CN106746053A - Sewage from Ships denitrifying method and system - Google Patents
Sewage from Ships denitrifying method and system Download PDFInfo
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- CN106746053A CN106746053A CN201710030960.6A CN201710030960A CN106746053A CN 106746053 A CN106746053 A CN 106746053A CN 201710030960 A CN201710030960 A CN 201710030960A CN 106746053 A CN106746053 A CN 106746053A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000010865 sewage Substances 0.000 title claims abstract description 47
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 56
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000460 chlorine Substances 0.000 claims abstract description 43
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 22
- 230000003647 oxidation Effects 0.000 claims abstract description 21
- 244000000010 microbial pathogen Species 0.000 claims abstract description 5
- 238000005189 flocculation Methods 0.000 claims description 33
- 230000016615 flocculation Effects 0.000 claims description 33
- 238000006298 dechlorination reaction Methods 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 239000010802 sludge Substances 0.000 claims description 23
- 230000018044 dehydration Effects 0.000 claims description 20
- 238000006297 dehydration reaction Methods 0.000 claims description 20
- 238000006386 neutralization reaction Methods 0.000 claims description 19
- 239000013049 sediment Substances 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 239000013535 sea water Substances 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims description 10
- 239000011574 phosphorus Substances 0.000 claims description 10
- 238000012806 monitoring device Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000011056 performance test Methods 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 4
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 125000001477 organic nitrogen group Chemical group 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000005446 dissolved organic matter Substances 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000003851 biochemical process Effects 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- -1 thio sulphur Chemical compound 0.000 description 2
- SCVJRXQHFJXZFZ-KVQBGUIXSA-N 2-amino-9-[(2r,4s,5r)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-3h-purine-6-thione Chemical compound C1=2NC(N)=NC(=S)C=2N=CN1[C@H]1C[C@H](O)[C@@H](CO)O1 SCVJRXQHFJXZFZ-KVQBGUIXSA-N 0.000 description 1
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- 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
- C02F2303/04—Disinfection
Abstract
The invention discloses a kind of Sewage from Ships denitrifying method and system, the method being used in conjunction using electrolytic oxidation electrode and preparing chlorine by electrolysis electrode has invented a kind of method of Sewage from Ships denitrogenation processing.The equipment flowsheet process is simple of the invention, only need to three Cascade Systems, floor space is small, it is the half of conventional processes area, high degree of automation, the dosage of flocculant monitors numerical value on-line as index to feed back using TSS, unit realizes Based Intelligent Control, oxidability is strong, strong, denitrification effect is stable to kill pathogenic microorganism effect, ensure more than 90%, ton water process energy consumption is the half of original electrolysis, and electrode life increases substantially, and the amount of the DBPs produced than traditional electrolysis treatment ship sanitary wastewater is low.Therefore, there is fabulous application prospect in Sewage from Ships denitrogenation processing field.
Description
Technical field
The invention belongs to Sewage from Ships technical field, more particularly to Sewage from Ships denitrogenation processing method and be
System.
Background technology
With the development of shipping industry, undressed ship sanitary wastewater is directly discharged in seawater, is to cause ocean dirty
One major reason of dye.The marine pollution matter brought by transporting by sea is also gradually attracted attention and attention.It is newest
Revision《Sewage treatment unit effluent standards in 2012 and performance test implement directive/guide》Then nitrogen, phosphorus are also listed in
Con trolling index, but current ship sanitary wastewater handling process is have significant limitations for the removal effect of nitrogen and phosphorus
's.
At present, existing conventional ship sewage treatment technique mainly has biochemical process, embrane method, electrochemical process etc..
Biochemical process treatment land sanitary wastewater technology is highly developed, but the environmental condition on ship is disliked than land
Bad much ship is ceaselessly navigated by water, and hull temperature difference is big, and salt content is also higher than land life and gives up in ship sanitary wastewater
Water, this is very high for the requirement of microorganism itself, it is difficult to there is a kind of microorganism completely to adapt to this condition, sewage disposal
Outlet effect is unstable afterwards.And biochemical process treatment ship sanitary wastewater floor space is big, manage more complicated, but can on ship
Limited with space, biochemical process treatment ship sanitary wastewater limitation is very high.
The embrane methods such as micro-filtration, nanofiltration, counter-infiltration are also a kind of common method of Sewage from Ships treatment, embrane method treatment ship
Sanitary wastewater is the process that pollutant is carried out physical separation, it is impossible to fundamentally decompose pollutant.Embrane method processes ship
Although, to water quality requirement than relatively low, process operation high cost, in the process of running, influent side impurities in water is in film for sanitary wastewater
Area is tired to be cohered to form fouling membrane, so as to influence its operation stability and effluent quality, it is necessary to often carry out the cleaning of film.
Electrochemical process is one of widely used at present and extremely potential Sewage from Ships preprocess method.But
Be fused into one for electro-oxidation electrode and preparing chlorine by electrolysis electrode by traditional electrochemical process, when current density is too low, electroxidation electricity
Pole oxidation susceptibility is not high, when current density is too high, then produces irreversible loss to preparing chlorine by electrolysis electrode, makes its service life
Have a greatly reduced quality, and energy consumption is too high, converts electrical energy into for heat energy, raises water temperature obvious, and operating cost is high, aoxidizes and chlorine processed
Integrated electrode is very little to the removal effect of total nitrogen.
There is complex structure, operating cost high, inconvenient operation, treatment effect and do not reach in the above analysis, prior art
The problems such as mark need to solve.
The content of the invention
It is complicated in order to solve current Sewage from Ships denitrification treatment process, plural serial stage technique is needed in biochemical process, account for
Ground area is big, and high to the activity and environmental resistance of microorganism, and denitrification effect fluctuation is big, ton water process power consumption in electrolysis
Greatly, electrode life is short, the problems such as high energy consumption, the present invention is intended to provide a kind of Sewage from Ships denitrifying method.
The technical scheme is that：A kind of Sewage from Ships denitrifying method, it is characterised in that including following step
Suddenly：
（1）Pretreatment：Using aluminium polychloride as flocculant, after precipitation, supernatant liquor enters lower step process, and lower floor's sludge is carried out
Dewater treatment, sludge filtrate flow converges repetition pretreatment with raw water；
（2）Electrolysis：The seawater for introducing a part by the sewage after pre- flocculation is electrolysed, and electrolysis electrolytic process includes two kinds：
One kind is oxidization electrolysis, is mainly used in for dissolved organic matter being oxidized to inorganic matter, and soluble organic nitrogen is oxidized into ammonia nitrogen；Separately
It is a kind of to be mainly used in for seawater electrolysis producing sodium hypochlorite for chlorine processed is electrolysed, it is gaseous nitrogen by ammonium oxidation, so as to reach removal
The effect of total nitrogen in water body, remaining sodium hypochlorite then mainly kills pathogenic microorganism；
（3）Neutralize dechlorination：A certain amount of reducing agent sodium thiosulfate is added in sewage after electrolysis treatment carries out removing chlorine residue,
Sewage discharge after neutralization is to outside hull.
Described step（1）In：The TSS values of on-line checking raw water, the dosage of flocculant poly aluminium chloride is with Al3+Meter
Calculate, be 1.5 times into water TSS detected values；After input flocculant, 10-30s is quickly stirred, then low rate mixing 2-4min, precipitated
5-20min, by after pretreatment, the clearance of total phosphorus can reach more than 90%；Supernatant liquor enters into electrolysis step, lower floor
Sludge carries out dewater treatment by sludge recovery system, and dried sludge is used after collecting, and sludge filter liquor is then flowed back to
To pretreatment system.
Described.
Described step（2）In：It is 1 to need to introduce seawater bulk with the volume ratio of sewage:3；Described oxidization electrolysis are adopted
With oxidizing electrode is electrolysed, described chlorine processed electrolysis uses the number of preparing chlorine by electrolysis electrode, electrolytic oxidation electrode and preparing chlorine by electrolysis electrode
Amount is than being 2:1, electrolysis time is 10-30s, by after the technique, total phosphorus removal effect can reach 98%, total nitrogen removal effect
The indexs such as more than 90%, COD, BOD5, thermotolerant coliform can be reached to meet《Sewage treatment unit discharge in 2012
Thing standard and performance test implement directive/guide》Regulation.
Described step（3）In：The residual chlorine concentration in sewage, the thio sulphur of reducing agent after being electrolysed are determined using chlorine residual measurement instrument
The concentration that adds of sour sodium is 1.5 times of chlorine residue.
The system of the Sewage from Ships denitrifying method described in a kind of implementation, it is characterised in that including by pipeline
Pretreatment unit, electrolysis cells and the neutralization dechlorination unit being sequentially connected.
Described pretreatment unit includes：TSS on-line measuring devices, pre- flocculation plant, flocculation stirring device, flocculant storage
Deposit sediment collection device and sludge filter liquor backflow dress after tank, flocculant automatic adding device, sediment dehydration device, dehydration
Put, TSS on-line measuring devices are installed in the raw water introduction pipe line of pre- flocculation plant, in pre- flocculation plant built with flocculation stirring
Device, flocculant holding vessel is by flocculant automatic adding device to adding flocculant in pre- flocculation plant；In the pre- flocculation dress
The bottom put is provided with sediment dehydration device, and the sediment dehydration device bottom is connected with sediment collection device after dehydration, should
The liquid outlet of sediment dehydration device returns to the pre- flocculation plant by sludge filter liquor reflux.
Described electrolysis cells include electrolytic cell, electrolytic oxidation electrode and preparing chlorine by electrolysis electrode, in electrolytic cell built with many
Electrolytic oxidation electrode and preparing chlorine by electrolysis electrode that individual alternate intervals are set, two electrolysis are set in each preparing chlorine by electrolysis surrounding them
Oxidizing electrode；The sewage inlet of the electrolytic cell one end is connected with the outlet of sewer of described pre- flocculation plant bottom.
Described neutralization dechlorination unit includes that residual chlorine monitoring device, hypo solution conservation tank, reducing agent are thrown automatically
Feeder apparatus, neutralization dechlorination apparatus and dechlorination agitating device, between the outlet of sewer of electrolytic cell and the entrance of neutralization dechlorination apparatus
Residual chlorine monitoring device is installed, in the neutralization dechlorination apparatus built with dechlorination agitating device；Hypo solution conservation tank passes through
Reducing agent automatic adding device, and reduced to addition in the neutralization dechlorination apparatus according to the chlorine content of the detection of residual chlorine monitoring device
Agent.
It is an advantage of the invention that：The floor space of technique before can reducing, hydraulic detention time is passed through within 15min
After treatment, more than 90%, more than 98%, the index such as SS, COD, BOD5 meets the clearance of total phosphorus the clearance of total nitrogen
《Sewage treatment unit effluent standards in 2012 and performance test implement directive/guide》Regulation, the growing amount of DBPs
More than 50% is reduced than traditional handicraft.
Brief description of the drawings
Fig. 1 is the process chart of processing method of the present invention；
Fig. 2 is that the overall of processing system of the present invention constitutes schematic diagram.
Description of reference numerals：1st, TSS on-line measuring devices, 2, pre- flocculation plant, 3, flocculation stirring device, 4, flocculant storage
Deposit tank, 5, flocculant automatic adding device, 6, sediment dehydration device, 7, sediment collection device after dehydration, 8, sludge leaches
Liquid reflux, 9, electrolytic cell, 10, electrolytic oxidation electrode, 11, preparing chlorine by electrolysis electrode, 12, residual chlorine monitoring device, 13, thio sulphur
Acid sodium solution conservation tank, 14, reducing agent automatic adding device, 15, neutralize dechlorination apparatus, 16, dechlorination agitating device.
Specific embodiment
Referring to Fig. 1, invention provides a kind of Sewage from Ships denitrification treatment process, dirty to solve life at present
Water treatment system processing method is complicated, and denitrification effect is poor and unstable, the problems such as occupation area of equipment is big.The technique includes：
（1）Pretreatment：
Using aluminium polychloride as flocculant, the dosage of polyaluminium is with Al3+Calculating is into the 1.5 of water TSS detection numerical value
Times, after input flocculant, 20s is quickly stirred, then low rate mixing 3min, 10min is precipitated, by after pretreatment, total phosphorus goes
Except rate can reach more than 90%, supernatant liquor enters into electrolyzer system, and lower floor's sludge is taken off by sludge recovery system
Water process, after dried sludge is collected, ship can carry out the burning electricity generation of land as solid waste after stopping, and sludge is leached
Liquid then flow back into pretreatment system.
（2）Raw water adds certain proportion seawater to be electrolysed：
Electrolysis system is entered into by pretreated sewage, is now also required to introduce certain seawater, seawater bulk and sewage
Volume ratio be 1:3, electrolysis system is mainly made up of two parts, and a part of electrode is electrolysed for electrolytic oxidation, mainly by dissolubility
Oxidation operation is inorganic matter, and soluble organic nitrogen is oxidized into ammonia nitrogen, and another part electrode is preparing chlorine by electrolysis electrode, mainly will
Seawater electrolysis produces sodium hypochlorite, is gaseous nitrogen by ammonium oxidation, so as to reach the effect of total nitrogen in removal water body, remaining time
Sodium chlorate then mainly kills pathogenic microorganism.The quantity ratio of electrolytic oxidation electrode and preparing chlorine by electrolysis electrode is 2:1, electrolysis time is
20s, by after the technique, total phosphorus removal effect can reach 98%, total nitrogen removal effect can reach more than 90%, COD,
The indexs such as BOD5, thermotolerant coliform meet《Sewage treatment unit effluent standards in 2012 and performance test are implemented
Directive/guide》Regulation.
（3）Neutralize dechlorination：
After the chlorine residual measurement instrument of dechlorination system determines residual chlorine concentration, the concentration that adds of reducing agent sodium thiosulfate is chlorine residue
1.5 times, the sewage after neutralization is then directly discharged to outside hull.
One specific embodiment：Using aluminium polychloride as flocculant, the dosage of polyaluminium is with Al3+Calculate, be
1.5 times of water inlet TSS detection numerical value, after input flocculant, quickly stir 20s, then low rate mixing 3min, precipitate 10min, so
Supernatant liquor is entered into electrolysis system afterwards, by electrolytic cell oxidization electrolysis 20s, then electrolytic liquid body is tested, always
Phosphorus ligands effect can reach 98%, and total nitrogen removal effect can reach the indexs such as more than 90%, COD, BOD5, thermotolerant coliform
Meet《Sewage treatment unit effluent standards in 2012 and performance test implement directive/guide》Regulation.
Referring to Fig. 2, the system of the Sewage from Ships denitrifying method described in a kind of implementation of the invention, including by pipe
Pretreatment unit A, electrolysis cells B and neutralize dechlorination unit C that line is sequentially connected.
Described pretreatment unit A includes：TSS on-line measuring devices 1, pre- flocculation plant 2, flocculation stirring device 3, flocculation
Sediment collection device 7 and sludge are leached after agent holding vessel 4, flocculant automatic adding device 5, sediment dehydration device 6, dehydration
Liquid reflux 8, installs TSS on-line measuring devices 1, in pre- flocculation plant 2 in the raw water introduction pipe line of pre- flocculation plant 2
Equipped with flocculation stirring device 3, flocculant holding vessel 4 is by flocculant automatic adding device 5 to addition flocculation in pre- flocculation plant 2
Agent；Sediment dehydration device 6 is provided with the bottom of the pre- flocculation plant 2, is precipitated after the bottom of sediment dehydration device 6 and dehydration
Thing collection device 7 is connected, and it is pre- that the liquid outlet of the sediment dehydration device 6 returns to this by sludge filter liquor reflux 8
Flocculation plant 2.
Described electrolysis cells B includes electrolytic cell 9, electrolytic oxidation electrode 10 and preparing chlorine by electrolysis electrode 11, in electrolytic cell 9
Equipped with electrolytic oxidation electrode 10 and preparing chlorine by electrolysis electrode 11 that multiple alternate intervals are set, around each preparing chlorine by electrolysis electrode 11
Two electrolytic oxidation electrodes 10 are set；The sewage inlet of the one end of electrolytic cell 9 goes out with the sewage of the described bottom of pre- flocculation plant 2
Mouth connection.
Described neutralization dechlorination unit C includes residual chlorine monitoring device 12, hypo solution conservation tank 13, reducing agent certainly
Dynamic throwing device 14, neutralization dechlorination apparatus 15 and dechlorination agitating device 16, in outlet of sewer and the neutralization dechlorination apparatus of electrolytic cell 9
Residual chlorine monitoring device 12 is installed, in the neutralization dechlorination apparatus 15 built with dechlorination agitating device 16 between 15 entrance；Thio sulphur
Acid sodium solution conservation tank 13 by reducing agent automatic adding device 14, and according to the chlorine content of the detection of residual chlorine monitoring device 12 to
Addition reducing agent in the neutralization dechlorination apparatus 15.
Method of the present invention by being used in conjunction using electrolytic oxidation electrode and preparing chlorine by electrolysis electrode, for Sewage from Ships
Denitrogenation processing.Present device and handling process are simple, it is only necessary to which three Cascade Systems, floor space is small, are conventional process works
The half of skill area, high degree of automation；The dosage of flocculant monitors numerical value on-line as index to feed back using TSS, each
Unit realizes Based Intelligent Control, and oxidability is strong, strong, denitrification effect is stable to kill pathogenic microorganism effect, it is ensured that more than 90%,
Ton water process energy consumption is the half of original electrolysis, and electrode life increases substantially, and processes ship than traditional electrolysis
The amount of the DBPs that sanitary wastewater is produced is low.Therefore, there is fabulous answering in Sewage from Ships denitrogenation processing field
Use prospect.
Claims (8)
1. a kind of Sewage from Ships denitrifying method, it is characterised in that comprise the following steps：
Pretreatment：Using aluminium polychloride as flocculant, after precipitation, supernatant liquor enters lower step process, and lower floor's sludge is taken off
Water process, sludge filtrate flow converges repetition pretreatment with raw water；
Electrolysis：The seawater for introducing a part by the sewage after pre- flocculation is electrolysed, including two kinds of electrolysis treatment：One kind is oxygen
Change electrolysis, be mainly used in for dissolved organic matter being oxidized to inorganic matter, soluble organic nitrogen is oxidized to ammonia nitrogen；Another kind is system
Chlorine is electrolysed, and is mainly used in for seawater electrolysis producing sodium hypochlorite, is gaseous nitrogen by ammonium oxidation, total in removal water body so as to reach
The effect of nitrogen, remaining sodium hypochlorite then mainly kills pathogenic microorganism；
Neutralize dechlorination：A certain amount of reducing agent sodium thiosulfate is added in sewage after electrolysis treatment carries out removing chlorine residue, in
Sewage discharge with after is to outside hull.
2. Sewage from Ships denitrifying method according to claim 1, it is characterised in that described step（1）In：
The TSS values of on-line checking raw water, the dosage of flocculant poly aluminium chloride is with Al3+Calculate, be 1.5 times into water TSS detected values；
After input flocculant, 10-30s is quickly stirred, then low rate mixing 2-4min, precipitate 5-20min, by after pretreatment, total phosphorus
Clearance can reach more than 90%；Supernatant liquor enters into electrolysis step, and lower floor's sludge is carried out by sludge recovery system
Dewater treatment, dried sludge is used after collecting, and sludge filter liquor then flow back into pretreatment system.
3. Sewage from Ships denitrifying method according to claim 1, it is characterised in that described step（2）In：
It is 1 to need to introduce seawater bulk with the volume ratio of sewage:3；Described oxidization electrolysis use electrolytic oxidation electrode, described chlorine processed
Electrolysis uses preparing chlorine by electrolysis electrode, and electrolytic oxidation electrode is 2 with the quantity ratio of preparing chlorine by electrolysis electrode:1, electrolysis time is 10-
30s, by after the technique, total phosphorus removal effect can reach 98%, total nitrogen removal effect can reach more than 90%, COD,
The indexs such as BOD5, thermotolerant coliform meet《Sewage treatment unit effluent standards in 2012 and performance test are implemented
Directive/guide》Regulation.
4. Sewage from Ships denitrifying method according to claim 1, it is characterised in that described step（3）In：
The residual chlorine concentration in sewage after being electrolysed is determined using chlorine residual measurement instrument, the concentration that adds of reducing agent sodium thiosulfate is chlorine residue
1.5 times.
5. a kind of system for implementing the Sewage from Ships denitrifying method described in claim 1, it is characterised in that including logical
Cross pretreatment unit A, electrolysis cells B and neutralization dechlorination unit C that pipeline is sequentially connected.
6. system according to claim 5, it is characterised in that described pretreatment unit A includes：TSS on-line checkings are filled
Put 1, pre- flocculation plant 2, flocculation stirring device 3, flocculant holding vessel 4, flocculant automatic adding device 5, sediment dehydration dress
Sediment collection device 7 and sludge filter liquor reflux 8 after 6, dehydration are put, in the raw water introduction pipe line of pre- flocculation plant 2
TSS on-line measuring devices 1 are installed, in pre- flocculation plant 2 built with flocculation stirring device 3, flocculant holding vessel 4 passes through flocculant
Automatic adding device 5 in pre- flocculation plant 2 to adding flocculant；Sediment dehydration dress is provided with the bottom of the pre- flocculation plant 2
6 are put, the bottom of sediment dehydration device 6 is connected with sediment collection device 7 after dehydration, the liquid of the sediment dehydration device 6
Outlet returns to the pre- flocculation plant 2 by sludge filter liquor reflux 8.
7. system according to claim 6, it is characterised in that described electrolysis cells B includes electrolytic cell 9, electrolytic oxidation
Electrode 10 and preparing chlorine by electrolysis electrode 11, the electrolytic oxidation electrode 10 set built with multiple alternate intervals in electrolytic cell 9 and electrolysis
Chloride electrode processed 11, sets two electrolytic oxidation electrodes 10 around each preparing chlorine by electrolysis electrode 11；The sewage of the one end of electrolytic cell 9
Entrance is connected with the outlet of sewer of the described bottom of pre- flocculation plant 2.
8. system according to claim 7, it is characterised in that described neutralization dechlorination unit C includes
Residual chlorine monitoring device 12, hypo solution conservation tank 13, reducing agent automatic adding device 14, neutralization dechlorination apparatus 15
With dechlorination agitating device 16, residual chlorine monitoring dress is installed between the outlet of sewer of electrolytic cell 9 and the entrance of neutralization dechlorination apparatus 15
12 are put, in the neutralization dechlorination apparatus 15 built with dechlorination agitating device 16；Hypo solution conservation tank 13 passes through reducing agent
Automatic adding device 14, and reduced to addition in the neutralization dechlorination apparatus 15 according to the chlorine content of the detection of residual chlorine monitoring device 12
Agent.
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| CN113200632A (en) * | 2021-05-13 | 2021-08-03 | 舟山市润润环保能源科技有限公司 | Method for denitrifying water body entering estuary |
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| CN114772808A (en) * | 2022-04-28 | 2022-07-22 | 南京大学 | Method for treating and recycling resin desorption solution by nanofiltration-electrochemical method |
| CN114772808B (en) * | 2022-04-28 | 2023-11-07 | 南京大学 | Method for treating resin desorption liquid and recycling resin desorption liquid by nanofiltration-electrochemical method |
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