阅读说明：本技术 一种污水处理厂污泥的处理方法及有机肥及其制备方法 (Treatment method of sludge of sewage treatment plant, organic fertilizer and preparation method of organic fertilizer ) 是由 夏召才 于 2020-05-20 设计创作，主要内容包括：本发明公开了一种污水处理厂污泥的处理方法及有机肥及其制备方法,属于污泥回收利用技术领域。其技术要点包括以下步骤：S1.将15-25份食用菌菌渣倒入发酵容器中,在常温下恒温发酵45天以上；S2.将发酵好的食用菌菌渣取出并添加至35-45份污泥中,加入0.1-0.3份除臭剂,搅拌均匀后,将物料倒入发酵容器中,在常温下恒温发酵15-20天；S3.向发酵容器中加入3-6份的烟草,搅拌均匀,即可完成污水处理厂污泥的处理,具有降低处理污泥的成本,并能够将处理后的污泥进行直接利用的优点。(The invention discloses a treatment method of sludge in a sewage treatment plant, an organic fertilizer and a preparation method thereof, belonging to the technical field of sludge recycling. The technical key points comprise the following steps: s1, pouring 15-25 parts of edible fungus residues into a fermentation container, and fermenting at constant temperature for more than 45 days at normal temperature; s2, taking out the fermented edible fungus residues, adding the fermented edible fungus residues into 35-45 parts of sludge, adding 0.1-0.3 part of deodorant, uniformly stirring, pouring the materials into a fermentation container, and fermenting at constant temperature for 15-20 days at normal temperature; and S3, adding 3-6 parts of tobacco into the fermentation container, and uniformly stirring to finish the treatment of the sludge of the sewage treatment plant, so that the method has the advantages of reducing the cost of treating the sludge and directly utilizing the treated sludge.)

1. A method for treating sludge of a sewage treatment plant is characterized by comprising the following steps:

s1, pouring 15-25 parts of edible fungus residues into a fermentation container, and fermenting at constant temperature for more than 45 days at normal temperature;

s2, taking out the fermented edible fungus residues, adding the fermented edible fungus residues into 35-45 parts of sludge, adding 0.1-0.3 part of deodorant, uniformly stirring, pouring the materials into a fermentation container, and fermenting at constant temperature for 15-20 days at normal temperature;

and S3, adding 3-6 parts of tobacco into the fermentation container, and uniformly stirring to complete the treatment of the sludge in the sewage treatment plant.

2. The method for treating sludge of sewage treatment plant according to claim 1, wherein the deodorant is a microbial deodorant.

3. An organic fertilizer, characterized by comprising a base material prepared by the method for treating sludge of a sewage treatment plant according to claim 1.

4. The organic fertilizer of claim 3, further comprising 15-20 parts of a calcium source, 6-9 parts of a mixture of a phosphorus source and a potassium source, and 6-9 parts of a nitrogen source.

5. The organic fertilizer of claim 4, wherein the calcium source is shell, the phosphorus source and the potassium source are plant ash, and the nitrogen source is fermented bean dregs.

6. The preparation method of the organic fertilizer is characterized by comprising the following steps:

s1, pouring bean dregs in corresponding weight parts into a fermentation container, and fermenting for 7-10 days at 60-70 ℃ to obtain fermented bean dregs;

s2, adding the fermented bean dregs, shells and plant ash in corresponding parts by weight into the base material, uniformly stirring, crushing by a crusher, and filtering by a filter sieve to obtain upper-layer filter dregs and lower-layer filter liquor;

and S3, crushing the filter residues by using a crusher, adding the filtrate again, and filtering by using a filter sieve again until no filter residues exist on the upper layer of the filter sieve, wherein the obtained filtrate is the organic fertilizer.

7. The method for preparing the organic fertilizer as claimed in claim 6, wherein the mesh number of the filter sieve is 4-6 meshes.

8. The preparation method of the organic fertilizer as claimed in claim 6, further comprising the following steps:

s4, detecting the organic fertilizer by a fertilizer detector, and judging the content of nitrogen, phosphorus and potassium in the organic fertilizer;

s5, if the content indexes of nitrogen, phosphorus and potassium in the detection report of the fertilizer detector meet the NY525-2011 standard of the biological organic fertilizer, completing the preparation of the organic fertilizer; if the content of nitrogen, phosphorus and potassium in the detection report is not enough, the content indexes of nitrogen, phosphorus and potassium in the organic fertilizer by correspondingly adding a nitrogen source, a phosphorus source and a potassium source meet the NY525-2011 standard of the biological organic fertilizer.

Technical Field

The invention belongs to the technical field of sludge recycling, and particularly relates to a treatment method of sludge of a sewage treatment plant and an application and preparation method thereof.

Background

With the development of industrialization and the acceleration of urbanization in China, a large amount of industrial sludge and domestic sludge are generated, the sludge has high water content, contains a large amount of pathogenic bacteria, parasitic ova, chromium, lead and other heavy metal toxic and harmful substances, is a pollutant with complex property, high pollutant content and huge potential environmental risk, and the sludge treatment problem becomes a large environmental protection problem which needs to be solved urgently in the current society.

The invention discloses a sludge treatment method in Chinese patent with publication number CN107285580B, which comprises the following steps: step 1: acidizing; step 2: mechanical dehydration, namely dehydrating the acidified sludge through a squeezer; and step 3: carrying out incineration treatment, namely conveying the dewatered sludge to an incinerator and mixing and incinerating the sludge with a combustion improver; and 4, step 4: and (4) tail gas treatment, wherein tail gas generated after sludge is incinerated is treated and then is discharged.

However, the sludge also contains organic matters, nitrogen, phosphorus, potassium and various trace elements with potential utilization values, and the sludge is incinerated at first, so that the treatment cost of the sludge is increased, and the waste of resources is caused.

Therefore, a new solution is needed to solve the above problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method for treating sludge in a sewage treatment plant, which has the advantages of reducing the cost for treating the sludge and directly utilizing the treated sludge.

The invention also aims to provide the organic fertilizer which has the advantages of recycling the sludge, reducing the production cost and having the insect expelling effect.

The third purpose of the invention is to provide a preparation method of an organic fertilizer, which can improve the N, P, K content in the organic fertilizer and ensure the fertilizing effect of the organic fertilizer.

In order to achieve the first purpose, the invention provides the following technical scheme:

a method for treating sludge of a sewage treatment plant comprises the following steps:

s1, pouring 15-25 parts of edible fungus residues into a fermentation container, and fermenting at constant temperature for more than 45 days at normal temperature;

s2, taking out the fermented edible fungus residues, adding the fermented edible fungus residues into 35-45 parts of sludge, adding 0.1-0.3 part of deodorant, uniformly stirring, pouring the materials into a fermentation container, and fermenting at constant temperature for 15-20 days at normal temperature;

and S3, adding 3-6 parts of tobacco into the fermentation container, and uniformly stirring to complete the treatment of the sludge in the sewage treatment plant.

By adopting the technical scheme, the edible fungus residues are poured into the fermentation container for fermentation, organic matters in the edible fungus residues are decomposed after the fermentation of microorganisms to generate effective fertilizer components and form humus, then the fermented edible fungus residues are added into sludge and stirred, and the migration of the element by the humus mainly shows the surface adsorption and ion exchange adsorption effects of organic colloid on metal ions and the integration and complexation effects of humic acid on the element. In an environment rich in humus, elements such as Cu, Pb, Zn, Fe, Mn, T, Ni and the like can be called organic colloid adsorption and can be greatly transferred along with water. The humus forms complexes with heavy metals such as Fe, Al, Ti, U, V and the like, is easily dissolved in neutral, weakly acidic and weakly alkaline media, and migrates in the form of complexes. The water carries the substances which are complexed into the sludge out of the fermentation container, the humus is continuously reduced along with the time, and when the humus is deficient, the substances which are insoluble are formed and precipitate, so that the heavy metal in the sludge is removed, and the sludge has good inhibition effect on the propagation of harmful bacteria; and finally, adding tobacco into the sludge, and killing harmful bacteria and worm eggs in the sludge through the tobacco to finish the sludge treatment work.

More preferably, the edible mushroom dregs are mushroom dregs.

More preferably, the deodorant is a microbial deodorant.

By adopting the technical scheme, in the fermentation process of the biological deodorant, the contained functional microbial bacteria and metabolites thereof can effectively remove malodorous gases such as hydrogen sulfide, ammonia gas and the like generated in sludge; and microorganisms and metabolites in the fermentation product can generate certain complexing, degrading and removing effects with heavy metals in the sludge, so that the effect of reducing the content of the heavy metals in the sludge is achieved.

In order to achieve the second purpose, the invention provides the following technical scheme:

an organic fertilizer comprising a base material prepared by the method of treating sludge from a sewage treatment plant according to claim 1.

Through adopting above-mentioned technical scheme, contain abundant N, P, K element in the edible fungi fungus sediment after the fermentation and the mud of handling, regard the base material as the fertilizer, can provide enough fertilizer branch for the soil, and the tobacco has the effect of expelling parasite for the fertilizer has the expelling parasite effect to the nematode in the ground, cutworm, big tooth, armyworm and black shell worm, thereby avoids the invasion and attack of plant pest.

More preferably, the fertilizer also comprises 15-20 parts of a calcium source, 6-9 parts of a mixture of a phosphorus source and a potassium source and 6-9 parts of a nitrogen source.

By adopting the technical scheme, 15-20 parts of a mixture of a calcium source, 6-9 parts of a phosphorus source and a potassium source and 6-9 parts of a nitrogen source are added into the base material, so that the content of calcium, phosphorus, potassium and nitrogen elements in the base material can be improved, and the produced organic fertilizer can meet the requirements of NY525-2011 bio-organic fertilizer standards on the content of phosphorus, potassium and nitrogen elements in the organic fertilizer.

More preferably, the calcium source is shells, the phosphorus source and the potassium source are plant ash, and the nitrogen source is fermented bean dregs.

By adopting the technical scheme, the shells, the plant ash and the fermented bean dregs are added into the base material, so that the contents of calcium, phosphorus, potassium and nitrogen elements can be supplemented, the purchase cost of the shells, the plant ash and the fermented bean dregs is lower, and the production cost of the organic fertilizer can be reduced.

Further, plant ash is purchased from thermal power plants.

In order to achieve the third purpose, the invention provides the following technical scheme:

the preparation method of the organic fertilizer is characterized by comprising the following steps:

s1, pouring bean dregs in corresponding weight parts into a fermentation container, and fermenting for 7-10 days at 60-70 ℃ to obtain fermented bean dregs;

s2, adding the fermented bean dregs, shells and plant ash in corresponding parts by weight into a base material, uniformly stirring, crushing by a crusher, and filtering by a filter sieve to obtain upper-layer filter dregs and lower-layer filter liquor;

and S3, crushing the filter residues by using a crusher, adding the filtrate again, and filtering by using a filter sieve again until no filter residues exist on the upper layer of the filter sieve, wherein the obtained filtrate is the organic fertilizer.

Through adopting above-mentioned technical scheme, after the fermented bean dregs, shell and plant ash added the base-material to the stirring is smashed through the breaker, can make fermented bean dregs, shell and plant ash broken completely, thereby is convenient for the plant to the absorption of fertilizer.

More preferably, the mesh number of the filter screen is 4-6 meshes.

By adopting the technical scheme, the mesh number of the filter screen is 4 meshes, so that the bean dregs, the shells and the plant ash after fermentation can be completely crushed, and the plants can absorb the organic fertilizer conveniently.

More preferably, the mesh number of the filter screen is 4 meshes.

More preferably, the method further comprises the following steps:

s4, detecting the organic fertilizer by a fertilizer detector, and judging the content of nitrogen, phosphorus and potassium in the organic fertilizer;

s5, if the content indexes of nitrogen, phosphorus and potassium in the detection report of the fertilizer detector meet the NY525-2011 standard of the biological organic fertilizer, completing the preparation of the organic fertilizer; if the content of nitrogen, phosphorus and potassium in the detection report is not enough, the content indexes of nitrogen, phosphorus and potassium in the organic fertilizer by correspondingly adding a nitrogen source, a phosphorus source and a potassium source meet the NY525-2011 standard of the biological organic fertilizer.

In summary, compared with the prior art, the invention has the following beneficial effects:

(1) the sludge is treated by the fermented edible fungi, so that heavy metals in the sludge can be effectively removed, the bean dregs and the sludge can be effectively and fully utilized, and the waste of resources is avoided;

(2) through the addition of the tobacco, the effects of sterilizing and killing worm eggs on the sludge can be achieved, and the organic fertilizer added into the tobacco has an insect-expelling effect in the later use process.

Detailed Description

The present invention will be described in detail with reference to examples.