JPH0465698B2 - - Google Patents

Description

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

Conventional technology Conventional deodorizers for basic bad odors such as ammonia and amines have problems in post-treatment such as water washing and sulfuric acid solutions, and ascorbic acid, humic acid and iron salt solutions, etc. Those mainly oxidized by

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

Problems to be Solved by the Invention However, in the above-mentioned intensive processing, the scale of the processing equipment is large and existing equipment cannot be used.
Moreover, there were many problems in replacing the deodorizer and in 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
Utilizing the ability of an aqueous extract of active humus to oxidize basic odors into nitrogen gas under low pH conditions, it is possible to oxidize and decompose basic odors such as human waste and other organic sewage or waste into odorless substances. The purpose of the present invention is to provide a basic malodor deodorizing agent produced by humic substances and a method for producing the same.

[Structure of the invention]

Means for Solving the Problems The present invention eliminates basic odors such as ammonia and amino acids using aqueous extracts of active humus, iron salts, organic or inorganic acids or mixtures thereof, and acid-dissolved polymer solutions such as lignin. It is a liquid mixture consisting of the following, and has the following characteristics depending on the material and manufacturing method.

(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: Heat extraction is carried out by stirring active humus in hot water of 85°C or higher for 30 minutes or more, or stirring at low speed for 6 days or more in water of 4°C or higher until the pH becomes 4.0 or lower. It ends when This extract contains 2% or more of fulvic acid.

Ferrous sulfate is dissolved in the above extract to adjust the iron content to 0.5.

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 rotation 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 uses ammonium or amine complexes consisting of 2% or more fulvic acid and 25% divalent iron ions at a pH range of 1 or less to 3.2 (most reactions are carried out at 2 or less). The conventional mechanism of action is that it acts on salts (generated by organic or inorganic acids captured from basic odors), and the hydrogen peroxide generated at that time oxidizes ammonia or amines to nitrogen gas. different.

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

Further, the iron complex of humic 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.

Furthermore, in order to prevent excessive hydrogen peroxide from being generated, consideration is given to using a material such as lignin that is difficult to decompose and has a negative oxidation-reduction potential, and to maintain the potential from +200 mV on the negative side. The oxidation recovery power (converting ammonium citrate to citric acid) of the iron content-adjusted deodorizer is three times that of the unadjusted agent.

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 fluoric acid will oxidize to carbon dioxide gas.
Unlike oxidation with oxygen, sulfur does not precipitate and ammonia or the like binds thereto, thereby inhibiting the above reaction, nor does butyric acid, which is difficult to oxidize, remain.

The above-mentioned active humus includes natural products containing 5% or more of fulvic acid, 3% or more of humic acid, and 5% or more of each of clay minerals, lignin (matching the content of pellet deodorizer), etc. It is artificial or a mixture thereof, and the pH of its water extract is 4.0 or less and the oxidation potential is more than +200 mV.

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

Extract the active humus with hot water at 85°C or higher while stirring at low speed for at least 30 minutes to make a 30% solution. Also, 4℃
When extracting with water above, it is performed with low speed stirring for 6 days or more. The end point of the above water extraction is 3.2 in terms of pH. This operation yields a solution containing 2% or more of fulvic acid.

Ferrous sulfate was added to this extract to reduce the iron content to 0.5.
%.

Normally, the fulvic acid in the aqueous extract is in the form of an iron complex with a concentration of about 0.3%, so ferrous sulfate 7 crystal water is added at a concentration of 0.8%.
Just add it.

The same amount of citric acid is added to the above adjustment solution to adjust the pH to 1 or less, and about 1% of lignin or cellulose is added to this to adjust the redox potential of the above solution to around +200 mV.

The deodorizing ability of ammonia according to the method of the above embodiment is the ability to oxidize 1000 g of anhydrous ammonia per deodorizing agent to nitrogen gas.

〔Effect of the invention〕

The present invention utilizes existing equipment, eliminates problems such as maintenance costs, including efforts for deodorizer replacement and post-treatment, and removes basic odors with nitrogen under low pH of an aqueous extract of active humus. Since the function of oxidizing to gas etc. is utilized, it has the effect of being able to oxidize and decompose basic malodors such as human waste and other organic sewage or wastes into odorless substances.

Claims (1)

[Scope of Claims] 1. Basicity by humus characterized by comprising 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. A deodorizer for bad odors. 2. A humus characterized by obtaining an extract while stirring active humus in hot water or water, dissolving ferrous sulfate in the extract, and then adding an organic acid such as citric acid or citric acid and sulfuric acid. How to make basic odor deodorizer by quality.