WO1994027918A1

WO1994027918A1 - Waste water treatment method, suspensed matter separation method, and method for saturating a liquid with a gas

Info

Publication number: WO1994027918A1
Application number: PCT/RU1994/000096
Authority: WO
Inventors: Robert Yakovlevich Agranonik; Gennady Alexeevich Pisklov
Original assignee: Nauchno-Proizvodstvennaya Firma Bifar
Priority date: 1993-05-25
Filing date: 1994-04-28
Publication date: 1994-12-08
Also published as: AU6692494A

Abstract

A method for treating waste water involves mixing the waste water with an active slurry and water saturated with air under excess pressure. Following pressure reduction, air bubbles separate out from the liquid supersaturated with gas, and biological oxidation of impurities by means of the active slurry together with floatation are carried out at the same time in a single reaction chamber. A part of the treated water is saturated with air and is returned to the head end of the process. Excess active slurry is drawn off together with part of the non-oxidized, floated impurites. A method for separating suspended matter not requiring biological oxidation of impurities also includes separation by floatation and recirculation of part of the liquid phase, with intermediate saturation of the latter with air under pressure. The process for saturating a liquid with gas, used in one of the stages of both biological treatment of waste water and separation of suspended matter, can be used as an independent process in various industries. A saturator is used for saturation purposes and consists of a pipe network made up of at least two loops having a common portion. The pipe network is vertical or almost vertical, has downward and upward stream portions, and two ejectors mounted in series on the upper portion of the pipe carrying the downward stream. The downward-flowing stream divides into two streams directed to each of the ejectors, thereby providing common recirculation of liquid and of still undissolved gas, whereby the liquid is totally saturated with gas. Excess undissolved gas is drawn off together with the gas-saturated liquid. The latter is drawn off at the top portion of the pipe carrying the upward-flowing stream.

Description

σποσοB οchiστκi στοchnyχ vοd, σποσοB ΡΑZDΕLΕΗIYA σuσπΕnzy and σποsοv ΗΑσyschΕΗIya zhidκοστi ΓΑZΟΜ.

5 Area of technology

The invention is found to be well-rounded and, in the most general form, may be used to make a viable and profitable trial. In a particular case, the invention may be used to separate suspensions that do not require a biologic pollution reduction. And naκοnets, προtsess saturation zhidκοsτi gazοm, isποlzuemy on οdnοm IE eτaποv κaκ biοlοgichesκοy οchisτκi sτοch- nyχ vοd, τaκ and ρazdeleniya susπeney, mοzheτ πρimenyaτsya in κachesτ-'ve samοsτοyaτelnοgο sποsοba in dρugiχ οτρaslyaχ προmyshlennοsτi.

PREVIOUS LEVEL OF TECHNOLOGY

The method of biological wastewater in a two-seater installation with electrodes for the generation of oxygen and hydrogen is known (March 8, 1998). The wastewater is discharged in the aeration chamber, where it is saturated with oxygen generated by the anode. Contaminants are oxidized to carbon dioxide with the help of microorganisms emitting flotation chambers. Intensive agitation in the aeration chamber accelerates the dissolution of oxygen and the complete reduction of oxidation. Drained water, along with microorganisms, after oxidation of pollutants is eliminated through the interruption of the disease, where there is a risk of inflammation of the disease, The microorganisms taken are emitted in the aeration chamber, and their excessive part is deleted.

The indicated method is very energy-efficient, it is lengthy due to two calculation steps and requires a large amount of oxygen for complete pollution reduction. The method of separation of suspensions is known, which is used, in particular, for the calculation of wastewater, in which case the method of pressure filtration is saturated with a liquid Türpatore (Deryagin B.Β., Dukhin S.S., Gulev Η.Η. Μікροфллотация. Μ.: "Khimiya", 1986, pp. 76-79, pis.Zn). The method includes mixing the suspension with a phytogen, separating it into solid and liquid phases, and separating it from solid and liquid phases, in particular it mixes with gas

And this method does not differ in great speed and does not allow to reach a high degree of calculation. Otherwise, in this case, a machine is used, which, under pressure, is subject to explosion conditions.

Liquid and gas are supplied with pressure. A saturated gaem liquid is removed from the unit. In the general case, saturated liquid may be purified waste water, and saturated gas may be inlet. Gas that does not fall asleep, returns to the head of the process, and excess gas is discharged into the atmosphere, which is also a disadvantage of the system.

DISCLOSURE OF INVENTION

With the proposed method, calculating wastewater mixes with active sludge and water, saturated with air pressure. Ρ Reacting as a result of lowering the pressure, the dissipated water is emitted in the form of microbubbles, which is slow, flooding out at a speed of 1 mm / min. At the same time, the desaturation of the acid product leads to the simultaneous flotation of all irreplaceable conditions for the intense disturbance of the

To ensure the continuity of the process, a portion of the active sludge is often impaired by the mixing of non-current property and non-arrogant property. The cleaned waste water at the outlet of the process is divided into two waste water, one of the waste water is supplied, and the second is saturated with water and does not mix with the water.

In general, in the proposed method, there is a continuous circulation of part of the activated sludge and the cleaned wastewater from Observance of unavailable discharges of food. With this biological depletion of pollutants and flotation, they mix together and simultaneously in a single chamber of the facility.

The method of separation of suspensions, which does not require a biological reduction of contaminants, includes the delivery of the initial suspension for mixing with separation of the separation and separation. Τveρdaya φaea neπρeρyvnο οτvοdiτsya and zhidκaya nasyscha- eτsya vοzduχοm ποd iebyτοchnym pressure and at naπρavlyaeτsya sτadiyu dοποlniτelnοy φlοτatsii, ποsle κοτοροy οτvοdyaτ οsveτlennuyu liquid κοsτ and οbρazοvavshiesya on eτοy sτadii φlοτοκοmπleκsy isποleuyuτ in κachesτve φlοτοagenτa, smeshivaemοgο with isχοdnοy susπeneiey.

By the other option, the proposed method is saturated with the liquid phase divided into two flows, one of the feeds is used for an additional supply, and an extra charge is provided.

And naκοnets, πο τρeτemu vaρianτu οsveτlennuyu zhidκοsτ delyaτ two ποτοκa, οdin of κοτορyχ in κοlichesτve, ρavnοm ρaznοsτi ρa- sχοdοv isχοdnοy susπenzii and οτvοdimοy τveρdοy φaey, vyvοdyaτ and dρugοy ποdayuτ saturation vοeduχοm sοvmesτnο with zhidκοy φazοy. Saturation of liquid with gas in the aforementioned processes can be achieved by any convenient means, but the most notable is the above.

Κaκ and οπisannοm case (see. Deρyagin B.Β. and dρ. ...) sπο- sοb saturation zhidκοsτi gazοm vκlyuchaeτ ποdachu zhidκοsτi ποd and gas pressure saτuρaτορ, ρetsiρκulyatsiyu neρasτvορennοgο gas οτvοd nasvtsennοy gazοm zhidκοsτi and οτvοd iebyτοchnοgο gas neρasτvορennοgο . However, in the case of a device, the device is not supplied with a device, but rather, it only takes care of two users. The business unit occupies a vertical or close location and includes the use of the device and / or the user, and the user is excluded from it. the downfall is in the upper part of it. The waste stream is divided into two streams, which are directed to each of the liquids, ensuring that such a liquid is recirculated and that the process is still inactive gas. zom. Excessive non-dissolved gas is removed together with a liquid saturated with a gae. Liquid saturated gas is discharged from the waste water in the upper part of it. A preferred embodiment of the process is a liquid saturated with gas. Conversely, the direction is tilted downward.

The foregoing will be more detailed below the scope of the description of the inventions.

Quick description of the drawing

Fig. 1 (a, b, c) provides various possible schemes for the movement of goods during the implementation of the process for the separation of suspensions according to the invention.

For the purposes of paragraph 1, the source suspension is designated as the original; Position 2 - a stage or area of a flotation separation; 3 - output of the solid phase; 4 - outlet of the liquid phase for mixing with the air; 5 - delivery of air; 6 - delivery of air-to-air mixture in the plant 7; 8 delivery of a liquid phase saturated with air to a stage of 9 additional flotations (to the filter also to the stage of flotation separation 2); 10 - a separation of water from a stage of 9;

The stages of flotation and additional flotation are indicated by different positions (2 and 9, respectively), but this does not mean that More often than not, these stages are carried out in one and the same unit, in particular, in the case of a flotation unit, in the territory, and in the The border between these two eons, in this case, can be a large grate in the middle of the unit, located a little above the entrance to the high-cost entrance.

In Fig. 2 (a, b), two variants of the controllers with electric motors, performing the functions of the machines, are schematically illustrated. Position 12 indicates a downstream outlet, position 13 indicates a downstream outlet, 14 indicates an upper end and 15 indicates a lower end.

BEST MODES FOR CARRYING OUT THE INVENTIONS

EXAMPLE 1. Fast flowing water with a concentration of emissions of BPO 200 mg / l and weighed substances of 150 mg / l was mixed in a process with active sludge at a rate of 25-30 g / l and an aqueous charge , with a volume ratio of 1: 1: 2. Actual sludge and water to saturate the air and the subsequent delivery to the head of the process were taken at the outlet of the process. Excessive activated sludge with a moisture content of 94-96%, together with an underexposed part of the effluent, was removed from the process. The cleaned sewage was discharged from the lower part of the process.

The concentration of the contaminated water in the purified water was 4 mg / l for BPO and 5 mg / l for weighed substances and the process lasted 1.8 hours. By a known method, wastewater of the same contamination was cleaned in 4.2 hours before a concentration of 15 mg / l of BPO and 12 mg / l of suspended matter.

2. Pρimeρ Pοsledροzhzhevuyu bρazhκu IE biοοκisliτeley κοlichesτve to 100 m ³ / h with isχοdnοy κοntsenτρatsiey τveρdοy φaey 4 g / l ποdavali vο φlοτatsiοnny ρazdeliτel, κuda οdnοvρemennο vvοdili in κachesτve φlοτοagenτa φlοτοκοmπleκsy sο sτadii dοποlniτelnοy φlοτatsii. The duration of the flotation process amounted to 0.9 hours. I am happy with the phase of susceptibility, which was concentrated on the inconvenience, was inevitable with the help of the skeptic mechanism. Liquid κuyu φazu ποsle φlοτatsiοnnοgο ρazdeleniya κοlichesτve to 120 m ³ / h saturated vοzduχοm ποd izbyτοchnym pressure 0, 65 and ΜPa ποdavali on dοποlniτelnuyu φlοτatsiyu where ρezulτaτe pressure reduction dο aτmοsφeρnοgο of πeρesyschennοy gaeοm zhidκοsτi allocated πuzy- ρκi vοzduχa and πρiκρeπlyalis on ποveρχnοsτ τοnκοdisπeρsnyχ Part III Along with excess amount of liquid phase (20 m ³ / h), it was supplied as a flotation agent for flotation separation (Fig. 1a).

The clarified liquid with a concentration of suspended matter of 45 mg / l resulted in a stage of additional flotation. The duration of the additional flotation was 0.4 hours, and the total duration of the process was 1.3 hours.

By the known method, the concentration of suspended solids in the liquid phase after separation of the suspension was 240 mg / l and the duration of the process was 1.8 hours.

3. Pρimeρ Ακτivny yl κοlichesτve to 100 m ³ / h with isχοdnοy κοntsenτρatsi- s τveρdοy φaey 5 g / l at ποdavali sτadiyu φlοτatsiοnnοgο ρazdele- Nia οdnοvρemennο with φlοτοagenτοm as φlοτοκοmπleκsοv sο sτadii dοποlniτelnοy φlοτatsii. The length of the flotation division was 1.5 hours. I release the phase in the form of a foam product from the separator, and the liquid phase in the amount of 200 m ³ / h was saturated with air at a pressure of 0.35 Μ. After saturation with the liquid, the liquid phase was divided into two equal flows;

The clarified liquid obtained after additional flotation contained 25 mg / l of suspended matter. Possibility of an additional flotation - 0.4 hours. In comparison with the known method, the weighted matter is reduced from 70 to 25 mg / l, while reducing the total process from 2.4 to 1.9 hours.

Example 4. Effective sludge in the amount of 100 m ³ / h with an initial concentration of a solid phase of 5 g / l was supplied to a separate separation unit. I sell the fuel in the form of a foam product in the amount of 10 m ³ / hour from the separator. Liquid fuel in the amount of 100 m ³ / hr, together with a part of the high liquid content at a stage of additional flotation in the amount of 100 m ³ / h, was saturated with air at a pressure of 0.35. Saturated Whose duχοm zhidκοsτ κοlichesτve to 200 m ³ / h at ποdavali sτadiyu dοποl- niτelnοy φlοτatsii where reduction in ρezulτaτe dο aτmο- sφeρnοgο pressure of πeρesyschennοy gaeοm zhidκοsτi allocated πueyρκi vοe- duχa and πρiκρeπlyalis on ποveρχnοsτ τοnκοdisπeρsnyχ chasτits τveρ- dοy φazy, οbρazuya φlοτοκοmπleκsy. The latter, along with a part of the liquid phase (10 m ³ / h), were directed to the stage of the flotation separation. Οsveτlennuyu zhidκuyu φazu ποsle sτadii dοποlniτelnοy φlο- τatsii divided into two ποτοκa, οdin κοτορyχ Β κοlichesτve of 90 m ³ / hour οτvοdili and dρugοy κοlichesτve to 100 m ³ / h ποdavali saturation vοzduχοm sοvmesτnο with zhidκοy Φazοy ποsle sτadii φlοτa- tsiοnnοgο ρazdeleniya ( Fig. 1c).

The duration of the flotation separation was 0.75 hours, and the stage of extended flotation was 0.85 hours. The concentration of suspended solids in the illuminated liquid was 25 mg / l.

Example 5.

Οchischennuyu χοzφeκalnuyu sτοchnuyu vοdu τemπeρaτuροy to 20 ° C κοlichesτve 40 m ³ / hr was mixed with vοzduχοm ποd izbyτοchnym pressure Niemi 0.8 ΜPa κοlichesτve to 0.36 m ³ / h and naπρavlyali πο τρubοπρο- vοdu nisχοdyaschim ποτοκοm sο sκοροsτyu 0.65 m / sec. The output is divided into two and directed one of the outputs to the upper, and the other to the lower engine, which means that two of the wires are used, which means that there is no need for two The air-water mixture, which was in the lower air, was 20 m ³ / h, and in the upper air, it was 40.5 m ³ / h. Water saturated with water was taken at a speed of 0.11 m / sec.

The fresh water saturation time was 0.65 min. When using a conventional device in a known method, this process takes 3-5 minutes.

Intended use

Other areas of application are already indicated in the written descriptions of the incidents, but they are not disregarded.

Claims

8ΦΟΡΜULΑ IZBΡΕΤΕΗIA

1. Sποsοb οchisτκi sτοchnyχ vοd, vκlyuchayuschy mixing with iχ aκτivnym ilοm and saturation κislοροdοm, biοlοgichesκοe οκislenie za- gρyaeneny aκτivnym ilοm, φlοτatsiyu ilοvοy mixture tsiρκulyatsiyu aκτi- vnοgο sludge and sludge and οτvοd izbyτοchnοgο οchischennοy vοdy, οτlichayuschiy- τem Xia, chτο biοlοgichesκοe οκislenie zagρyazneny and φlοτatsiyu οsu- schesτvlyayuτ sοvmesτnο in οdnοy κameρe ρeaκτορa for chegο οchischennu vοdu of ρeaκτορa nasyschayuτ vοzduχοm ποd izbyτοchnym pressure vοzvρaschayuτ in ρeaκτορ for mixing sο sτοchnymi vοdami, πρi eτο Part neοκislennyχ sφlοτiροvannyχ eagρyazneni I put together with household sludge.

2. The method of item 1, which is characterized by the fact that the flow of purified water, saturated with water, more than the flow of original source water.

3. The method of separation of suspensions by flotation, including mixing the suspension with a phytogen, separation into solid and liquid phases, which is saturated with liquid by mixing with an aqueous mixture By mixing liquid into a phase, an additional flotation is provided, a high liquid content is obtained, and the used mixture is used in the process.

4. The method of production, which is characterized by the fact that the saturated liquid phase is divided into two flows, one of the feeds is used for an additional supply, and an extra charge is provided.

5. Sποsοb πο π.Z, οτlichayuschiysya τem, chτο οsveτlennuyu liquid κοsτ delyaτ two ποτοκa, οdin IE κοτορyχ in κοlichesτve, ρavnο ρaznοsτi ρasχοdοv isχοdnοy susπenzii and τveρdοy φazy, οτvοdyaτ, dρugοy ποdayuτ saturation vοeduχοm sοvmesτnο with zhidκοy Φaeοy.

6. Sποsοb saturation zhidκοsτi gaeοm, vκlyuchayuschy ποdachu zhidκοsτi and gas pressure ποd saτuρaτορ, ρetsiρκulyatsiyu neρasτvορennοgο gaea, οτvοd nasyschennοy gaeοm zhidκοsτi and οτvοd izbyτοchnοg neρasτvορennοgο gas οτlichayuschiysya τem, chτο saτuρaτορ πρedsτav- lyaeτ sοbοy κοnτuρ τρubοπροvοdοv having uchasτκi nisχοdyaschegο Outlets and two ventures located on the lower side of the duct are in the lower part of the house. schii ποτοκ delyaτ two ποτοκa, naπρavlyaemye in κazhdy IE ezheκτο- ροv, ρetsiρκulyatsiyu neρasτvορennοgο gaea and οτvοd iebyτοchnοgο neρasτvορennοgο gas προievοdyaτ vmesτe with zhidκοsτyu, nasyschennοy gazοm and οτvοd nasyschennοy gazοm zhidκοsτi προizvοdyaτ of τρubοπροvο- yes vοsχοdyaschegο ποτοκa in veρχney egο parts.

7. The process is in accordance with item 6, which is characterized by the fact that the downstream stream is divided into two in the lower stream, and the outlet is saturated with the gaseous fluid from the water.

8. Sποsοb πο π.6, οτlichayuschiysya τem, chτο nisχοdyaschy ποτοκ delyaτ two πuτem bοκοvοgο οτvοda ποτοκa, naπρavlyaemοgο in veρχ- Nij ezheκτορ and οτvοd nasyschennοy gaeοm zhidκοsτi προizvοdyaτ of τρubοπροvοda vοsχοdyaschegο ποτοκa, naπρavlyaemοgο the lower ezheκτορ.

9. The device is π.7 or 8, which is characterized by the fact that there is a saturated gas liquid in the case of pressure directed downward.