CN101549939A - Leather making integrated waste water treatment method - Google Patents
Leather making integrated waste water treatment method Download PDFInfo
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- CN101549939A CN101549939A CNA2009100981745A CN200910098174A CN101549939A CN 101549939 A CN101549939 A CN 101549939A CN A2009100981745 A CNA2009100981745 A CN A2009100981745A CN 200910098174 A CN200910098174 A CN 200910098174A CN 101549939 A CN101549939 A CN 101549939A
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Abstract
The invention discloses a leather making integrated waste water treatment method, which comprises: passing the leather making integrated waste water through a grid, an oil removing pool, an adjusting pool, a coagulation and deposition pool, a hydrolysis acidification pool, a facultative pool, a homogenizing pool, a second deposition pool and a suspended organisms filtering pool; returning part of the outlet water from the suspended organisms filtering pool to the facultative pool; returning part of the sludge in the second deposition pool into the hydrolysis acidification pool, and concentrating, press filtering, dewatering and transporting out the other sludge; adding compound enzyme promoting agent containing ferro into the homogenizing pool; adding nitrobacteria into the suspended organisms filtering pool; and applying polyurethane foam carrier in the facultative pool and the suspended organisms filtering pool. The invention can avoid poison accumulation, and guarantee the waste water treatment facility to operate normally; treats the high strength ammonia in the waste water by the suspended organisms filtering pool, can guarantee the outlet water to reach discharge standard; applies biomembrane method in the facultative and denitrification pool, can avoid the denitrification sludge from losing; and has a high pollutant treatment load and less occupied area.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, specifically a kind of leather making integrated waste water treatment method.
Background technology
Tanning industry is that China's emphasis pollutes one of industry, accounts for 0.3% of China's industrial wastewater discharge total amount; Ten thousand yuan of output value blowdown flow rates of leather industry occupy the 3rd at light industry, are only second to papermaking and liquor industry.Containing pollution substances such as a large amount of fat, protein, suspended substance, inorganic salts, sulfide, chromium, xylogen and vegetable tanning agent in the leather-making waste water, is one of seriously polluted, unmanageable trade effluent.
Leather production generally need be passed through a plurality of operations such as immersion, liming depilation, deliming, pickling, tanning, neutralization, stuffing, dyeing, and water quality, the water yield that each operation produces are widely different.Synthetic leather wastewater pH value after each operation waste water compiles is at 8-12, CODcr, BOD
5, SS, NH
3-N concentration is all very high, and hazardous and noxious substances and inorganic salts concentration are also very high.Table 1 is a tanning industry comprehensive wastewater water quality situation.
Table 1 tanning industry comprehensive wastewater water quality situation
Leather enterprise adopts leather-making waste water to separate processing more at present, i.e. sulfur-bearing, chrome waste liquid elder generation individual curing; Comprehensive wastewater adopts " materialization+biochemistry " treatment process again.The more biochemical process of domestic application has oxidation ditch process, SBR technology, and the biological contact oxidation metallization processes of employing and A/O technology are also arranged.Water outlet CODcr after above-mentioned art breading is generally about 300mg/L, and ammonia nitrogen concentration is generally more than 200mg/L, can't reach at all country's " integrated wastewater discharge standard " (GB8978-1996) primary standard (the COD emission standard is 100mg/L, NH
3-N water outlet emission standard is 15mg/L), intermittent mud intoxicating phenomenon also appears simultaneously.
This is because there is following technological deficiency in present tanning sewage treatment technology:
1, the active sludge chromium poisoning causes system crash
The pollution of chromium source mainly comes from chrome tanning and retanning operation.The waste water of most leather-making enterprises dischargings does not have the chromium moisture flow, thereby causes a large amount of chromium to enter biological treatment system.And active sludge is strong to the adsorption of chromium, and adsorptive capacity is big, so chromium is accumulated in active sludge easily.As in the oxidation ditch process of mud time in age length, chromium is accumulated in a large number at active sludge, causes active sludge to poison, and causes the treatment facility paralysis, and loss is serious.According to statistics, a chromium poisoning incident takes place in tanning sewage treatment plant every three months basically, causes the treatment facility paralysis, and large amount of sewage can only be in line, and environmental hazard is very big.
2, the accumulation of active sludge calcium causes processing power low
Leather liming epilation process need add large quantities of lime, increased the calcium ion concn in the sewage greatly, under a large amount of aeration conditions, be easy in the biochemistry pool generate precipitation of calcium carbonate in Sludge Surface, reduce the effective microbe amount of mud, have only about 0.2 as MLVSS/MLSS in the active sludge of oxidation ditch process, i.e. the living microorganism amount of having only 1g/L in the 5g/L mud, all the other are most of to be inorganic components (mainly being lime carbonate).Effectively biomass is little, causes biological treatment system efficient to descend greatly.Separate oxidizing process processing leather-making waste water if adopt biology to connect, calcium ion combines with carbanion, and the lime carbonate of generation can cover filling surface, and through the operation of 2-4, microbial film is difficult to form, and the biochemical treatment effect worse and worse.
3, ammonia nitrogen pollutant removal ability is low
By the ammonium salt deliming is the method that present leather-making enterprises generally adopts, because the adding in a large number of ammonium salt, makes that ammonia nitrogen concentration reaches 200～300mg/L in the tanning sewage.It is almost nil that existing process hides treatment process is handled the ammonia nitrogen function.This is that its quantity accounts for below 5% of active sludge microorganism amount because the nitrifier multiplication rate in technologies such as oxidation ditch, SBR is slow.Therefore, technologies such as oxidation ditch, SBR, A/O only are suitable for the processing of low-concentration ammonia-nitrogen waste water, are used for handling the ammonia nitrogen waste water of higher concentrations such as process hides, can't qualified discharge.
There is above technological deficiency in general tanning sewage treatment process, and (GB8978-1996) standard, particularly ammonia nitrogen seriously surpass discharge index to cause treat effluent to be difficult to reach country's " integrated wastewater discharge standard ".Therefore, under the prerequisite of carrying out cleaner production minimizing pollutant discharge amount, must reform, realize the qualified discharge of pollutent the tanning sewage treatment process.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of leather making integrated waste water treatment method is provided.
Leather making integrated waste water treatment method is: synthetic leather wastewater enters grid, grease removal tank, equalizing tank, coagulative precipitation tank successively, remove thicker foreign material by grid, grease removal tank is removed oleaginous materials, the sulphur removal of equalizing tank air aeration, and coagulative precipitation tank is removed most suspended substances and colloidal materials; The coagulating sedimentation water outlet enters hydrolysis acidification pool, oxygen compatibility pool, balancing reservoir, second pond, suspending biological filter successively, the suspending biological filter water part is back to oxygen compatibility pool, the second pond sludge part is back to hydrolysis acidification pool, all the other mud are transported outward after concentrating filter-press dehydration, balancing reservoir adds the compound enzymatic agent of iron content, suspending biological filter adds nitrifier, oxygen compatibility pool and suspending biological filter adopt polyurethane foam carrier, the pH of hydrolysis acidification pool is 6.5～7.5, the pH of oxygen compatibility pool is 7～7.5, the pH of balancing reservoir is 6～8, and the pH of suspending biological filter is 7～8.2; The dissolved oxygen of hydrolysis acidification pool is 0.1～0.3mg/L, and the dissolved oxygen of oxygen compatibility pool is 0.2～0.4mg/L, the dissolved oxygen 2～4mg/L of balancing reservoir, the dissolved oxygen 2～4mg/L of suspending biological filter.
The compound enzymatic agent dosage of described iron content is 0.1～1.5g/L.The compound enzymatic agent of iron content is a molysite.Molysite is ferrous sulfate, poly-iron or contains iron complexes.The nitrifier dosage is for handling 0.04～0.1% of synthetic leather wastewater Total Water.It is the polyurethane foam carrier of 0.2～0.5mm that oxygen compatibility pool adopts the aperture, the 30-70% that the polyurethane foam carrier dosage holds for the oxygen compatibility pool pond.It is the polyurethane foam carrier of 0.1～0.3mm that suspending biological filter adopts the aperture, the 30-70% that the polyurethane foam carrier dosage holds for the suspending biological filter pond.
The beneficial effect that the present invention compared with prior art has:
1) the present invention can avoid the poisonous substance accumulation, guarantees the normal operation of sewage treatment facility;
2) the present invention adopts the high ammonia nitrogen in the biological filter processing waste water, can guarantee the qualified discharge of water outlet;
3) double oxygen denitrification pond employing biomembrance process of the present invention can be avoided the loss of denitrification mud;
4) Pollutant Treatment load of the present invention is high, and floor space is few;
5) the present invention adopts hole urethane filler as bio-carrier, good hydrophilic property, and the fixation of microbe ability is strong.
Description of drawings
Accompanying drawing is the process flow sheet of leather making integrated waste water treatment method.
Embodiment
The present invention is directed to the active sludge chromium, the calcium accumulation that occur in the present synthetic leather wastewater biologic treating technique and cause the biological treatment system inefficiency, even the problem of whole biochemical system collapse, take following method to avoid the generation of the problems referred to above.At first, chromium, calcium are had stronger characterization of adsorption, utilize the sludge absorption in the hydrolysis acidification pool to remove chromium, the calcium that enters in the biochemical system, thereby solved follow-up biochemical system chromium, calcium accumulation problem to a certain extent according to active sludge.The mud of a large amount of chromium of absorption, calcium is regularly discharged in the hydrolysis acidification pool, and the excess sludge that produces in the balancing reservoir enters hydrolysis acidification pool, as the source of hydrolysis acidification pool mud.Once more, because balancing reservoir mud is short age, poisonous substance is difficult for accumulation, has further avoided chromium, the calcium accumulation problem in biochemical system.Because grid, grease removal tank, equalizing tank, coagulative precipitation tank are ordinary method, hereinafter only acidication, the oxygen denitrification of holding concurrently, homogenizing, suspending biological filter combination process partly are elaborated.
Hydrolysis acidification pool
The main effect of hydrolysis acidification pool is chromium and the calcium of removing in the synthetic leather wastewater, remove the suspended matter in the waste water simultaneously, the function that also has acidication technology self, both can remove the suspended matter in the waste water significantly, the degraded that is difficult to biodegradable material that contains in the promotion leather-making waste water, as macromolecular compounds such as various softening agents, permeate agent and tensio-active agents, improve the B/C ratio of waste water.Simultaneously, the mud generation of whole biochemical system reduces greatly, has saved the sludge treatment disposal costs.Hydrolysis acidification pool adopts the upward flow formula, and the perforated pipe water distribution is of a size of: 14.6m * 7.3m * 5m (H), available depth 4.7m, hydraulic detention time 8h.Arrange aeration tube, gas distribution and cloth mud when needed on water distributor top.Sludge drainage system adopts the static pressure mud discharging device, and along the vertical multiple spot spoil disposal of rectangle form pool, the spoil disposal point is located at middle and upper part, mud district.Homogenizing settling tank residual sludge pump is gone into the hydrolysis acidification pool.The pond body structure is half ground type Reinforced Concrete Structure.
Oxygen compatibility pool
Oxygen compatibility pool mainly has been denitrification, and suspending biological filter effluent recycling to oxygen compatibility pool is carried out denitrification.Nitric nitrogen is transformed into gas such as nitrogen to be removed, and simultaneously, denitrifying bacteria can be removed the organism of easy degraded and produce a large amount of basicity under the oxygen condition of holding concurrently, and is the follow-up nitrated part basicity that compensated.Therefore, denitrification process has not only reduced the water outlet total nitrogen concentration, but also has reduced cost of sewage disposal.Consider in the suspending biological filter water outlet that nitric nitrogen or nitrite nitrogen concentration are higher, can produce a large amount of gas in denitrification process, denitrification mud runs off easily, and biomembrance process is adopted in the oxygen denitrification pond of therefore holding concurrently, and adds polyurethane foam as carrier.This carrier and above-mentioned suspending biological filter application carrier are more approaching, but the aperture wants big, and preferred aperture is 0.2-0.5mm.The suspending biological filter effluent recycling is to oxygen compatibility pool, and reflux ratio is 1: 1.Oxygen compatibility pool adopts deflector type up and down, is of a size of 16m * 10m * 5m (H), and available depth is 4.6m, interior branch three lattice, and the name residence time is 12h.Add suspending carrier, dosage is 40% of a pond body useful volume.Micropore aeration pipe is installed at the bottom of the pond, and gas-water ratio is 4: 1.The pond body structure is half ground type Reinforced Concrete Structure.
Balancing reservoir
Balancing reservoir by the most of organism in the aerobic microbiological removal waste water, is further removed chromium, calcium in the waste water as a kind of improved activated sludge process simultaneously.It can add the compound enzymatic agent of different amounts, described compound enzymatic agent iron content according to wastewater characteristics.The compound enzymatic agent that adds can stimulating organism growth, improved the activity of active sludge, simultaneously, this compound enzymatic agent also has the flocculation function, can promote the removal of pollutent in the waste water.The general sludge age of weak point that adopts of homogenizing process, poisonous substance is difficult for accumulation.Main effect is that balancing reservoir is of a size of 15m * 15m * 5m (H), and available depth is 4.5m, and the name residence time is 16.2h.Micropore aeration pipe is installed at the bottom of the pond, and gas-water ratio is 25: 1.Chemicals dosing plant is installed on balancing reservoir top, adds compound enzymatic agent, and dosage is determined according to actual needs.The pond body structure is half ground type Reinforced Concrete Structure.
Second pond
Second pond is mainly used in the mud-water separation of balancing reservoir water outlet.Second pond is of a size of 26m * 8m * 4.5m (H), in be divided into two lattice, every lattice are 26m * 4m * 4.5m (H), available depth is 4.2m, surface load is 0.6m
3/ (m
2H).The second pond sludge part is back to balancing reservoir, and residual sludge pump is gone into the hydrolysis acidification pool.
Suspending biological filter
Suspending biological filter is a kind of new bio filter tank technique, has adopted a kind of polyurethane foam as carrier, and microorganism can be fixed on the carrier.The preferred aperture of this carrier is 0.1-0.3mm, and load quantity of microorganism is more than 20g/L, and support density is at 0.9-1.0g/cm behind the water holding
3Suspending biological filter carrier filling ratio can be adjusted as required, because carrier can freely roll, and excess sludge is less, is difficult for stopping up, and does not need back flushing, is mainly used in the nitrated of ammonia nitrogen in the waste water.The present invention screens, has tamed out nitrifier, the nitrococcus that leather-making waste water was imitated and can be adapted to many plant heights from leather-making mud, fixing and extension by the suspending biological filter carrier is cultivated, ammonia nitrogen in the leather-making waste water can be reduced to below the 1mg/L, the ammonia nitrogen removal load reaches 1.5kgNH
3-N/m
3.d more than.Remove simultaneously further the CODcr in the waste water, for the qualified discharge of water outlet provides safeguard.Suspending biological filter is of a size of 15.0m * 15.0m * 4.4m (H), and available depth is 4.1m, name residence time 14.7h.
Wherein polyurethane foam carrier adopts urethane raw, and its component is: polyester polyol 90 weight parts, polymer polyatomic alcohol 20 weight parts, isocyanic ester 90 weight parts, water 3 weight parts, catalyzer 0.3 weight part, whipping agent 20 weight parts, suds-stabilizing agent 2 weight parts.Catalyzer is stannous octoate and dimethyl benzylamine, and whipping agent is water and fluoro trichloromethane, and suds-stabilizing agent is a silicone oil 580.
Embodiment 1:
COD mean value 2200mg/L, ammonia nitrogen mean value is 150mg/L, suspended substance mean value is that the synthetic leather wastewater of 2100mg/L enters grid, grease removal tank, equalizing tank, coagulative precipitation tank successively, remove thicker foreign material by grid, grease removal tank is removed oleaginous materials, the sulphur removal of equalizing tank air aeration, coagulative precipitation tank is removed most suspended substances and colloidal materials; The coagulating sedimentation water outlet enters hydrolysis acidification pool, oxygen compatibility pool, balancing reservoir, second pond, suspending biological filter successively, the suspending biological filter water part is back to oxygen compatibility pool, the second pond sludge part is back to hydrolysis acidification pool, all the other mud are transported outward after concentrating filter-press dehydration, balancing reservoir adds the ferrous sulfate of 0.1g/L, suspending biological filter is added to 0.04% total nitrifier of handling wastewater flow rate, it is the polyurethane foam carrier of 0.2mm that oxygen compatibility pool adopts the aperture, and the polyurethane foam carrier dosage is 30% of oxygen compatibility pool pond appearance.It is the polyurethane foam carrier of 0.1mm that suspending biological filter adopts the aperture, and the polyurethane foam carrier dosage is 30% of suspending biological filter pond appearance, and the pH of hydrolysis acidification pool is 6.5, and the pH of oxygen compatibility pool is 7, and the pH of balancing reservoir is 6, and the pH of suspending biological filter is 7; The dissolved oxygen of hydrolysis acidification pool is 0.1mg/L, and the dissolved oxygen of oxygen compatibility pool is 0.2mg/L, the dissolved oxygen 2mg/L of balancing reservoir, the dissolved oxygen 2mg/L of suspending biological filter.
Embodiment 2:
COD mean value 2600mg/L, ammonia nitrogen mean value is 120mg/L, suspended substance mean value is that the synthetic leather wastewater of 1800mg/L enters grid, grease removal tank, equalizing tank, coagulative precipitation tank successively, remove thicker foreign material by grid, grease removal tank is removed oleaginous materials, the sulphur removal of equalizing tank air aeration, coagulative precipitation tank is removed most suspended substances and colloidal materials; The coagulating sedimentation water outlet enters hydrolysis acidification pool, oxygen compatibility pool, balancing reservoir, second pond, suspending biological filter successively, the suspending biological filter water part is back to oxygen compatibility pool, the second pond sludge part is back to hydrolysis acidification pool, all the other mud are transported outward after concentrating filter-press dehydration, balancing reservoir adds the ferrous sulfate of 0.4g/L, suspending biological filter is added to 0.05% total nitrifier of handling wastewater flow rate, it is the polyurethane foam carrier of 0.2mm that oxygen compatibility pool adopts the aperture, and the polyurethane foam carrier dosage is 40% of oxygen compatibility pool pond appearance.It is the polyurethane foam carrier of 0.1mm that suspending biological filter adopts the aperture, and the polyurethane foam carrier dosage is 40% of suspending biological filter pond appearance, and the pH of hydrolysis acidification pool is 6.5, and the pH of oxygen compatibility pool is 7, and the pH of balancing reservoir is 6, and the pH of suspending biological filter is 7; The dissolved oxygen of hydrolysis acidification pool is 0.1mg/L, and the dissolved oxygen of oxygen compatibility pool is 0.2mg/L, the dissolved oxygen 2mg/L of balancing reservoir, the dissolved oxygen 2mg/L of suspending biological filter.
Embodiment 3:
COD mean value 2930mg/L, ammonia nitrogen mean value is 220mg/L, suspended substance mean value is that the synthetic leather wastewater of 1800mg/L enters grid, grease removal tank, equalizing tank, coagulative precipitation tank successively, remove thicker foreign material by grid, grease removal tank is removed oleaginous materials, the sulphur removal of equalizing tank air aeration, coagulative precipitation tank is removed most suspended substances and colloidal materials; The coagulating sedimentation water outlet enters hydrolysis acidification pool, oxygen compatibility pool, balancing reservoir, second pond, suspending biological filter successively, the suspending biological filter water part is back to oxygen compatibility pool, the second pond sludge part is back to hydrolysis acidification pool, all the other mud are transported outward after concentrating filter-press dehydration, balancing reservoir adds the ferrous sulfate of 0.7g/L, suspending biological filter is added to 0.07% total nitrifier of handling wastewater flow rate, it is the polyurethane foam carrier of 0.2mm that oxygen compatibility pool adopts the aperture, and the polyurethane foam carrier dosage is 50% of oxygen compatibility pool pond appearance.It is the polyurethane foam carrier of 0.2mm that suspending biological filter adopts the aperture, and the polyurethane foam carrier dosage is 50% of suspending biological filter pond appearance, and the pH of hydrolysis acidification pool is 6.5, and the pH of oxygen compatibility pool is 7, and the pH of balancing reservoir is 6, and the pH of suspending biological filter is 7; The dissolved oxygen of hydrolysis acidification pool is 0.1mg/L, and the dissolved oxygen of oxygen compatibility pool is 0.2mg/L, the dissolved oxygen 3mg/L of balancing reservoir, the dissolved oxygen 3mg/L of suspending biological filter.
Embodiment 4:
COD mean value 3400mg/L, ammonia nitrogen mean value is 320mg/L, suspended substance mean value is that the synthetic leather wastewater of 2500mg/L enters grid, grease removal tank, equalizing tank, coagulative precipitation tank successively, remove thicker foreign material by grid, grease removal tank is removed oleaginous materials, the sulphur removal of equalizing tank air aeration, coagulative precipitation tank is removed most suspended substances and colloidal materials; The coagulating sedimentation water outlet enters hydrolysis acidification pool, oxygen compatibility pool, balancing reservoir, second pond, suspending biological filter successively, the suspending biological filter water part is back to oxygen compatibility pool, the second pond sludge part is back to hydrolysis acidification pool, all the other mud are transported outward after concentrating filter-press dehydration, balancing reservoir adds the ferrous sulfate of 1.5g/L, suspending biological filter is added to 0.1% total nitrifier of handling wastewater flow rate, it is the polyurethane foam carrier of 0.5mm that oxygen compatibility pool adopts the aperture, and the polyurethane foam carrier dosage is 70% of oxygen compatibility pool pond appearance.It is the polyurethane foam carrier of 0.3mm that suspending biological filter adopts the aperture, the polyurethane foam carrier dosage is 70% of suspending biological filter pond appearance, and the pH of hydrolysis acidification pool is 7.5, and the pH of oxygen compatibility pool is 7.5, the pH of balancing reservoir is 8, and the pH of suspending biological filter is 8.2; The dissolved oxygen of hydrolysis acidification pool is 0.3mg/L, and the dissolved oxygen of oxygen compatibility pool is 0.4mg/L, the dissolved oxygen 4mg/L of balancing reservoir, the dissolved oxygen 4mg/L of suspending biological filter.
Claims (7)
1. leather making integrated waste water treatment method, it is characterized in that, synthetic leather wastewater enters grid, grease removal tank, equalizing tank, coagulative precipitation tank successively, remove thicker foreign material by grid, grease removal tank is removed oleaginous materials, the sulphur removal of equalizing tank air aeration, coagulative precipitation tank is removed most suspended substances and colloidal materials; The coagulating sedimentation water outlet enters hydrolysis acidification pool, oxygen compatibility pool, balancing reservoir, second pond, suspending biological filter successively, the suspending biological filter water part is back to oxygen compatibility pool, the second pond sludge part is back to hydrolysis acidification pool, all the other mud are transported outward after concentrating filter-press dehydration, balancing reservoir adds the compound enzymatic agent of iron content, suspending biological filter adds nitrifier, oxygen compatibility pool and suspending biological filter adopt polyurethane foam carrier, the pH of hydrolysis acidification pool is 6.5～7.5, the pH of oxygen compatibility pool is 7～7.5, the pH of balancing reservoir is 6～8, and the pH of suspending biological filter is 7～8.2; The dissolved oxygen of hydrolysis acidification pool is 0.1～0.3mg/L, and the dissolved oxygen of oxygen compatibility pool is 0.2～0.4mg/L, the dissolved oxygen 2～4mg/L of balancing reservoir, the dissolved oxygen 2～4mg/L of suspending biological filter.
2. a kind of leather making integrated waste water treatment method according to claim 1 is characterized in that, the compound enzymatic agent dosage of described iron content is 0.1～1.5g/L.
3. a kind of leather making integrated waste water treatment method according to claim 1 is characterized in that, the compound enzymatic agent of described iron content is a molysite.
4. a kind of leather making integrated waste water treatment method according to claim 3 is characterized in that, described molysite is ferrous sulfate, poly-iron or contains iron complexes.
5. a kind of leather making integrated waste water treatment method according to claim 1 is characterized in that, described nitrifier dosage is for handling 0.04～0.1% of synthetic leather wastewater Total Water.
6. a kind of leather making integrated waste water treatment method according to claim 1 is characterized in that, it is the polyurethane foam carrier of 0.2～0.5mm that described oxygen compatibility pool adopts the aperture, the 30-70% that the polyurethane foam carrier dosage holds for the oxygen compatibility pool pond.
7. a kind of leather making integrated waste water treatment method according to claim 1, it is characterized in that, it is the polyurethane foam carrier of 0.1～0.3mm that described suspending biological filter adopts the aperture, the 30-70% that the polyurethane foam carrier dosage holds for the suspending biological filter pond.
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| CN101830609A (en) * | 2010-05-28 | 2010-09-15 | 浙江大学 | Method for removing ammonia nitrogen from artificial leather manufacturing waste water |
| CN101857344A (en) * | 2010-06-13 | 2010-10-13 | 华南理工大学 | Method for treating domestic sewage by applying light ceramic suspended filler moving bed |
| CN102174253A (en) * | 2011-01-29 | 2011-09-07 | 浙江省环境保护科学设计研究院 | Preparation method and application of porous hydrophilic denitrification biological carrier |
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| CN103224309A (en) * | 2013-04-25 | 2013-07-31 | 西华大学 | Leather waste water treatment system and treatment process |
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| CN101830609A (en) * | 2010-05-28 | 2010-09-15 | 浙江大学 | Method for removing ammonia nitrogen from artificial leather manufacturing waste water |
| CN101830609B (en) * | 2010-05-28 | 2011-08-17 | 浙江大学 | Method for removing ammonia nitrogen from artificial leather manufacturing waste water |
| CN101857344A (en) * | 2010-06-13 | 2010-10-13 | 华南理工大学 | Method for treating domestic sewage by applying light ceramic suspended filler moving bed |
| CN101857344B (en) * | 2010-06-13 | 2011-12-21 | 华南理工大学 | Method for treating domestic sewage by applying light ceramic suspended filler moving bed |
| CN102174253A (en) * | 2011-01-29 | 2011-09-07 | 浙江省环境保护科学设计研究院 | Preparation method and application of porous hydrophilic denitrification biological carrier |
| CN102674639A (en) * | 2012-06-07 | 2012-09-19 | 故城县海青皮草有限公司 | Treatment process and treatment device of mink skin tanning waste water |
| CN102964026A (en) * | 2012-11-02 | 2013-03-13 | 黄文龙 | Shunt process for wastewater pretreatment |
| CN102964026B (en) * | 2012-11-02 | 2015-07-29 | 黄文龙 | Sewage disinfection treatment shunting process |
| CN102923918A (en) * | 2012-11-23 | 2013-02-13 | 佛山市水业集团有限公司 | Method and device for removing high concentration ammonia nitrogen in drinking water |
| CN103224309B (en) * | 2013-04-25 | 2014-06-25 | 西华大学 | Leather waste water treatment system and treatment process |
| CN103224309A (en) * | 2013-04-25 | 2013-07-31 | 西华大学 | Leather waste water treatment system and treatment process |
| CN103588364A (en) * | 2013-12-02 | 2014-02-19 | 宁夏西部皮草有限公司 | Method and system for recycle of woolfell tanning waste water |
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