KR20070009962A - Manufacturing process of mulching clay using organic wasted materials - Google Patents

Abstract

Provided is a method for manufacturing covering materials using organic wastes, which is simplified as compared with conventional processes, reduces generation of bad smells, saves a disposal cost of organic wastes, and is an economic and environment-friendly process. The method for manufacturing covering materials using organic wastes comprises the steps of: (1) dehydrating sewage sludge with a belt press and putting the obtained sludge having a water content of 80-85% into a mixing tank; (2) putting a fermentation accelerator, which is obtained by mixing quicklime: sodium hydroxide: magnesium sulfate: sulfur-containing water: Chlorkalk in a weight ratio of 60%:20%:10%:5%:5%, into the mixing tank containing sludge, wherein a weight ratio of the sewage sludge to the fermentation accelerator is 85%:15%; (3) putting the sewage sludge containing an fermentation accelerator into a fermentation tank, making the tank closed, keeping oxygen supply, temperature, and humidity at levels desirable for the optimum fermentation condition, sending the generated methane gas to a washing tower, purifying the methane gas with falling water to be discharged, and solidifying the sludge in the fermentation tank while purifying harmful materials; (4) naturally drying covering materials made of the solidified sludge for 48hours using sunlight and winds; and (5) checking the quality of the covering materials and then shipping the covering materials.

Description

Manufacturing process of mulching clay using organic wasted materials

1 is a process diagram of the present invention

※ Explanation of symbols for main parts of drawing

 1-sludge dosing process 2-mixing process 3-fermentation process

 4- Drying Process 5-Product Shipping Process

The present invention relates to a method for producing a cover material (유기) using an organic waste, and more specifically, to a method for producing an alkaline cover material by adding a fermentation agent to sewage sludge or food waste.

Conventional sewage sludge has been mainly treated by marine dumping methods. Today, due to international conventions, marine dumping has been banned, and there has been known a method for recycling organic waste such as food waste into livestock feed or organic fertilizer. In the case of the fermentation process is difficult, and in the case of organic fertilizer, there is a problem such as inhibiting the growth of plants due to excessive salt content.

The present invention has been made to solve the above problems, the present invention relates to a method of making a cover material by mixing and stirring an appropriate amount of fermentation agent in organic waste such as sewage sludge, the manufacturing process thereof is a sludge input process → mixing process → fermentation process → drying process → product release process. The cover material manufactured by the above method can be used for the cover of landfill.

In general, organic materials consume oxygen when they are decomposed, and when sewage sludge is directly buried in the soil, oxygen is depleted in the soil due to the rapid decomposition of sewage sludge, which damages the growth of various organisms in the soil. In the ratio of carbon (C) and nitrogen (N), that is, the ratio of C / N, the carbon content is higher than that of nitrogen, which is a nitrogen starvation that reduces the nitrogen content available to plants by reacting and consuming carbon content in the soil. As the phenomenon occurs, the present invention is to ferment the conventional sewage sludge first before landfill, so that carbon is converted into carbon dioxide and evaporated into the atmosphere so that the soil is not deteriorated when it is landfilled.

Therefore, the present invention is to prepare a cover material using organic waste, such as sewage sludge, which is easy to decompose, which is previously decomposed by fermentation method before being directly landfilled as organic waste in landfill, as a method thereof, such as quicklime in sewage sludge. The lime stabilization method for stabilizing organic wastes by mixing fermentation agents is a weak alkaline chemical treatment method. The fermentation agent components used in the stabilization method are quicklime, caustic soda, magnesium sulfate (MgSO₄), sulfuric acid water (sulfur water) and A fermentation agent made by mixing a ratio of 60%: 20%: 10%: 5%: 5% by weight of Caulk (Ca (OCl₂)) is added to the sewage sludge and mixed and stirred. A slightly alkaline cover material is prepared by mixing the weight ratio of the fermenting agent in a ratio of 85%: 15%.

Referring to the process of manufacturing a cover material in detail based on the drawings as follows.

※ Step 1: Sludge Injecting Process (1)

The process of putting sewage sludge with water content of 80 ~ 85% into the hopper of the mixing tank as the sewage sludge is collected in the sewage treatment plant and compressed into a belt press.

※ The second process: Mixing process (2)

Fermentation agent mixed with quicklime, caustic soda, magnesium sulphate, sulfur water and glocalk in a ratio of 60%: 20%: 10%: 5%: 5% is added to the above-mentioned sludge mixed tank. Mixing and stirring the fermentation agent in a weight ratio of 85%: 15% and then injecting it into the fermentation tank.

※ 3rd process: Fermentation process (3)

When the fermentation agent is decomposed in a closed state of the mixing tank, oxygen is sufficiently supplied, and methane gas is generated by fermentation by maintaining the temperature and humidity at an optimum condition for fermentation for 10 hours, and the methane gas is washed. Water drops falling from the top of the washing tower purify the methane gas and discharge it, and the sludge in the mixing tank is decomposed to purify the harmful substances and disintegrate the protein contained in the organic matter as well as sterilization and insecticide, and the sludge solidifies and heavy metals. Alkaline fermentation process to stabilize the.

※ 4th process: Drying process (4)

After drying the sludge from the fermentation process of the third process, it is taken out from the mixing tank and completely dried for about two days (48 hours) by using sunlight and natural wind, which makes it harmless to the plants and the human body. Unique dirt and odors are significantly reduced through fermentation.

※ 5th process: product shipping process (5)

By going through the drying process, the organic material is stabilized and the quality of the cover material made of solidified sludge is inspected and shipped to be used as cover material of landfills.

As described above, the present invention purifies and discharges methane gas through the mixing process (2) and the fermentation process (3) in the manufacture of cover material using organic waste, purifying the harmful substances as the sludge in the mixing tank is decomposed and sterilized. By shortening the manufacturing process, it reduces the processing cost of product recycling, reduces the occurrence of odors, suppresses the rise in PH, and enhances the compressive strength to improve workability at landfills, and replaces dumping materials in landfills by replacing ocean dumping. Therefore, there is a practical and economic effect such as creating a pleasant environment and reducing processing costs.

Claims (1)

Dewatering Sewage Sludge with Belt Press to Inject Sludge with Water Content of 80 ~ 85% to Mixing Tank (Stage 1) and 60% of the weight ratio of Quicklime to Caustic Soda to Magnesium Sulfate to Sulfur Water to Chlorkal 20%: 10%: 5%: 5% of the fermentation agent is mixed into the mixing tank with the sludge, but the mixing ratio of the sewage sludge to fermenter in a ratio of 85%: 15% The second step) and the sewage sludge mixed with fermentation agent are put into the fermentation tank to make a sealed state, and the methane gas generated by keeping oxygen supply and temperature and humidity at the optimum condition for fermentation is sent to the scrubber and purified by falling water. The sludge in the fermentation tank and purify the harmful substances and solidify the fermentation process (the third process) and the cover agent made of the solidified sludge for 48 hours with sunlight and natural wind. The key is the manufacturing method of cover material using organic waste, characterized in that the drying process (fourth step) and the product loading step (5th step) that is shipped after quality inspection and used as landfill landfill. .

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