JP3454391B2 - Granule blocks for water treatment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular block for water treatment such as a water channel or a reservoir.

[0002]

2. Description of the Related Art In natural ponds, reservoirs, etc., to purify the water quality, a filtering device is provided which circulates the target water with an underwater agitator and filters it with a filtration tower, or is sterilized by chemicals. There is.

[0003]

However, since the filtration device becomes large-scale and the construction cost is high, it is difficult to realize. Further, there is a problem in terms of cost in the sterilization treatment with chemicals, and the effect is small particularly in large places such as natural ponds and reservoirs.

In addition to the above, rainwater and domestic wastewater should be managed separately as much as possible, and the water used for drinking water and agricultural water should be mainly rainwater so as to achieve purification of water quality. There is also a method, but I can not manage it sufficiently,
Further response is urgently needed. That is, in natural ponds, reservoirs, etc. where domestic wastewater has entered, water pollution of BOD components mainly composed of SS components, phosphorus compounds, and nitrogen compounds, which are suspended in water, has progressed, and no countermeasures have been taken to remove them.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional examples, to exert a function as a filtering material in a natural pond, a reservoir, a waterway, etc. Another object of the present invention is to provide a granular block for water treatment, which can be healthyly inhabited, can also remove BOD components, and can be effectively and stably supplied as a secondary product block whose quality is controlled as a product.

[0006]

To achieve the above object, the present invention comprises a core microbial habitat layer made of charcoal and compost, and an intermediate water retention layer made of pearlite and wood flour. Part of the microbial active layer is zeolite,
The gist is that a three-layered granular body composed of Kanuma soil and charcoal was block-formed with an adhesive.

[0007]

According to the present invention, each granule comprises a core microbial habitat layer, an intermediate water retention layer, and a surface microbial active layer. The microbial habitat layer contains microorganisms that remove BOD components in water. The water retention layer always retains water necessary for microorganisms, and the microbial active layer has a rough surface so that BOD treatment by microorganisms and adsorption of dirt in water can be effectively performed. .

[0008] Hundreds or thousands of individual granules are grouped together and blocked with a water-resistant adhesive to have high water permeability, water retention and filterability, and a residence where microbes inhabit. And a granular structure in which the microorganisms and the air (oxygen) and the BOD component serving as a feed for the microorganisms are entangled with each other under favorable conditions.

Granule blocks are placed in waterways and reservoirs,
By installing multiple units collectively, it is possible to reliably catch SS (water suspended matter) floating on the surface of the water, and it becomes easier for microorganisms to take in air (oxygen), and the microbial population becomes active and BOD components are removed. Purification of advancing water is effectively performed.

Also, so-called activated sludge in which SS components and BOD components are decomposed by microorganisms is deposited on the surface and inside of the granule block after long-term use, but these are removed by wind and rain. , It is carried into the fields through the waterways and is effectively used as organic fertilizer.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. The individual structures of the granules 1 are as shown in FIG.
A granule produced by a granulator, the size of which is a substantially spherical body having a diameter of 45 to 60 mm, the core of which is a microbial habitat layer 2 having a layer thickness of 6 to 9 mm made of charcoal and compost, The middle part around is a water retaining layer 3 consisting of pearlite and wood flour and having a layer thickness of 6 to 8 mm, and the outer surface layer is a layer thickness consisting of zeolite, Kanuma soil and charcoal.
It is composed of a microbial active layer 4 of 14 to 14 mm.

As shown in FIG. 2, the granule block 5 is made up of hundreds to thousands of granules 1 and a molding machine using water-resistant starch and casein, synthetic resin, synthetic rubber emulsion and other adhesives. The size of the block can be set arbitrarily, but it is usually 500 to 1000 mm in length and 1000 to 1500 in width.
It is formed into a rectangular parallelepiped having a height of 300 mm and a height of 300 to 600 mm.

Although various methods of installing the granule block 5 are conceivable, as an example, as shown in FIG. 3, the granule block 5 is installed like a bank in the middle of the water channel 6.

Upstream of this waterway 6 for removing dust,
A comb-shaped screen 8 is installed, and immediately after that, a plurality of granule blocks 5 are put together in a serpentine basket 7 or a futon basket so that the upper surface of the granule blocks 5 is exposed to the air with respect to the water level 9 in the water channel. The bottom of the waterway should be attached to the bottom of the waterway.

As for water, first, coarse dust in the water is removed upstream by a comb screen 8, and then the water passes through a plurality of layers of the granular block 5 to form fine SS particles.
The particles adhere to and are removed from the microbial active layer 4 of the individual granules 1 of the granule block 5. Further, the BOD component in the water is removed by the microorganisms gradually propagated in the microbial active layer 4 of the granule block 5 in about two weeks after being installed in the water channel, and the water is purified as a suitable water.

As another installation example, FIG. 4 is an installation example in which the granule block 5 is installed on the concrete method frame 13 on the slope of the reservoir 11. Into the concrete method frame 13, a plurality of granule blocks 5 were fitted together.

When water flows into the reservoir, fine SS components adhere to the microbial active layer 4 of each granule 1 of the granule block 5 by passing through a plurality of layers of the granule block 5 while staying in the reservoir. Then removed. Further, as in the example of installation in the water channel 6 in FIG. 3, B is gradually increased by the microorganisms that propagate in the microbial active layer 4 of the granule block 5 in about 2 weeks.
The OD component is removed and purified as water for use.

[0018]

As described above, the granular block for water treatment of the present invention can be used as a filtering material for removing SS from water used in waterways and reservoirs, and can also treat BOD components. As a purification agent for water, it can be effectively and stably supplied as a quality-controlled secondary product block.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a granule used in a granule block for water treatment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the granular block for water treatment of the present invention.

FIG. 3 is a perspective view showing an installation example of a granular block for water treatment of the present invention.

FIG. 4 is a vertical sectional side view showing another installation example of the granular block for water treatment of the present invention.

[Explanation of symbols]

1 ... Granules 2 ... Microbial habitat 3 ... Water retention layer 4 ... Microbial active layer 5 ... Granule block 6 ... Channel 7 ... Snake basket 8 ... Comb screen 9 ... Water level in the canal 11 ... Reservoir 13 ... Legal framework

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-192693 (JP, A) JP-A-6-182374 (JP, A) JP-A-3-262598 (JP, A) JP-A-3- 8493 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 3/10 ZAB

Claims (4)

(57) [Claims] 1. A granule block for water treatment, wherein a granule comprising three layers of a microbial habitat layer, a water retention layer and a microbial active layer is block-molded through an adhesive agent. 2. The granule block according to claim 1, wherein the microbial habitat layer of the granule comprises charcoal and compost. 3. The granule block according to claim 1, wherein the water retention layer of the granule is made of perlite and wood flour. 4. The granule block according to claim 1, wherein the microbial active layer of the granule comprises zeolite, Kanuma soil and charcoal.