JPH11277070A - Sewage treatment method using humus dissolved water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewage treatment method capable of purifying sewage up to a colorless transparent state by sedimenting and separating fine org. matter mixed with sewage by humic action only by mixing sewage with humus dissolved water in an amt. smaller than that of the humus dissolved water. SOLUTION: In a sewage treatment method wherein humus dissolved water obtained by bringing water into contact with humus is mixed with sewage mixed with fine org. matter or the like to sediment and separate fine org. matter or the like in sewage, the mixing ratio of the humus dissolved water and sewage is determined so that sewage is smaller than the humus dissolved water to certainly sediment and separate the fine org. matter or the like by humus. The mixing ratio of the humus dissolved water and sewage is pref. set so that sewage is 40% or less with respect to 60% or more of the humus dissolved water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating sewage with humus. More specifically, the present invention relates to a sewage treatment method capable of sedimenting and separating minute organic matter and the like from sewage by simply mixing humus and sewage to purify the sewage to a transparent state.

[0002]

2. Description of the Related Art It is known that humus exhibits an excellent effect in removing malodors emitted from animal manure and the like.
Nos. 6,650, 65697, 65698, and the like. Since humus is a natural product, it has an excellent feature of preventing secondary pollution of rivers and the like by treated water.

[0003] However, the humus is used to treat sewage containing micro-organic substances and the like, and the sewage that is turbid or colored by the contaminants is made clear by sedimentation and separation of the contaminants. A technology that can purify the state has not yet been proposed. Therefore, the present inventor considers whether it is possible to separate micro-organic substances and the like mixed in the sewage using humus, which is a natural product and does not cause secondary pollution of a river or the like by treated water, A humus solution is prepared by immersing a humus at a weight ratio of 5 to 10% in water, and the humus solution is poured into five test containers at 95 cc, 90 cc, and 8 cc.
0cc, 70cc, and 60cc are added in different amounts, and the treated wastewater of cow manure exhibiting yellow-green color is put into each test container in 5cc for 95cc of humus dissolved water and 10cc for 90cc.
After adding 20 cc to 80 cc, 30 cc to 70 cc, and 40 cc to 60 cc, the mixture was stirred well, then allowed to stand still and observed for changes. As a result, in the test vessel with 5 cc of sewage, sedimentation and separation of minute organic matter and the like started from about 50 seconds, and after one hour, most of the minute organic matter and the like settled and separated at the bottom of the test vessel, and the water was a pale yellow colored transparent state. In a test vessel with 10 cc of sewage, sedimentation and separation of minute organic matter and the like start from about 2 minutes, and after 2 hours, most of the minute organic matter and the like settle and separate at the bottom of the test vessel, and the water is slightly more than that of 5 cc of sewage. In the test container of 20 cc of sewage, it became clear that the color of the top layer of sewage became lighter after several hours, but it was observed that the color of the top layer of sewage became lighter all day and night. The color of the sewage below the upper layer seems to have become slightly lighter. In the test container of 30 cc of sewage and the test container of 40 cc, almost no change in the color of the entire sewage was observed even after two days. Did not From this, we know that the smaller the mixing ratio of the treated sewage to the humus solution, the more effective the purification.
After adding 3 cc of treated sewage to 97 cc of humus solution, stirring well, and then allowing the mixture to stand, the change is observed. From about 30 seconds, sedimentation and separation of minute organic substances etc. start, and after 1 hour, most of the minute organic substances etc. The water settled and separated at the bottom of the test container, and the water became a colorless and transparent state. Thus, 50 liters of the treated water in the colored and transparent state between the 5 cc test container and the 10 cc test container of the sewage are used.
Take the cc, mix it with the same amount of humus solution, stir well, and let it stand still to observe the result. Most of the water settled and separated at the bottom of the test container, and the water became a colorless and transparent state. Therefore, it has been found that it is practical to mix 90% or more of corrosive dissolved water with 10% or less of cattle manure treated sewage. Also, 70 cc and 60 cc of the corrosion solution prepared in the same manner as above were put into two test containers, and the whitened rice sharpening juice was added to each test container to 30 cc and 60 cc for 70 cc of the humus solution. 4 for
After adding 0 cc and stirring well, the mixture was allowed to stand and observed for changes. As a result, in the case of 30 cc of rice sharpening juice, sedimentation and separation of fine organic substances and the like start about 30 minutes later, and after one hour, most of the fine organic substances and the like settle and separate at the bottom of the test container, and water is colorless and transparent. In the case of 40 cc, sedimentation and separation of minute organic matter etc. start from about 1 hour even in the case of 40 cc. After 3 hours, most of the minute organic matter etc. settle and separate at the bottom of the test container, and water is almost colorless and transparent. became. From the above experimental results, the mixing ratio with the humic solution differs depending on the type of treated sewage,
If you mix so that humus solution is more than sewage,
The present invention has been completed by finding that sewage that is turbid or colored by the incorporation of microorganic substances can precipitate and separate microorganic substances and the like by the action of humus to a colorless and transparent state. It is a thing.

[0004]

A problem to be solved by the present invention is that humus, which has been conventionally used only for the deodorization of sewage, is used as humus solution and a smaller amount of humus is added to the humus solution. Only by mixing water, sedimentation and separation of micro-organic substances and the like mixed into the wastewater by the action of humus can purify the wastewater to a colorless and transparent state, and can cause secondary pollution of rivers etc. by the treated water. Provide no wastewater treatment method.

[0005]

Means for Solving the Problems In order to solve the above problems, a method for treating sewage with humic solution according to the present invention is characterized by employing the following means. (1) A sewage treatment method in which humus solution obtained by bringing water into contact with humus and sewage mixed with minute organic matter are mixed to settle and separate minute organic matter and the like in the sewage. The mixing ratio between the humus and the sewage is determined so that the amount of the sewage is smaller than that of the humus solution, so that sedimentation and separation of minute organic matter and the like by the humus can be surely performed. (2) The mixing ratio of humus and sewage is set to 40% or less for humus for 60% or more. (3) Stirring, aeration and the like are added to the mixture of the humus solution and the sewage to enhance the contact effect between the humus and the minute organic matter.

Further details of this treatment method are as follows: wastewater to be treated is treated water of manure of various animals, water for cultivation and breeding of fish and shellfish, washing water for animal and plant food and drink, cooking water, Microorganic substances such as water for cleaning food and drink containers and cooking equipment are mixed, and water is turbid or colored by these contaminants. Among them, the treated water of animal manure varies in a variety of ways depending on the composition and state of herbivorous, carnivorous, omnivorous and animal foods, and the associated methods of collection and treatment. For example, in the case of cattle excreted water, it is a liquid component that has been forcibly dehydrated after being collected by a bank cleaner, or a liquid component that has been extracted from a liquid collected in a manure tank, or in the case of a pig, There are various differences depending on, for example, whether it is a high-concentration product that has been subjected to a treatment for removing solids from manure water, or a low-concentration product that has been prepared by treating a small amount of manure mixed into swine wash water. And the manure treated water of the pig,
Regardless of the method of recovery, fibers, undigested matter, hair loss, etc. are mixed, so these foreign substances are removed in the primary treatment. As in the case of swine manure treated water, foreign substances are removed by primary treatment, collected by Bancrina and then dewatered forcibly. Stirring removes air bubbles to make sewage water to be treated according to the present invention in which only fine organic substances and the like are mixed. In addition, water for cultivation and breeding of fish and shellfish, breeding water, etc. are mixed with foreign substances different from livestock etc., so they are removed by a method suitable for these foreign substances and treated wastewater, and further, cereals and dairy products, Other water, such as cooking water and washing water, which does not contain foreign matter, is treated as it is.

[0007] Humus for obtaining humus-dissolved water uses commercially available powders or pellets. In the case of powder, if it is put into water as it is, the fine powder is dispersed in water. When sedimentation and separation of minute organic matter and the like are performed by mixing water and sewage, the separation operation is hindered. Therefore, humus solution must be filtered to remove fine powder and used as transparent humus solution. For this reason, it is desirable to put the humus powder in a bag with fine eyes that does not allow the fine powder in the humus powder to pass through, and to prevent the fine powder from flowing out into the water. If the humus is in the form of pellets, put it in a net bag, wash it with water, wash away the dust, and then put it in water so that the dust does not adversely affect the humus. Allow water to be prepared. In addition, when powder humus is used, it looks as if the corrosion water was formed immediately. However, in this state, the effect of sedimentation and separation is poor.
It is necessary to take 2 hours of soaking time, and in the case of pellets, it is necessary to take 3 to 6 hours of soaking time. And
The humus immersion time described above, even when the treated water purified by the sewage treatment method of the present invention is used as the water for preparing the humus solution, by selecting the humus amount and time substantially the same as described above, The humus-dissolved water prepared from the recycled water can also maintain a stable separation effect.

The water for obtaining the humus solution can be tap water, well water, industrial water, or the like, or river water, lake water, or the like if there is no concern about secondary pollution. However, since the treated water which has been treated by the treatment method of the present invention to precipitate and separate out minute organic substances and the like is colorless and transparent, it can be used as water for preparing humus solution as described above. Therefore, in the case of wastewater with a large amount of treated water, if the treated water is reused for the preparation of humus solution, it is not necessary to supply water except when preparing the humus solution first. Significant savings.

In order to prepare the humus solution by bringing the humus into contact with water, as described above, the humus powder or pellets are put in a bag or a net and immersed in water to elute the humus into the water. . Therefore, at this time, the amount of humus to be used is adjusted according to the difficulty of sewage treatment. However, animal manure wastewater and seafood cultivation, breeding water and processing cooking washing water,
In the case of washing water for food or washing water for food containers, the standard value is 2 to 5% by weight based on water. The humus is eluted into the water in 3 to 6 hours by adding agitation or aeration to the water to prepare a humus solution having a desired humus concentration. When it comes, humus is replaced with new one so that the concentration of humus does not change so that a stable processing result is always obtained. In addition, the amount of humus with respect to water can be varied from 5% to 10% or more in this case because there are various types of sewage and a large change in the difficulty of separation. However, it goes without saying that the time for preparing the humus solution is arbitrarily increased or decreased according to the situation.

In order to mix the humus solution prepared as described above with sewage, usually a humus solution of 60 to 97% is placed in a treatment vessel depending on the difficulty of sewage treatment, and the humus solution is placed in the treatment vessel. 40% to 3% of sewage in which minute organic matter is mixed in
Add. However, storing wastewater in a treatment container
Humus solution can be added to this. The humus is mixed with the sewage to cause humus to act on the fine organic matter in the sewage. The effect of sedimentation and separation of minute organic matter and the like by humus is also likely to be poor. Therefore, the mixture of humus and sewage is agitated by stirring means or aerated by blowing air into the mixture, or both are added according to the type of sewage and the environment, etc. It enhances the contact effect and promotes sedimentation and separation of minute organic matter.In the case of aeration, if odorous air is used to blow into the mixture, humus acts to remove odor from the air during aeration. Aeration and air deodorization can improve the effect of two birds per stone.

When the humus and sewage are mixed in consideration of the above, fine organic substances and the like causing turbidity and banding in the sewage settle and separate to the bottom, and the upper part of the sedimentary layer is The treatment is terminated when the transparent state is reached, and the minute organic substances and the like settled on the bottom of the vessel are polycondensed with time and condensed into particles. Therefore, this condensate can be easily filtered after being pulled out, and the subsequent water treatment can be easily performed.
COD, BOD, nitrogen,
Phosphorus and the like are also effectively separated. If the mixing ratio with the humic solution is adjusted according to the type of sewage, the time required for the treatment should be less than 1 minute if the minute organic matter mixed in is extremely easy to settle, and about several hours if the minute organic matter hardly settles. Is possible. It is not necessary to mix the humus and sewage in the above-mentioned ratio at once, but prepare several mixing vessels and place the mixture of humus and sewage in these containers sequentially. Alternatively, the humus to sewage ratio can be reduced in the first container and replenished in a subsequent container to increase the humus ratio to reach the desired maximum ratio in the last container. Further, the mixing ratio may be set to a desired value from the beginning, and the humus solution may be gradually added to the rear container so as to compensate for a decrease in the function of sedimentation and separation.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of a method for treating sewage with humic solution according to the present invention will be described below.

Example 1 5% by weight of water in a container containing 1000 cc of tap water
The humus is charged and stirred, and the stirring is stopped in a state where the powder that has absorbed water is separated in the water between the heavy and light ones.In this state, the fine powder of the humus is suspended in the water, Fine powder was removed by filtration to obtain a transparent humus solution. The humus-dissolved water, the sewage after the primary treatment of the pig manure (1), and the sewage of the pig manure solid-liquid separated by the primary treatment and then subjected to the secondary treatment to form the effluent (2)
Then, an experiment was conducted in which sewage (3) mixed with milk when the milk container was washed, and the above three types of sewage and humus-dissolved water were mixed and sedimentation and separation of minute organic substances mixed from the sewage were performed. The following Experimental Examples 1 to 3 show the conditions and results of this experiment for sewage (1) to (3).

Experimental Example 1 10 days after the pretreatment of sewage (1), two or three days have passed
c is poured into a mixing vessel containing 90 cc of humus-dissolved water and stirred and mixed. In order to effectively contact the mixture with the humus and the fine organic matter, aeration is continued to sufficiently effect corrosion on the fine organic matter. It was allowed to stand still and the change in the sewage was observed. As a result, sedimentation and separation of the minute organic matter started from about 15 minutes, and after about three hours, most of the minute organic matter and the like settled and separated at the bottom of the container.
The upper part of the sedimentary layer becomes transparent, the odor of the existing wastewater is removed, and COD and BO are contained in the supernatant water.
The presence of D, nitrogen, phosphorus and the like was hardly recognized. In addition,
As a result of treating the wastewater (1) immediately after the pretreatment in the same manner as described above, the treatment capacity is inferior to that after a few days after the pretreatment. Good thing was confirmed.

Experimental Example 2 10 cc of the sewage water (2) immediately after the pretreatment was added to the humus solution 9
Pour the mixture into a mixing vessel containing 0 cc and stir and mix. Continue to aerate the mixture to effectively contact the humus with the small organic matter, allow the fine organic matter to sufficiently act on the corrosion, and then stop and change the wastewater. Was observed. As a result, the sedimentation and separation of the minute organic matter starts around 45 minutes, and after six hours, most of the minute organic matter settles and separates to the bottom of the container, and the upper part of the sedimentary layer becomes transparent, and the odor of the wastewater is also reduced. The presence of COD, BOD, nitrogen, phosphorus and the like in the supernatant water was hardly recognized. However, even if this sewage (2) is subjected to a few days after the pretreatment and tested under the same conditions, the result is the same, and it is not necessary to put a sleeping period for the sewage (2). confirmed.

Experimental Example 3 10 cc of sewage (3) was poured into a mixing vessel containing 90 cc of humus solution, mixed well with stirring, and then allowed to stand still to observe changes in sewage. As a result, sedimentation and separation of the minute organic matter started about 3 minutes later, and almost one minute later, almost all the minute organic matter and the like settled and separated to the bottom of the container, and the upper part of the sedimentary layer was pale white. Therefore, the amount of wastewater (3) was reduced to 7 cc, and the mixture was poured into a mixing vessel containing 93 cc of humus solution, mixed well with stirring, and allowed to stand still to observe the change. Separation started, and after 45 minutes, most of the minute organic substances and the like settled and separated at the bottom of the container, and the upper part of the settled layer became transparent. Further, the amount of waste water (3) was reduced to 5 cc, and this was poured into a mixing vessel containing 95 cc of humic solution, mixed well with stirring, and allowed to stand still to observe a change. As a result, the sedimentation and separation of the minute organic matter started from about 2 minutes, and most of the minute organic matter and the like settled and separated to the bottom of the container 45 minutes later. It was in the same light white state as in the case, and it was found that the best result was obtained when the mixing ratio of the sewage (3) and the humus solution was 7:93.

Experimental Example 4 In Experimental Example 3, when a container or the like to which milk adhered was washed with water and sewage contaminated with milk came out, the sewage was treated with humus solution. However, in this experimental example, the container to which milk adhered or remained was not washed, and humus-dissolved water was added so that the ratio with milk adhered or remaining to milk was 7:93. Then, the mixture was well mixed with stirring and allowed to stand. As a result, the organic matter and the like in the milk settled and separated due to the action of the humus, so that the water became transparent within one hour. Therefore, if the humus solution in the container is drained and rinsed, the container becomes clean, and the contamination of the container with milk can be done with just a little water without putting any effort into the container. Turned out to be clean.

[0019]

According to the first aspect of the present invention, (1) the humus solution obtained by contacting the humus with water is mixed with a smaller amount of sewage to separate and sediment minute organic substances mixed in the sewage. The sewage that has become cloudy or colored by fine organic substances can be purified into a transparent state, and COD, BOD, nitrogen, phosphorus, etc. are also removed along with the fine organic substances, thereby preventing pollution of water pollution by these substances. If the sewage is odorous, its odor can be measured. (2) Since only humus, which is a natural product, is used, it is an extremely safe method that does not cause secondary pollution of rivers and the like by treated water. (3) The equipment for preparing humus solution and the vessel for mixing humus and sewage can be treated with simple equipment by merely providing auxiliary equipment such as stirring and aeration, so that equipment costs and operating costs are low. Amazing low cost processing can be realized. Effect of Claim 2 More than 60% of humus and 40% of sewage
Since the following are mixed, if the mixing ratio within the above range is set in accordance with the difference in separation of the minute organic matter and the like that differs depending on the type of the wastewater, the minute organic matter and the like can be surely separated from any wastewater to separate the wastewater. It can be purified to a transparent state. Effect of Claim 3 Since the contact effect between the fine organic matter and the like and the humus is improved by stirring or aeration of the mixture of the humic solution and the sewage, sedimentation and separation of the fine organic matter and the like are quickly and reliably performed, and the processing capacity is increased. Can be measured.

Claims (3)

[Claims] 1. A humus solution obtained by bringing water into contact with a humus,
A sewage treatment method in which sewage mixed with sewage mixed with sewage is mixed with sewage mixed with sewage to mix and separate sewage from humus. Sewage treatment method using humus-dissolved water to ensure sedimentation and separation of micro-organic matter etc. by humus 2. The sewage treatment method according to claim 1, wherein the mixing ratio of the humus solution and the sewage is 40% or less with respect to 60% or more of the humus solution. 3. The method for treating sewage with humus-dissolved water according to claim 1, wherein the mixture of humus and sewage is agitated, aerated, or the like to increase the contact effect between the humus and the fine organic matter.