KR20050121306A - Food waste water processing apparatus used dissolved air flotation unit and biological chemical reacting - Google Patents

Abstract

The present invention pressurizes and dewaters high concentration wastewater generated from waste such as collected foods to desorb wastewater, and the wastewater is removed from the wastewater to a fermentation means for fermentation, and the desorbed wastewater is dehydrated and pressurized. The present invention relates to a desorption liquid and a high concentration wastewater treatment apparatus for a food waste containing a large amount of milk fat which can efficiently treat high concentration wastewater such as desorption liquid desorbed from the food waste by purifying.

The present invention transfers the desorption liquid desorbed from the contaminant remover (4) to the storage tank (9) to transfer the wastewater to the pressure flotation separator (15) through the pipe flocculator (14), and in the pressurized flotation separator (15). The sludge contained in the wastewater by flotation by flotation is separated, and the sludge and the wastewater separated by the pressure float separator 15 are sent to the sludge storage tank 33 and the biochemical reaction tank 21, respectively, and the pipe agglomerate 14 The flocculant dissolving means (11-1), admixture tank (11-2), neutralizer tank (11-3) is supplied to the water in sequence and is processed from the storage tank (9) is transferred to the pressure flotation separator (15) The waste water to be agglomerated in the pipe agglomerator 14, the biochemical reaction tank 21 to maintain a constant temperature by adding an oxidizing agent in the biochemical reaction tank 21 to induce a stable precipitation in the sedimentation tank 36, which is a waste water purification means While staying Then it is sent to the microbiology (25), MSR reaction tank 30, a settling tank 36 through the electrochemical reactor (32). The supernatant precipitated in the sedimentation tank 36 is discharged as clear water, and the sediment sludge generated at this time is dehydrated by a dehydrator 38 which is a dehydration means by storage mixing 33 and sludge generated in the pressure floatation separator 15. Separate and discharge the material.

Description

Food Waste Water Processing Apparatus Used Dissolved Air Flotation Unit and Biological Chemical Reacting}

The present invention is a high concentration wastewater (BOD 80,000 ~ 85,000) generated from waste such as collected food

ppm SS 50,000 ~ 60,000ppm) agglomerated, depressurized and dehydrated to remove the wastewater, and the wastewater is removed from the food solids to fermentation means for fermentation, and the desorbed wastewater is dehydrated and pressurized to carry out biochemical purification The present invention relates to a degreasing solution and a high concentration wastewater treatment apparatus for food waste containing a large amount of milk fat that can efficiently treat high concentration wastewater, such as a desorption solution desorbed from food waste through a process.

In general, food waste and various wastes cannot be disposed of as they are, so that the wastes can be separated and then incinerated or recycled, and the wastes can be dried and recycled as industrial resources. In particular, the food waste was made into a sludge state, and the collected food waste was stored in a silo to be sent to an incinerator or a drying furnace.

In addition, since the food waste contains a lot of moisture, only the method of drying and incinerating the food waste could not evaporate or treat all of the waste water contained in the food waste, and thus, the food waste generated from the food waste. The wastewater to be discharged as it is, there was a waste stage that worsens the pollution of the water by the wastewater discharged as it is generated.

In addition, when the food waste is landfilled as it is, wastewater generated from the food waste is infiltrated into the ground, which causes a problem of lighting that contaminates the land together with groundwater contamination by leachate.

The present invention has been devised in view of the above-mentioned conventional problems, and condenses and pressurizes and dehydrates high-density wastewater generated from wastes such as collected foods in this paper, and desorbs the wastewater. The dewatered wastewater is dehydrated, pressurized, and biochemically treated to be purified, thereby efficiently treating high-density wastewater, such as the desorption liquor desorbed from the food waste. It is intended to provide a desorption liquid and a high concentration wastewater treatment apparatus, which will be described in detail with reference to the accompanying drawings as follows.

The desorption liquid separated from the food waste is transferred from the debris remover (4) to the storage tank (9) to transfer the wastewater to the pressure flotation separator (15) through the pipe flocculator (14). The sludge contained in the wastewater by flotation by flotation is separated, and the sludge and the wastewater separated by the pressure float separator 15 are sent to the sludge storage tank 33 and the biochemical reaction tank 21, respectively, and the pipe agglomerate 14 The flocculant dissolving means (11-1), admixture tank (11-2), neutralizer tank (11-3) is supplied to the water in sequence and is processed from the storage tank (9) is transferred to the pressure flotation separator (15) The waste water to be agglomerated in the pipe agglomerator 14, the biochemical reaction tank 21 to maintain a constant temperature by adding an oxidizing agent in the biochemical reaction tank 21 to induce a stable precipitation in the sedimentation tank 36, which is a waste water purification means while doing After the retention, the microbial tank 25, the MSR reaction tank 30, and the electrochemical reactor 32 are transferred to the precipitation tank 36. The supernatant precipitated in the sedimentation tank 36 is discharged as clear water, and the sediment sludge generated at this time is dehydrated by a dehydrator 38 which is a dehydration means by storage mixing 33 and sludge generated in the pressure floatation separator 15. Separate and discharge the material.

Hereinafter will be described the working state of the present invention configured as described above.

The wastewater transported to the storage tank 9 is allowed to stay for a certain period of time to effect flow adjustment and equalization, and then to the pipe while passing through the pipe agglomerator 14 via the flowmeter 14-2 using the transfer pump 14-1. A certain amount of chemical is supplied to the line using the chemical pump 12 with the admixture 11-1, the neutralizing agent 11-2, and the flocculant 11-3. At this time, the reaction mixture is mixed with the pressurized water supplied from the pressurized water generator 15-1 of the pressurized float separator 15 to form a floc. At this time, the formed flock is separated into the upper and lower portions in the pressure flotation tank 15 to separate the water and the sludge.

Water separated from the pressure floatation separator (15) is transferred to the biochemical reaction tank (21) to maintain and react to a constant temperature, and injects a certain amount of air through the aeration device (25-2) to determine the reaction conditions of the optimum reaction. Make it. In this reaction, nutrients are decomposed and BOD substances are significantly reduced.

The raw water overflowed from the biochemical reactor 21 keeps nutrient decomposition of the main BOD material while continuing to give up in the microbial tank 25, and after a certain time, the reaction process is terminated and the transfer pump 27 and The chemicals for the reaction are introduced between the line mixers 27-1, and the chemicals in the tanks 10, 11-1 and 11-3 are transferred to the pump 29 and mixed with the line mixers 27-1. Into the MSR reactors (28, 30). After a predetermined time, the mixture is stirred with the stirrer 30-1 and then transferred to the next step. At this time, the colloidal particles undergo purification again. At this time, the treated water transferred to the settling tank 36 is purified and stored in the treating water tank 37, and when a predetermined amount is filled, the treated water is discharged to the discharge part 43-2 through the pump 43 and the flow meter 43-1. The discharged treated water is sent to the sewage treatment plant, and depending on the local circumstances, subsequent facilities may be further purified.

The sludge generated in the process is stored in the sludge reservoir tank 33, and dehydrated through the dehydrator 38, which is a dehydration means, is discharged through the discharge means 39 to the cake, and then converted into compost through a fermentation process and spread to farms.

As described above, the present invention separates waste and wastewater by coagulation, pressurization, flotation, and biochemical treatment of wastewater such as moisture contained in food waste as described above, and purifies the wastewater that is separated and detached and purified. The food waste from which moisture is desorbed can be fermented and recycled, thereby preventing environmental pollution caused by the food waste, and by purifying and discharging the waste water, the food waste leachate is infiltrated into the ground as it is. It is characterized by lighting that can prevent groundwater, water supply and sewage, and land from being contaminated.

Claims (1)

(a) separating the water and solids from the pressure flotation separator by sequentially mixing the waste water from food waste and the food waste desorbing liquid generated in the feed or composting process in a pipe agglomerate, and separating the water and the solid substance from the pressure flotation separator. , TP, etc. are removed, and the bottom sludge and scum sludge are sent to a sludge storage tank, and the treated water is reacted through a biochemical reaction apparatus by inputting chemicals and indirect heat to adjust the water quality suitable for biological treatment; (b) By using the anaerobic, aerobic, anaerobic, and precipitation steps by transferring the wastewater treated in the above to the aeration tank at the same time to remove nutrients and organic matter including colloidal substances, nitrogen, phosphorus and sludge A device configured to be sent to a sludge storage tank to make a dehydration cake, and the purified supernatant flows into a discharge tank and discharged in connection with a sewage terminal treatment facility.