JPS6135826A - Removal of malodor by activated humic substance - Google Patents

Abstract

PURPOSE:To effectively remove malodor by a simple treating process and to enable the regeneration of an additive after use while making it possible to use an activated humic substance as a soil conditioner at last, by contacting a malodor with a liquid activated humic substance before contacting the same with a solid activated humic substance. CONSTITUTION:The malodor from an excretion treatment plant and a fish factory or the malodor 2 at the time of the preparation of org. fertilizer is sent to a first deodorizing tank 3 and contacted with an activated humic substance solution B1, which was prepared by adding allophane clay mineral to an aqueous extract of a powdery activated humic substance, to collect volatile basic components such as NH3 and amines in the malodor. Subsequently, the malodor is sent to a second deodorizing tank 6 and contacted with a first packing layer C prepared by mixing an iron powder, FeSO4 or Fe2(SO4)3 with a solid activated humic substance to adsorb are remove H2S and sulfur-containing volatile components are further passed through a second packing layer D, wherein activated carbon was mixed with an activated humic substance, as a safe measure. Next, the oxidation odor of the activated humic substance is removed by water or an alkali aqueous solution E to be exhausted to the open air.

Description

[Detailed Description of the Invention] [Objective of the Invention 1 J Field] The present invention effectively removes bad odors from human waste treatment plants, seafood processing plants, etc. using liquid active humus and solid active humus. It is about the method.

”W East In recent years, the number of complaints from local residents related to pollution has been mostly related to bad odors, and conventional methods of removing bad odors include, for example, 7
A product based on minic acid sorg (coal-based) has been developed.

However, even if the above-mentioned conventional methods can remove bad odors, they not only increase the initial cost and operating costs of the equipment, but also eliminate the generated oxidized odors by using diachlorine. Post-treatment with calcium acid, chlorine, ozone, etc. was required.

The present invention was made to eliminate the above-mentioned conventional drawbacks, and its purpose is to not only simplify the processing process but also to enable the regeneration of additives after use, and ultimately to An object of the present invention is to provide a method for removing bad odors using active humus that can be used as a soil improvement agent.

[Structure of the Invention J - 1st edition Kashiyenkai: t 6 r: dη 硼 [lack] The present invention is directed to odor from human waste processing plants or fisheries processing plants, and organic odors caused by fish bones and internal organs, soybean meal, starchy phase, etc. The odor from the production of natural fertilizer is brought into contact with liquid activated humus to capture volatile base components such as ammonia and amines, and then hydrogen sulfide and volatile components contained in solid activated humus are removed. The liquid active humus is made of natural humus formed from the remains of animals and plants and/or coal-based minerals (
Among the oxidized decomposition products of coal, lignite, lignite, grass coal, etc.), the pH of the aqueous extract is 4.0 or less and the oxidation potential is (+') 150. A 0.3 to 70% aqueous extract of artificial humus, which is the main mixture, with 0.3% or more of allo-7-based clay minerals added, or a humus rich in clay minerals (50% moisture) 3%
The above-mentioned solid active humus is added to the above-mentioned natural humus and/or artificial humus in an amount of 100 to 30%.
Mix 1% or more of iron powder or ferric sulfate powder or ferric sulfate powder at a weight ratio of 1% or more, form pellets, spheres, or extrusion molding, and mix or laminate with a support such as glass wool. It is formed into a honeycomb or bolus plate shape and has divalent iron oxide produced on its surface.

Furthermore, the present invention provides a second tank of liquid active humus between the liquid active humus and the solid active humus, and brings the bad odor into contact with the second liquid active humus. This second liquid active humus is made of 0.5% normal caustic soda containing about 30% of the above natural humus and/or artificial humus. Add 5% or more of each of ferrous or ferric sulfate and zeolite to the solution, and add air to the solution to form an active humus paper T monopolymer and hydroxide or fjS.
It is characterized by being a diiron mixed solution.

Preferred embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows an embodiment of deodorizing equipment for carrying out the method of the present invention, in which 1 is a blower that sucks bad odor from a human waste treatment device 2 and sends air to a first deodorizing tank 3. An active humus solution B1 is circulated and supplied to the first dehulling tank 3 by a pump 4.

The active humus solution B1 contains powdery active humus of 0.3 to
70% aqueous extract with 0.3% or more of allophane clay minerals (hereinafter simply referred to as clay minerals), or 3% of active humus rich in the above clay minerals (50% moisture).
This is what has been added above.

The bad odor blown into the active humus solution B1 of the first deodorizing tank 3 is not exposed to the shower 5, so that it comes into contact with the active humus solution B1 and is exposed to volatile substances such as ammonia and amines therein. Basic components are captured as complexes such as active humus, ammonium or amines.

The malodor leaving the first deodorizing WI3 is then sent to the second deodorizing tank 6 filled with solid active humus. The solid active humus is made of active humus and an admixture in the form of pellets with a diameter and length of 3 to 1016111, with a diameter of 3.=1.
0ml1f) Spherical or 3-10mm in diameter and 3-10mm in length
1 ocus, or mixed or laminated with a support such as glass wool to form a honeycomb or porous plate shape.As for its composition, Daiichi Hikari JRMc molds active humus. 100-3 before or after molding
It is produced by mixing 00 mesh iron powder or ferrous or ferric sulfate powder at a weight ratio of 10% or more, and sprinkling divalent iron oxide on the surface. In this case, 100 to 300 meshes of activated carbon with a weight ratio of 0.5% or more is mixed before or after molding the activated humus.

Therefore, when the bad odor entering the second deodorizing tank 6 first passes through the first packed bed C, hydrogen sulfide and sulfur-containing volatile components are adsorbed, and the odor is oxidized to sulfuric acid and removed.

Note that the second filling layer is provided as a safety measure.

The above-mentioned 1j treatment of the foul odor generated from the S2 filling debris is carried out using water circulated by the pump 7 or a 1% alkaline aqueous solution E.
This removes the oxidized odor of the active humus and exhausts it into the atmosphere.

FIG. 2 shows an embodiment of deodorizing equipment for implementing the second method of the present invention, and the difference from the equipment shown in FIG. 1 is that the first deodorizing tank 3 and the second deodorizing tank The point is that the third deodorizing WI8 is provided between @6. An active humus solution B2 is circulated and supplied to the third depth removal tank 8 by a pump 9. The active humus solution B2 contains the powdered active humus 3.
Sulfuric acid in 0.5% caustic soda solution using 0%! 51 or ferric iron and zeolite are added in an amount of 5% or more each, and air is forced into the mixture to obtain a mixture of active humic low molecular weight polymer and hydroxide l or fjS2 iron.

First deodorization 1/g! The foul odor emitted from the 3 is removed by air being blown into the active humus solution B2 in the third deodorizing tank 8, exposed to a 1° shower, and comes into contact with the active humus solution B2, where volatile lower fatty acids such as butyric acid and propionic acid are removed. is adsorbed and removed, and the next second deodorizing tank 6
sent to.

1 loss again - effect ~ Shuinu” Mei i) Example of odor removal at a human waste treatment plant a. Operating conditions Odor input flow rate: Suction blower - 100J! /min.

Discharge side 60.1! /1Ilin, active humus solution B,: 10% or more humus water extract 80
0Kj! was filled with a solution containing 5 kg or more of clay mineral.

First optical filling layer C: 360 kg of pellets made by adding 5% caustic soda to humic powder were filled with a mixture of 1% or more iron powder.

2nd light layer D: humus pellet) 1% per 380kg
The above activated carbon was mixed, adhered, and filled.

ii) Fisheries processing plant (fish meal and organic fertilizer manufacturing plant) a. Operating conditions Odor Input flow rate: Suction blower 3001/in.

Discharge 111100ffi/1lIin Active humus solution B: Filled with a solution in which 5 kg or more of clay mineral was added to 400 kl of a 10% or more humus aqueous extract.

Active humus solution B2: 5 kg or more each of ferrous sulfate and zeolite were dissolved and filled in 400 kl of 0.5% normal caustic sorg extract containing 10% or more humus.

First packed bed C: 60 kg of pellets prepared by adding 5% caustic soda to humic powder were filled with a mixture of 1% or more iron powder.

2nd packed layer D = humic pellets) 1% to 380 kg
The above activated carbons were mixed, adhered, and filled.

■ Effect of the invention 1 As described above, according to the present invention, allophane clay minerals weaken the oxidizing power of active humus and reduce oxidative odor due to radical oxidation of volatile sulfur-containing components. The generation of chlorine, ozone, potassium permanganate, etc. in the conventional deodorizing process can be made unnecessary.

Furthermore, according to the present invention, the processing steps are not only simple (
It is possible to regenerate the additive after use, and the final use as a soil conditioner has a lightening effect.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of malodor removal equipment for implementing the first method of the present invention, and FIG. 2 is a schematic explanatory diagram of equipment for implementing the second method. 1... Blower, 2... Human waste processing device, 3... First deodorizing tank, 4... Pump, 5... Shower, 6...
・Second deodorizing tank, 7... pump, 8... third deodorizing tank,
9...pump, 10...shower, B,,B,...
・Active humus solution, C...first packed layer, D...second
Filled bed, E...aqueous solution.

Claims (5)

[Claims] (1) Odors from human waste treatment plants or fisheries processing plants, as well as odors from the production of organic fertilizers from fish bones and internal organs, soybean meal, starch meal, etc., are brought into contact with liquid active humus to remove ammonia therein. and volatile base components such as amines, etc. are captured, and then hydrogen sulfide and volatile components contained therein are adsorbed by solid activated humus to remove the malodor. Removal method. (2) The above-mentioned liquid active humus has an oxidation potential of (+) when the pH of the aqueous extract of natural humus formed from the remains of animals and plants and/or oxidized decomposition products of coal-based minerals is 4.0 or less. 1
50 to 0.3 to 70 of artificial humus, a mixture mainly composed of oxidized humin, fulvic acid, humic acid, and clay minerals.
% water extract with 0.3% or more of allophane clay minerals added, or humus rich in clay minerals (water 50%).
2. The method for removing bad odors using active humus according to claim 1, characterized in that 3% or more of humus is added to the active humus. (3) The solid active humus has an oxidation potential of (+) when the pH of the aqueous extract of the natural humus formed from the remains of animals and plants and/or the oxidized decomposition product of coal-based minerals is 4.0 or less. 1
50 to 100 to 30 to artificial humus, a mixture mainly composed of oxidized humin, fulvic acid, humic acid, and clay minerals.
0 mesh iron powder or ferrous or ferric sulfate powder is mixed at a weight ratio of 10% or more and formed into pellets, spheres, or extrusion molding, and mixed or laminated with a support such as glass wool to form a honeycomb or porous shape. Form it into a plate shape and put 2 on the surface.
2. The method for removing malodor using active humus according to claim 1, wherein the activated humus is produced by producing iron oxide having a high valence. (4) Odors from human waste treatment plants or seafood processing plants, as well as odors from the production of organic fertilizers from fish bones and internal organs, soybean meal, starch meal, etc., are brought into contact with liquid active humus to remove ammonia therein. and volatile base components such as amines are captured, and then brought into contact with a second liquid activated humus to remove volatile lower fatty acids such as butyric acid and propion, and further hydrogen sulfide and other components are removed by the solid activated humus. A method for removing bad odors using active humus, which is characterized by adsorbing volatile components. (5) The second liquid active humus has an oxidation potential of ( +
) Approximately 30% artificial humus, a mixture mainly composed of oxidized humin, fulvic acid, humic acid, and clay minerals, from 150
To the 0.5% normal caustic soda solution used, 5% or more of each of ferrous or ferric sulfate and/or zeolite is added, and air is inserted to form a low molecular weight polymer of active humus and ferric or ferric hydroxide. The method for removing malodor using active humus according to claim 4, wherein the method is a ferric mixed solution.