is configured as follows.

That is, according to the first aspect of the present invention, the floor is formed of a concrete saw with a narrow gap (slit) or a metal or synthetic resin having a mesh-shaped gap, and excrement and washing water excreted from the gap are formed. The pig house, wherein an activated sludge method septic tank of an oxidation ditch (oxidation ditch) type for receiving manure and washing water dropped from the floor under the floor is installed in the falling pig house. The septic tank has a BOD volume load of 0.1 to
A pigsty of claim 1, wherein the capacitance of 0.3 kg / m 3 ^· day, the invention of claim 3, wherein the septic tank, as supplementary devices, aeration and stirring apparatus that can control the time and intensity of aeration,
The pig house according to claim 1, further comprising a device for removing treated water, a device for removing coarse suspended solids such as undigested food waste contained in feces, and a device for removing excess activated sludge. The operation of the septic tank is performed in a batch mode of intermittent aeration which is repeated by dividing aeration / agitating time (aerobic condition), aeration stop / standing, activated sludge sedimentation time (anaerobic condition), and treatment water supernatant removal time. According to a third aspect of the present invention, there is provided the piggery according to the third aspect, wherein the operation of the septic tank is performed by continuously performing aeration and stirring.
The invention of claim 4 is a piggery according to claim 4, wherein the device for taking out treated water is a pump or a drain valve, and using this, takes out the supernatant treated water after aeration stoppage, standing, and sludge sedimentation time,
The invention according to claim 7 is the piggery according to claim 5, wherein the apparatus for removing treated water is a microfiltration membrane, which is installed in a septic tank or in a separate tank. ,
The pig house according to claim 3, wherein the septic tank is further provided with a dissolved oxygen concentration meter, a redox potential meter, and a hydrogen ion concentration meter.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to FIGS. These figures are schematic structural diagrams for explaining a pig house integrated with an activated sludge process septic tank of an oxidation ditch (oxidation ditch) type. FIG. 1 is a cross-sectional view of a pig house of the present invention, and FIG. FIG. 3 is a perspective view showing a part of the configuration of the septic tank and the floor of the mushroom, FIG. 3 is a plan view of the septic tank installed under the floor of the piggery, and FIG. 4 is a vertical sectional view of the piggery of the present invention and a configuration diagram of an auxiliary device.

The pig house 1 has a building 2, a pig tub 3, a floor 4 on which manure falls naturally through gaps such as a snowboard, and an activated-sludge-type purification tank 5 in the form of an oxidation ditch below the floor.

An activated sludge process septic tank of the oxidation ditch type (hereinafter referred to as “O
D method) is a purification method with a long history,
As shown in Fig. 2, a shallow treatment tank with a depth of about 2 m is constructed in a donut-shaped oval shape, and activated sludge liquid is splashed into the air by a Kessner brush or the like installed on the surface of the water to contact oxygen to take in oxygen (aeration) ) Together with a horizontal flow of water to stir and mix the activated sludge liquid and the inflowing raw water is the original form of this method. There are a batch type in which aeration, aeration stop, sludge sedimentation, and removal of treated water are performed in one treatment tank, and a continuous type in which treated water is removed in a separate sedimentation tank provided with continuous aeration.

The OD method requires a relatively small amount of aeration power and is easy to operate. However, it has a disadvantage that it requires a large land area because of its shallow water depth, and is susceptible to the outside air temperature because of its large surface area. is there. However, by putting the pig house on the septic tank (oxidized ditch) and integrating it, the disadvantage that the septic tank is easily affected by the outside temperature is also eliminated.

The building 2, the pig bunches 3, and the floor 4 are of a required type such as structure, flat area, floor material and the like according to the purpose of breeding pigs.

It is preferable that the septic tank 5 has an effective capacity of 0.1 to 0.3 kg / m ³ · day (BOD volume load). Generally, in the design of an activated sludge septic tank, the BOD volume load is less than 0.3 kg / m ³ · day.
A medium-to-high load design of kg / m ³ · day or more can be taken. During~
In a high-load design, the required tank capacity is small, but operation is difficult, and problems such as insufficient oxygen, poor sedimentation of activated sludge, and foaming are likely to occur. On the other hand, the operation is easier with a medium to low load design, and at the same time, the oxidation of ammonia nitrogen to nitrite and nitric acid and the reduction of nitrous acid and nitric acid to nitrogen gas can be performed in batch operation at a high level.

One of the objects is to prevent troubles such as foaming from occurring because pigs live in a pig house integrated with the septic tank of the present invention, and to suppress the generation of malignant gas such as ammonia gas. Therefore, denitrification is also important. This is why it is preferable to design the BOD volume load of the OD method as low as possible.

The number, length, width and depth of the tanks are determined according to the contents of the pigs to be bred and the planar shape of the pig house, and a part of the tanks may protrude outside.

The septic tank 5 includes an aeration / stirring device 6, a treated water take-out device 7, a sludge take-out device 8, a device 9 for removing coarse suspended solids, a dissolved oxygen concentration meter (DO meter), and an oxidation-reduction potentiometer (ORP meter). A sensor 10 such as a hydrogen ion concentration meter (pH meter) and a control panel 11 are provided.

The aeration / stirring device 6 is a device for introducing oxygen into the septic tank 5 and for horizontally flowing the activated sludge water. The aeration / stirring device is selected or combined with a floating type, an underwater ejector type, an underwater mixer type, etc., according to the required amount of introduced oxygen and flow rate.

The operation of the septic tank 5 includes aeration and stirring times (aerobic conditions), aeration stop, standing, and sludge settling times (anaerobic conditions).
It is preferable to use a batch-type operation of intermittent aeration which is repeated while separating the supernatant time of the treated water, but it is also possible to use a continuous operation in which aeration and stirring are continuously performed. As an example of batch-type operation, the daytime when pigs are active and excrete excreta are aerated during aerobic conditions (aerobic conditions), and the nighttime when aeration is stopped (anaerobic conditions), the oxidation of BOD and the oxidation and reduction of ammonia nitrogen are considered. It is configured to remove the treated water after the activated sludge has been settled at the end of the aeration stop time by denitrification and a removal device such as a pump.

In the case of batch-type operation, the treated water take-out device 7 is operated after stopping aeration, standing still, and activated sludge sedimentation by a submersible pump or a drain valve installed near the water surface to take out treated water (supernatant water) or batch treatment. When a higher quality of treated water is required in a batch operation or a continuous operation, a microfiltration membrane is selected. Installing a microfiltration membrane in an oxidizing groove or in a separately provided tank and using it as a treated water take-out device is a continuous operation without separately installing a sedimentation tank, or when a higher treatment water quality is required preferable.

The microfiltration membrane is a filter having fine gaps capable of separating bacteria-sized particles and water, and has recently become popular as a method for separating activated sludge from treated water. In comparison, activated sludge is hardly mixed into the treated water, so that a high treated water quality can be obtained.

The sludge removal device 8 selects a submersible pump or a drain valve installed at the bottom of the tank.

The coarse suspended solids removing device 9 is composed of a submersible pump and a screen, and the activated sludge in the tank is circulated through the screen to remove coarse dust contained in feces.

Sensor 1 such as DO meter, ORP meter, pH meter, etc.
0 is set in the activated sludge liquid 12 in the tank, and is displayed on a recorder and a meter attached to the control panel, and the aeration intensity and the aeration time are controlled by referring to these data.

The maintenance and management of swine wastewater purification by activated sludge is based on inflow load, activated sludge amount, aeration intensity and timing,
It can be said that the balance of the four factors of the nitrogen content is controlled, but it is difficult to make a judgment depending only on human sensation such as visual observation. For this purpose, scientific management can be performed by reading numerical values and waveforms of dissolved oxygen (DO), redox potential (ORP), and hydrogen ion concentration (pH) sensed by the sensor.

The value of DO indicates the degree of consumption of oxygen fed into the activated sludge, and B is obtained from the waveform in batch operation.
The progress of the oxidation of OD and ammonia can be estimated, and at the same time, the appropriateness of the input oxygen amount can be determined.

The value of ORP has a positive potential (oxidation) and a negative potential (reduction) at the boundary of zero. During the aeration, the value changes in the positive direction, and the progress of oxidation of BOD and ammonia can be estimated. Can be estimated in a minus direction, and the state of denitrification in which nitric acid and nitrous acid generated by the oxidation of ammonia are reduced to nitrogen gas can be estimated.

As the pH value increases around 7 (neutral), the pH value is alkaline, and when the pH value is low, it is acidic.

The pH of the activated sludge fluctuates due to the oxidation and reduction of ammonia and organic acids contained in the wastewater.

Activated sludge is an aggregate of bacteria,
Since it functions normally in an environment close to pH 7, it is possible to estimate the so-called health of activated sludge by monitoring the pH value.

The operation of the motors of the above device is controlled by a control panel 11.

[0034]

According to the pig bar of the present invention integrated with the septic tank, the excrement and washing water excreted by the pig are immediately mixed with the activated sludge, aerated and purified, and do not stay inside or outside the pig bar in a state that leads to putrefaction. No gas is generated, and no sanitary pests such as flies grow. Since no dung removal facility such as a scraper is required, these installation costs and maintenance work are unnecessary. Since the heat capacity of the water in the septic tank is large, it has a buffering capacity against fluctuations in the outside air, and at the same time, water evaporates from the surface of the water, leveling the temperature and humidity in the piggery. Since the septic tank is covered by a building, it is not directly affected by low-temperature outside air in cold regions.
Since the septic tank and the piggery are configured as three-dimensional, the land for sewage treatment facilities can be saved. As described above, the growing environment of pigs is remarkably improved as compared with the conventional pig barn, and the working environment of employees working on the farm is also significantly improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pigger of the present invention.

FIG. 2 is a perspective view showing a part of a configuration of a septic tank and a mushroom floor.

FIG. 3 is a plan view of a septic tank installed under the floor of a piggery.

FIG. 4 is a vertical cross-sectional view of a pig house of the present invention and a configuration diagram of an auxiliary device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pig house 2 ... Building 3 ... Pig bun 4 ... Floor where manure and washing water, such as a snowboard, fall naturally 5 ... Oxidation groove type purification tank under the floor 6 ... Aeration / stirring device 7 ... Treated water removal device 8 ... Sludge removal device 9 ... Coarse suspended solids) removal device 10 ... Sensors such as dissolved oxygen concentration meter, redox potential meter and pH meter 11 ... Control panel 12 ... Activated sludge liquid

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B101 AA04 CA08 CB04 EB13 4D006 GA07 HA93 KA02 KB22 KB23 PA01 PB08 PC63 4D029 AA03 AA04 AA09 AB05 BB04 BB10 DD03 4D040 BB54 BB67 BB91 BB92

Claims (8)

[Claims] 1. A pig barn in which a floor is made of concrete saw with a narrow gap (slit) or metal or synthetic resin having a mesh-shaped gap, and excrement and washing water excreted from the gap fall under the floor. A pig house equipped with an activated sludge process septic tank of the oxidation ditch type, which receives excrement and washing water dropped from the floor. 2. The septic tank has a BOD volume load of 0.1 to 2.
The piggery according to claim 1, wherein the capacity is 0.3 kg / m ³ · day. 3. The septic tank, as an auxiliary device, an aeration / stirring device capable of controlling the time and intensity of aeration, a device for removing treated water, and a device for removing coarse suspended solids such as undigested food waste contained in feces. The piggery according to claim 1, further comprising a device for extracting excess activated sludge. 4. The operation of the septic tank includes batching of intermittent aeration repeated by dividing aeration / agitating time (aerobic condition), aeration stop / standing, activated sludge sedimentation time (anaerobic condition), and supernatant removal time of treated water. The piggery according to claim 3, which is performed by a formula. 5. The piggery according to claim 3, wherein the operation of the septic tank performs aeration and stirring continuously. 6. The piggery according to claim 4, wherein the treated water take-out device is a pump or a drain valve, and uses this to take out the supernatant treated water after aeration stoppage, standing, and sludge sedimentation time. 7. The piggery according to claim 5, wherein the device for taking out the treated water is a microfiltration membrane, which is installed in a septic tank or a separately provided tank. 8. The purifying tank further comprises a dissolved oxygen concentration meter, an oxidation-reduction potentiometer, and a hydrogen ion concentration meter.
Pig house described.