KR20040027835A - Treatment method for organic wastewater - Google Patents

Abstract

According to the present invention, organic wastewater, such as domestic sewage and sewage, is made of active corrosive substances and active minerals containing luteum rock or dacite-like pumice. It is a process to cultivate corrosive microorganisms that convert to corrosive substances and microorganisms having mutual symbiosis with these microorganisms. The pretreatment process pretreatment of wastewater solids by primary screen (1), settling paper (2), dehydrator (6) or vibrating detail screen (7). In biological treatment, organic matters are corroded with macromolecular substances as corrosive substances as macromolecules in the culture vessel 15 equipped with pellets and bioreactors 16 filled with luteum rock or daphite pumice. The cultured corrosive microorganisms and microorganisms that have mutual symbiosis with these microorganisms are cultured and sent to the aeration tank 10 so that the entire system can grow the corrosive microorganisms and microorganisms which mutually coexist with these microorganisms. The organic matter in the wastewater is insoluble in water and converted to a nonvolatile corrosion precursor, which is then sent to the settling tank 12 for solid-liquid separation to remove organic pollutants in the wastewater, followed by oxidation It is a process of highly treating organic wastewater discharged after oxidizing and removing unremoved organic substances to tank 20.

Of particular note is that the treatment of organic pollutants in wastewater by the corrosive reaction is expected to be very effective because it has the advantage that the operation and facilities cost is low and odor generation is reduced while the advanced treatment is performed.

Description

Treatment method for organic wastewater

The present invention has its own oxidation function in organic wastewater, such as domestic sewage and sewage, while having its own oxidation function, catalytic function of oxidative deodorization, minerals supply function to animals and plants (including microorganisms), and organic materials are insoluble in water. Activated humic substances in the form of mineral complex salts of chelate-type peroxyfulvic acid, which have a catalytic function that promotes the corrosive reactions converted into non-volatile, stable macromolecular substances. Oxidation Reduction Potential (ORP) value by supplying oxidized water of luteum or Daecite Pumice and Oxidation tank 22 containing active minerals to culture tank 15 and collection tank 8 Is adjusted to +250 to + 350mV to supply the aeration tank 10 with microorganisms that are cultured to activate the corrosive microorganisms and microorganisms that are mutually symbiotic with each other, thereby adding organic pollutants in the wastewater. The present invention relates to a high-treatment of organic pollutants which are insoluble in water and converted to non-volatile corrosion precursors by the chlorination reaction, precipitated in the precipitation tank 12, and then decolorized and unremoved by oxidation.

As a wastewater treatment method using Bacillus sp. Mixed bacteria, there are Japanese Patent Publication Nos. 2001-321798, 2000-159589, Pyeong 10-258293, and Pyeong 9-169586. It is difficult to expect economical and efficient safe treatment because it is not a treatment process that accurately grasps the mechanism of treatment of organic pollutants in the wastewater and the physiological characteristics of microorganisms.

An object of the present invention is to use BOD, COD by using corrosive microorganisms in soils that produce corrosive substances by organic corrosion in organic wastewater such as domestic wastewater and sewage, and microorganisms having mutual symbiosis with these microorganisms. , TN, TP, etc. are economically and efficiently advanced.

1 is a pretreatment process diagram

2 is a biological process chart by the corrosion reaction

3 is an oxidation treatment process diagram

<Explanation of symbols for main parts of drawing>

1: Screen Screen 2: Settlement Site

3: Scraper 4: Reservoir

5: Reservoir Waste Water Transfer Pump (Pump) 6: Dehydrator

7: vibrating detail screen 8: sump

9: Septic waste water transfer pump 10: Aeration tank

11: contact material 12: sedimentation tank

13: Sedimentation tank scraper 14: Sedimentation sludge conveying pump

15: culture tank 16: bioreactor

17: Pellet Active Corrosive 18: Pumice

19: Air blower 20: Oxidation tank

21: oxidation tank stirrer 22: oxidation water transfer pump

23: final treatment tank

In the present invention, in order to economically and efficiently process organic wastewater such as domestic sewage and sewage, the growth environment conditions of the corrosive microorganisms and the microorganisms in mutual symbiosis with these microorganisms These microorganisms, which are cultivated to be activated by creating optimum environmental conditions that can become active while optimizing corrosion, are insoluble and insoluble in water as well as organic pollutants in wastewater, nitrogen, phosphorus and odor-causing substances. This is a process of converting volatile corrosion precursors into precipitates and removing them from oxidation and decolorizing and removing uncontaminated contaminants by oxidation. First, corrosion mechanisms that produce organic materials stably and efficiently produce corrosion materials. ) And types and characteristics of corrosive microorganisms and microorganisms having mutual symbiosis with these microorganisms In the following:

When organic substances are put into the soil, Actinomycetes such as Sorangium cellulosum, Actinomyces globioporus roseus, Aspergillus niger, Fungi such as Penicillium sp. Microorganisms such as Cephalosporium gordoni, Bacillus mycoides, and Bacillus luteus consume CO ₂ and H ₂ by ingesting breakdown organic substances such as starch, sugars, and simple proteins. Decompose into simple minerals such as O and excrete polyphenolic compounds as metabolites.

In addition, the polyphenolic compound generates hydrogen peroxide (H ₂ O ₂ ) as it is oxidized to a quinone compound by the catalytic action of oxygen and polyphenol oxidase contained in the corrosive material in the air.

Hydrogen peroxide (H ₂ O ₂ ) reacts with metal salts such as ferrous iron salt (FeSO ₄ ) present in the soil to form Free Hydroxyl Radical (OH ·).

^{_{H 2 O 2 + Fe 2+ --------}} → Fe 3+ + OH - + OH · ‥‥‥‥‥ ③

Puri hydroxyl groups react with organic acids such as Fulvic acid, which are formed during the corrosive reaction, to produce peroxides and then to produce oxidases.

Organic acid + OH · -------- → Peroxide ‥‥‥‥‥‥ ④

Peroxide + Enzyme -------- → Oxidase ‥‥‥‥‥ ⑤

Oxidases catalyze the oxidation of polyphenolic compounds to quinone compounds in the air.

The quinone compound undergoes a polycondensation reaction with cellulose, tannin, and lignin, which are difficult to be decomposed by microorganisms, to produce corrosives, which are insoluble and non-volatile, stable macromolecules.

Quinone compound + cellulose, tannin, lignin-→ corrosive precursor-→ corrosive ....... ⑥

Substances such as ammonia (NH ₃ ), hydrogen sulfide (H ₂ S), mercaptan, and volatile amines, which are odor generating substances, are immobilized to corrosive substances to reduce odor generation.

In addition, the corrosive precursor material is a chelate, which reacts with the minerals in the soil to produce corrosive mineral complexes. This corrosive mineral complex has a function of facilitating mineral supply to animals and plants.

In particular, in the case of wastewater treatment by the corrosion reaction, nitrogen compounds are immobilized to corrosive substances in the form of polypeptides and amino acids and removed as surplus sludge so that nitrogen compounds can be treated highly without aerobic and anaerobic manipulation. Can be.

In addition, among the microorganisms that are mutually symbiotic with the corrosive microorganisms, Acinetobacter sp., Also known as bio-phosphate, predominantly grows, and the phosphorus component in the wastewater is almost completely removed.

In order to improve the treatment efficiency of organic pollutants in wastewater by corrosion reaction, the following environmental conditions should be established.

1) Corrosive microorganisms and microorganisms that have mutual symbiosis with these microorganisms have high mineral content in cell membranes and cell nuclei, so they must be supplied with sufficient minerals for active metabolism, so sufficient minerals must be supplied in the system.

2) In order for corrosives to be produced by active corrosive reactions, the supply of oxidase must be smooth, and the metabolic activity of corrosive microorganisms and microorganisms that have mutual symbiosis with these microorganisms must be active.

These microorganisms must be supplied with oxidase and have an appropriate aerobic atmosphere because the corrosive reactions are promoted by active metabolism in an oxidative atmosphere with an ORP value of +250 to + 350mV.

3) Because the growth of corrosive microorganism is active at the weak acidity around 6, the pH should be maintained at 5.5 ~ 6.5.

4) The temperature is mesophilic microorganisms, and the growth of corrosive microorganisms is active at 25 ~ 35 ℃, but the resistance to low temperature and high temperature is stronger than that of microorganisms in general activated sludge.

In view of the above conditions, the present invention has been developed a treatment process that can be economically and efficiently highly advanced organic pollutants in the waste water by biological corrosive reaction, it will be described below with reference to the drawings.

In the case of highly concentrated organic wastewater, large solids in the inflow wastewater are removed from the crude wood screen (1), and foreign substances having a heavy gravity such as sand are removed from the sedimentation basin (2) by the sedimentation scraper (3) and then stored in the storage tank (4). Send to).

SS (suspended solid) in the waste water is removed by vibrating fine screen (7) or dehydrator (6) and then the filtrate is sent to the sump (8).

The wastewater of the collecting tank 8 is sent to the aeration tank 10, and the aeration tank 10 has microorganisms cultured with corrosive microorganisms and microorganisms having mutual symbiosis with these microorganisms in the return sludge and the culture tank 15 of the settling tank 12. Organic pollutants, nitrogen compounds, and phosphorus compounds in the wastewater are converted into corrosion precursors of the previous stages of insoluble and nonvolatile corrosive substances in water by biological corrosive reactions.

In the aeration tank (10), when organic pollutants, nitrogen, and phosphorus compounds in the waste water are converted into corrosion precursors that are insoluble in water by biological corrosion reactions, they are sent to the precipitation tank (12) to remove the corrosion precursors and microorganisms that exist in the solid state. After sedimentation and separation, the supernatant is sent to the oxidizing tank (20), and the precipitated sludge (corrosive precursor and microorganism) is returned to the crude screen (1), the sump (8) and the aeration tank (10), and the corrosive microorganisms and these microorganisms. It is also sent to the culture tank (15) for the activation and cultivation of microorganisms in mutual symbiosis.

In the culture tank 15, in order to cultivate the activated corrosive microorganisms and microorganisms that are mutually symbiotic with these microorganisms, the phylic acid mineral complex salt, oxidase, physiologically active substance of microorganism, Pellets (17) and active minerals containing a large amount of activated corrosive substances and growth minerals (Dacite) of active corrosive substances containing a large amount of growth accelerators, pathogenic microorganisms and antibiotics that inhibit the growth of rot and perishable microorganisms When air is supplied to the lower part of the bioreactor 16 filled with vaginal pumice 18, the culture medium and the air in the culture tank 15 are air-lifted, and the active corrosive material pellets filled in the bioreactor 16 are filled. Corrosive microorganisms and microorganisms having mutual symbiosis with these microorganisms by being supplied with minerals, oxidases, physiologically active substances, and other active enzymes while passing through the (17) and pumice (18) layers This enabled the metabolic activity of microorganisms are cultured.

In order to promote the corrosive reaction while the corrosive microorganisms are actively metabolizing, the redox potential (ORP) should be +250 to +350 mV. Therefore, when the air is aerated, the redox potential (ORP) is +250 mV or less. In this case, the oxidized water of the oxidizing tank 22 is returned to the collection tank 8 and the culture tank 15 to adjust the redox potential (ORP) value to +250 to +350 mV.

As described above, the culture medium cultured in the culture tank 15 is sent to the aeration tank 10 so that the whole system grows corrosive microorganisms in which organic substances are converted to corrosive substances and microorganisms having mutual symbiosis with these microorganisms grow. The organic environment pollutants, nitrogen and phosphorus compounds in the waste water are converted into corrosion precursors that are insoluble in water by biological erosion reactions and sent to the settling tank (12), and the wastewater treated by solid-liquid separation is oxidized tank (20). Send to.

The aeration tank 10 is provided with a contact material (carrier) 11 to improve processing efficiency.

In the oxidizing tank 20, an oxidizing agent (H ₂ O ₂ , NaClO, etc.) and ferrous salts (FeSO _4, etc.) are injected to remove organic substances and pigments which have not been removed, and are then sent to the final treatment tank 23 for discharge.

At this time, the adjustment of the redox potential (ORP) of the collection tank (8) and the culture tank (15) is adjusted to reduce the redox potential (ORP) value so that the corrosion reaction can occur smoothly by injecting the oxidation water of the oxidizing tank (20) Adjust to +250 to + 350mV.

The surplus sludge of the settling tank 12 is sent to a concentration tank, concentrated, and then sent to a dehydrator system for dehydration treatment.

As is apparent from the above description, in the present invention, when biological treatment and oxidative treatment of organic wastewater such as domestic sewage and sewage are performed by erosion reaction, odor generation is reduced and economically advanced treatment is possible. It is expected to be widespread in processing.

Claims (1)

The organic wastewater is injected into the sump (8) and equalized after the wastewater from which solid matter is first removed by the crude wood screen (1), the settling paper (2), the vibrating fine screen (7), or the dehydrator (6), and then the aeration tank (10). The organic material, nitrogen, phosphorus compounds and other contaminants in the wastewater are insoluble in water and insoluble in the waste water by the corrosive microorganisms cultured in the culture tank 15 and microorganisms having mutual symbiosis with these microorganisms. The sludge (corrosive precursors and microorganisms) that are insoluble in water are sent to the settling tank (12) after conversion to the volatile corrosive precursor material, and the treated water is removed from the settling tank (20) to the oxidizing agent (H ₂ O ₂ , NaClO, etc.). ) And ferrous salt (FeSO _4, etc.) to remove unremoved organic substances and pigments, sludge precipitated in the settling tank 12 is returned to the crude wood screen (1), water collection tank (8), aeration tank (10) , Some are sent to the culture tank (15), the activated culture microorganism aeration The surplus sludge which is sent to the tank 10 and discharged from the settling tank 12 is sent to the concentration tank and sent to the dehydrator system after concentration and dehydration treatment, and in the culture tank 15 to improve the treatment efficiency, the natural acid or artificially produced activity A bioreactor (16) filled with a corrosive pellet (17) and a luteum or dacite pumice (18) containing a large amount of active minerals was installed to supply air to the lower part of the bioreactor (16) to provide aeration. While supplying the oxidized water of the oxidizing tank 20 to the culture tank 15, the redox potential (ORP) value is +250 ~ + 350mV, and also the collection tank (8) so that the redox potential value +250 ~ + 350mV A method for advanced treatment of organic wastewater by supplying the oxidized water of the oxidizing tank 20 to cause an active corrosive reaction.