CN101870538B - Purification method and purification system of kitchen waste water - Google Patents

Purification method and purification system of kitchen waste water Download PDF

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Publication number
CN101870538B
CN101870538B CN2009100686091A CN200910068609A CN101870538B CN 101870538 B CN101870538 B CN 101870538B CN 2009100686091 A CN2009100686091 A CN 2009100686091A CN 200910068609 A CN200910068609 A CN 200910068609A CN 101870538 B CN101870538 B CN 101870538B
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waste water
water
groove
treatment
air flotation
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CN101870538A (en
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刘闽男
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TIANJIN RUNTONGQING TECHNOLOGY DEVELOPMENT Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a purification method and purification system of kitchen waste water. A discharge standard can be achieved by the purification treatment of the invention which has a stable process. The purification method comprises the following steps of: filtering kitchen waste water to remove suspended substances in the kitchen waste water, and then, separating oil-based substances from water-based substances; carrying out primary jet pressurization gas flotation treatment for 1.5-3 hours on the waste water after separation, filtering the waste water subjected to the primary jet pressurization gas flotation treatment by an overflow sand filter to remove floating slag and floating oil in the waste water, and then, removing precipitates by adopting a precipitation method; conveying the waste water into a pH value regulating tank to regulate the pH value to enable the water quality to meet requirements of biological treatment; conveying the waste water into an intermediate precipitation tank to precipitate the suspended substances in the waste water; then, carrying out aerobic treatment by adopting a biological rotating disk; and adding coagulants into the waste water after biological treatment for carrying out secondary jet pressurization gas flotation treatment, precipitating, removing the precipitates in the water, and discharging the waste water when the detection result shows that the discharge standard is achieved.

Description

The purifying method of kitchen waste water and purification system
Technical field
The present invention relates to a kind of purifying method and purification system of kitchen waste water.
Background technology
The wastewater source in meal kitchen is very extensive, comprises food-processing.Wherein: flesh of fish class, Poultry and Eggs, fruit and vegetable, dairy products, cereal, bean product etc. are of a great variety, and the water quality of the waste water of discharge is widely different, and principal pollutant have:
1. swim in the solid matter in the waste water, for example: tealeaves, pericarp, fish scale, meat mincing etc.;
2. be suspended in grease in the waste water, protein, starch, colloid thing etc.;
3. be dissolved in grease in the waste water, protein, starch, colloid thing etc.;
4. the silt that carries from raw material etc.;
5. the pathogenic bacterium that possibly exist etc.;
6. butchering the added-time contains a large amount of blood stains, clot, hair fiber, does not digest foodstuff, ight soil etc.
The waste water on waste water, cleaning equipment and the ground of these waste water, washing material etc. from plant-animal, plant processing, since employed raw material, the difference of product processing technique, and its Pollutant levels differ greatly.Be characterized in:
1. wastewater flow rate is big, though can toxic pollutant, organism, suspension content is high.
2. be prone to corruptly, make the receiving water body eutrophication, cause algae etc. to grow breeding in a large number, consume the dissolved oxygen in the water body rapidly.Water hypoxia makes aquatic animals and plants death by suffocation, also can impel the anaerobic digestion of water-bed organic substance.
3. the generation foul smell worsens water quality, influences the use value of water body
4. water surface grease adrift, suspension materials etc. destroy view, and are very sincere to causing courses of infection, the harm people, animal, etc. farming, animal husbandry and fishery.
Because the waste water in meal kitchen has every batch of uncertainty, contains things such as a large amount of blood stains, organism, grease, hair fiber, interior bits, meat bits, internal organ in the waste water, and the ight soil of indigested foodstuff and animal, with making us the uncomfortable bloody stink of feeling sick.Contain a large amount of intestinal bacteria and assorted bacterium in addition in these waste water, also have pathogenic bacterias such as anthrax-bacilus sometimes, variation water quality is bigger.General physical and chemical index is:
PH value: 5.0-7.5;
BOD5:250-2000mg/L;
COD:750-3000mg/L;
Suspended substance: 500-3000mg/L;
Grease: 220-1100mg/L;
Total solids: 1700-4000mg/L.
At present, the waste water in meal kitchen discharges through handling directly, if nutritive substances such as this nitrogenous, phosphorus enter water body; Then can make water body too fertile; Cause the nutrient laden phenomenon of water body, the hydrobiont in waters is caused extremely serious harm, destroyed human water body resource of depending on for existence.
Summary of the invention
The present invention is for a kind of method and the purification system that can carry out purifying treatment to kitchen waste water is provided, through can reaching emission standard after the purifying treatment of the present invention, and process stabilizing.
The present invention realizes through following technical proposals:
A kind of purifying method of kitchen waste water is characterized in that, comprises the steps:
(1) kitchen waste water is through filtering to remove suspended substance wherein, afterwards, carries out separating of oil material and aqueous substance, and reclaims oil material;
(2) waste water after the separation carries out one-level jet pressurized air flotation processing 1.5-3 hour; The process that said jet pressurized air flotation is handled is: with going out tiny, uniform bubble through a plurality of nozzle ejection after the air pressurized; Make and be difficult to settled solid particulate or tiny elaioleucite hydrophobicity by the surface; Stick on the bubble, borrow bubble floating power to take the water surface to, form scum silica frost and oil slick; Waste water after the pressurized air flotation of one-level jet is handled is delivered in the water leg after filtering out scum silica frost and oil slick wherein through the overflow sand-bed filter, and the employing precipitator method are removed throw out;
(3) waste water after step (2) is handled is delivered in the acid-alkali accommodation groove, detects the pH value of waste water, if pH value<6; Then add alkali and be adjusted to 6≤pH value≤7; If pH value>9 then add acid and are adjusted to 7≤pH value≤9, fully stir; Make grease, protein, starch, colloidalmaterial dissolving in the waste water, the needs that make water quality be suitable for carrying out a biological disposal upon;
(4) waste water after step (3) is handled is sent into the intermediate sedimentation groove, makes the suspended substance in the waste water be able to deposition; Afterwards, adopt blodisc to carry out aerobic treatment, remove most of dissolved organic matter in the water, aeration rate is 2-3mg/L, and the treatment time is 1-1.5h;
(5) add coagulating agent in the waste water after the biological treatment and carry out secondary jet pressurized air flotation processing 1.5-3 hour; The process that said jet pressurized air flotation is handled is: with going out tiny, uniform bubble through a plurality of nozzle ejection after the air pressurized; Make to be difficult to settled solid particulate or tiny elaioleucite combines with coagulating agent, form and be easy to sedimentary material; Wastewater sedimentation after the secondary jet pressurized air flotation is handled removes the throw out in the water, and the colourity of waste water is reduced, and discharges after detection reaches emission standard.
Said coagulating agent is solid polyaluminium chloride or polymer coagulant aids, and the consumption of coagulating agent is the 0.1-0.2% of mud dry weight by weight percentage.
Collect the throw out that produces in each step, put into collection surface, add flocculation agent; Carry out processed afterwards; Solid matter after the dehydration obtains the dewatered sludge feed through after the drying treatment, and the gas that produces in the drying process uses wet cleaner to carry out deodorization washing back discharging.
Step (1) is filtered the material that obtains and is carried out processed, and the solid matter after the dehydration obtains the dewatered sludge feed through after the drying treatment, and the gas that produces in the drying process adopts wet cleaner to carry out deodorization washing back discharging.
Said flocculation agent is solid polyaluminium chloride or polymer coagulant aids, and the consumption of flocculation agent is the 0.1-0.2% of mud dry weight by weight percentage.
The employed purification system of a kind of purifying method of above-mentioned kitchen waste water; It is characterized in that; Comprise the strainer, water-and-oil separator, one-level air flotation slot, overflow sand-bed filter, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, the secondary air-floatation groove that connect successively; Said one-level air flotation slot is connected with the floating device of going up of jet pressure air-dissolving respectively with the secondary air-floatation groove; Be provided with the aerobic treatment blodisc in the said catalytic oxidation groove, said acid-alkali accommodation groove is joined groove with acid respectively and is joined groove with alkali and be connected, and said coagulating agent Preparation tank is connected with the secondary air-floatation groove; The floating device of going up of said jet pressure air-dissolving comprises air, force (forcing) pump, dissolving; Said air is connected with dissolving; Said dissolving is connected with main gas conduit through force (forcing) pump; Main gas conduit is connected with a plurality of gas subtubes arranged side by side, on each gas subtube, evenly is provided with a plurality of nozzles, and a plurality of gas subtubes place one-level air flotation slot or secondary air-floatation groove.
Said intermediate sedimentation groove is the ramp type settling bath, and said water-and-oil separator is the ripple water-and-oil separator.
Said strainer is grid and screen cloth.
One-level air flotation slot, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, secondary air-floatation groove are connected with collection surface respectively; Said collection surface is connected with water extracter, drying machine successively, and the pneumatic outlet of said drying machine is connected with the import of wet cleaner.
The present invention has following technique effect:
1. purifying method of the present invention adopts the blodisc aerobic treatment, has guaranteed the water quality of treating water.Because the waste water in meal kitchen has high grease, high eutrophy and uncertain waste water characteristic, through the technological design test, through the water outlet after the method processing of the present invention, BOD 5(biochemical oxygen demand) and COD (COD) and SS (suspended substance) reach the emission standard of country fully.Purifying method of the present invention adopts anticipating of acid-alkali accommodation to waste water, has improved the biodegradability of waste water on the one hand greatly, has higher removal for the suspension material on the other hand, makes follow-upization processing reach good removal effect.
2. purifying treatment method of the present invention is provided with intermediate sedimentation and handles in the middle of acid-alkali accommodation and biology aerobic processing, and waste water is behind acid-alkali accommodation, and most of organism is removed, and has improved the biodegradability of waste water.Intermediate sedimentation is set handles, can further remove the suspended matter in the water, the residence time of follow-up aerobic treatment and aeration rate are significantly reduced.
3. purifying method of the present invention adopts the secondary jets pressurized air flotation to handle replacement traditional secondary precipitation mode.Characteristics to the meal kitchen; After the blodisc aerobic treatment, along with effusive active sludge is handled in the secondary jets pressurized air flotation, fragment unit weight is light; Higher with traditional precipitated phase than the processing efficiency of air supporting method, adopt the jet air float method to avoid the susceptible to plugging problem of reliever.
4. the waste water of handling through blodisc, the mud that is produced lacks than traditional method, and the water quality of carrying out secondary jet pressurized air flotation processing is had guarantee further.
5. purifying method of the present invention adopts blodisc to carry out aerobe and handles, and the latch up phenomenon of filtrate in the biological filter or the phenomenon of activated sludge bulking can not take place the biosystem that aerobic treatment is set up.The waste water of handling is longer than the filter tank with the biomembranous duration of contact of blodisc disc, can stand the sudden change of load.The microbial film specific activity mud that comes off is prone to deposition.Managing special is convenient, saves running cost, is particularly suitable for little but the water treatment system that concentration is high of wastewater flow rate.
Description of drawings
Fig. 1 is a kitchen waste water purification system synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment to the detailed description of the invention.
The purifying method of kitchen waste water of the present invention comprises the steps:
(1) kitchen waste water passed through the suspended substance that filters to remove wherein, like swill, pluck fragment, fruit bud, tealeaves, pericarp, fish scale, meat mincing etc.Filtration can be adopted grid and screen cloth.
Afterwards, carry out separating of oil material and aqueous substance, and reclaim oil material.Oil material after the recovery can be used as renewable resource utilization.
(2) waste water after the separation uses the floating device of going up of jet pressure air-dissolving to carry out one-level jet pressurized air flotation processing 1.5-3 hour; The process that said jet pressurized air flotation is handled is: with going out tiny, uniform bubble through a plurality of nozzle ejection after the air pressurized; Make and be difficult to settled solid particulate or tiny elaioleucite hydrophobicity by the surface; Stick on the bubble, borrow bubble floating power to take the water surface to, form scum silica frost or oil slick.Waste water after the pressurized air flotation of one-level jet is handled is delivered in the water leg after filtering out scum silica frost and oil slick wherein through the overflow sand-bed filter, and the employing precipitator method are removed throw out.Can remove grease, protein, starch, colloidalmaterial and the silt that carries from raw material in the waste water, a large amount of blood stains that contain when butchering, clot, hair, fiber, not digest foodstuff, ight soil etc. through this step.
(3) waste water after step (2) is handled is delivered in the acid-alkali accommodation groove, detects the pH value of waste water, if pH value<6; Then add alkali and be adjusted to 6≤pH value≤7, if pH value>9 then add acid and are adjusted to 7≤pH value≤9; Fully stir; Make grease, protein, starch, colloidalmaterial dissolving in the waste water, and macromolecular complex is changed into the small molecules dissolved matter, the needs that make water quality be suitable for carrying out a biological disposal upon.Regulate used acid and can use environmentally friendly acidic substance such as acetate, regulate used alkali and can use environmentally friendly alkaline matters such as sodium hydrogencarbonate.
(4) waste water after step (3) is handled is sent into the intermediate sedimentation groove, makes the suspended substance in the waste water be able to deposition; Afterwards, adopt blodisc to carry out aerobic treatment, remove most of dissolved organic matter in the water, aeration rate is 2-3mg/L, and the treatment time is 1-1.5h.
(5) add the floating device of going up of coagulating agent jet pressure air-dissolving in the waste water after the biological treatment and carry out secondary jet pressurized air flotation processing 1.5-3 hour; The process that said jet pressurized air flotation is handled is: with going out tiny, uniform bubble through a plurality of nozzle ejection after the air pressurized; Make to be difficult to settled solid particulate or tiny elaioleucite combines with coagulating agent, form and be easy to sedimentary material; Wastewater sedimentation after the secondary jet pressurized air flotation is handled removes the throw out in the water, and the colourity of waste water is reduced, and discharges after detection reaches emission standard.
When the secondary jet pressurized air flotation was handled, the coagulating agent that in waste water, adds made and is solid polyaluminium chloride or polymer coagulant aids, and the polymer coagulant aids can adopt SEPIGEL 305, activated silica gel, gelatine, sodium-alginate etc.After biochemical treatment, through the manual detection mud dry weight, confirm the consumption of coagulating agent according to mud dry weight, the consumption of coagulating agent is the 0.1-0.2% of mud dry weight by weight percentage.Coagulating agent can destroy waste water colloidal stability, make be difficult in the waste water sedimentary colloidal suspended particle or emulsus pollutent lose stable, collision each other, cohesion or flocculation, overlap joint forms bigger particle or floss, is easier to or come-up and being removed.Select the effective of polymer medicament for use, easy to use, little to equipment corrosion.
In order to carry out utilization of waste material; Collect the throw out that produces in each step, put into collection surface, add flocculation agent; Carry out processed afterwards; Solid matter after the dehydration obtains the dewatered sludge feed through after the drying treatment, and the gas that produces in the drying process adopts wet cleaner to carry out deodorization washing back discharging.Said flocculation agent is solid polyaluminium chloride or polymer coagulant aids, and the consumption of flocculation agent is the 0.1-0.2% of mud dry weight by weight percentage.
Step (1) is filtered the material that obtains and is carried out processed, and the solid matter after the dehydration obtains the dewatered sludge feed through after the drying treatment, and the gas that produces in the drying process adopts wet cleaner to carry out deodorization washing back discharging.
The synoptic diagram of the employed purification system of purifying method of kitchen waste water of the present invention is as shown in Figure 1; Comprise the strainer, water-and-oil separator, one-level air flotation slot, overflow sand-bed filter, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, the secondary air-floatation groove that connect successively; Said one-level air flotation slot is connected with the floating device of going up of jet pressure air-dissolving respectively with the secondary air-floatation groove; Be provided with the aerobic treatment blodisc in the said catalytic oxidation groove; Said acid-alkali accommodation groove is joined groove with acid respectively and is joined groove with alkali and be connected, and said coagulating agent Preparation tank is connected with the secondary air-floatation groove; The floating device of going up of said jet pressure air-dissolving comprises air, force (forcing) pump, dissolving; Said air is connected with dissolving; Said dissolving is connected with main gas conduit through force (forcing) pump; Main gas conduit is connected with a plurality of gas subtubes arranged side by side, on each gas subtube, evenly is provided with a plurality of nozzles, and a plurality of gas subtubes place one-level air flotation slot or secondary air-floatation groove.
Wherein, said strainer is grid and screen cloth.
One-level air flotation slot, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, secondary air-floatation groove are connected with collection surface respectively; Said collection surface is connected with water extracter, drying machine successively, and the pneumatic outlet of said drying machine is connected with the import of wet cleaner.The throw out that produces in one-level air flotation slot, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, the secondary air-floatation groove is collected in the collection surface; Add flocculation agent; Carry out processed afterwards; Solid matter after the dehydration obtains the dewatered sludge feed through after the drying treatment, and the gas that produces in the drying process adopts wet cleaner to carry out deodorization washing back discharging.
Said water-and-oil separator is the ripple water-and-oil separator.Because the waste water oleaginousness in meal kitchen is bigger, except that containing oil slick, also have oil in water emulsion, carry out oily water separation earlier, two purposes are arranged: the one, guarantee to reclaim the waste oil resource and be beneficial to utilize again.The 2nd, grease grease when low temperature is prone to stick on duct wall and equipment, increases the resistance of current, if grease too much gets into biological treatment system, will influence the effect of biological treatment.
The one-level air flotation slot, air flotation slot adopts the method for jet pressurization, and the equipment oil removal rate can be at 50-70% in the molten air supporting.
The acid-alkali accommodation groove: waste water is carried out potential of hydrogen regulate, be beneficial to follow-up aerobic treatment, the acid-alkali accommodation groove is a steel.
The intermediate sedimentation groove is the important step of contact acid-alkali accommodation groove and catalytic oxidation groove, adopts the slope settling bath, reaches the purpose of utilizing the gravity spoil disposal.
Because the water quality and quantity of kitchen waste water changes greatly; Water quality, the water yield for balanced blodisc aerobic treatment equipment water inlet; The efficient of stabilate treatment process needs in acid-alkali accommodation groove and secondary air-floatation groove, to take pneumatic blending, the mandatory circulation of water pump; Assist measures such as machine stirring guarantee the equilibrium of regulating tank effluent quality.
Blodisc in the catalytic oxidation groove carries out aerobic treatment to waste water, removes the most of dissolved organic matter in the water.
To adopt the patent No. be 200820074818.8 for employed wet cleaner among the present invention, and the utility model name is called disclosed equipment in the patent of " wet fume purifier ".
Waste water after through grid and screen filtration, water-and-oil separator the processing of the separating of oil material and aqueous substance, one-level air flotation slot and water leg being anticipated; Promote entering acid-alkali accommodation groove with pump; Get into the intermediate sedimentation groove after being adjusted to suitable potential of hydrogen; Get into the catalytic oxidation groove then, carry out aerobe and handle.Waste water after the biological treatment carries out the secondary jet pressurized air flotation to be handled, and wastewater sedimentation removes the throw out in the water, and the colourity of waste water is reduced, and discharges after detection reaches emission standard.
Method of the present invention purifies and handles from polluting the source.Through detecting; Effluent index data when the kitchen waste water that process purifying method of the present invention and purification system are handled discharges are as shown in table 1; Meet discharging standards; Cut off the greasy wastewater sources of this eutrophy of kitchen waste water from the domestic pollution source, guaranteed the harm that water body and underground water are avoided polluting.
Table 1
Title Go out water quality standard Clearance
COD(mg/L) ≤100 98%
BOD 5(mg/L) ≤40 98%
SS(mg/L) ≤100 98%
pH 6-9
Vegetable and animals oils (mg/L) ≤10 99%
Colourity (doubly) ≤50 75%
Kitchen waste water purifying method of the present invention adopts potential of hydrogen adjusting-blodisc oxidation processing technique to purify the high eutrophication of kitchen waste water, high greasy water quality; And can realize reaching emission standard; Process stabilizing is applicable to the processing of food-processing and related prods high-content waste water.This technology has higher removal to suspended substance, can improve the biodegradability of waste water simultaneously.Processing to kitchen waste water has the higher efficient and the ability of anti-shock loading, to the effective clearance of the equal tool of BOD, COD, colourity and SS.Eliminate kitchen waste water discharging after stain water body and phreatic harm, guaranteed atmosphere and water surrounding.
Although disclosed purifying method and the purification system that relates to a kind of kitchen waste water carried out special description with reference to embodiment; The embodiment that more than describes is illustrative rather than restrictive; Under the situation that does not break away from the spirit and scope of the present invention, all variations and modification are all within scope of the present invention.

Claims (9)

1. the purifying method of a kitchen waste water is characterized in that, comprises the steps:
(1) kitchen waste water is through filtering to remove suspended substance wherein, afterwards, carries out separating of oil material and aqueous substance, and reclaims oil material;
(2) waste water after the separation carries out one-level jet pressurized air flotation processing 1.5-3 hour; The process that said jet pressurized air flotation is handled is: with going out tiny, uniform bubble through a plurality of nozzle ejection after the air pressurized; Make and be difficult to settled solid particulate or tiny elaioleucite hydrophobicity by the surface; Stick on the bubble, borrow bubble floating power to take the water surface to, form scum silica frost and oil slick; Waste water after the pressurized air flotation of one-level jet is handled is delivered in the water leg after filtering out scum silica frost and oil slick wherein through the overflow sand-bed filter, and the employing precipitator method are removed throw out;
(3) waste water after step (2) is handled is delivered in the acid-alkali accommodation groove, detects the pH value of waste water, if pH value<6; Then add alkali and be adjusted to 6≤pH value≤7; If pH value>9 then add acid and are adjusted to 7≤pH value≤9, fully stir; Make grease, protein, starch, colloidalmaterial dissolving in the waste water, the needs that make water quality be suitable for carrying out a biological disposal upon;
(4) waste water after step (3) is handled is sent into the intermediate sedimentation groove, makes the suspended substance in the waste water be able to deposition; Afterwards, adopt blodisc to carry out aerobic treatment, remove most of dissolved organic matter in the water, aeration rate is 2-3mg/L, and the treatment time is 1-1.5h;
(5) add coagulating agent in the waste water after the biological treatment and carry out secondary jet pressurized air flotation processing 1.5-3 hour; The process that said jet pressurized air flotation is handled is: with going out tiny, uniform bubble through a plurality of nozzle ejection after the air pressurized; Make to be difficult to settled solid particulate or tiny elaioleucite combines with coagulating agent, form and be easy to sedimentary material; Wastewater sedimentation after the secondary jet pressurized air flotation is handled removes the throw out in the water, and the colourity of waste water is reduced, and discharges after detection reaches emission standard.
2. the purifying method of kitchen waste water according to claim 1 is characterized in that, said coagulating agent is solid polyaluminium chloride or polymer coagulant aids, and the consumption of coagulating agent is the 0.1-0.2% of mud dry weight by weight percentage.
3. the purifying method of kitchen waste water according to claim 1 and 2 is characterized in that, collects the throw out that produces in each step; Put into collection surface; Add flocculation agent, carry out processed afterwards, the solid matter after the dehydration is through after the drying treatment; Obtain the dewatered sludge feed, the gas that produces in the drying process uses wet cleaner to carry out deodorization washing back discharging.
4. the purifying method of kitchen waste water according to claim 1 and 2; It is characterized in that; Step (1) is filtered the material that obtains and is carried out processed; Solid matter after the dehydration obtains the dewatered sludge feed through after the drying treatment, and the gas that produces in the drying process adopts wet cleaner to carry out deodorization washing back discharging.
5. the purifying method of kitchen waste water according to claim 3 is characterized in that, said flocculation agent is solid polyaluminium chloride or polymer coagulant aids, and the consumption of flocculation agent is the 0.1-0.2% of mud dry weight by weight percentage.
6. employed purification system of purifying method that realizes the said kitchen waste water of claim 1; It is characterized in that; Comprise the strainer, water-and-oil separator, one-level air flotation slot, overflow sand-bed filter, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, the secondary air-floatation groove that connect successively; Said one-level air flotation slot is connected with the floating device of going up of jet pressure air-dissolving respectively with the secondary air-floatation groove; Be provided with the aerobic treatment blodisc in the said catalytic oxidation groove, said acid-alkali accommodation groove is joined groove with acid respectively and is joined groove with alkali and be connected, and the coagulating agent Preparation tank is connected with the secondary air-floatation groove; The floating device of going up of said jet pressure air-dissolving comprises air, force (forcing) pump, dissolving; Said air is connected with dissolving; Said dissolving is connected with main gas conduit through force (forcing) pump; Main gas conduit is connected with a plurality of gas subtubes arranged side by side, on each gas subtube, evenly is provided with a plurality of nozzles, and a plurality of gas subtubes place one-level air flotation slot or secondary air-floatation groove.
7. purification system according to claim 6 is characterized in that, said intermediate sedimentation groove is the ramp type settling bath, and said water-and-oil separator is the ripple water-and-oil separator.
8. purification system according to claim 6 is characterized in that, said strainer is grid and screen cloth.
9. purification system according to claim 6; It is characterized in that; One-level air flotation slot, water leg, acid-alkali accommodation groove, intermediate sedimentation groove, catalytic oxidation groove, secondary air-floatation groove are connected with collection surface respectively; Said collection surface is connected with water extracter, drying machine successively, and the pneumatic outlet of said drying machine is connected with the import of wet cleaner.
CN2009100686091A 2009-04-24 2009-04-24 Purification method and purification system of kitchen waste water Expired - Fee Related CN101870538B (en)

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