JPS61209663A - Deodorant of basic malodor by humus and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to a deodorizing agent for basic malodors such as ammonia and amines, and a method for producing the same.

A - Conventional deodorizers for basic bad odors such as ammonia and amines are difficult to clean with water, sulfuric acid solutions that pose problems in post-treatment, and ascorbic acid, humic acid, and iron salt solutions. Those mainly oxidized by oxygen have drawbacks such as weak oxidizing power or short durability.

To compensate for this, there were many cases in which bad odors were collected from sources located in various places and treated centrally.

Problems to be Solved by the Invention However, in the above-mentioned intensive treatment, the scale of the treatment equipment is large and existing equipment cannot be used, and in addition, there are many problems in replacing the deodorizing agent and post-treatment.

The present invention was made in order to solve the above-mentioned conventional problems, and its purpose is to reduce maintenance costs, including deodorizing agent replacement and post-treatment efforts, by utilizing existing equipment. In order to solve the problem of low p water extract of active humus,
Utilizing the ability to oxidize basic odors into nitrogen gas under H In order to provide a deodorizing agent and a method for producing the same, the present invention provides a means for preventing basic malodors such as ammonia and amino acids.
A liquid mixture consisting of an aqueous extract of active humus, iron salts, an organic or inorganic acid or a mixture thereof, and a solution of acid-dissolved polymers such as lignin, and has the following characteristics in terms of each material and manufacturing method. be.

(B) Regarding constituent materials: The water extract of active humus is obtained by extracting active humus with hot water or by extracting it with water at 4°C or higher at low speed for at least 6 days, and contains mainly fulvic acid. shall be.

The iron salts are ferrous salts such as ferrous sulfate, and are added to the aqueous extract of active humus to enhance its oxidizing function.

The organic or inorganic acid is a non-volatile acid such as citric acid or lactic acid, or sulfuric acid, etc., and the mixed solution is a mixture of the above acids, which temporarily combines with the basic odor and is converted into nitrogen gas by the iron complex of fulvic acid. The purpose is to hold it until it is oxidized.

(b) Regarding the manufacturing method: Active humus in hot water of 85°C or higher for 30 minutes or more] --
Stir and heat extract, or use water at 4°C or higher for at least 60 hours.''1
Stirring is performed by rotating at low speed, and the process ends when pH and H become 4.0 or less. This extract contains 2% or more of fulvic acid.

” 1) Dissolve ferrous sulfate in the extract to reduce the iron content to 0.
Adjust to 5.

Next, an organic acid such as citric acid or citric acid and sulfuric acid is added to adjust the pH to 1 or less.

The aqueous extract of active humus is obtained by extracting active humus with hot water or with water at 4° C. or higher at low speed for 6 days or more, and mainly contains fulvic acid.

The present invention improves the oxidation ability and sustainability of the oxidation treatment using a humic acid solution and an iron salt among the conventional methods described above, and is also different in principle.

In addition, the method of the present invention includes fulvic acid containing 2% or more and its 25%
% of divalent iron ions at pH 1 or less to 3.
It acts on ammonium or amine salts (formed when organic or inorganic acids capture them from basic odors) in the region of 2 (most reactions take place in 2 or less), and the hydrogen peroxide generated at this time reacts with ammonia or amine salts. , or oxidizing amines to nitrogen gas.

The divalent iron ion complex of fulvic acid is active from pH 1 or below to pH 3.2, and since the amount of iron ions is small, it usually reacts with ammonia or amines to generate oxygen, but the above iron ions At the content of , the oxidation reaction reverses to the reduction reaction and hydrogen peroxide is generated.

Further, the iron complex of heptaminic acid is inactive at pH 2 or lower.

As described above, in the present invention, the combination of active humus, ferrous salt, organic acid, etc. is designed to generate hydrogen peroxide when it comes into contact with ammonia, etc.

In addition, in order to avoid generating excessive hydrogen peroxide, consideration was given to using a material such as lignin that is difficult to decompose and has a negative redox potential, and to maintain the potential from +200+nV on the negative side. In addition, the oxidation recovery power (converting ammonium citrate to citric acid) of the iron content-adjusted deodorizer is 3 times higher than that of the unadjusted deodorizer.
It's double.

Therefore, even if hydrogen sulfide, butyric acid, etc. accompany a basic odor, the former will oxidize to sulfur dioxide gas or sulfuric acid, and malodorous organic acids such as butyric acid will oxidize to carbon dioxide gas, so sulfur will precipitate as in the case of oxidation with oxygen. There is no possibility that ammonia or the like will bind to it and interfere with the above reaction, and butyric acid, which is difficult to oxidize, will not remain.

The above-mentioned active humus is a natural product containing 5% or more of fulvic acid, 3% or more of 7-minic acid, and 5% or more of each of clay minerals, lignin (matching the content of pellet deodorizer), etc. , artificial, or a mixture thereof, with a pH of 4.0 or less and an oxidation potential of +200 mV or more.

Example An embodiment of the present invention will be described below.

The active humus is extracted with hot water of 85° C. or higher while stirring at low speed for 30 minutes or more to make a 30% solution. In addition, when extracting with water at 4°C or higher, it is performed with low-speed stirring for 6 days or more. The final pH of the water extraction is 3°2. This operation yields a solution containing 2% or more of fulvic acid.

Ferrous sulfate is added to this extract to adjust the iron content to 0.5%.

Since the fulvic acid in the aqueous extract is usually about 0.3% iron complex, it is sufficient to add 0.8% ferrous sulfate 7 crystal water.

Add the same amount of citric acid to the adjustment solution described in 1 above to adjust IIH to 1 or less, add about 1% of lignin or cellulose to this, and adjust the redox potential of the solution to around +200 mV.

"The ammonia deodorizing ability according to the method in Example 1 is 1! It has the ability to oxidize 1 OOog of anhydrous ammonia to nitrogen gas.

[Effects of the Invention] The present invention utilizes existing equipment, eliminates problems such as maintenance costs, including deodorizer replacement and post-treatment efforts, and produces a low 1) H water extract of active humus. Since the function of oxidizing basic malodors into nitrogen gas etc. is utilized below, the basic malodors of deep beds and other organic sewage or wastes can be oxidized and decomposed into odorless substances.

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Claims (2)

[Claims] (1) A deodorizing agent for basic malodors caused by humus, which is comprised of a mixture of an aqueous extract of active humus, iron salts, an organic or inorganic acid or a mixture thereof, and a solution of an acid-dissolved polymer such as lignin. . (2) An extract is obtained by stirring active humus in hot water or water, ferrous sulfate is dissolved in the extract, and then an organic acid such as citric acid or citric acid and sulfuric acid is added. A method for producing a basic odor deodorizer using humus.