JPH0144393B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for deodorizing and purifying sewage using stratified soil.

Various types of deodorizing devices using soil have already been developed by the present inventors, and their value as a resource-saving and energy-saving deodorizing method has been fully evaluated by society. However, since the soil deodorization described above deodorizes by forcing air between soil particles, it is possible to treat a large amount of malodorous gases in a small area compared to general physical and chemical deodorization treatments. It was difficult.

In recent years, the problem of bad odors has caused little damage in factories, residences, treatment plants, etc. that have large sites, and it is often the facilities that have small areas that generate bad odors that have led to social conflicts. It had been requested.

The present invention was made in response to the above-mentioned needs, and its purpose is to effectively utilize ground space by layering soil, improve deodorizing ability in narrow sites, and to It is an object of the present invention to provide a soil-based deodorizing and sewage purification method that can promote the sewage purification effect by culturing microorganisms and supplying them to a sewage treatment tank located below the stratified soil.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a cylindrical layered unit, and a ventilation pipe 2 is provided in the center thereof. A support plate 3 with a large number of small holes 3a is installed at the middle position and bottom of the stratification unit 1, and a support plate 3 with a large number of small holes 3a is installed therein.
Soil 5 is filled on top of it. A space 6 is formed between the support plate 3 at the intermediate position and the lower soil layer 5, and a space 6 is formed between the support plate 3 at the intermediate position and the soil layer 5 at the lower side.
The bad odor is supposed to enter through a. 1a is an exhaust hole.

FIG. 3 shows a large number of the stratified units 1 stacked along the wall of a house 7, with a sewage septic tank 8 installed below. Reference numeral 9 is a forced ventilation fan, which blows the bad odor from the septic tank 8 into the ventilation pipe 2 of the stratification unit 1. Reference numeral 10 denotes a watering device, which continuously supplies the soil 5 in the stratified unit 1 with moisture necessary for culturing microorganisms and deficient nutrients including trace elements.

Since this embodiment is configured as described above, if the forced ventilation fan 9 is operated while continuously supplying water and nutrients to the soil 5 from the watering device 10 as described above, the bad odor from the sewage septic tank 8 will be reduced as shown in Figure 2. The air is sent to the ventilation pipe 2 as shown in FIG.

The bad odor that has entered the ventilation pipe 2 is evenly distributed into the space 6 through the ventilation pipe 2a. A part of the bad odor in the space 6 enters the soil 5 from the surface of the lower soil layer 5, and the bad odor components are adsorbed and captured by soil particles, and after being subjected to deodorization treatment, they are absorbed into the small holes of the lower support plate 3. 3
It is discharged from a to the bottom of the unit 1.

On the other hand, the remainder of the foul odor in the space 6 enters the upper soil layer 5 through the small holes 3a of the support plate 3 in the intermediate portion, undergoes deodorization treatment in the same manner as described above, and is then discharged from the surface thereof.

Since an exhaust hole 1a is formed at the upper end of the stratified unit 1, when the units 1 are stacked as shown in FIG. It is always discharged into the atmosphere from the exhaust hole 1a.

In addition, since water and nutrients are continuously supplied into the soil 5 from above, microorganisms proliferate and are dripped into the sewage purification tank 8 together with flowing water, thereby contributing to sewage purification.

Although the layered unit 1 is formed in a cylindrical shape, the present invention is not limited to this, and may be in any shape such as a quadrangle or a polygon. Further, the forced draft fan 9 is not necessary if the tank 8 is a blow tank and is already equipped with a blower or the like, or if it has a completely sealed structure such as a septic tank. The thickness of the soil layer 5 is, for example, about 20 cm, and its particle structure is preferably a mixture of volcanic ash and perlite that can maintain some degree of air permeability even when a large amount of water drops pass through it. Furthermore, during the above water sprinkling,
Lime water may be mixed in as a measure against NOx, or hot water may be used to increase microbial activity.

As described above, the present invention stacks soil layers in a tower shape in the atmosphere, performs deodorizing treatment by aerating bad odors into the soil layers, and drains a microbial culture solution into the soil layers to remove sewage from below. Because it is dripped into a septic tank, it is not only possible to effectively deodorize a large amount of bad odors in a small area, but it can also be discharged into the upper atmosphere and diffused and diluted, eliminating pollution and making use of the soil at the same time. This has the advantage that the microorganisms can be cultured and supplied to the sewage purification tank below, thereby improving the purification ability.

Next, the scope of application of the present invention will be listed.

(b) Countermeasures against ground odors in snowy, cold regions (especially effective when the deodorizing effect can be enhanced by supplying hot water) (b) Deodorizing from factory wastewater treatment equipment in crowded areas.

(c) A simple treatment that uses the walls of a factory or house that have a bad odor (in this case, it is sufficient to connect a ventilation fan indoors).

(d) The problem can be easily solved by installing a cooling device using water washing for heated gas and dry gas containing tar.

(E) Purification and circulation of indoor air (also effective when used in conjunction with air cooling facilities and using groundwater, cold water from lake bottoms, baths, and heated wastewater from factories).

(f) For household purification agents and deodorizing toilets, it is highly practical to design a smaller single unit that can sufficiently accomplish the purpose without the need for water spraying.

[Brief explanation of drawings]

FIG. 1 is a half-sectional plan view of the stacked unit, FIG. 2 is a longitudinal sectional view taken along the line - in FIG. 1, and FIG. 3 is a conceptual diagram of the system in a tower-shaped stacked state. 1... Stratification unit, 2... Ventilation pipe, 3... Support plate, 5... Soil layer, 8... Sewage septic tank, 9...
Forced draft fan, 10...water sprinkler.

Claims (1)

[Claims] 1 Layering soil layers in a tower shape in the atmosphere, deodorizing the foul odors by aerating the soil layers, and flowing a microbial culture solution into the soil layers to drip into the sewage septic tank below. A soil-based deodorizing and sewage purification method.