CN103553264B - Multistage-membrane-extraction biological integrated treatment system for processing high ammonia nitrogen in wastewater, and method thereof - Google Patents
Multistage-membrane-extraction biological integrated treatment system for processing high ammonia nitrogen in wastewater, and method thereof Download PDFInfo
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- CN103553264B CN103553264B CN201310403681.1A CN201310403681A CN103553264B CN 103553264 B CN103553264 B CN 103553264B CN 201310403681 A CN201310403681 A CN 201310403681A CN 103553264 B CN103553264 B CN 103553264B
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Abstract
The invention discloses a multistage-membrane-extraction biological integrated treatment system for processing high ammonia nitrogen in wastewater, and a method thereof. The multistage-membrane-extraction biological integrated treatment system comprises: a pre-processor provided with a first water inlet for the entrance of high ammonia nitrogen wastewater; a pH adjuster connected with a first water outlet of the pre-processor; a filter connected with a second water outlet of the pH adjuster through a pipeline; a multistage membrane extractor sequentially comprising a first-stage membrane extractor, a second-stage membrane extractor and a third-stage membrane extractor, wherein the first-stage membrane extractor is connected with a third water outlet of the filter, the first-stage membrane extractor, the above three membrane extractors are connected through a pipeline, an extraction membrane is arranged in each of the membrane extractors, and the extraction membrane parallels to the flow direction of the wastewater and an extracting liquid; and a biological integrated process connected with the first-stage membrane extractor, the second-stage membrane extractor and the third-stage membrane extractor respectively, and a water outlet of the third-stage membrane extractor is provided with an deammoniated water collector.
Description
Technical field
The present invention relates to ambient water quality field of purification, particularly the biological synthesis treatment system of high ammonia nitrogen and method in a kind of Using Multistage Membranes extraction wastewater.
Background technology
Nitrogen in waste water with organic nitrogen, ammonia-state nitrogen (NH
4 +-N), the various ways such as nitric nitrogen and nitrite nitrogen exists, and ammonia-state nitrogen is one of topmost existence form.The industry such as oil, chemical industry, food and pharmacy, and in city domestic sewage and percolate, the quantity discharged of ammonia nitrogen is all larger.Ammonia and nitrogen pollution source is many, and quantity discharged is large, and the change in concentration of discharge is large.According to statistics, 2012, the quantity discharged of national ammonia nitrogen in waste water was 610,000 tons; The quantity discharged of the ammonia nitrogen of urban life waste water is 137.9 ten thousand tons.There is excess of ammonia nitrogen in water surrounding and can cause many-sided harmful effect.
In waste water, the treatment technology of ammonia nitrogen is the heat subject that scholars studies always.Deamination method has a lot, and that industrially applies at present mainly contains blow-off method, break point chlorination method, ion exchange method etc.Break point chlorination method and ion exchange method are applicable to not containing the wastewater treatment of organic low-concentration ammonia-nitrogen.For the inorganic ammonia nitrogen waste water of high density, the more employing blow-off method of current industrial application, but the ammonium sulfate concentrations that the ammonia nitrogen that stripping process decreasing ratio is low, stripping goes out generates after absorbing is low, effectively cannot utilize and dispose difficulty, easily producing secondary pollution.
Based on the above, a kind of necessary property of research of the novel device and method for the treatment of ammonia nitrogen in waste water.
Summary of the invention
For the deficiencies in the prior art, the invention provides high ammonia nitrogen Using Multistage Membranes extraction biological synthesis process and recovery method in a kind of waste water.The Using Multistage Membranes abstraction technique that the present invention takes is the new isolation technique that membrane separating process and gold-liquid extraction process combine.Different from common gold-liquid extraction process, the mass transfer process of membrane extraction is carried out on the microporous membrane surface of bond breaker liquid phase and solvent phase.Extraction agent and feed liquid are in film surface contact, and mass transfer occurs, and this process does not exist dispersion and the polymerism of the drop in usual extraction process.
The invention provides a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, comprise, pretreater, described pretreater is offered the first water-in, described pretreater is entered by described first water-in containing high ammonia-nitrogen wastewater, described high ammonia-nitrogen wastewater ammonia-nitrogen content is 500mg/L ~ 10000mg/L, and described pretreater is also provided with the first water outlet; PH-meter, described pH-meter is connected with described first water outlet by pipeline, and described pH-meter is also provided with the second water outlet; Filtering treater, described filtering treater is connected with described second water outlet by pipeline, and described filtering treater also establishes the 3rd water outlet; Using Multistage Membranes extractor, comprises one-level film abstractor, secondary membrane extractor and three grades of film abstractors successively, and described one-level film abstractor is connected with described 3rd water outlet; Be connected by pipeline between film abstractor at different levels, and interiorly all establish spe membrane, described waste water and described extraction liquid are separated by described spe membrane, and described spe membrane put to described waste water and extract flow to parallel, described extraction liquid flows to contrary with described waste water in described Using Multistage Membranes treater, waste water flows through one-level film abstractor, secondary membrane extractor and three grades of film abstractors successively, after the process of described Using Multistage Membranes extractor, flows out from described three grades of film abstractor water outlets; Described extraction liquid flows through three grades of film abstractors, secondary membrane extractor and one-level film abstractor successively in described Using Multistage Membranes extractor, and the final dope containing ammonia nitrogen is recovered or again recycles; Biological synthesis treater, is connected for passing into the waste liquid flowed out from described one-level film abstractor, secondary membrane extractor and three grades of film abstractors with described one-level film abstractor, secondary membrane extractor and three grades of film abstractors by pipeline respectively; Wherein, in described Using Multistage Membranes extractor, every one-level film abstractor water outlet is equipped with switch valve for switching to the pipeline that every one-level film abstractor is connected with subordinate film abstractor or the pipeline be connected with described biological synthesis treater.
Preferably, described a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, wherein, establish grid or screen cloth in described pretreater, aperture is 2mm ~ 6mm, and described pretreater is for removing particle larger in waste water.
Preferably, described a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, wherein, alkali lye adding device and pH detecting unit is established in described pH-meter, described pH detecting unit is for detecting the pH value of waste water and detected result being fed back to described alkali lye adding device, described alkali lye adding device adds alkali lye to the waste water flowed through, described alkali lye is calcium hydroxide or sodium hydroxide solution, the waste water adding alkali lye detects through described pH detecting unit again, and the wastewater pH finally flowed out from described pH-meter is 10.5 ~ 11.5.
Preferably, described a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, wherein, described strainer is cloth bag type or disc filter.
Preferably, described a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, wherein, described extraction liquid is the dilute sulphuric acid of 10%-20%.Preferably, described extraction liquid concentration is 15%.
Preferably, described a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, wherein, described spe membrane is ceramic membrane through silane hydrophobically modified or R 1216/methacrylic acid second fat superhydrophobic films, described spe membrane mean pore size is 30-70nm, preferably, described spe membrane mean pore size is 50nm.
Preferably, described a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water, wherein, in described Using Multistage Membranes extractor, every one-level film abstractor water outlet is also provided with automatic detection unit for detecting ammonia nitrogen concentration in outflow waste water; Described one-level film abstractor is provided with extract flow outlet, and described extract flow exit is established ammonia nitrogen detector and flows to valve, and described extract flow outlet is connected with the extraction liquid flow ipe be located on described three grades of film abstractors respectively with containing ammonia nitrogen dope withdrawer.Described flow to valve lead to containing ammonia nitrogen dope withdrawer pipeline or lead to described three grades of film abstractors pipeline enclosure switch control method be: when after extraction liquid flows through three grades of film abstractors, secondary membrane extractor and one-level film abstractor successively, concentration is still less than set(ting)value (being generally 30%), described ammonia nitrogen dope flows back to the import of described one-level film abstractor through pipeline, again recycles; When after extraction, concentration is more than or equal to set(ting)value to extraction liquid, described ammonia nitrogen dope reclaims.
The present invention also provides a kind of biological comprehensive treatment processing high ammonia nitrogen in waste water, is realized by following steps: 1) containing high ammonia-nitrogen wastewater first through pretreater, get rid of in waste water in granular substance; 2) through 1) process after wastewater streams through described pH-meter, in described pH-meter by interpolation alkaline matter wastewater pH is adjusted to 10.5 ~ 11.5; 3) through 2) process after waste water again through described metre filter process; 4) high ammonia-nitrogen wastewater after filtering enters described Using Multistage Membranes extractor and extracts, when described waste water passes through inside spe membrane, amino molecule appears from membranous wall, absorbed by the extraction liquid outside wall, NH3-N in waste water is removed, after the process of one-level film abstractor, ammonia nitrogen removal frank can reach more than 50%; Described one-level film abstractor water outlet detects through automatic detection unit, if ammonia nitrogen concentration is lower than 200mg/L in described waste water, water outlet enters biological synthesis process, otherwise enters secondary membrane extractor; Similarly, if ammonia nitrogen concentration is lower than 200mg/L in described secondary membrane extractor water outlet waste water, water outlet then enters biological synthesis treater, otherwise enter three grades of film abstractors, whether only contain ammonia nitrogen according in waste water, described waste water is by entering described biological synthesis treater after described three grades of film abstractors or being recovered; Described extraction liquid flows through three grades of film abstractors, secondary membrane extractor and one-level film abstractor successively in described Using Multistage Membranes extractor, and the extraction liquid entrance that the final dope containing ammonia nitrogen was recovered or flow back into described three grades of film abstractors recycles.General after three grades of spe membrane process, ammonia nitrogen removal frank can reach more than 99% substantially; 5) waste water is after the process of Using Multistage Membranes extractor, flow out from described three grades of film abstractor water outlets, process further except ammoniacal liquor collector is collected or enters described biological processor described in entering, except ammonia nitrogen, whether also judge that the waste water reclamation after the process of described Using Multistage Membranes extractor still flows into described biological synthesis treater containing other compositions according in waste water, concrete determination methods is: when only containing ammonia nitrogen in waste water, can be recovered through described Using Multistage Membranes extractor process waste water; And when also containing other compositions in waste water except containing ammonia nitrogen, then the waste water after the process of described Using Multistage Membranes extractor flows into described biological synthesis treater and is further processed.
Super-hydrophobicity acid and alkali-resistance mould material and Using Multistage Membranes abstraction technique combine and are applied in the removal technique of ammonia nitrogen substances in waste water by the present invention, form Using Multistage Membranes extracting system, in conjunction with biological synthesis treatment technology, propose the brand-new thinking of high ammonia nitrogen substances process in a kind of waste water, obtain beneficial effect: 1) dispersion and the agglomeration process of Using Multistage Membranes extraction of the present invention owing to not having phase, extraction agent can be reduced at high ammonia-nitrogen wastewater middle entrainment loss mutually; 2) high ammonia-nitrogen wastewater phase and extraction liquid phase are separately in the flowing of film both sides, do not form the liquid-liquid two-phase flow of directly contact, the efficiency of extraction is greatly improved; 3) in Using Multistage Membranes extraction process, two-phase does single-phase flowing in film both sides respectively, makes the impact of process from " back-mixing " and the restriction of " liquid flooding " condition; 4) Using Multistage Membranes extraction process can play the advantage in chemical engineering unit operation preferably, improves the mass-transfer efficiency of process, can realize extraction at the same level and reextraction process, adopts extracted species carrier to promote migration etc.; 5) high ammonia-nitrogen wastewater phase and solvent phase film both sides exist simultaneously the immobilized liquid membrane similar to it can be avoided to operate in the losing issue of film internal solvent; 6) processing technological flow is succinct, and device layout is compact, and take up an area few, method is easy to operate, non-secondary pollution; 7) by process adjustment, to containing organic high-concentration ammonia nitrogenous wastewater, the concentration of ammonia nitrogen can be made to be reduced to the degree of appropriate biological process, thus to make the organic pollutant in waste water and ammonia nitrogen realize Synergistic degradation; 8) to the waste water not containing organic pollutant, directly isolated the ammonia nitrogen in waste water by film, Using Multistage Membranes extraction can concentrate and reclaim the ammonia in waste water again under the condition of normal temperature, normal pressure, and recycle ammonia nitrogen resource, the rate of recovery is high.
Accompanying drawing explanation
Fig. 1 is a kind of Using Multistage Membranes extraction biological synthesis treatment system schematic diagram processing high ammonia nitrogen in waste water of the present invention.
Embodiment
The present invention is described in further detail below, can implement according to this with reference to specification sheets word to make those skilled in the art.
A kind of Using Multistage Membranes extraction biological synthesis treatment system schematic diagram processing high ammonia nitrogen in waste water shown in composition graphs 1, lower citing is described.
Embodiment 1
Reason field percolate ammonia nitrogen concentration filled out by certain rubbish is 1000mg/L, particulate material in percolate is got rid of through grid filtration, subsequently successively through high-efficiency fiber filter and security personnel's frit, adopt lime by about percolate pH regulator to 10, enter the process of one-level spe membrane, under the effect of film both sides ammonia partial pressure difference, the ammonia nitrogen in waste water is with amino molecule NH
3form through film, and by acid absorb generate ammonium salt.Through detecting, one-level spe membrane water outlet ammonia nitrogen concentration drops to 360mg/L, then through the process of secondary spe membrane, ammonia nitrogen concentration drops to below 100mg/L, and after biological synthesis process, ammonia nitrogen concentration is reduced to below 5mg/L, and ammonia-nitrogen removal rate reaches 99.5%.
Embodiment 2
Certain pharmaceutical waste water ammonia nitrogen concentration average out to 5600mg/L, particulate material in percolate is got rid of through grid filtration, adopt sodium hydroxide by about percolate pH regulator to 11, filter through disc filter subsequently, enter the process of one-level spe membrane, under the effect of film both sides ammonia partial pressure difference, the ammonia nitrogen in waste water is with amino molecule NH
3form through film, and generated ammonium sulfate by sulfuric acid absorption.Through detecting, one-level spe membrane water outlet ammonia nitrogen concentration drops to 2200mg/L, then through the process of secondary spe membrane, ammonia nitrogen concentration drops to below 560mg/L, and through three grades of spe membrane process, ammonia nitrogen concentration drops to below 6mg/L, and ammonia-nitrogen removal rate reaches 99.9%.Be greater than 99% by Using Multistage Membranes extraction ammonia-nitrogen removal rate, process water per ton investment every day and be not more than 20,000, direct operating cost is not more than 5 yuan.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (7)
1. process a Using Multistage Membranes extraction biological synthesis treatment system for high ammonia nitrogen in waste water, it is characterized in that, comprise,
Pretreater, described pretreater is offered the first water-in, and enter described pretreater containing high ammonia-nitrogen wastewater by described first water-in, described pretreater is also provided with the first water outlet;
PH-meter, described pH-meter is connected with described first water outlet by pipeline, and described pH-meter is also provided with the second water outlet;
Filtering treater, described filtering treater is connected with described second water outlet by pipeline, and described filtering treater also establishes the 3rd water outlet;
Using Multistage Membranes extractor, comprises one-level film abstractor, secondary membrane extractor and three grades of film abstractors successively, and described one-level film abstractor is connected with described 3rd water outlet, be connected by pipeline between film abstractor at different levels, and interiorly all establish spe membrane, described waste water and extraction liquid are separated by described spe membrane, and described spe membrane put to described waste water and described extract flow to parallel, described extraction liquid flows to contrary with described waste water in described Using Multistage Membranes extractor, described extraction liquid is the dilute sulphuric acid of 10%-15%, described spe membrane is ceramic membrane through silane hydrophobically modified or R 1216/methacrylic acid second fat superhydrophobic films, described spe membrane mean pore size is 30-70nm, in described Using Multistage Membranes extractor, every one-level film abstractor water outlet is also provided with automatic detection unit for detecting ammonia nitrogen concentration in outflow waste water, described one-level film abstractor is provided with extract flow outlet, and described extract flow exit is established ammonia nitrogen detector and flows to valve, and described extract flow outlet is connected with the extraction liquid flow ipe be located on described three grades of film abstractors respectively with containing ammonia nitrogen dope withdrawer,
Biological synthesis treater, is connected for passing into the waste liquid flowed out from described one-level film abstractor, secondary membrane extractor and three grades of film abstractors with described one-level film abstractor, secondary membrane extractor and three grades of film abstractors by pipeline respectively;
Wherein, in described Using Multistage Membranes extractor, every one-level film abstractor water outlet is equipped with switch valve for switching to the pipeline that every one-level film abstractor is connected with subordinate film abstractor or the pipeline be connected with described biological synthesis treater.
2. a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water according to claim 1, it is characterized in that, establish grid or screen cloth in described pretreater, aperture is 2mm ~ 6mm.
3. a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water according to claim 1, it is characterized in that, alkali lye adding device and pH detecting unit is established in described pH-meter, described pH-meter regulates wastewater pH by adding alkaline substance, and described alkaline matter is calcium hydroxide or sodium hydroxide solution.
4. a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water according to claim 1, it is characterized in that, described filtering treater is cloth bag type or disc filter.
5. a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water according to claim 1, it is characterized in that, described extraction liquid concentration is 15%.
6. a kind of Using Multistage Membranes extraction biological synthesis treatment system processing high ammonia nitrogen in waste water according to claim 1, it is characterized in that, described spe membrane mean pore size is 50nm.
7. process a Using Multistage Membranes extraction biological comprehensive treatment for high ammonia nitrogen in waste water, it is characterized in that, realized by following steps:
1) containing high ammonia-nitrogen wastewater first through pretreater, get rid of in waste water in granular substance;
2) through 1) process after wastewater streams through pH-meter, in described pH-meter by interpolation alkaline matter wastewater pH is adjusted to 10.5 ~ 11.5;
3) through 2) waste water treater filtration treatment after filtration again after process;
4) high ammonia-nitrogen wastewater after filtering enters Using Multistage Membranes extractor and extracts, and when described waste water passes through inside spe membrane, amino molecule appears from membranous wall, is absorbed by the extraction liquid outside wall, the NH in waste water
3-N is removed; One-level film abstractor water outlet detects through automatic detection unit, if ammonia nitrogen concentration is lower than 200mg/L in described waste water, water outlet enters biological synthesis process, otherwise enters secondary membrane extractor; Similarly, if ammonia nitrogen concentration is lower than 200mg/L in described secondary membrane extractor water outlet waste water, water outlet then enters biological synthesis treater, otherwise enters three grades of film abstractors; Described extraction liquid flows through three grades of film abstractors, secondary membrane extractor and one-level film abstractor successively in described Using Multistage Membranes extractor, and the extraction liquid entrance that the final dope containing ammonia nitrogen was recovered or flow back into described three grades of film abstractors recycles.
5) waste water is after the process of Using Multistage Membranes extractor, flows out from described three grades of film abstractor water outlets, and whether only contain ammonia nitrogen according in waste water, described waste water will enter and process further except ammoniacal liquor collector is collected or enters described biological synthesis treater.
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| CN106007199A (en) * | 2016-07-01 | 2016-10-12 | 博天环境工程（北京）有限公司 | Method for treating wastewater of rifampicin antibiotic washing section |
| CN106865828A (en) * | 2017-04-01 | 2017-06-20 | 来安县万博丰环保科技有限公司 | A kind of method of recovery of benzoic acid in waste water from benzoic acid |
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