KR960003922B1 - Waste water treatment by volcanic ashes - Google Patents

Abstract

The treating method of a nondegradable organic waste water is carried out by passing the waste water through the sand filter device(1) to remove a solid material, passing it through the flow control tank(2), transferring it to the aeration tank(3) equipped by the media packed tower(8), adding a microorganism-treated sludge to the waste water, biologically treating the mixture for 12˜15hrs, temporarily storing the treated supernatant in the storing tank(4), and treating it in the reserve osmosis system(5) to collect the concentrated solution for an organic liquid fertilizer. The media packed tower(8) is filled with porous silicastones and volcanic ashes.

Description

Treatment of Organic Wastewater Using Marine Silica and Volcanic Ore and Use of Final Concentrates

1 is a process chart of the present invention

2 is a detailed view of the median packing tower of the present invention

* Explanation of symbols for main parts of the drawings

1: Sand Filtration Device 2: Flow Adjustment Tank

3: aeration tank 4: storage tank

5: R.O system (reverse osmosis concentrator) 6: concentrated water storage tank

7: pump 8: media filling tower

9: body 10: upper mesh

11: lower body 12: support

13: volcanic ash ore 14: SiO ₃ ^-2 silica

The present invention relates to a method for rapidly treating hardly decomposable organic wastewater using marine silica and volcanic ash ore, and more specifically, a small amount of sludge from microbial treatment is added as a source of NSiO _3- ^{. 2} to 65% or more containing, marine silica and ash minerals to the media livestock excrement, such as (media) donnyo by a packed column in maritime silica structure and pumice in a porous of a porous is charged to be processed efficiently in a short time It relates to a method for treating organic wastewater using.

Conventionally, as a method of treating manure and other organic sewage of livestock, which occupy a large proportion as an environmental pollutant, digestive treatment by anaerobic bacteria has been used in a closed tank. However, the anaerobic treatment method is not only difficult to maintain the optimum state of the reaction due to the large number of variable factors, but also takes 7-12 days to process, so the treatment efficiency is extremely low and the untreated discharged state is frequent, thereby contaminating the environment. Resulted.

In addition, since the recovery of money in the waste can be used as a good organic fertilizer, such as compost, it is necessary to recover the money separately before wastewater treatment, and mainly to treat only the urine. It has been.

In contrast, another conventional method is a standard activated sludge method, which is an enzymatic digestion reaction using aerobic bacteria and permeable anaerobic bacteria. There have been disadvantages such as taking a supplement and injecting spawn from time to time.

In addition, recently, in Japan and the like developed a patented aeration treatment apparatus using a conventional ceramic granular material as a sewage treatment method such as pig urine, the treatment period is more than 10 days, in practice more As it takes time, facilities and capacity should be enlarged, and facility and operation expenses are increased accordingly, while treatment efficiency is not enough, and it is not suitable for the Korean situation.

The present invention is to solve this problem in the prior art, the following requirements are required to constitute the present invention.

1) There must be a house for germs to live best.

2) Create an environment for bacterial growth.

3) Find the best microbial species among frozen, wastewater, and edible bacteria.

Thus, the inventors have found that silica containing 65% or more of SiO ₃ ^-2 has ion exchange capacity, which can generate minerals and finally clean oxygen. It is thought to provide a better environment for aerobic microorganisms.

In addition, it was noted that the volcanic ash ore was porous, which provided a house where bacteria could grow and multiply.In order to provide conditions for inhabiting not only as a sludge source but also in wastewater, microorganisms were processed during the processing of fish or meat. Small amounts were added to the organic wastewater to be treated for sludge to meet this requirement.

Therefore, the present invention has a surface area of 250㎡ per 1g containing a small amount of sludge treated as microorganisms as raw material and containing 65% or more of SiO ₃ ^-2 as a source of microbial sludge. Porous marine siliceous structures and porous volcanic ore, for example pumice-filled towers, are installed and treated in the aeration tank to reduce facility and operating costs, while requiring only 12-15 hours of treatment time. It provides a method for treating organic wastewater suitable for the situation in Korea, which can be reduced to about 1/10.

The present invention as described above will be described in detail according to the processing procedure according to the accompanying drawings.

1) Pretreatment of organic wastewater such as pig urine

The collected organic wastewater is temporarily stored in a storage tank 2 for removing solids in the wastewater and adjusting the flow rate via the sand filtration device 1.

2) biological treatment in the aeration tank 3;

Aeration tanks equipped with median packing towers 8 and aeration facilities filled with porous marine silica (14) and porous pumice (13) containing not less than 65% SiO ₃ ^-2 and having a surface area of not less than 250 m ^{2 /} g. 3) Into the organic wastewater to be treated from the storage tank (2) and by adding an appropriate amount as sludge treated with microorganisms sludge generated during fish processing or meat processing to enable active growth of aerobic bacteria.

Marine siliceous used in the present invention is produced as an ion exchange material in the sedimentary deposits of the mesozoic zone, has the characteristic of forming an essential mineral in the water and release a large amount of oxygen. While conventional silica contains SiO ₃ ^-2 , it is characterized by the formation of Si ₃ O ₉ and Si ₆ O ₁₈ , which is porous silica containing 65% or more of SiO ₃ ^-2 , and 250m / g Are those having a surface area of. Therefore, the surface area is wide, it is easy to form aerobic microorganisms.

Thus, the marine silica used in the present invention is represented by the following structural formula (I).

The nature of these marine silica is that the free access of the electron chemically has a high ion exchange rate, excellent oxidation and reduction capacity, excellent aerobic microorganisms and the ability to cultivate the decomposition of organic matter can proceed quickly.

In addition, since it has a large surface area of 250㎡ per 1g it is possible to inhabit a lot of produced microorganisms.

Table 1 below shows the analysis table for the porous marine silica used in the present invention.

TABLE 1

As can be seen from the above table, it is understood that the marine silica used in the present invention contains 65% or more of SiO ₃ , unlike the ceramic containing SiO ₂ in general.

In addition, in the present invention, for example, by using a porous volcanic ore such as pumice, it provides a habitat for oxygen and proliferated microorganisms required for biological treatment of organic wastewater to maximize the treatment efficiency.

Referring to the accompanying drawings (FIG. 2), a median filling tower 8 made of SiO ₃ ^-2 marine silica and porous volcanic ore according to the present invention will be described.

The upper portion 10 and the lower portion 11 of the cylindrical body 9 are made of meshes such as stainless steel, and three supports 12 are installed on the body 9 so as to be erected under the aeration tank 3. . Inside the body (9) has a SiO ₃ ^-2 structural stone at the bottom of the body It fills as much as it fills the ash ore.

As described above, the organic wastewater to treat the tower 8 filled with volcanic ash ore, such as porous marine silica and pumice, containing 65% or more of SiO ₃ ^-2 according to the present invention and having a surface area of 250 m ^{2 /} g. When the wastewater is treated by immersing it in a filled aeration tank, the treated water discharged is treated in a state of being less than BOD 10 and less than COD 20 in terms of hygiene (typically 100 or less in the culture experiment of E. coli bacteria). At the same time, it exhibits excellent antibacterial properties. In addition, a lot of oxygen is generated, anaerobic microorganisms are gradually extinguished, and aerobic beneficial microorganisms proliferate, so that the treated water becomes a water that does not rot well due to the increase of sterilization action by various minerals.

3) post-treatment

The supernatant liquid that forms most of the biologically treated treatment liquid in the aeration tank 3 is transferred to the storage tank 4 for temporary storage and then put into the R.O system (reverse osmosis concentrator) 5.

In this system 5, the treated water passed through the reverse osmosis process is discharged, and the concentrated liquid collected in the system 5 is used as a liquid fertilizer.

Table 2 shows the results of requesting the analysis of the concentrate to the Hanku Chemical Testing Laboratory.

TABLE 2

As can be seen from the results of the above table, it can be seen that the concentrate is very suitable as a liquid fertilizer in addition to the treated water obtained by treatment according to the present invention.

The results are listed in Table 3 below, comparing the treatment method of the present invention as described above with the standard activated sludge method.

TABLE 3

As described above, according to the organic wastewater treatment method of the present invention, 1) the treatment time is surprisingly shortened to 12-15 hours, while the treatment efficiency is high, the throughput can be maximized without requiring a large storage tank, and 2) the surplus Due to the extremely low generation of sludge, the cost of dewatering and taking out the sludge is reduced, and 3) the labor cost is reduced because the facility is simple and no mechanical operation is required. 4) In addition, the facility or structure used in the existing activated sludge process It has advantages that can be put into practical use even with a slight change.

5) On the other hand, almost no odor is generated from sludge as well as treated water, and well-treated sludge feels soil odor and there is little odor due to the generation of organic acids or emulsions even when left in an anaerobic state for a long time. This is because it is possible to remove odor 100% by vigorous digestive power by microorganisms as a result of using marine silica and volcanic ash ore according to the present invention.

Claims (2)

Organic wastewater is passed through a sand filtration apparatus 1 to remove solids in the wastewater, and then, via a flow control tank 2, porous marine silicate containing 65% or more of SiO ₃ ^-2 and having a surface area of 250 m 2 per gram. And a small amount added to the organic wastewater as sludge as a sludge which is transferred to the aeration tank 3 in which the median filling tower 8 filled with porous volcanic ore such as pumice is installed, and the microbial treatment of sludge generated during fish processing. After the biological treatment within 12-15 hours, the supernatant of the treatment liquid is temporarily stored in the storage tank 4, and then put into the RO system 5 to obtain the final treated water and concentrate by reverse osmosis process. Treatment of Organic Wastewater Using Silica and Volcanic Ore. The use of the final concentrate produced by the treatment method according to claim 1 as an organic liquid fertilizer.