KR20010111883A - A method for preparing enviromental conducts for sewage purification using peats and enviromental conducts prepared by the method - Google Patents

Abstract

The present invention relates to a method for producing an environmental induction agent for water purification using peat, and an environmental induction agent prepared therefrom.

A method of manufacturing an environmental inducing agent by mixing and extruding peat, PVA and water selected with an average particle size of 150mesh, and

Produced by the above method, by applying about 1 to 3kg per 1kg of influent BOD of the waste water is provided an environmental induction agent for treating the waste water.

According to the present invention, the use of an environmental induction agent prepared using peat with excellent cation substitution ability is excellent in environmental pollution purification and activating microorganisms, and continuously produces humic acid that can continue the corrosive action in the reaction system. Therefore, it is possible to improve the purification capacity and to reduce the amount of excess sludge generated and the amount of dehydrated medicine.

Description

Method for producing environmental induction agent for water purification using peat and environmental induction agent produced therefrom {A METHOD FOR PREPARING ENVIROMENTAL CONDUCTS FOR SEWAGE PURIFICATION USING PEATS AND ENVIROMENTAL CONDUCTS PREPARED BY THE METHOD}

The present invention relates to a method for producing an environmental inducing agent for water purification using peat, and an environmental inducing agent prepared therefrom. More specifically, it is easy to use as a wastewater treatment agent by mixing and treating peat and adhesive components having high CEC (cation exchange capacity). The present invention relates to an environmental induction agent that can be purified water.

Conventional wastewater treatment technology is a biological treatment method that decomposes and gasifies and removes organic pollutants by proliferating and culturing aerobic and anaerobic microorganisms, and there are various methods such as standard activated sludge method, catalytic oxidation method, and sprinkling water phase method.

However, in the case of using microorganisms like this, microorganisms are not only cultured after a certain time in a certain volume, but also in the process of decomposing, fermenting, and gasifying organic substances dissolved in wastewater using the cultured microorganisms. There is a problem that odor is generated by ammonia, hydrogen sulfide, methyl mercaptan, or the like generated.

In addition, there are many problems such as low nutrient removal efficiency such as nitrogen and phosphorus, which causes eutrophication. In addition, the use of contact media not only increases the initial investment cost but also causes maintenance problems due to occlusion. will be.

The present invention is to solve the above problems of the prior art, by using a peat existing in a state in which a large amount of organic matter decomposition microorganisms as a natural natural material of nature, odor-causing substances that are mostly present in a cation state in water, After adsorbing nutrients and organic pollutants, it provides a method of manufacturing environmental induction agent for water purification using peat that can not only remove pollutants through decomposition and corrosion process by microorganisms but also improve microbial activity. There is a purpose.

Another object of the present invention is to produce an environmental inducer capable of continuously maintaining the state in the treatment system by continuously producing humic acid having excellent cation substitution ability by continuing the corrosive action when applied to water purification.

Another object of the present invention is to provide an environmental inducer capable of complete treatment in a short period of time by mixing with the waste water to be treated by using the environmental induction agent prepared by the above method and does not generate odor.

Accordingly, the present inventors pay attention to the fact that the odor-causing substances, nutrients, and organic pollutants in the waste water are mostly in an ionic state, and thus, if the environmental inducing agent is manufactured using a material having a very high cation substitution ability, the pollutants may be used. After adsorbing and found that the contaminant can be removed through a process of decomposition and corrosion by microorganisms, the present invention has been completed.

That is, according to one aspect of the present invention,

Peat is pulverized to an average particle size of 150mesh, 0.5 to 1.0% PVA (adhesive ingredients) of the weight of the peat is mixed with water to kneaded and then extruded to provide an environmental induction agent for water purification.

According to the second aspect of the present invention,

Manufactured by the method according to the first aspect, there is provided an environmental induction agent for water quality purification by applying about 1 to 3 kg per 1 kg of influent BOD of wastewater and wastewater.

Hereinafter, the present invention will be described.

In the present invention, by producing an environmental induction agent based on peat, which has a high cation substitution capacity among environmentally friendly materials, consequently, it effectively treats pollutants in wastewater and wastewater.

In the present invention, peat is also known as peat or peat, and is a coal species in which moss and flowering plants are decomposed and changed in wetlands. It is present in the watery sponge phase, fibrous form, or in the form of a lump.

The peat can be collected in a large amount in the natural state, such as in the mountain (mountain) or descent, as well as they can be used as a natural microbial culture agent by aerobic or anaerobic organic decomposition microorganisms present in the state depending on the collected region will be. That is, peat collected from the mountain area is mainly inhabited by aerobic degrading microorganisms such as nitrosomonas and aerobactor. Anaerobic degrading microorganisms such as Escherichia are mainly inhabited, and if such peat is mixed and used properly, it will also function as a microbial culture agent.

The peat described above can be used in the dry and atomized state as much as possible to increase the contact area with the waste and waste water when mixed with the waste and water afterwards, thereby improving the moisture control efficiency and the microbial enrichment efficiency. As such drying and atomization conditions, a conventionally known method can be used. For example, drying is carried out at a temperature of 80 to 90 ° C. in a dry oven for 24 hours to remove moisture and to remove impurities with a classifier of about 5 to 10 mm. Can be.

For reference, the composition table of the peat dried material used in the present invention is as follows.

pH (H ₂ O) pH (KCl) EC (conductivity) T-N (Total Nitrogen) T-P (Total Person) T-K (Total Potassium) CEC (me / 100g) C / N ratio Organic matter Humic acid 4.8 4.40 0.36% 1.92% 0.15% 0.08% 66.5-100 22.6 83.1% 46.01%

* CEC: Cationic Substitution Capability

Such peat is preferably about 150mesh in average particle size to maintain good adhesion and strength.

It is important to determine the mixing ratio to obtain the most desirable strength within the range of minimizing the mixing amount of the adhesive component to the peat pulverized to an appropriate particle size, mixing the adhesive components to obtain a sufficient adhesive effect It is preferable to make ratio into 0.5 to 1.0% or less.

The adhesive component used at this time is not limited to this, but it is most preferable to use PVA in view of adhesive strength and strength.

The peat-adhesive component mixture prepared by the above method may be mixed with metal components of polyvalent ions (silicones, magnesium, etc.), and these metal components have a binding force of sludge with a chelate structure of peat and a metabolite of the microorganism. This strengthens the reduction of sludge amount and promotes dewatering efficiency.

Examples of the metal component include magnesium compounds such as MgSO ₄ of 5 to 10% by weight, and silicon compounds such as elite, zeolite and ceramics to 60 to 80% by weight.

Subsequently, the peat-adhesive component mixture is kneaded to form a slurry, kneaded to a moldable amount, and subjected to an extrusion molding process, wherein the shape of the molding may vary from circular, pellet, amorphous, and the like. Can be. The extrusion process is more preferably carried out under a pressure of about 3 ~ 4kgf / cm ² and temperature conditions of 110 ~ 120 ℃ to obtain the strength required in the present invention.

By the method described above, the mixture of peat-adhesive components is very high in cation substitution ability and varies depending on the characteristics of the wastewater and wastewater, but it is generally about 1 to 3kg per kg of BOD inflow of wastewater per day. When mixed and processed at the same amount of 1kg per 1kg of inflow BOD, odor-causing substances, nutrients and organic pollutants that exist mostly in the state of ionic charge are absorbed by microorganisms such as CH ₄ , NH ₃ , PH _3, etc. after adsorption. It is decomposed and corroded to the compound of, and the mixture of the peat-adhesive component is improved in the state in which the microorganism is greatly enhanced.

Not only this, but also the decomposition and hydrolysis of microorganisms performed in the existing waste and wastewater treatment methods, as well as the corrosive action, continue to produce humic acid with high cation-replacement capacity, thereby continuously purifying functions in the treatment system. For example, there is an advantage of maintaining it for about a year.

Looking specifically at the reaction mechanism,

(1) ability to remove odor-causing substances, nutrients and organic pollutants

Odor-causing substances and nutrients, which are pollutants in the waste water and waste water, are mostly ionic substances, and are stabilized by adsorption and decomposition and corrosion of microorganisms by the environmental inducing agent.

(2) microbe induction

In general biological treatment methods, organic pollutants are purified by hydrolysis and decomposition, but the microorganisms induced by the environmental inducing agent increase the removal efficiency of contaminants in the treatment system because the corrosive action is performed in addition to the above action. .

(3) recycled water and sludge

Treated water and sludge of the wastewater treatment system using the environmental induction agent is a component having a high CEC (ion adsorption capacity) generated by the environmental induction agent and microorganisms, and the treated water and the sludge are also excellent in the binding power and can be recycled as a fertilizer.

Hereinafter, the present invention will be described in detail through examples. The following examples are intended to illustrate the invention and are not intended to limit the invention thereto.

<Example>

Example 1 Preparation of Environmental Induction Agents

Filter out coarse grains of peat, dry the oven at 80-90 ℃ for 24 hours, remove moisture, remove coarse grains with a classifier of 5-10mm, and then weigh the peat powder crushed to an average particle size of 150mesh. 1% of PVA and water were mixed and kneaded to a moldable degree.

Then, by molding under a pressure of about 3 ~ 4kgf / cm ² and a temperature of 110 ~ 120 ℃ to prepare a molding of about 3cm.

Experimental Example 1-Organic Removal Effect

Put the environmental induction agent prepared in Example 1 into a pilot (single reaction tank) manufactured in Lab type and apply the same amount of 1kg per 1kg of influent wastewater BOD per day, and then measure BOD and COD _cr and SS in the influent and the effluent. The results are shown in Table 2 below.

For reference, the removal efficiencies of the standard activated sludge method were BOD 80-90%, COD 75-85%, and SS 80-90%.

Influent (mg / ℓ) Effluent (mg / ℓ) Removal efficiency (%) BOD 60-290 1.2-18 91.1 COD _cr 118.7-900 12.5-90 86.8 SS 57-830 0.4-37 93.7

As can be seen from the table, the organic material removal effect was confirmed that the removal efficiency was higher than the standard activated sludge method by adsorbing and removing the ionic material in the organic pollutant using peat with excellent cation substitution ability. The above results can be inferred that the treatment efficiency will be increased when applied to the demonstration plant, considering that the structure is somewhat insufficient using a single reactor.

Experimental Example 2-nutrient salt concentration

The nutrient concentrations were measured in each of the influent and the effluent of the wastewater passed through Experimental Example 1, and the results are shown in Table 3 below.

For reference, the removal efficiencies of the standard activated sludge method were T-N 20-30% and T-P 20-30%.

Influent (mg / ℓ) Effluent (mg / ℓ) Removal efficiency (%) T-N 13.7-49.5 5.7 to 21.6 52.8 T-P 1.3 to 3.7 0.7 to 2.0 47.3

As can be seen from the _{^{table, NH 4 +, NO 2 -}} , NO 3 - removal of the nutrient effect as PO ₄ ^3-, and was also confirmed that the above-mentioned improvement over the standard activated sludge process.

Experimental Example 3- Odor Test

The malodor of the treated water obtained in Experimental Example 2 was measured by a sensory test, and the results are shown in Table 4 below.

enemy Reactor stink 4 degrees or more 1 degree or less

As described above, it was also confirmed that not only organic pollutants and nutrients are effectively removed, but also a large number of odor components are adsorbed and removed.

Experimental Example 4-Sludge Generation

In order to show the binding force and the generating force for the sludge generated by applying the environmental inducing agent prepared in Example 1 and the general activated sludge, the effect of improving the amount of excess sludge and dehydration efficiency are shown in Table 5 below. At this time, one kind of polymer flocculant for wastewater treatment was used as a chemical for measuring dehydration efficiency.

General activated sludge Environmental induction agent applied Remarks Surplus Sludge Production 135kg / day 72kg / day BOD, SS 100kg / day Dehydration Drug Requirements 1.1kg / day 0.5kg / day

As can be seen from the table, it was confirmed that not only the amount of excess sludge is significantly reduced but also the amount of dehydration chemicals is significantly reduced by strengthening the binding force with the sludge and removing by adsorption.

According to the above, by using an environmental induction agent prepared using peat having excellent cation substitution ability, it is not only excellent in environmental pollution purification and ability to activate microorganisms, but also has excellent cation substitution ability by continuing the corrosive action in the reaction system. Humic acid can be continuously maintained, reducing the amount of excess sludge and dehydration requirements, and can be used as fertilizer as it has excellent cation exchange capacity of the discharged treated water.

Claims (3)

Peat is ground to an average particle size of 150mesh, 0.5 ~ 1.0% PVA (adhesive ingredient) and the water of the amount to be kneaded together, and then extruded together, the environmental induction agent for water quality purification using peat, characterized in that Manufacturing method The method according to claim 1, further comprising at least one metal component of polyvalent ions such as MgSO ₄ , elvan, silicon compounds, elites and zeolites. Prepared by the method according to claim 1 or 2, the environmental induction agent for water purification to treat the waste water by applying about 1 ~ 3kg per 1kg of inflow BOD of waste water