CN107487823B - Sewage treatment agent and preparation method thereof - Google Patents

Abstract

The invention discloses a sewage treatment agent, which comprises: polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, modified zeolite, an oxidant, a catalyst, a metal remover, a buffering agent and activated carbon powder. The sewage treatment agent can effectively reduce the pollution degree of various sewages to the environment, has wide pollutant treatment range, good effect, short process flow and high operation safety, can be applied to pulping and papermaking wastewater, oil-containing wastewater of oil refineries, municipal sewage and the like, has wide applicability and is environment-friendly.

Description

Sewage treatment agent and preparation method thereof

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment agent and a preparation method thereof.

Background

The industrial wastewater refers to wastewater, sewage and waste liquid generated in the industrial production process, and contains industrial production materials, intermediate products and products which are lost along with water, and pollutants generated in the production process. With the rapid development of industry, the variety and quantity of waste water are rapidly increased, the pollution to water bodies is more and more extensive and serious, and the health and the safety of human beings are threatened. Therefore, the treatment of industrial wastewater is more important than the treatment of municipal sewage for environmental protection.

The existing treatment methods for treating printing and dyeing sewage mainly comprise a biological method, an electrolytic method, a chemical method and a photocatalytic method. The biological method has large floor area, narrow application range and unsatisfactory effect; although the electrolytic method has better effect than the biological method, the electrolytic method has large energy consumption and difficult popularization. The photocatalytic method has attracted attention because it can completely mineralize organic substances and has no secondary pollution, but the photocatalytic method has an effect on precipitating suspended substances, is not ideal for reducing COD, BOD and chroma, and particularly has a poorer deodorizing effect, and can bring secondary pollution, so that the pollution problem cannot be fundamentally solved. The chemical treatment method is to treat pollutants by using the added chemical reagent, including neutralization, flocculation, oxidation reduction and other reactions, and the method is thorough in sewage treatment and can reach the discharge standard after treatment. The sewage treatment agent is the main raw material of the chemical treatment method. The water treatment agent is also called flocculant and has wide application in the treatment of domestic water, industrial wastewater and sewage. The organic synthetic polymer flocculant comprises artificially synthetic polymer flocculants such as polyacrylamide and the like, and is widely applied due to good flocculation effect and small dosage.

Disclosure of Invention

In order to solve the problems, the invention provides the sewage treatment agent which can effectively reduce the pollution degree of various sewages to the environment, has wide pollutant treatment range, good effect, short process flow, high operation safety, wide applicability and environment friendliness, and can be applied to pulping and papermaking wastewater, oil-containing wastewater of oil refineries, municipal sewage and the like.

The technical scheme adopted by the invention is as follows: a sewage treatment agent comprises the components of polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, modified zeolite, an oxidant, a catalyst, a metal remover, a buffering agent and activated carbon powder;

further, the components by mass percent are as follows: 20-40% of polyaluminium chloride, 5-8% of polyacrylamide, 5-8% of ammonium dihydrogen phosphate, 10-15% of modified zeolite, 5-10% of an oxidant, 1-5% of a catalyst, 1-5% of a metal remover, 1-5% of a buffering agent and the balance of activated carbon powder;

further, the modified zeolite is prepared by adopting the following method: grinding zeolite into powder of 150-300 meshes, soaking the powder for 3 to 6 hours at the temperature of between 50 and 100 ℃ by using an organic acid modifier, and then adding a compound surfactant; the organic acidic modifier is one or more of malic acid, oxalic acid, lactic acid, citric acid, oxalic acid, naphthylacetic acid and indolebutyric acid; the compound surfactant is a mixture of fatty alcohol-polyoxyethylene ether and sodium dodecyl benzene sulfonate;

further, the oxidant is one or two of hydrogen peroxide and sodium hypochlorite;

further, the catalyst is polyvinyl alcohol with the concentration of 80-98 percent and dimethyl sulfoxide with the concentration of 90-95 percent;

further, the metal remover is EDTA;

further, the buffer is sodium bicarbonate.

The invention also discloses a preparation method of the sewage treatment agent, which comprises the following specific steps:

1) mixing polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, modified zeolite, a metal remover, a catalyst and activated carbon powder in proportion, adding water with the weight 3-5 times of that of the mixture, and uniformly stirring; the components are calculated according to the mass percentage: 20-40% of polyaluminium chloride, 5-8% of polyacrylamide, 5-8% of ammonium dihydrogen phosphate, 10-15% of modified zeolite, 5-10% of an oxidant, 1-5% of a catalyst, 1-5% of a metal remover, 1-5% of a buffering agent and the balance of activated carbon powder;

2) adding the mixture obtained in the step 1) into a material barrel, adding a buffering agent, loosening the material, and stirring for 5-10h at 30-60 ℃;

3) drying the stirred material at 40-80 ℃, adding an oxidant, and crushing to 50-200 meshes of powder to obtain a product sewage treatment agent;

further, the modified zeolite is prepared by adopting the following method: grinding zeolite into powder of 150-300 meshes, soaking the powder for 3 to 6 hours at the temperature of between 50 and 100 ℃ by using an organic acid modifier, and then adding a compound surfactant; the organic acidic modifier is one or more of malic acid, oxalic acid, lactic acid, citric acid, oxalic acid, naphthylacetic acid and indolebutyric acid; the compound surfactant is a mixture of fatty alcohol-polyoxyethylene ether and sodium dodecyl benzene sulfonate;

further, the oxidant is one or two of hydrogen peroxide and sodium hypochlorite; the catalyst is polyvinyl alcohol with the concentration of 80-98% and dimethyl sulfoxide with the concentration of 90-95%; the metal remover is EDTA; the buffer is sodium bicarbonate.

The invention has the beneficial effects that:

compared with the sewage treating agent in the prior art, the sewage treating agent can effectively reduce the pollution degree of various kinds of sewage to the environment, has wide pollutant treating range, good effect, short process flow and high operation safety, can be applied to pulping and papermaking wastewater, oil-containing wastewater of oil refineries, urban sewage and the like, has wide applicability and is environment-friendly.

Detailed Description

Example 1:

the sewage treatment agent is prepared from the following components in parts by weight:

20% of polyaluminium chloride, 5% of polyacrylamide, 8% of ammonium dihydrogen phosphate, 10% of modified zeolite, 5% of hydrogen peroxide, 5% of polyvinyl alcohol with the concentration of 98%, 5% of EDTA, 5% of sodium bicarbonate and the balance of activated carbon powder;

the modified zeolite is prepared by adopting the following method: grinding zeolite into 150-mesh powder, soaking in 30% concentration naphthylacetic acid ethanol solution with weight 3 times that of zeolite at 50 deg.C for 6 hr, adding 3 times weight of zeolite and 30% concentration fatty alcohol-polyoxyethylene ether and sodium dodecyl benzene sulfonate at a weight ratio of 1: 1; and drying the product to obtain the modified zeolite.

(II) the preparation method comprises the following steps:

1) mixing polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, modified zeolite, EDTA, 98% polyvinyl alcohol and activated carbon powder in proportion, adding water in an amount which is 3 times of the weight of the mixture, and uniformly stirring;

2) adding the mixture obtained in the step 1) into a material barrel, adding a buffering agent according to a proportion, loosening the material, and stirring for 5 hours at 30 ℃;

3) and drying the stirred material at 60 ℃, adding hydrogen peroxide in proportion, and crushing to 200-mesh powder to obtain the product sewage treatment agent.

Example 2:

the sewage treatment agent is prepared from the following components in parts by weight:

40% of polyaluminium chloride, 8% of polyacrylamide, 5% of ammonium dihydrogen phosphate, 15% of modified zeolite, 5% of sodium hypochlorite, 5% of polyvinyl alcohol with the concentration of 98%, 5% of a metal remover, 5% of sodium bicarbonate and the balance of activated carbon powder;

the modified zeolite is prepared by adopting the following method: grinding zeolite into 150-mesh powder, soaking in 30% concentration naphthylacetic acid ethanol solution with weight 3 times that of zeolite at 50 deg.C for 6 hr, adding 3 times weight of zeolite and 30% concentration fatty alcohol-polyoxyethylene ether and sodium dodecyl benzene sulfonate at a weight ratio of 1: 1; and drying the product to obtain the modified zeolite.

(II) the preparation method comprises the following steps:

1) mixing polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, modified zeolite, EDTA, 98% polyvinyl alcohol and activated carbon powder in proportion, adding water in an amount which is 3 times of the weight of the mixture, and uniformly stirring;

2) adding the mixture obtained in the step 1) into a material barrel, adding a buffering agent according to a proportion, loosening the material, and stirring for 5 hours at 60 ℃;

3) and drying the stirred material at 60 ℃, adding sodium hypochlorite according to a proportion, and crushing to 200-mesh powder to obtain the product sewage treatment agent.

Comparative example:

the sewage treatment agent is prepared from the following components in parts by weight:

40% of polyaluminium chloride, 8% of polyacrylamide, 5% of ammonium dihydrogen phosphate, 15% of 150-mesh zeolite powder, 5% of polyvinyl alcohol with the concentration of 98%, 5% of a metal remover, 5% of a buffering agent and the balance of activated carbon powder.

(II) the preparation method comprises the following steps:

1) mixing polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, zeolite, Span-80, 98% polyvinyl alcohol and activated carbon powder in proportion, adding water with the weight 3 times of that of the mixture, and uniformly stirring;

2) adding the mixture obtained in the step 1) into a material barrel, adding a buffering agent according to a proportion, loosening the material, and stirring for 5 hours at 60 ℃;

3) and drying the stirred material at 60 ℃, and crushing the dried material into 200-mesh powder to obtain the product sewage treatment agent.

Example 4:

comparative tests were conducted on the wastewater treatment agents of examples 1-2 and comparative examples, with the following groups:

group A1: the sewage treatment agent prepared in example 1 is used, and the using amount is 100 mg/L;

group A2: the sewage treatment agent prepared in the example 2 is used, and the using amount is 200 mg/L;

group B: the sewage treatment agent prepared in the comparative example is used, and the using amount is 200 mg/L;

group C: no sewage treatment agent was used.

Table 1 comparative test of effects

Group of	COD	BOD6	SS
				A1	50	10	10
A2	20	5	5
				B	60	20	20
C	250	140	150

According to the effect comparison test, the sewage treatment agent disclosed by the invention can effectively reduce the pollution degree of various sewages to the environment, and is wide in pollutant treatment range and good in effect.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes and modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.

Claims (2)

1. The sewage treatment agent is characterized by comprising the following components in percentage by mass: 20-40% of polyaluminium chloride, 5-8% of polyacrylamide, 5-8% of ammonium dihydrogen phosphate, 10-15% of modified zeolite, 5-10% of an oxidant, 1-5% of a catalyst, 1-5% of a metal remover, 1-5% of a buffering agent and the balance of activated carbon powder; the modified zeolite is prepared by adopting the following method: grinding zeolite into powder of 150-300 meshes, soaking the powder for 3 to 6 hours at the temperature of between 50 and 100 ℃ by using an organic acid modifier, and then adding a compound surfactant; the organic acidic modifier is naphthylacetic acid; the compound surfactant is a mixture of fatty alcohol-polyoxyethylene ether and sodium dodecyl benzene sulfonate; the oxidant is one or two of hydrogen peroxide and sodium hypochlorite; the catalyst is polyvinyl alcohol with the concentration of 80-98% and dimethyl sulfoxide with the concentration of 90-95%; the metal remover is EDTA; the buffer is sodium bicarbonate.

2. The preparation method of the sewage treatment agent according to claim 1, comprising the following steps:

1) mixing polyaluminium chloride, polyacrylamide, ammonium dihydrogen phosphate, modified zeolite, a metal remover, a catalyst and activated carbon powder in proportion, adding water with the weight 3-5 times of that of the mixture, and uniformly stirring; the components are calculated according to the mass percentage: 20-40% of polyaluminium chloride, 5-8% of polyacrylamide, 5-8% of ammonium dihydrogen phosphate, 10-15% of modified zeolite, 5-10% of an oxidant, 1-5% of a catalyst, 1-5% of a metal remover, 1-5% of a buffering agent and the balance of activated carbon powder;

2) adding the mixture obtained in the step 1) into a material barrel, adding a buffering agent, loosening the material, and stirring for 5-10h at 30-60 ℃;

3) and drying the stirred material at 40-80 ℃, adding an oxidant, and crushing to 50-200 meshes of powder to obtain the product sewage treatment agent.