CN1078959A - Fe-C flocculation bed device and be used to handle kitchen waste water - Google Patents
Fe-C flocculation bed device and be used to handle kitchen waste water Download PDFInfo
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- CN1078959A CN1078959A CN 93100832 CN93100832A CN1078959A CN 1078959 A CN1078959 A CN 1078959A CN 93100832 CN93100832 CN 93100832 CN 93100832 A CN93100832 A CN 93100832A CN 1078959 A CN1078959 A CN 1078959A
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Abstract
The present invention relates to a kind of Fe-C flocculation bed device that is used for sewage disposal and handle the method for kitchen waste water with this device, device of the present invention is made of bed body, filler and gas distribution system, and filler is mixed by carbon containing iron filings and loose material particle and forms.The adding of loose material particulate has solved Fe-C flocculation bed this key issue that hardens easily, and helps realizing that gas-liquid-solid three-phase fully contacts, and improves processing efficiency.Handle kitchen waste water with apparatus of the present invention, method is simple, and all above 90%, the COD clearance reaches more than 75% to the clearance of oil content of wastewater and BOD, and energy-conservation, take up an area of less, cost is low.
Description
The present invention relates to a kind of Fe-C flocculation bed device that is used for sewage disposal, and utilize this device to handle the method for kitchen waste water.
The US4525254 United States Patent (USP) has been introduced with iron carbon galvanic cell and iron copper galvanic cell device and has been handled heavy metal wastewater thereby and contain gold tricyanide, silver cyanide waste water; processing contains organic gas floatation agent waste water and petroleum products waste water; the shortcoming of its existence is to add granular graphite or copper scale do reaction negative electrode; and device is complicated huge, and equipment attrition is serious.
" Environmental Pollution and Control " the 11st rolls up the 32nd to 35 page of the 1st phase and introduced a kind of iron carbon reduction method device of handling electroplating integrated sewage, its galvanic cell adds the coke grain by iron filings and forms, this device is actually a kind of filter bed and handles, fail fully to realize gas-liquid-solid phase reaction, in addition, the inefficacy of luming easily of its filter bed, though can be processed into the vesicular structure thing to iron filings by adopting the high frequency sintering technology, but cost is increased greatly, and behind the high frequency sintering, the protruding peak of the cusped edge of iron filings (reactive activity point) disappears, and speed of response is descended.
The kitchen waste water composition is extremely complicated, contains various organism, wherein based on animals and plants oil, protein, starch, sugar, Mierocrystalline cellulose, tensio-active agent etc., also contains inorganic salt simultaneously.In the area of The Third Industry prosperity, kitchen waste water is the major cause that causes the rivers and lakes organic contamination.Biochemical process was used in the processing of this class sewage mostly in the past, and also had report to adopt flocculation-air floating method (He Wei's light etc., " environmental science ", 9(1), 1988).The biochemical process working cost is low, but investment is bigger, and floor space is also big, oil in the sewage and tensio-active agent can bring difficulty to biochemical treatment, for keeping the bacterium eubolism, need the temperature of control operation and the nutrition of water body, thereby require strict management.And, no matter adopt which kind of biochemical method, all there is the secondary air pollution problem.Though can remedy the deficiency of biochemical process as the flocculation-air floating method, its used medicament expense is with higher, the user is difficult to bear day by day.
The object of the present invention is to provide Dan Yihang between a kind of structure, cost is low, the Fe-C flocculation bed device that processing efficiency is high, and handle the method for kitchen waste water with this device, to overcome the existing in prior technology shortcoming.
Fe-C flocculation bed device of the present invention is made of bed body (also claiming shell) and filler.The bed body is provided with the gas distribution system that is made of inlet pipe and gas distribution pipe, and inlet pipe is located at external of bed, and gas distribution pipe is located in the body, and a plurality of cloth gas ports are arranged, and is distributed in below the filler, perhaps is distributed in the middle of the filler, and cross-wise direction air inlet in length and breadth can both be carried out equably.Filler is mixed by carbon containing (graphite) iron filings and loose material particle and forms, and fills in the body.
The distribution device of its real forms such as the also available air distribution head of gas distribution pipe, air distribution plate replaces.
Carbon containing iron filings in the filler and loose material particulate heap volume ratio are generally (1～2): 1.The iron filings that the carbon containing iron filings can adopt the machine cut cast iron part to be produced.Used loose material particle is preferably the porous plastics grain, and its granular size is generally about 10mm * 10mm * 10mm.
The bed body of apparatus of the present invention can be tower or pool-type structure, and the former relatively is applicable to the situation that the amount of disposing of sewage is less, and the latter then comparatively is applicable to the situation that the amount of disposing of sewage is bigger.
When flocculation bed bed body was the cylinder pyramidal structure, its main body was made of the identical column type cylindrical shell stack of one or more structures.The bottom of each column-shaped barrel is provided with the porous card, leaves the space between the filler of this a porous card and a following column-shaped barrel.The blade diameter length ratio of each column-shaped barrel is generally 1: (1～2).Hand hole can also be offered in the bottom of column-shaped barrel, so that change filler.
When flocculation bed bed body is pond shape structure, the comparable tower of its structure is simplified, only need copy general filter tank structure to construct pond body (as cubic pond or circular cement pit), evenly dispose gas distribution pipe (gas distribution point) in the cross section in length and breadth at Chi Tizhong then, reinstall filler, sewage evenly enters the flocculation bed fillers, from top discharge from following multiple spot.
Device of the present invention adopts carbon containing (graphite) iron filings and loose material particle to mix composition flocculation bed fillers; graphite in the iron filings becomes the micro cathode group to iron; form efficient galvanic cell, do not need to add carbon granules again and make negative electrode, and the protruding peak of the cusped edge of iron filings is the good reaction activity point.The loose material particulate adds can prevent that iron filings from hardening.Solved a key issue during the Fe-C flocculation bed technique is used.Simultaneously, add the loose material particle and also help the gas-liquid-solid triphasic abundant contact of realization, improve processing efficiency.Iron filings are in reaction process (sewage treatment process), constantly break down into tiny iron filings grain, these fine particles stick on the loose material, because they have flourishing specific surface area thereby have very high reactive behavior, being reflected on the anode of galvanic cell is the electrochemical dissolution of iron, in near the reduction reaction (because the pH value of kitchen waste water is neutral zone, so do not produce the cathode hydrogen evolution reaction) that on the graphite cathode is oxygen.Dissolved iron ion and water and oxygen molecule carry out a series of very complex physico-chemical, generate multiple ferriferous oxide, and some ferriferous oxide can the envelope contaminant molecule in forming process.The ferriferous oxide of some nascent state has good throwing out to the pollutent of colloidal, and can flocculate removes pollutent.Ferriferous oxide itself is again fabulous sorbent material, and the water pollutant molecule is played the adsorbing and removing effect.Cathodic process produces a lot of intermediate state products, and wherein some product (as hydrogen peroxide) has very strong oxidation capacity, and is very favourable to removing the middle organism that anhydrates.The integration capability of one powerful removal water pollutant has been formed in all these effects.
Fe-C flocculation bed device of the present invention is used to handle kitchen waste water, has good effect and high processing efficient.
Kitchen waste water contains oil slick and dregs, removes oil slick and can use oil trap, and the removal dregs can be with various sieving device for trapping.The sewage that enters the flocculation bed of the following indication of the present invention is meant through removing the kitchen waste water of oil slick and dregs.
The method of utilizing device of the present invention to handle kitchen waste water is sewage to be fed Fe-C flocculation bed device handle, while feeding the sewage bubbling air, but aerating oxygen with good conditionsi, the purpose of bubbling air are to enable fully to realize gas-liquid-solid phase reaction, improve processing efficiency; Sewage is transferred PH8～9 after the flocculation bed is handled, add the coagulating agent coagulation then, and through precipitating the organic complex of removing ferriferous oxide, suspended substance, iron ion and iron ion in the water, the water outlet of post precipitation can reach emission standard after filtration.
According to the method described above, feed the sewage of flocculation bed and the volume ratio of air and be generally 1: (1～3); The treatment time (i.e. the time that flocculation bed in stops) of sewage in the flocculation bed was generally 3～15 minutes, and this time can be regulated by the valve controlling flow amount; Coagulating agent can be used the poly aluminium chloride of a PACS(modification) or other coagulating agent, the coagulating agent add-on is generally 4～7ppm(in Al O).
Because Fe-C flocculation bed cathodic process is the reduction reaction of oxygen, so realize that gas-liquid-solid triphasic abundant contact is that the present invention obtains one of key of efficient clearance.In the present invention, blast air except that the required oxygen of reaction is provided, also play the effect on continuous flushing iron filings surface, the iron filings surface is brought in constant renewal in, be difficult for losing activity; Simultaneously, the air that blasts constantly is hit flocculation bed (filler), has both guaranteed gas-liquid-solid triphasic abundant contact, helps again preventing that iron filings from hardening.
The process that the present invention disposes of sewage is the original battery electrochemistry reaction, does not need extra electric field, and not power consumption of reaction process is a kind of sewage purification technology of the economic energy.Adopt apparatus and method of the present invention to handle kitchen waste water, the COD clearance reaches more than 75%, and the clearance of oil content of wastewater and BOD is all above 90%, and not only processing efficiency height, and device and technology are all simple, and the running cost expense is lower, and operational administrative is easy.
Below in conjunction with drawings and Examples device of the present invention and application method thereof are described further.
Fig. 1 is a kind of structural representation of Fe-C flocculation bed device of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is a kind of process flow diagram that device of the present invention is used to handle kitchen waste water.
See figures.1.and.2; the bed body of flocculation bed device is the cylinder turriform; the main body of bed body can be made of the column-shaped barrel that extremely a plurality of structures are identical 1 stack; be filled with in each column-shaped barrel by carbon containing (graphite) iron filings and foamed plastics grain and mix the flocculation bed fillers 2 that forms; one porous card 3 is arranged at the column-shaped barrel bottom; it also plays water-locator except playing the support filler, sewage is entered in the filler equably. One cone 4 is arranged at the bottom of bed body, and blow-off pipe 5 is arranged at its bottom, and this conical structure of bed body bottom can make the deposit of flocculation bed assemble easily, and drains by blow-off pipe 5. Cone top connects water inlet pipe 6 with tangential direction, and sewage enters cone 4 from water inlet pipe 6 with tangential direction, and current form eddy flow in cone, favourablely enters in the flocculation bed fillers 2 by porous card 3 equably, and bed body top is provided with overflow launder 7, overflow launder forms water seal, prevents that filler is exposed in the air and dry caking. Delivery port 8 and back-flushing entrance 9 are arranged on the overflow launder 7, and sewage is discharged from delivery port 8 after flocculation bed reason, and back-flushing entrance 9 supplies periodically backwash usefulness of flocculation bed, and the back-flushing flushing is rear is drained by bottom blow-off pipe 5. Gas distribution pipe 10 is disposed at below the porous card 3 of each column casing body 1 equably, also can side by side be disposed at the centre of whole filler 2, and the cross-sectional direction air inlet can both be carried out equably. Gas distribution pipe 10 is connected with the air inlet pipe 11 of external of bed.
With reference to Fig. 3, remove solid sundries (such as dish slag, bone, meat slag, rice grain, paper scrap, toothpick etc.) from the sewage in kitchen through barrier, screen cloth 12 sievings, flow into then oil interceptor 13, every falling most of oil slick. Oil interceptor can adopt general standard design to build. Sewage is after above-mentioned mechanical-physical purifies, and remaining oil content mainly exists with emulsion form, and other pollutants exist mainly with water-soluble form or colloidal state greatly. The sewage that comes out from oil interceptor flows into storage pond 14, storage pond 14 is to use as regulating reservoir or balancing tank, because the pollutant levels of kitchen waste water are to change with the business hours, it is very big to rise and fall, so preferably there is a balancing tank to exist, allow concentration of wastewater be able to balanced the adjusting, trend steadily is beneficial to the stable operation of a whole set for the treatment of facility. The sewage in storage pond 14 is sent into flocculation bed device 19 with centrifugal pump 16, and filter 15 is equipped with at centrifugal pump pump orifice place, so that flowmeter 17 is shielded. Flowmeter 17 is used for being metered into the discharge of sewage of flocculation bed. Sewage is further removed the solid dregs through filter 18 before entering the flocculation bed again. Filter 15 can curve cylindrical shape with 4～5 order stainless steel cloths, and two layer of 20 purpose nylon wire of outsourcing consists of. When sewage enters flocculation bed device 19, by compressor 30 air is passed into flocculation bed device by air inlet pipe, gas mixes with current in the flocculation bed, and with a flocculation bed water outlet discharge. Sewage is subjected to the series of physical chemical action and is cleaned in the flocculation bed. The water outlet of flocculation bed enters in mixed 21 devices, adds alkali by 20 controls of PH meter in blender 21, and the pH value of regulating water is 8～9. The water that mixes up pH value enters blender 22, adds coagulant and sewage and fills part mixing, and carries out coagulating, forms floc sedimentation. Sewage enters sedimentation basin 23 behind coagulation, and in sedimentation basin, the floc sedimentation in the sewage is able to sedimentation separation. The sedimentation basin water outlet is metered into pressure filter 27 through intermediate pool 24 usefulness pumps 25 through flowmeter 26 again and filters, and further removes sediment residual in the water. The water outlet of pressure filter 27 can reach discharge standard, enters sewer (or make flushing water and use). Flocculation bed device 19 is provided with the back-flushing pipeline, and back-flushing can be running water, also can be through The water outlet of this flow processing. The effect of back-flushing is regularly the deposit of iron filings in the filler and bulk material particle surface to be removed, and is conducive to keep the reactivity of flocculation bed. Get back to the storage pond 14 from the blow-off pipe discharge of flocculation bed bottom after the back-flushing flushing. The mud that sedimentation basin 23 produces is delivered to filter press 29 press filtrations with pump 28, and filtrate is gone back to storage pond 14, and filter residue send landfill or incineration.
Embodiment 1: adopt Fe-C flocculation bed device of the present invention, filler is formed by cast iron filing and porous plastics grain uniform mixing, and both heap volume ratios are 1: 1.Sewage is artificial preparation simulated sewage, containing peanut oil 300mg/l, washing composition 600mg/l(based on sodium alkyl benzene sulfonate) PH is about 6.5, and it is aqueous that sewage is milkiness, and sewage is sent into the flocculation bed by header tank, with the valve controlling flow amount, making its treatment time in the flocculation bed is 10 minutes.The limit feeds sewage limit bubbling air, the air that feeds and the volume ratio of sewage are 3: 1, the exit point (gas distribution pipe outlet) of air in the flocculation bed is uniformly distributed in three zones, filler upper, middle and lower, guarantees gas-liquid-solid triphasic abundant contact, and air and sewage rise in the same way.Sewage is transferred pH value to 8 with diluted alkaline (for example 5%NaOH) liquid after the flocculation bed is handled, add PACS coagulating agent 4mg/l(again in Al O) coagulation 5 minutes, after precipitation leaves standstill 10 minutes, get upper clear supernate and detect treatment effect, oil content of wastewater is reduced to 16.9mg/l, and the oleaginousness clearance is 94.4%.
Embodiment 2: preparation manual simulation sewage, sewage contain peanut oil 200mg/l, washing system 150mg/l(based on sodium alkyl benzene sulfonate), pH value is about 6.5, sewage is fed Fe-C flocculation bed device of the present invention handle, and the limit feeds sewage limit bubbling air.The outlet (gas distribution pipe outlet) of air in the flocculation bed is uniformly distributed in below the filler, and the stacking volume ratio of cast iron filing and porous plastics grain is 2: 1, and the air of feeding and the volume ratio of sewage are 1: 1, and the treatment time of sewage in the flocculation bed is 3～4 minutes.The sewage that comes out from the flocculation bed transfers to 8 with sig water with pH value after treatment, adds PACS coagulating agent 7mg/l(then in Al O), coagulation 5 minutes, static postprecipitation, get top clear water sample and measure oleaginousness, oil content of wastewater is reduced to 3mg/l, and clearance is 98.5%.
Embodiment 3: handle the dining room kitchen waste water with Fe-C flocculation bed device of the present invention, sewage through every slag behind oil slick, it is aqueous to be milkiness, pH value about 6.3, oleaginousness is 85.6mg/l, flocculation bed device is a pyramidal structure, and filler medium cast iron bits are 1.5: 1 with the ratio of porous plastics grain, and processing technological flow as shown in Figure 3.Sewage is with being pumped into flocculation bed device, and the limit feeds sewage limit bubbling air, and the sewage of feeding and the volume ratio of air are 1: 1, and the treatment time of sewage in the flocculation bed is 10 minutes.Sewage is regulated pH value to 8 with sig water (NaOH) after the flocculation bed comes out, every liter adds 7mg PACS coagulating agent (in Al O) coagulation then, and behind sedimentation and filtration, oil content of wastewater is reduced to 7.4mg/l, and clearance is 91.3%.
Embodiment 4: the dining room kitchen waste water is through behind slag and oil slick, and it is aqueous to be milkiness, and PH is about 6.3, and COD is 1040mg/l, BOD508mg/l.Treatment unit and flow process, condition is identical with embodiment 3.Sewage COD is after treatment reduced to 74.4mg/l, and clearance is 95.8%; BOD reduces to 38.0mg/l, and clearance is 92.5%.
Claims (8)
1, a kind of Fe-C flocculation bed device that is made of bed body and filler is characterized in that filler is mixed by carbon containing (graphite) iron filings and loose material particle to form, and fills in the body; The bed body is provided with the gas distribution system that is made of inlet pipe and gas distribution pipe, and inlet pipe is located at external of bed, and gas distribution pipe is located at a body inside, be distributed in below the filler or (with) in the filler.
2,, it is characterized in that the loose material particle in the filler is the porous plastics grain according to the described device of claim 1.
3,, it is characterized in that iron filings and loose material particulate heap volume ratio is (1～2) in the filler: 1 according to claim 1 or 2 described devices.
4, according to the described device of claim 1, it is characterized in that a body is a pyramidal structure, be formed by stacking to the identical column-shaped barrel of a plurality of structures by 1, one porous card is arranged at each column-shaped barrel bottom, the filler branch fills in above the porous card in each column-shaped barrel, leaves the space between the filler of a porous card and a following column-shaped barrel; Gas distribution pipe be uniformly distributed in below the porous card or (with) be uniformly distributed in the filler; One cone is arranged at the lathe bed bottom, and blow-off pipe is arranged at its bottom, is connected with water inlet pipe with tangential direction on the cone; Overflow groove is arranged at lathe bed top, and water outlet is arranged on the overflow groove.
5, according to the described device of claim 4, the blade diameter length ratio that it is characterized in that column-shaped barrel is 1: (1～2).
6, according to the described device of claim 1, it is characterized in that a body is a pool-type structure, filled and gas distribution system is set therein forms by the pond body, sewage by the pond at the bottom of multiple spot evenly enter, discharge from filler top.
7, be used to handle the method for kitchen waste water according to the described device of claim 1, it is characterized in that sewage is fed described Fe-C flocculation bed device to be handled, while feeding the sewage bubbling air, sewage is transferred pH8～9 after treatment, add the coagulating agent coagulation then, after precipitation, filtration, can reach emission standard.
8, in accordance with the method for claim 7, it is characterized in that feeding the sewage of Fe-C flocculation bed device and the volume ratio of air is 1: (1～3), the treatment time of sewage in the flocculation bed is 3～15 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100832 CN1048005C (en) | 1993-01-10 | 1993-01-10 | Fe-C flocculation bed device and use for treating kitchen waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100832 CN1048005C (en) | 1993-01-10 | 1993-01-10 | Fe-C flocculation bed device and use for treating kitchen waste water |
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| Publication Number | Publication Date |
|---|---|
| CN1078959A true CN1078959A (en) | 1993-12-01 |
| CN1048005C CN1048005C (en) | 2000-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 93100832 Expired - Fee Related CN1048005C (en) | 1993-01-10 | 1993-01-10 | Fe-C flocculation bed device and use for treating kitchen waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396622C (en) * | 2004-07-29 | 2008-06-25 | 上海凡清环境工程有限公司 | Flocculation reactor |
| CN103130308A (en) * | 2013-03-21 | 2013-06-05 | 东莞市珠江海咸水淡化研究所 | Electrochemical waste water treatment system and method for performing waste water treatment by using same |
| CN103241810A (en) * | 2013-05-31 | 2013-08-14 | 江苏大学 | Three-dimensional electrolysis waste water treatment device |
| CN104761107A (en) * | 2015-05-04 | 2015-07-08 | 河海大学 | Irrigated area domestic wastewater activated iron-anaerobe coupling strengthening and nitrogen and phosphorus removal device |
-
1993
- 1993-01-10 CN CN 93100832 patent/CN1048005C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396622C (en) * | 2004-07-29 | 2008-06-25 | 上海凡清环境工程有限公司 | Flocculation reactor |
| CN103130308A (en) * | 2013-03-21 | 2013-06-05 | 东莞市珠江海咸水淡化研究所 | Electrochemical waste water treatment system and method for performing waste water treatment by using same |
| CN103130308B (en) * | 2013-03-21 | 2013-12-11 | 东莞市珠江海咸水淡化研究所 | Electrochemical waste water treatment system and method for performing waste water treatment by using same |
| CN103241810A (en) * | 2013-05-31 | 2013-08-14 | 江苏大学 | Three-dimensional electrolysis waste water treatment device |
| CN103241810B (en) * | 2013-05-31 | 2014-08-20 | 江苏大学 | Three-dimensional electrolysis waste water treatment device |
| CN104761107A (en) * | 2015-05-04 | 2015-07-08 | 河海大学 | Irrigated area domestic wastewater activated iron-anaerobe coupling strengthening and nitrogen and phosphorus removal device |
| CN104761107B (en) * | 2015-05-04 | 2017-08-08 | 河海大学 | Irrigated area sanitary sewage active iron anaerobe coupling and intensifying denitrification dephosphorization apparatus |
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| Publication number | Publication date |
|---|---|
| CN1048005C (en) | 2000-01-05 |
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