JPH0712480B2 - Filler for septic tank - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a septic tank packing, and more particularly to a compound containing a phenol and / or a phenol-exposing group in the treatment of wastewater containing organic matter. The present invention relates to a septic tank packing using a microbial metabolite or a humus.

(Prior Art) In order to prevent river pollution, many septic tanks for treating wastewater such as household wastewater and livestock wastewater have been installed.

In such a conventional septic tank, a sewage treatment method based on an activated sludge method, which aims to decompose organic matter in wastewater to reduce its molecular weight and gasify it, is usually adopted.

Such a septic tank has a basic problem that it does not have a sufficient ability to remove organic substances and emits an odor.

In order to solve this problem, in JP-A-61-33297 and JP-A-61-260880, wastewater containing an organic substance and a microbial metabolite containing a phenol and / or a compound having a phenol-exposing group are described. There has been proposed a processing method of mixing the.

According to such a method, by reacting an organic substance (organic substance) in wastewater with a microbial metabolite in a physicochemical manner, binding, particle formation, aggregation, condensation, macromolecularization including polymerization, and macroscopic sludge By causing solidification and solid-liquid separation of the solidification, wastewater can be easily purified without generating odor.

The present inventor previously described in Japanese Patent Application No. 62-257788,
A compound having a phenol and / or a phenol-exposing group at a site in contact with wastewater in a septic tank as a small-sized or medium-sized septic tank which can efficiently perform the treatment method and can be applied to a general apartment house or a small-scale sewer. It was proposed that the packed bed packed with microbial metabolites or humic substances containing was previously fixed.

(Problems to be Solved by the Invention) According to the septic tank previously proposed by the present inventor, aerobic bacteria and facultative anaerobic bacteria among general soil bacterial groups in wastewater and sludge are phenol and / or Contact with a microbial metabolite containing a compound having a phenol-exposed group or a humus-containing material (hereinafter sometimes referred to as "phenolic material"), and the metabolite has phenol and / or a phenol-exposed group. Since it is acclimated to contain the compound, it facilitates extraction of microbial metabolites containing phenol and / or compounds with phenol-exposed groups.

As a result, the wastewater treatment function is maintained and promoted,
Wastewater treatment can be performed efficiently.

However, according to the method of fixing the filling layer filled with the filling material such as phenol in advance in the portion of the septic tank which comes into contact with the wastewater,
The packed bed may be clogged with sludge in a relatively short time.

By the way, when such a packed bed is clogged, contact between the aerobic bacteria and facultative anaerobic bacteria and the packing material such as phenol is not effectively performed, and there is a possibility that acclimatization of the bacteria may not be facilitated. It is necessary to carry out the cleaning cycle in a relatively short period.

Therefore, an object of the present invention is to prevent clogging of a packed bed filled with a packing such as phenol in a relatively short time, and to prolong the contact between aerobic bacteria and facultative anaerobic bacteria with the packing. An object of the present invention is to provide a septic tank filling that can be effectively retained for a period of time.

(Means for Solving the Problems) The above-mentioned object is a plurality of packing bodies provided without being fixed to a site in contact with wastewater in a septic tank, and the packing bodies are andesite, rhyolite, etc. From a packing body filled with crushed stones containing activated silicic acid, and a packing body containing microbial metabolites or humic substances containing phenol and / or a compound having a phenol-exposed group. This is achieved by a septic tank filling body characterized in that the filling body is provided with a buoyancy adjuster.

In particular, as a packing body, a packing body filled with crushed stones containing activated silicic acid content such as andesite and rhyolite, and a microorganism containing a phenol and / or a compound having a phenol exposed group When the packing material filled with the metabolites or humus is provided, the sludge settling property in the septic tank becomes extremely good, and solid-liquid separation can be easily performed.

In addition, a plurality of packing bodies float, migrate, and
Alternatively, if the fillers that settle out are mixed, the fillers easily move in accordance with the movement of the wastewater, so that the plugging of the fillers can be further prevented.

Incidentally, the "compound having a phenol-exposed group" in the present invention refers to a general organic substance having a phenol-exposed group,
Particularly, an enzyme having a phenol exposed group is effective.

The term "activated silicic acid content" means an unstable substance having a high andesitic or rhyolitic composition and having high activity such as volcanic glass.

(Operation) According to the present invention, organic matter in wastewater is converted into macromolecules and precipitates as sludge in the septic tank by contact with microbial metabolites containing phenol and / or a compound having a phenol-exposed group.

Such sludge has a relatively good settling property and does not stick even if it covers the surface of the filling body.

Moreover, since the packing body is provided without being fixed in the septic tank and two kinds of packing bodies are provided, and the packing body is provided with the buoyancy adjusting section, the packing body can be adjusted according to the movement of the wastewater. It is easy to change the position, it is possible to prevent the filling body from blocking,
Furthermore, due to the action of activated silicic acid components such as andesite and rhyolite, the sludge settling property in the septic tank becomes extremely good, and solid-liquid separation can be easily performed.

(Example) This invention is demonstrated using drawing.

FIG. 1 is a cross-sectional view of a septic tank using the filling body of the present invention, in which wastewater is discharged from the wastewater inflow pipe 6 to the first reaction tank 2 of the septic tank.
And the clear water is discharged from the discharge pipe 17 through the second reaction tank 3, the precipitation tank 4, and the discharge tank 5.

In addition, reference numeral 14 in FIG. 1 denotes a liquid feeding pipe for feeding the waste water from the first reaction tank 2 to the second reaction tank 3.

In such a septic tank, the sludge settled in the settling tank 4 is returned to the sludge culture tank 1 by a sludge return pipe 13 together with some water. The sludge return pipe 13 has, for example, an air lift structure operated by an air pump (not shown).

The sludge culture tank 1 and the first to second reaction tanks 2 and 3 have a plurality of packings filled with a packing such as phenol, andesite, rhyolite, etc. A plurality of packed bodies filled with activated crushed stones containing silicic acid content (hereinafter sometimes referred to as activated silicic acid content-containing crushed stones) are provided without being fixed.

The plurality of packing bodies have a substantially spherical outer shape, and in the sludge culture tank 1 and the first reaction tank 2, in order to make good contact between the packing bodies and wastewater and prevent the packing bodies from flowing out, It is inserted in the waste water, which is surrounded by the perforated plates 8 and 8 ′ such as punching plates and the inner wall of the tank.

In the second reaction tank 3, a perforated plate 8 is provided so as to obliquely close the connecting portion from the inner wall of the tank in order to prevent the filler from flowing out from the connecting portion with the settling tank 4 in the lower portion of the tank. ing.

Among such packings, sludge culture tank 1 and first reaction tank 2
The packing 10 in the above is mainly floating near the upper porous plate 8 and the packing 12 is mainly settled near the lower porous plate 8 '.

Further, the filling body 11 moves up and down between the perforated plate 8 and the perforated plate 8'and wanders according to the movement of the waste water.

As shown in FIG. 2, such a packing is made of a porous synthetic resin, a net or the like, and a packing such as phenol or crushed stone containing active silicic acid content is packed inside the packing, and a buoyancy adjusting section is also provided. It has been done.

(1) of FIG. 2 is a floating type shown as the filling body 10 in FIG. 1, and an air bag 20 for imparting buoyancy to the filling body is provided, and (2) of FIG. In the figure, it is of a sedimentation type shown as a filling body 12, and is provided with a sand bag 21 for imparting a sedimentation force to the filling body.

In addition, (3) in FIG. 2 is a migratory type shown as the filling body 11 in FIG. 1, and the buoyancy is adjusted by the air bag 20 and the sand bag 21 to circulate while moving up and down in the waste water. Is.

The proportion of such packing bodies 10, 11, 12 can be appropriately changed according to the nature of the wastewater, and like the second reaction tank 3, only the packing body 11 of the migratory type can be used. In the sludge culture tank 1 and the first reaction tank 2, the floating type packing body 10 and the sedimentation type packing body 12 are made substantially equal to each other, and the migratory type packing body 11 is provided more than each of the packing bodies. It is preferable to reduce the amount.

Further, the ratio of the filling body filled with a filler such as phenol (filling body A) and the filling body filled with activated silicic acid-containing crushed stone (filling body B) can be arbitrarily changed. It is preferable that the amount of A is larger than that of the filling body B, and particularly, the ratio of the filling body A and the filling body B is preferably about 3: 1.

In this embodiment, an aeration device 9 is provided at the bottom of each tank, and the settling tank 4 is filled with crushed stone containing activated silicic acid such as andesite, rhyolite, etc. Are provided for complete separation from sludge.

The waste water flowing into the septic tank first passes through a net or the like provided in a separate place to be removed as impurities, and then flows into the first reaction tank 2. Organic substances contained in the wastewater in the first reaction tank 2 are microbial metabolites containing phenol and / or a compound having a phenol-exposing group in the wastewater (hereinafter, may be referred to as microbial metabolites such as phenol) and activity. Aggregates due to the action of the converted silicic acid.

The organic matter that has been aggregated and sludged in this way flows into the second reaction tank 3, and again contacts the microbial metabolites such as phenol and the activated silicic acid content to form macromolecules, and precipitates in the precipitation tank 4.

Such microbial metabolites such as phenol are mainly supplied by metabolism of aerobic bacteria and facultative anaerobic bacteria in wastewater.

In this way, in order to adapt the above-mentioned bacterial group so that the metabolite contains a compound having phenol and / or a phenol-exposing group, a packing body filled with a packing such as phenol is provided to The atmosphere in the wastewater is adjusted by eluting the microbial metabolites.

In this respect, each of the filling bodies in the present embodiment does not move along with the wastewater flowing by the air flow discharged from the aeration device 9 provided in each tank and is not likely to be blocked by sludge or the like, and the contact area with the wastewater. Since microbial metabolites such as phenol are sufficiently eluted, aerobic bacteria and facultative anaerobic bacteria are sufficiently adapted to include phenol and / or a compound having a phenol-exposed group in their metabolites. can do.

Further, in this embodiment, the sludge settled in the settling tank 4 is returned to the sludge culture tank 1 through the sludge return pipe 13 together with some water, and after being cultured, the sludge inflow hole 7 of the wastewater inflow pipe 6 Is mixed in the waste water and returned to the first reaction tank 2.

Also in such a sludge culture tank 1, a packing body filled with a filling material such as phenol and a packing body filled with crushed stone containing activated silicic acid are provided in the tank, and aerobic property in water and sludge is provided. It fully adapts bacteria and facultative anaerobic bacteria as described above, and makes sludge itself into macromolecules.

In this way, since the bacteria group and the macromolecular sludge that have been sufficiently acclimatized are mixed in the wastewater flowing into the septic tank from the sludge inflow hole 7 of the wastewater pipe 6, aerobic bacteria and facultative anaerobes in the wastewater. Acclimation of sex bacteria can also be performed.

The packing body provided in this sludge culture tank 1 also includes the floating type packing body 10, the migratory type packing body 11, and the sedimentation type packing body 12 from the aeration device 9 provided at the bottom of the tank. It prevents the filling material filled in the filling body from being clogged with the sludge or the like by moving together with the flowing water and the sludge or the like by the discharged air flow.

The amount of air ejected from the aeration device 9 of the sludge culture tank 1 is sufficient to agitate the water and sludge in the tank, and a valve 16 provided in the middle of the air pipe to the aeration device 9 is used. The amount of air can be adjusted.

On the other hand, the first reaction tank 2, the second reaction tank 3, and the like of such a septic tank,
The clear water that has passed through the settling tank 4 is discharged from the discharge tank 5. At this time, a disinfectant or the like may be added.

Since the packed bed 15 filled with crushed stone containing active silicic acid in the settling tank 4 is provided to completely separate sludge, if sludge is sufficiently separated, There is no particular need to provide it.

Further, the septic tank in the present embodiment is made of FRP and can be mass-produced, but it may be made of concrete and may be a prefab which is easy to assemble.

Further, the shape of the filling body is not limited to the spherical shape, and may be any shape such as an elliptic sphere or a cube.

(Effect of the invention) The septic tank filler of the present invention is unlikely to be blocked by sludge or the like and can maintain good contact with wastewater for a long time, so that the septic tank cleaning cycle can be lengthened and maintenance of the septic tank can be simplified. can do.

Further, the septic tank packing of the present invention, the packing is packed with crushed stone containing activated silicic acid content such as andesite, rhyolite, and phenol and / or Since it is composed of a microbial metabolite containing a compound having a phenol-exposed group or a packed body filled with humus, the sludge settling property in the septic tank becomes extremely good,
Solid-liquid separation can be performed easily.

[Brief description of drawings]

FIG. 1 is a sectional view of a septic tank using the septic tank filler of the present invention, and FIG. 2 is a front view of the septic tank filler of the present invention. In the figure, 1 ... Sludge culture tank, 2 ... First reaction tank, 3 ... Second reaction tank, 4 ... Sedimentation tank, 10 ... Floating type packing, 11 ...
Migration type packing body, 12 ... Sedimentation type packing body, 20 ...
… Buoyancy adjustment part (airbag), 21 …… buoyancy adjustment part (sandbag).

Claims (2)

[Claims] 1. A plurality of packings provided without being fixed at a part in contact with wastewater in a septic tank, wherein the packings have activated silicic acid content of andesite, rhyolite, etc. A packing body filled with crushed stones containing slag, and a packing body filled with a microbial metabolite or a humic substance containing phenol and / or a compound having a phenol-exposed group. A septic tank packing, which is provided with an adjusting section. 2. A plurality of packings, in which the packings that float, migrate, or settle in waste water are mixed.
The septic tank filling described.