CN105819538A - Method for using crosslinked polyvinylpyrrolidone supporter to absorb and purify ammonia-nitrogen wastewater - Google Patents

Method for using crosslinked polyvinylpyrrolidone supporter to absorb and purify ammonia-nitrogen wastewater Download PDF

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Publication number
CN105819538A
CN105819538A CN201610207965.7A CN201610207965A CN105819538A CN 105819538 A CN105819538 A CN 105819538A CN 201610207965 A CN201610207965 A CN 201610207965A CN 105819538 A CN105819538 A CN 105819538A
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crospolyvinylpyrrolidone
net cage
carrier
treatment zone
thermal treatment
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CN105819538B (en
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叶澄
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Zhejiang zhongkezhuyuan Ecological Technology Co.,Ltd.
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Hangzhou Qi Cheng Science And Technology Ltd
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Priority to CN201610207965.7A priority Critical patent/CN105819538B/en
Priority to CN201810281451.5A priority patent/CN108264123A/en
Priority to CN201810281449.8A priority patent/CN108502961A/en
Priority to CN201810281450.0A priority patent/CN108394951A/en
Priority to CN201810281421.4A priority patent/CN108383194A/en
Priority to CN201810281453.4A priority patent/CN108383195B/en
Publication of CN105819538A publication Critical patent/CN105819538A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
    • B01J20/267—Cross-linked polymers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/007—Modular design
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Sorption (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Abstract

The invention discloses a method for using a crosslinked polyvinylpyrrolidone supporter to absorb and purify ammonia-nitrogen wastewater. The method creatively utilizes the selective adsorbability of crosslinked polyvinylpyrrolidone to ammoniacal nitrogen in water, and a carbanyl group in the molecular structure can be compounded with an amino group to form a hydrogen-bond complex compound. Artificial zeolite containing crosslinked polyvinylpyrrolidone is mixed with domestic wastewater to sufficiently absorb ammoniacal nitrogen in the domestic wastewater, then crosslinked polyvinylpyrrolidone releases the absorbed ammoniacal nitrogen in a heating desorption manner, and the absorbed ammoniacal nitrogen is released in the form of ammonia gas.

Description

A kind of method of crospolyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
Technical field
A kind of method that the present invention relates to crospolyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water, belongs to the field of waste water treatment in environmental conservation.
Background technology
In recent years, along with improving constantly of China's cities and towns living standards of the people, the nitrogen content in urban life waste water steeply rises, and the arbitrarily discharge of increasing nitrogenous effluent causes harm greatly to environment.Nitrogen in waste water with organic nitrogen, ammoniacal nitrogen (NH4 +-N), nitrate nitrogen (NO3 --N) and nitrite nitrogen (NO2 --N) etc. various ways exist, and ammoniacal nitrogen is one of topmost existence form.Ammonia nitrogen in sanitary wastewater refers to the nitrogen existed with free ammonia and ion ammonium form, is mainly derived from food debris and washing sewage.The polluter of ammonia nitrogen is many, and discharge capacity is big, and the concentration change discharged is big.
From the perspective of environmental pollution, there is excess of ammonia nitrogen and dissolved oxygen concentration in water body can be caused to reduce, cause water body blackout smelly in water environment, deteriorating water quality, the existence to aquatic animals and plants impacts, and can cause body eutrophication.
At present, the technology that in sanitary wastewater, the utilization preferable, domestic of the process practicality of ammonia nitrogen is most is: biological denitrificaion method, ammonia aeration vaporizing extract process, break point chlorination, chemical precipitation method, ion exchange, liquid-film method, soil irrigation method etc..
(1) biological denitrificaion method: under aerobic condition, effect by aerobic nitrification bacterium, it is nitrite or nitrate by the ammonium oxidation in waste water, the most under anoxic conditions, utilizes denitrifying bacterium (denitrifier) to be nitrogen by nitrite and nitrate reduction and escape from waste water.
(2) ammonia aeration vaporizing extract process: stripping, vaporizing extract process are mainly used in removing useless gas dissolved water and some volatile substances.Will be passed through in water by gas, make gas be fully contacted mutually with aqueous phase, make gas dissolved water and volatile solutes through gas-liquid interface, shift to gas phase, thus reach to remove the purpose of pollutant.
(3) break point chlorination: break point chlorination is to be passed through chlorine in waste water to reach certain point, and in water, free chlorine contents is relatively low when this, and the concentration of ammonia reduces to zero.When chlorine intake exceedes this, the free chlorine in water will increase, and therefore, this point is referred to as break, and the chlorination under this state is referred to as breakpoint chlorination.
(4) chemical precipitation method: chemical precipitation method is to add Mg in waste water+And PO4 3-, it is allowed to generate indissoluble double salt MgNH with ammonia nitrogen4PO4*6H2O(is called for short MAP) crystallization, then make MAP separate from waste water by gravitational settling.
(5) ion exchange: the essence of ion exchange is the exchange reaction of the exchangeable ion on insoluble ionic compound (ion-exchanger) and other same sex ion in waste water, is a kind of special adsorption process, it is common that reversible chemical adsorbs.
(6) liquid-film method: it is that ammoniacal nitrogen is soluble in film phase that emulsion liquid membrane removes the mechanism of ammonia nitrogen, and it is from the outside of the high concentration of film, by the diffusive migration of film phase, arrives and occurs to solve dealkylation reaction, the NH of generation with the acid in interior boundary, with film internal phase inside film phase4 +Stable in film internal phase insoluble in oil phase, inside and outside film under the promotion of ammonia density difference, amino molecule is constantly by film surface adsorption, and diffusion migrates to desorbing inside film phase, thus reaches to separate the purpose removing ammonia nitrogen.
(7) soil irrigation method: soil irrigation is ammonia nitrogen waste water using low concentration (< 50mg/L) to be used as the fertilizer of crops, both provided stable water source for irrigating region agricultural, and turn avoid body eutrophication, and improve water utilization rate.But the waste water for soil irrigation has to pass through pretreatment, remove the harmful substances such as pathogenic bacteria, heavy metal, phenols, cyanide, oils.
There is the shortcomings such as cost height, technical sophistication, treatment effect instability due to above-mentioned traditional treatment method, therefore, it is necessary to break away from existing treatment technology thinking, hews out and process the new way of ammonia nitrogen in sanitary wastewater, and then develop NH3-N elimination method in the sanitary wastewater of a kind of new type.
Summary of the invention
nullFor solving the deficiencies in the prior art，A kind of method that the invention provides crospolyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water，It is characterized in that，After pH value regulation processes, the ammonia nitrogen waste water of (after process, pH value is 6.5 ~ 8.0) is by the inlet valve entrance system of crospolyvinylpyrrolidone carrier adsorption cleaning system lower left quarter，Described crospolyvinylpyrrolidone carrier adsorption cleaning system includes rustless steel cell body、Crospolyvinylpyrrolidone carrier net cage、Electronic net cage slide rail、Electrical heating coil、Inlet valve、Water discharging valve、Carrier net cage thermal treatment zone entrance、The carrier net cage thermal treatment zone exports、Condensing tube etc.，Cell body is fixedly arranged in the middle of a circle electronic net cage slide rail，10 crospolyvinylpyrrolidone carrier net cages are installed on electronic net cage slide rail at equal intervals，Cell body is arranged over the carrier net cage thermal treatment zone，Upper and lower both sides, the thermal treatment zone are respectively arranged with electrical heating coil，Crospolyvinylpyrrolidone carrier net cage is entered the thermal treatment zone by the entrance on the left of the thermal treatment zone，And the outlet through right side leaves the thermal treatment zone，Thermal treatment zone upper right quarter is provided with condensing tube，Cell body lower left quarter is provided with inlet valve，Upper right quarter is provided with water discharging valve；nullRotating clockwise at a slow speed made under the driving of electronic net cage slide rail by 10 crospolyvinylpyrrolidone carrier net cages，Waste water is made to be fully contacted with the permutite containing crospolyvinylpyrrolidone in carrier net cage，Crospolyvinylpyrrolidone can fully adsorb the ammoniacal nitrogen in waste water and portion of water，Adsorb the most saturated after crospolyvinylpyrrolidone carrier net cage prolong clockwise movement path and be raised to carrier net cage thermal treatment zone entrance，And enter inside the thermal treatment zone，Heating through electrical heating coil，Make crospolyvinylpyrrolidone generation thermal desorption，Ammoniacal nitrogen and the moisture of its absorption are discharged with the situation of ammonia-water vapor mixture body，Mixed gas is after the cooling of condensing tube，The water recovery that boiling point is higher is liquid water droplets，Heated district outlet return is in cell body，And the relatively low ammonia of boiling point will not be caught a cold and is condensed into liquid，And be to continue with keeping gas form to discharge through gas outlet，Crospolyvinylpyrrolidone carrier net cage after thermal desorption processes is regenerated，And prolong clockwise movement path and drop to inside cell body through exit, the carrier net cage thermal treatment zone，Again with waste water play adsorption，Waste water after native system purified treatment is discharged cell body by the water discharging valve of cell body upper right quarter，Enter next processing links.
Further, the cell body dischargeable capacity of crospolyvinylpyrrolidone carrier adsorption cleaning system is 350m3；Crospolyvinylpyrrolidone carrier net cage volume is 5.5m3, aperture is 12mm；The running voltage of electronic net cage slide rail is 380V, and rotating speed is 25min/ circle.
Further, crospolyvinylpyrrolidone carrier selects permutite as the support material of crospolyvinylpyrrolidone, and its crospolyvinylpyrrolidone mass content is 40.5%.
Further, the running voltage of the electrical heating coil of crospolyvinylpyrrolidone carrier adsorption cleaning system is 380V, and heating-up temperature can reach 225 DEG C；Condensing tube uses lithium bromide refrigerating agent, and refrigeration machine running voltage is 380V, and cryogenic temperature is up to 15 DEG C.
Further, the ammonia discharged through gas outlet processes in entering into pickling tower further.
It is an advantage of the current invention that:
(1) this method has broken away from existing sanitary wastewater ammonia nitrogen purified treatment principle, creative make use of crospolyvinylpyrrolidone (PVPP) to the Selective adsorption of ammoniacal nitrogen in water, carbonyl in its molecular structure can form hydrogen bond complex with amino chemical combination, permutite containing crospolyvinylpyrrolidone is mixed with sanitary wastewater, it is made fully to adsorb ammonia nitrogen therein, so that the sanitary wastewater containing ammonia nitrogen is purified, its ammonia nitrogen removal efficiency is up to 98.8%
(2) material that this method uses is permutite and crospolyvinylpyrrolidone (crospolyvinylpyrrolidone), both avirulences, thus eliminates the risk introducing the pollutant new, harm is bigger；Meanwhile, both materials are simple and easy to get, and low price greatly reduces system operation cost.
(3) this method principle is simple, and design and construction cost is relatively low, and treatment effect is preferable, and operation expense is the lowest, is conducive to popularization and application on a large scale.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of crospolyvinylpyrrolidone carrier adsorption cleaning system.
51-rustless steel cell body, 52-crospolyvinylpyrrolidone carrier net cage, 53-electronic net cage slide rail, 54-electrical heating coil, 55-inlet valve, 56-water discharging valve, 57-carrier net cage thermal treatment zone entrance, the outlet of the 58-carrier net cage thermal treatment zone, 59-condensing tube.
Detailed description of the invention
A kind of method of crospolyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water, after pH value regulation processes, the ammonia nitrogen waste water of (after process, pH value is 6.5 ~ 8.0) is by the inlet valve entrance system of crospolyvinylpyrrolidone carrier adsorption cleaning system lower left quarter, described crospolyvinylpyrrolidone carrier adsorption cleaning system, including rustless steel cell body 51, crospolyvinylpyrrolidone carrier net cage 52, electronic net cage slide rail 53, electrical heating coil 54, inlet valve 55, water discharging valve 56, carrier net cage thermal treatment zone entrance 57, carrier net cage thermal treatment zone outlet 58, condensing tube 59.Cell body is fixedly arranged in the middle of a circle electronic net cage slide rail 53,10 crospolyvinylpyrrolidone carrier net cages 52 are installed on electronic net cage slide rail 53 at equal intervals, cell body is arranged over the carrier net cage thermal treatment zone, upper and lower both sides, the thermal treatment zone are respectively arranged with electrical heating coil 54, crospolyvinylpyrrolidone carrier net cage 52 is entered the thermal treatment zone by the entrance 57 on the left of the thermal treatment zone, and the outlet 58 through right side leaves the thermal treatment zone, thermal treatment zone upper right quarter is provided with condensing tube 59, cell body lower left quarter is provided with inlet valve 55, and upper right quarter is provided with water discharging valve 56；nullAfter pH value regulation processes, the sanitary wastewater of (after process, pH value is 6.5 ~ 8.0) is entered inside cell body by the inlet valve 55 of crospolyvinylpyrrolidone carrier adsorption cleaning system 5 lower left quarter，Rotating clockwise at a slow speed made under the driving of electronic net cage slide rail 53 by 10 crospolyvinylpyrrolidone carrier net cages 52，Waste water is made to be fully contacted with the permutite containing crospolyvinylpyrrolidone in carrier net cage 52，Crospolyvinylpyrrolidone can fully adsorb the ammoniacal nitrogen in waste water and portion of water，Adsorb the most saturated after crospolyvinylpyrrolidone carrier net cage 52 prolong clockwise movement path and be raised to carrier net cage thermal treatment zone entrance 57，And enter inside the thermal treatment zone，Heating through electrical heating coil 54，Make crospolyvinylpyrrolidone generation thermal desorption，Ammoniacal nitrogen and the moisture of its absorption are discharged with the situation of ammonia-water vapor mixture body，Mixed gas is after the cooling of condensing tube 59，The water recovery that boiling point is higher is liquid water droplets，Heated district outlet 58 is back in cell body，And the relatively low ammonia of boiling point will not be caught a cold and is condensed into liquid，And be to continue with keeping gas form in gas outlet enters into the pickling tower 10 of next processing links，Crospolyvinylpyrrolidone carrier net cage 52 after thermal desorption processes is regenerated，And prolong clockwise movement path and export through the carrier net cage thermal treatment zone and drop to inside cell body at 58，Again with waste water play adsorption，Waste water after native system purified treatment is discharged cell body by the water discharging valve 56 of cell body upper right quarter，Enter next processing links.
Sanitary wastewater after being processed by native system, its ammonia nitrogen removal efficiency is up to 98.8%.

Claims (5)

  1. null1. the method with crospolyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water，It is characterized in that，After pH value regulation processes, the ammonia nitrogen waste water of (after process, pH value is 6.5 ~ 8.0) is by the inlet valve entrance system of crospolyvinylpyrrolidone carrier adsorption cleaning system lower left quarter，Described crospolyvinylpyrrolidone carrier adsorption cleaning system includes rustless steel cell body、Crospolyvinylpyrrolidone carrier net cage、Electronic net cage slide rail、Electrical heating coil、Inlet valve、Water discharging valve、Carrier net cage thermal treatment zone entrance、The carrier net cage thermal treatment zone exports、Condensing tube etc.，Cell body is fixedly arranged in the middle of a circle electronic net cage slide rail，10 crospolyvinylpyrrolidone carrier net cages are installed on electronic net cage slide rail at equal intervals，Cell body is arranged over the carrier net cage thermal treatment zone，Upper and lower both sides, the thermal treatment zone are respectively arranged with electrical heating coil，Crospolyvinylpyrrolidone carrier net cage is entered the thermal treatment zone by the entrance on the left of the thermal treatment zone，And the outlet through right side leaves the thermal treatment zone，Thermal treatment zone upper right quarter is provided with condensing tube，Cell body lower left quarter is provided with inlet valve，Upper right quarter is provided with water discharging valve；nullRotating clockwise at a slow speed made under the driving of electronic net cage slide rail by 10 crospolyvinylpyrrolidone carrier net cages，Waste water is made to be fully contacted with the permutite containing crospolyvinylpyrrolidone in carrier net cage，Crospolyvinylpyrrolidone can fully adsorb the ammoniacal nitrogen in waste water and portion of water，Adsorb the most saturated after crospolyvinylpyrrolidone carrier net cage prolong clockwise movement path and be raised to carrier net cage thermal treatment zone entrance，And enter inside the thermal treatment zone，Heating through electrical heating coil，Make crospolyvinylpyrrolidone generation thermal desorption，Ammoniacal nitrogen and the moisture of its absorption are discharged with the situation of ammonia-water vapor mixture body，Mixed gas is after the cooling of condensing tube，The water recovery that boiling point is higher is liquid water droplets，Heated district outlet return is in cell body，And the relatively low ammonia of boiling point will not be caught a cold and is condensed into liquid，And be to continue with keeping gas form to discharge through gas outlet，Crospolyvinylpyrrolidone carrier net cage after thermal desorption processes is regenerated，And prolong clockwise movement path and drop to inside cell body through exit, the carrier net cage thermal treatment zone，Again with waste water play adsorption，Waste water after native system purified treatment is discharged cell body by the water discharging valve of cell body upper right quarter，Enter next processing links.
  2. Method the most according to claim 1, it is characterised in that cell body dischargeable capacity is 350m3, its crospolyvinylpyrrolidone carrier net cage volume is 5.5m3, aperture is 12mm, and the running voltage of its electronic net cage slide rail is 380V, and rotating speed is 25min/ circle.
  3. Method the most according to claim 1, it is characterised in that crospolyvinylpyrrolidone carrier selects permutite as the support material of crospolyvinylpyrrolidone, and its crospolyvinylpyrrolidone mass content is 40.5%.
  4. Method the most according to claim 1, it is characterised in that the running voltage of electrical heating coil is 380V, heating-up temperature reaches 225 DEG C, and condensing tube uses lithium bromide refrigerating agent, and refrigeration machine running voltage is 380V, and cryogenic temperature is up to 15 DEG C.
  5. Method the most according to claim 1, it is characterised in that the ammonia discharged through gas outlet processes in entering into pickling tower further.
CN201610207965.7A 2016-04-06 2016-04-06 A kind of method with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water Active CN105819538B (en)

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Application Number Priority Date Filing Date Title
CN201610207965.7A CN105819538B (en) 2016-04-06 2016-04-06 A kind of method with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281451.5A CN108264123A (en) 2016-04-06 2016-04-06 A kind of method with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281449.8A CN108502961A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281450.0A CN108394951A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281421.4A CN108383194A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281453.4A CN108383195B (en) 2016-04-06 2016-04-06 Method for adsorbing and purifying ammonia nitrogen wastewater by using cross-linked polyvinylpyrrolidone supporter

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CN201610207965.7A CN105819538B (en) 2016-04-06 2016-04-06 A kind of method with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water

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CN201810281451.5A Division CN108264123A (en) 2016-04-06 2016-04-06 A kind of method with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281421.4A Division CN108383194A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281449.8A Division CN108502961A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281453.4A Division CN108383195B (en) 2016-04-06 2016-04-06 Method for adsorbing and purifying ammonia nitrogen wastewater by using cross-linked polyvinylpyrrolidone supporter
CN201810281450.0A Division CN108394951A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water

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CN201810281450.0A Withdrawn CN108394951A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201610207965.7A Active CN105819538B (en) 2016-04-06 2016-04-06 A kind of method with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281449.8A Withdrawn CN108502961A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281421.4A Withdrawn CN108383194A (en) 2016-04-06 2016-04-06 A method of with crosslinked polyvinylpyrrolidone carrier adsorption cleaning ammonia nitrogen waste water
CN201810281453.4A Active CN108383195B (en) 2016-04-06 2016-04-06 Method for adsorbing and purifying ammonia nitrogen wastewater by using cross-linked polyvinylpyrrolidone supporter

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105883965A (en) * 2016-05-13 2016-08-24 杭州启澄科技有限公司 Cross-linked polyvininylpolyrrolidone supporter adsorption and purification system

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