CN104829011A - Method for deep phosphorus removal for phosphorus-containing sewage - Google Patents
Method for deep phosphorus removal for phosphorus-containing sewage Download PDFInfo
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- CN104829011A CN104829011A CN201510262587.8A CN201510262587A CN104829011A CN 104829011 A CN104829011 A CN 104829011A CN 201510262587 A CN201510262587 A CN 201510262587A CN 104829011 A CN104829011 A CN 104829011A
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Abstract
The invention relates to a method for deep phosphorus removal for phosphorus-containing sewage. The method comprises the following steps: sewage enters a raw water pool to be homogenized and water sequentially passes through a raw water self-cleaning filter, a raw water ultrafiltration system, a raw water middle water tank, a security filter and a reverse osmosis system, and water treated by the reverse osmosis system directly enters a mixed water tank; reverse osmosis concentrated water, backwashing drainage of the self-cleaning filter and drainage of a concentrated water ultrafiltration system enter a backwashing water collecting pool to be homogenized; coagulating sedimentation treatment on the water homogenized in coagulative precipitation tank is carried out; the treated water sequentially passes through a concentrated water middle water tank, a concentrated water self-cleaning filter and the concentrated ultrafiltration system, water produced by the concentrated ultrafiltration system further enters the mixed water tank, and after the water produced by the reverse osmosis system is mixed with the water produced by the concentrated ultrafiltration system in the mixed water tank, the total phosphorus is reduced to 0.1-0.2mg/l and the water is directly used as scenic water or replenishing water. The total phosphorus of effluent treated by the method provided by the invention is below 0.2mg/l and the water is directly used as scenic water or replenishing water, so that the water eutrophication can be effectively prevented.
Description
Technical field
The present invention relates to the method for deep phosphorous removal, specifically a kind of method being applicable to the phosphorus-containing wastewater deep phosphorous removals such as sanitary sewage reuse water.
Background technology
Eutrophication refers to that the nutritive substance such as nitrogen, phosphorus needed for biology enters the slow flow water bodies such as river, lake in a large number, causes algae and other planktonic organism to breed rapidly, and water body dissolved oxygen amount declines, the phenomenon of fish and other biological mortality.Eutrophication makes water quality deterioration and smells as of rotten fish, and algae death simultaneously discharges the safe drinking water of Algae toxins harm surrounding area.In body eutrophication process and water, the content of total phosphorus (TP) is closely related.Research shows, effectively can be controlled the growth of Measures of Algae in Water Body, prevent the generation of eutrophication by the content (below 0.2mg/l) controlling phosphorus in water body.
Landscape water is the non-natural lake of closure mostly, and self-purification capacity is low, needs a large amount of moisturizing water sources.The reclaimed urban waste water water yield is stablized, and is that a kind of change of water quality amplitude is little, the unconventional water source of Absorbable organic halogens supply.By reclaimed urban waste water after advanced treatment, supply landscape water body can improve water resources effective rate of utilization, become the important channel increasing and safeguard waterscape facilities.But the total phosphorus in sanitary sewage reuse water is usually at about 0.5mg/l, the requirement of landscape water water cannot be met, also can increase the weight of the Eutrophic Extent of landscape water.
In general, Phosphorus in Domestic Wastewater with Pulverized exists with the form of orthophosphoric acid salt, poly-phosphate and organophosphorus.Poly-phosphate can be hydrolyzed to orthophosphoric acid salt in acid condition, the effect of bacterium living beings enzyme in water, greatly can accelerate its hydrolysis process; Organophosphorus in sewage is bacterially decomposed and also can be changed to positive phosphoric acid salt.So in dephosphorization process, the main removal paying close attention to orthophosphoric acid salt.In sanitary sewage disposal, the main phosphorus removing method used has biological process, chemical method.
Biological process dephosphorization is the principle based on polyP bacteria picked-up and release phosphorus under aerobic and anaerobic condition, replaces by Aerobic-anaerobic environment the method realizing dephosphorization.But biological process dephosphorization is very strong to organic concentration dependency in waste water, when in waste water, organic content is lower, or phosphorus content more than 10mg/L time, water outlet is difficult to the emission standard meeting phosphorus, often needs to adopt chemical method to carry out secondary dephosphorization process to water outlet.
Chemical method dephosphorization is the method carrying out dephosphorization with the phosphorus reaction generation flocculation sediment in chemical reagent and waste water.Use that maximum precipitation agents is calcium salt, molysite, aluminium salt and develop now inorganic-organic hybrid cationic flocculant etc. faster, iron-based flocculating agent is one of conventional dephosphorization reagent.But flocculation sediment technique is not suitable for containing the lower sewage of phosphorus concentration, and be difficult to ensure that stable water outlet is at below 0.5mg/l.
At present, in China's sanitary sewage emission standard, total phosphorous is 0.5mg/l, and a lot of Sewage Plant cannot qualified discharge, also cannot reach the moisturizing of below 0.2mg/l for landscape water body even if up to standard.In sanitary sewage reuse water, COD and total phosphorus concentration are all very low, and traditional biological phosphate-eliminating and chemical dephosphorization technique are not all suitable for its deep phosphorous removal technique.In order to reduce the total phosphorus concentration in sanitary sewage reuse water, for the moisturizing of landscape water body, preventing the frequent generation of landscape water eutrophication, needing a kind of deep phosphorous removal technique being applicable to reclaimed urban waste water of exploitation badly.
Summary of the invention
The object of this invention is to provide the method that one is applicable to the deep phosphorous removal of the phosphorus-containing wastewaters (COD < 20mg/l, 2mg/l > TP > 0.2mg/l) such as sanitary sewage reuse water.
The technical solution used in the present invention is for achieving the above object:
A kind of method of phosphorus-containing wastewater deep phosphorous removal: phosphorus-containing wastewater enters former pond and carries out homogeneous, after homogeneous, water is successively through former water self-cleaning filter, former water ultrafiltration system, former water intermediate water tank, cartridge filter and reverse osmosis system, produces water directly enter mixing tank through reverse osmosis system process; The dense water that reverse osmosis system produces, self-cleaning filtering backwash draining and the draining of dense water ultrafiltration system enter backwash water collecting tank homogeneous, after homogeneous in coagulative precipitation tank coagulating kinetics, dense water intermediate water tank, dense water self-cleaning filter and the process of dense water ultrafiltration system is flowed through successively after process, product water after process is also entered mixing tank, reverse osmosis system in mixing tank produces water total phosphorus after mixing through the product water of dense water ultrafiltration system process and is down to 0.1-0.2mg/l, will be directly used in the landscape water or moisturizing that prevent landscape water eutrophication.Phosphorus-containing wastewater of the present invention is life regeneration effluent water or Hu Deng water source, river.
Described former water self-cleaning filter and dense water self-cleaning filter adopt gas, the mode of water backwashing carries out corresponding cleaning; The backwash water of its Central Plains water self-cleaning filter produces water extraction confession by former water ultrafiltration system, and the backwash water of dense water self-cleaning filter is provided by mixing tank.
Described former water self-cleaning filter and dense water self-cleaning filter lay the water-distributing device of the double-layer filter material combined by porous plate and filter cap; The upper strata filtrate of water-distributing device is the hard coal of thick 0.4-0.6m, particle diameter 0.8-1.8mm, and thick 0.3-0.6m layer of sand is laid by lower floor, particle diameter 0.5-1.2mm.Upper strata macrobead anthracite coal measure retains principal pollutant, and lower floor's layer of sand retains contaminant remaining; Filtrate nonuniformity coefficient <1.4, filtering velocity 6-12m/h, work period 8-12 hour.
Described ultrafiltration system and dense water ultrafiltration system all adopt the ultra-filtration membrane of membrane pore size 50-100nm; Ultrafiltration system working pressure 0.1-0.6MPa, temperature 10-25 DEG C, membrane flux 1-5m
3/ (m
2d).
Described reverse osmosis system adopts aperture to be the reverse osmosis membrane of 0.8-1nm; Its working pressure 2 ~ 10MPa, temperature 10-25 DEG C, membrane flux 0.1-2.5m
3/ (m
2d).
Described coagulative precipitation tank is advection flocculation sedimentation tank, available depth 3 ~ 4m, temperature 10-25 DEG C, residence time 1-3 hour, mean flow rate 10-30mm/s; Wherein, the stirring velocity ladder value 20-80S of coagulation
-1, residence time 10-30 minute, temperature 10-25 DEG C.
The aqueous solution of the inorganic flocculating agent of mass concentration 50-200mg/l is added in described coagulative precipitation tank.
Described cartridge filter filtering accuracy is 3 ~ 8 μm, adopts high-quality polypropylene spray welding filter element, changes when strainer inlet outlet pressure differential is greater than set(ting)value.Cartridge filter adopts stainless steel shell, and vent valve is established at top.
Inorganic flocculating agent (any one of Tai-Ace S 150, aluminum chloride, ferric sulfate, iron(ic) chloride)
Concrete deep dephosphorization method, as shown in Figure 1:
1. pending former water enters former pond, and the water outlet after homogeneous, all amount enters former water self-cleaning filter after pump promotes, larger suspended substance residual in the trap water of self-cleaning filtering pond.
Wherein, self-cleaning filter is along with the prolongation of working time, and filter material layer is dirty stifled gradually, now needs to carry out gas, water backwashing to self-cleaning filter; The waste water that backwash filter produces is through collecting, stand-by.
2. the water outlet of former water self-cleaning filter enters former water ultrafiltration system; Under the efficient crown_interception of ultra-filtration membrane, small suspended substance, bacterium, virus etc. in waste water are removed, and make ultrafiltration produce water and enter former water intermediate water tank.
3. ultra-filtration water is after the former water intermediate water tank adding Scale inhibitors, reductive agent and non oxidizing bactericide (described each reagent can adopt record of the prior art) processes, enter cartridge filter, the water outlet of cartridge filter enters reverse osmosis membrane system through high-pressure pump pressurization, reverse osmosis membrane can remove various ions, inorganics and small organic molecule etc. in water effectively, system recoveries rate 60 ~ 80%, reverse osmosis produced water enters mixing tank reverse osmosis concentrated water and enters backwash water collecting tank.
Described ultra-filtration membrane and reverse osmosis membrane are subject to dirty stifled, when water production rate declines gradually, (ultrafiltration system producing water ratio declines more than 25%, reverse osmosis system producing water ratio declines more than 15%) adopt the medicaments such as acid, alkali to carry out matting to membrane element, the wastewater collection after cleaning converges to backwash water collecting tank.
4. the backwash draining of above-mentioned self-cleaning filter imports backwash water collecting tank homogeneous and all measures together with reverse osmosis concentrated water, and water outlet is promoted to coagulative precipitation tank through pump; Coagulating kinetics removes phosphorus wherein and suspended substance.Mud mixed liquid and supernatant liquor is obtained after coagulating sedimentation.
Wherein, mud mixed liquid enters sludge tank through pump lifting and keeps in, and the excess sludge with advanced sewage treatment system transports outward process.
5. coagulative precipitation tank supernatant liquor enters dense water intermediate water tank, enters dense water self-cleaning filter carry out pre-treatment through pump lifting.Pretreated water outlet enters dense water ultrafiltration system, through the efficient crown_interception of ultra-filtration membrane wherein, removes the small suspended substance in water outlet and phosphoric acid salt further.And then make pending former water after mixing in the product water of reverse osmosis system and the product water remittance mixing tank of dense water ultrafiltration system, 0.1-0.2mg/l is down to by mixing water total phosphorus, can be used for the occasion that landscape water moisturizing etc. is higher to total phosphorus concentration requirement, can the generation of eutrophication of anti-water-stop body.
Wherein, dense water self-cleaning filter is along with the prolongation of working time, and filter material layer is dirty stifled gradually, now needs to carry out gas, water backwashing to self-cleaning filter; The backwash water of dense water self-cleaning filter is provided by mixing tank; The waste water that backwash filter produces, through collecting, converges to backwash water collecting tank as backwash draining.
The filter membrane of described dense water ultrafiltration system is subject to dirty stifled, and when water production rate decrease beyond 25% gradually, (the usual cycle is 3-6 month) adopts the medicaments such as acid, alkali to carry out matting to membrane element, and the wastewater collection remittance after cleaning is to backwash water collecting tank.
Dephosphorization principle of the present invention: phosphorus-containing wastewater combines after process through filter tank, ultrafiltration system and reverse osmosis system, because the phosphorus in water is not by reverse osmosis membrane, (accounting for total Water 75%) total phosphorus < 0.01mg/l of the water that reverse osmosis system produces can ignore.The phosphorus being subject to reverse osmosis membrane deadening is enriched to be accounted in the dense water of total Water 25%, and the total phosphorus concentration in dense water is four times of total phosphorus concentration in former water.Dense water enters flocculation sedimentation tank, and through flocculation sediment dephosphorization, in flocculation water outlet, phosphorus content is down to below 0.5mg/l.Dense water after flocculation dephosphorization (accounts for total Water 25%, total phosphorus < 0.5mg/l) remove after suspended contaminant after filtration and (account for total Water 75% with reverse osmosis produced water, total phosphorus < 0.01mg/l) mixing, mixing water total phosphorus can be controlled in below 0.2mg/l, reaches the requirement of landscape water water.
The advantage that the present invention has: the method for dephosphorization of the present invention is applicable to sanitary sewage reuse water, river or lake water (chemical oxygen demand COD < 20mg/l, total phosphorus TP > 0.2mg/l), in the rear water outlet of process, total phosphorus is at below 0.2mg/l, as landscape water source water and moisturizing water source, the generation of body eutrophication effectively can be prevented.
Accompanying drawing explanation
The schema that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with embodiment, respective description is carried out to the present invention, but the present invention is not limited to these embodiments.
Embodiment 1
Certain hotel sewage treatment plant reuse water, total phosphorous 1.0-1.5mg/L, COD8-12mg/L, the average water yield 500 tons/day.
Concrete treatment step is:
1. pending former water enters former pond (590m
3/ d) even water quality, the water yield, water outlet enters former water self-cleaning filter (590m after pump promotes
3/ d), larger suspended substance residual in trap water.Former water self-cleaning filter lays the water-distributing device of the double-layer filter material combined by porous plate and filter cap, and upper strata filtrate is the hard coal of thick 0.6m, particle diameter 1.2mm, at the thick 0.4m layer of sand of its lower laying, and particle diameter 0.6mm, filtering velocity 6m/h.Filtering basin are along with the prolongation of working time, and filter material layer is dirty stifled gradually, needs within every 12 hours, carry out gas, water backwashing once to self-cleaning filter; The waste water that backwash filter produces imports backwash water collecting tank through collecting.
2. the water outlet of former water self-cleaning filter enters ultrafiltration system (590m
3/ d), ultrafiltration system adopts domestic membrane module, the ultra-filtration membrane of membrane pore size 50-80nm, ultrafiltration system working pressure 0.2-0.5MPa, temperature 10-25 DEG C, membrane flux 3-5m
3/ (m
2d).Under the efficient crown_interception of ultra-filtration membrane, small suspended substance, bacterium, virus etc. in waste water are removed, and make ultrafiltration produce water and enter former water intermediate water tank, former pond is got back in ultrafiltration system draining.
3. ultra-filtration water is after the former water intermediate water tank adding Scale inhibitors, reductive agent and non oxidizing bactericide processes, and enters cartridge filter, and the water outlet of cartridge filter enters reverse osmosis membrane system (535m through high-pressure pump pressurization
3/ d); Reverse osmosis system employing aperture is the import reverse osmosis membrane of 0.8-1nm, its working pressure 2 ~ 8MPa, temperature 10-25 DEG C, membrane flux 0.15-2.5m
3/ (m
2d); Reverse osmosis membrane can remove various ions, inorganics and small organic molecule etc. in water effectively, and system recoveries rate 75%, produces water (400m up to standard after reverse osmosis system process
3/ d), produce total phosphorous 0.01-0.02mg/L in water, directly import mixing tank, reverse osmosis concentrated water (135m
3/ d) enter backwash water collecting tank (150m
3/ d) process further, dense water total phosphorous 4.0-6.0mg/L.
Described ultra-filtration membrane and reverse osmosis membrane are subject to dirty stifled, when water production rate declines gradually, (ultrafiltration system producing water ratio declines more than 25%, reverse osmosis system producing water ratio declines more than 15%), secure ph equal 2 citric acid solution (2%wt) or the pH value sodium hydroxide solution (0.1%) that equals 12 medicine cleaning is carried out to filter membrane, and add 50ppm hydrogen peroxide and carry out circulation medicine again and wash or soak, wastewater collection after cleaning, stand-by.
4. the backwash draining of above-mentioned self-cleaning filter imports backwash water collecting tank (150m together with reverse osmosis concentrated water
3/ d) homogeneous all measures, and water outlet is promoted to through pump adds (150m in coagulative precipitation tank that concentration is the ferric chloride aqueous solutions of 50mg/L
3/ d); Coagulating kinetics removes phosphorus wherein and suspended substance.Mud mixed liquid (2m is obtained after coagulating sedimentation
3/ d) and supernatant liquor (150m
3/ d).
Wherein, mud mixed liquid enters sludge tank through pump lifting and keeps in, and the excess sludge with advanced sewage treatment system transports outward process.
5. coagulating sedimentation supernatant liquor enters dense water intermediate water tank, and (with former water self-cleaning filter, processing power is 150m to structure to enter dense water self-cleaning filter through pump lifting
3/ d) carry out pre-treatment.Pretreated water outlet enters dense water ultrafiltration system, and (with former water ultrafiltration system, processing power is 150m to dense water ultrafiltration system composition
3/ d), through the efficient crown_interception of ultra-filtration membrane wherein, remove the small suspended substance in water outlet and phosphoric acid salt further, make total phosphorous 0.45-0.62mg/L in water.
And then making pending former water import in mixing tank through the product water of reverse osmosis system and the product water of dense water ultrafiltration system, 0.08-0.16mg/l is down to by mixing water outlet total phosphorus, and total phosphorous is less than 0.2mg/L.Reuse water after process is used for hotel landscape lake moisturizing, and adopt after this technique in 2 years, man-made lake, in summer, eutrophication does not occur.
Wherein, dense water self-cleaning filter is along with the prolongation of working time, and filter material layer is dirty stifled gradually, and within every 12 hours, needs carry out gas, water backwashing to self-cleaning filter; The waste water that backwash filter produces converges to backwash water collecting tank through collecting.
The ultra-filtration membrane of described dense water ultrafiltration system is subject to dirty stifled, when water production rate decrease beyond 25% gradually, (the usual cycle is 3 months) adopts the medicaments such as acid, alkali to carry out matting to membrane element, cleaning agent is filled a prescription with former water ultrafiltration system cleaning agent, and the wastewater collection after cleaning is stand-by.
Waste water after described former water self-cleaning filter and dense water self-cleaning filter backwash draining, the draining of dense water ultrafiltration system and ultrafiltration system and the cleaning of reverse osmosis system filter membrane imports backwash water collecting tank as backwash water and re-starts process; The draining of former water ultrafiltration system directly enters former pond.
Embodiment 2
Certain community sewage plant sanitary sewage reuse water total phosphorous 0.8-1.0mg/L, COD 8-10mg/L, flow 600 tons/day, reverse osmosis system produces water total phosphorous 0.01-0.02mg/L.Reverse osmosis system dense water total phosphorous 3.0-4.0mg/L, adds flocculation agent aluminum chloride 40mg/L, total phosphorous 0.51-0.64mg/L after flocculation sedimentation tank, filter tank and ultrafiltration.Mixing water outlet total phosphorous 0.1-0.15mg/l is less than 0.2mg/L.River after process is used for landscape lake moisturizing, and adopt after this technique in 2 years, man-made lake, in summer, eutrophication does not occur.
Embodiment 3
Certain scenic spot sewage work of conference centre reuse water, the water yield 800 tons/day, total phosphorous 1.2-1.6mg/L, COD 8-18mg/L.After reverse osmosis system process, produce total phosphorous 0.01-0.02mg/L, reverse osmosis system dense water total phosphorous 4.4-6.5mg/L in water.Reverse osmosis concentrated water adds flocculation polymerize aluminum chloride 60mg/L, carries out flocculation sediment, total phosphorous 0.45-0.65mg/L in water after filter tank and ultrafiltration system are filtered.Water and reverse osmosis produced water mixing water outlet total phosphorus 0.10-0.15mg/l are produced in dense water ultrafiltration, and total phosphorous is less than 0.2mg/L.Reuse water after process is used for hotel landscape lake moisturizing, and adopt after this technique in 2 years, man-made lake, in summer, eutrophication does not occur.
Embodiment 4
Certain scenic spot sewage work of conference centre reuse water, the water yield 500 tons/day, total phosphorous 0.6-0.9mg/L, COD12-18mg/L.After reverse osmosis system process, produce total phosphorous 0.01-0.02mg/L, reverse osmosis system dense water total phosphorous 3.5-4.6mg/L in water.Reverse osmosis concentrated water adds flocculation poly-ferric chloride 50mg/L, carries out flocculation sediment, total phosphorous 0.42-0.46mg/L in water after filter tank and ultrafiltration system are filtered.Water and reverse osmosis produced water mixing water outlet total phosphorus 0.10-0.12mg/l are produced in dense water ultrafiltration, and total phosphorous is less than 0.2mg/L.Reuse water after process is used for hotel landscape lake moisturizing, and adopt after this technique in 1 year, man-made lake, in summer, eutrophication does not occur.
Claims (9)
1. the method for a phosphorus-containing wastewater deep phosphorous removal, it is characterized in that: phosphorus-containing wastewater enters former pond and carries out homogeneous, after homogeneous, water is successively through former water self-cleaning filter, former water ultrafiltration system, former water intermediate water tank, cartridge filter and reverse osmosis system, produces water directly enter mixing tank through reverse osmosis system process; The dense water that reverse osmosis system produces, self-cleaning filtering backwash draining and the draining of dense water ultrafiltration system enter backwash water collecting tank homogeneous, after homogeneous in coagulative precipitation tank coagulating kinetics, dense water intermediate water tank, dense water self-cleaning filter and the process of dense water ultrafiltration system is flowed through successively after process, product water after process is also entered mixing tank, reverse osmosis system in mixing tank produces water total phosphorus after mixing through the product water of dense water ultrafiltration system process and is down to 0.1-0.2mg/l, will be directly used in the landscape water or moisturizing that prevent landscape water eutrophication.
2. by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 1, it is characterized in that: described former water self-cleaning filter and dense water self-cleaning filter adopt gas, the mode of water backwashing carries out corresponding cleaning; The backwash water of its Central Plains water self-cleaning filter produces water extraction confession by former water ultrafiltration system, and the backwash water of dense water self-cleaning filter is provided by mixing tank.
3., by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 1, it is characterized in that: described former water self-cleaning filter and dense water self-cleaning filter lay the water-distributing device of the double-layer filter material combined by porous plate and filter cap.
4., by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 1, it is characterized in that: described former water ultrafiltration system and dense water ultrafiltration system all adopt the ultra-filtration membrane of membrane pore size 50-100nm; Ultrafiltration system working pressure 0.1-0.6MPa, temperature 10-25 DEG C, membrane flux 1-5m
3/ (m
2d).
5. by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 1, it is characterized in that: described reverse osmosis system adopts aperture to be the reverse osmosis membrane of 0.8-1nm; Its working pressure 2 ~ 10MPa, temperature 10-25 DEG C, membrane flux 0.1-2.5m
3/ (m
2d).
6., by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 1, it is characterized in that: described cartridge filter filtering accuracy is 3-8 μm.
7., by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 1, it is characterized in that: described coagulative precipitation tank is made up of flocculation sedimentation tank and coagulation basin; Wherein flocculation sedimentation tank is advection flocculation sedimentation tank, available depth 3 ~ 4m, temperature 10-25 DEG C, residence time 1-3 hour, mean flow rate 10-30mm/s; The stirring velocity ladder value 20-80S of coagulation basin
-1, residence time 10-30 minute, temperature 10-25 DEG C.
8. by the method for phosphorus-containing wastewater deep phosphorous removal according to claim 7, it is characterized in that: the aqueous solution adding the inorganic flocculating agent of mass concentration 50-200mg/l in described coagulative precipitation tank.
9., by the method for the phosphorus-containing wastewater deep phosphorous removal described in claim 1-8, it is characterized in that: described sewage is life regeneration effluent water, river or lake water.
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|---|---|---|---|
| CN201510262587.8A CN104829011A (en) | 2015-05-21 | 2015-05-21 | Method for deep phosphorus removal for phosphorus-containing sewage |
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|---|---|---|---|
| CN201510262587.8A CN104829011A (en) | 2015-05-21 | 2015-05-21 | Method for deep phosphorus removal for phosphorus-containing sewage |
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ID=53807271
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311161A (en) * | 2016-09-22 | 2017-01-11 | 东莞市联洲知识产权运营管理有限公司 | Efficient treatment method of phosphorus wastewater |
| CN108928948A (en) * | 2018-08-28 | 2018-12-04 | 山东禹王生态食业有限公司 | A kind of filter cleaning system |
| CN109626638A (en) * | 2018-12-24 | 2019-04-16 | 湖北兴发环保科技有限公司 | A kind for the treatment of process of high P content waste water Zero-discharge reuse |
| CN113926245A (en) * | 2021-11-02 | 2022-01-14 | 上海熊猫机械(集团)有限公司 | Direct drinking water equipment filter element service life judging and managing method |
-
2015
- 2015-05-21 CN CN201510262587.8A patent/CN104829011A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311161A (en) * | 2016-09-22 | 2017-01-11 | 东莞市联洲知识产权运营管理有限公司 | Efficient treatment method of phosphorus wastewater |
| CN108928948A (en) * | 2018-08-28 | 2018-12-04 | 山东禹王生态食业有限公司 | A kind of filter cleaning system |
| CN108928948B (en) * | 2018-08-28 | 2021-02-19 | 山东禹王生态食业有限公司 | Filter cleaning system |
| CN109626638A (en) * | 2018-12-24 | 2019-04-16 | 湖北兴发环保科技有限公司 | A kind for the treatment of process of high P content waste water Zero-discharge reuse |
| CN113926245A (en) * | 2021-11-02 | 2022-01-14 | 上海熊猫机械(集团)有限公司 | Direct drinking water equipment filter element service life judging and managing method |
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