CN113003800A - Wastewater quality-based treatment process - Google Patents
Wastewater quality-based treatment process Download PDFInfo
- Publication number
- CN113003800A CN113003800A CN202110211602.1A CN202110211602A CN113003800A CN 113003800 A CN113003800 A CN 113003800A CN 202110211602 A CN202110211602 A CN 202110211602A CN 113003800 A CN113003800 A CN 113003800A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- discharging
- treatment
- nickel
- copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 279
- 238000000034 method Methods 0.000 title claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052802 copper Inorganic materials 0.000 claims abstract description 31
- 239000010949 copper Substances 0.000 claims abstract description 31
- 238000007599 discharging Methods 0.000 claims abstract description 24
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 7
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000011268 retreatment Methods 0.000 claims abstract description 4
- 239000008394 flocculating agent Substances 0.000 claims abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 60
- 229910052759 nickel Inorganic materials 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 27
- 238000004065 wastewater treatment Methods 0.000 claims description 24
- 239000000126 substance Substances 0.000 claims description 22
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 18
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 18
- 229910052804 chromium Inorganic materials 0.000 claims description 18
- 239000011651 chromium Substances 0.000 claims description 18
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 18
- 239000002585 base Substances 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 229910001430 chromium ion Inorganic materials 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 230000033116 oxidation-reduction process Effects 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 8
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 229910001453 nickel ion Inorganic materials 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000007255 decyanation reaction Methods 0.000 claims description 4
- 238000005342 ion exchange Methods 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 235000010265 sodium sulphite Nutrition 0.000 claims description 4
- 229940037003 alum Drugs 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 3
- 239000003729 cation exchange resin Substances 0.000 description 3
- 229910001431 copper ion Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003957 anion exchange resin Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
-
- 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
- C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
-
- 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
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2101/18—Cyanides
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- 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
- C02F2209/04—Oxidation reduction potential [ORP]
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The application relates to a wastewater quality-based treatment process, which comprises the steps of classifying and treating wastewater, namely treating five kinds of wastewater with different pollutions respectively; treating tail end wastewater: mixing cyanide-containing wastewater, copper-containing wastewater and acid-base wastewater; reverse osmosis treatment of wastewater: introducing all the wastewater into a regulating tank, electrifying, regulating the ph to be alkaline, and adding a flocculating agent to reduce heavy metals in the wastewater; and (3) detecting emission: discharging the wastewater into a monitoring water tank to see whether each index meets the national discharge standard or not, and discharging the wastewater outwards after the indexes meet the discharge standard; and returning the wastewater to the regulating pond for retreatment when the wastewater does not meet the standard. This application has the multiple waste water of being convenient for purification treatment simultaneously, and has effectively improved the effect of the outside security of discharging of waste water.
Description
Technical Field
The application relates to the field of wastewater treatment processes, in particular to a wastewater quality-based treatment process.
Background
The wastewater treatment process refers to an economic, reasonable and scientific treatment method for urban domestic sewage and industrial wastewater, and the process level of wastewater treatment is continuously improved along with the improvement of science and technology and the continuous improvement of the living standard of people.
Chinese patent publication No. CN102120660B discloses a process and equipment for treating wastewater containing chromium ions, which comprises a cartridge filter, an ion exchanger loaded with H-type strong acid cation exchange resin, and an ion exchanger loaded with chromium-removing anion exchange resin. After the wastewater is pre-filtered, the wastewater passes through H-type strong acid cation exchange resin, cations in the wastewater are enriched by the H-type strong acid cation exchange resin and hydrogen ions are exchanged, so that the wastewater is acidic, and then various ions in the wastewater are subjected to resin adsorption, enrichment, elution and removal.
In view of the above-mentioned related arts, the inventors consider that the above-mentioned wastewater treatment process has a defect that only a single kind of wastewater can be treated, and thus it is inconvenient to treat wastewater doped with various wastes.
Disclosure of Invention
In order to solve the problem that waste water doped with various wastes is inconvenient to treat, the application provides a waste water quality-based treatment process.
The application provides a waste water divides matter processing technology adopts following technical scheme:
a wastewater quality-based treatment process comprises the following treatment steps:
and (3) classifying and treating wastewater: discharging the chromium-containing wastewater into a chromium-containing wastewater treatment device through a drainage tube, and removing chromium for later use; discharging nickel-containing wastewater into a nickel-containing wastewater treatment device through a drainage tube, and removing nickel for standby; discharging the cyanide-containing wastewater into a cyanide-containing wastewater treatment device through a drainage tube, and removing cyanide for later use; discharging the copper-containing wastewater into a copper-containing wastewater treatment device through a drainage tube, and removing copper for later use; discharging the acid-base wastewater into an acid-base wastewater treatment device through a drainage tube, and removing acid-base components in the liquid for later use;
treating tail end wastewater: mixing cyanide-containing wastewater, copper-containing wastewater and acid-base wastewater, and adding a sodium hydroxide solution to adjust the pH value to 11; then, adding sodium hypochlorite to maintain the oxidation-reduction potential of the wastewater at 350mv for later use;
reverse osmosis treatment of wastewater: introducing all the wastewater into a regulating tank, electrifying, adding sodium hydroxide to regulate ph to 11, and adding sodium hypochlorite to maintain the oxidation-reduction potential of the wastewater at 350 mv; adding a flocculating agent into the wastewater to form alum floc, then taking out the supernatant, adding sulfuric acid to adjust the ph to 8, and allowing the effluent to enter an intermediate water tank; then, filtering the wastewater by quartz, and adsorbing heavy metals in the wastewater by resin for standby;
and (3) detecting emission: discharging the wastewater into a monitoring water tank to see whether each index meets the national discharge standard or not, and discharging the wastewater outwards after the indexes meet the discharge standard; and returning the wastewater to the regulating pond for retreatment when the wastewater does not meet the standard.
By adopting the technical scheme, the wastewater classification treatment can reduce the content of specific chromium, nickel, cyanogen, copper or acid-base substances in the wastewater by independently treating different types of wastewater; the tail end wastewater treatment is realized by mixing specific types of wastewater, so that the chemical stability of different types of wastewater after mixing is improved, the reaction phenomenon of oxidation and reduction again after different substances are contacted is reduced, and the safety of wastewater mixed discharge is further ensured; the reverse osmosis treatment of the wastewater further reduces the content of active molecules and heavy metal ions in the wastewater, and further inhibits the phenomenon that harmful substances are generated after various types of wastewater are mixed, so that the process further ensures the stability of the various types of wastewater after being mixed, and further improves the stability of the various types of wastewater after being mixed and the safety of the mixed discharge of the various types of wastewater.
Preferably, in the wastewater classification treatment, sodium sulfite is added to reduce chromium ions during chromium removal, the ph of the wastewater is controlled to be 2-3, the reaction time is 20-40min, and the wastewater needs to be precipitated for 1-1.5h after the reaction until the concentration of the chromium ions in the wastewater is reduced to be below 0.5 mg/L.
By adopting the technical scheme, under the condition of strong acid, the chromium ions can be quickly replaced by sodium sulfite, so that the content of the chromium ions in the wastewater is effectively reduced; the reaction time of more than 20min can ensure the full reaction degree of the chromium ions and reduce the phenomenon that the chromium ions are remained in the wastewater; the precipitated wastewater exceeds 1 hour after the reaction, and the concentration of the chromium ions is ensured to be reduced to be below 0.5mg/L, so that the chromium ions in the wastewater can be completely removed, and the phenomenon that the chromium ions are generated again after the reaction is finished for a period of time can be effectively reduced.
Preferably, in the wastewater classification treatment, before nickel removal, the wastewater is blown by using a blowing device, and then the nickel in the wastewater is absorbed and recovered by an ion exchange device until the concentration of nickel ions in the wastewater is reduced to less than 0.5 ppm.
By adopting the technical scheme, the blowing device blows the wastewater to reduce the amount of the nickel-containing liquid medicine in the wastewater; the ion exchange device recovers nickel through the adsorption of resin to effectively reduce the nickel content in the wastewater, and further the nickel content reaches the standard when the wastewater is effectively ensured to be discharged.
Preferably, in the wastewater classification treatment, sodium hypochlorite is added during cyanogen removal until the ph of the wastewater is 10-11 and the oxidation-reduction potential is 300mv, and then the wastewater is precipitated for 1 h.
By adopting the technical scheme, the sodium hypochlorite can quickly react with cyanogen-containing substances so as to reduce the cyanogen content in the wastewater; when the wastewater reaches high alkali content and the oxidation-reduction potential of the wastewater is 300mv, the retaining environment of cyanogen substances is poor, and the cyanogen substances are difficult to retain in the wastewater for a long time; the precipitation is used for stabilizing the cyanogen substances in the wastewater for 1 hour, so that the phenomenon of regeneration of the cyanogen substances after different wastewater is mixed is reduced.
Preferably, the wastewater is subjected to secondary decyanation during decyanation, and after the wastewater is precipitated for 1 hour, an operator needs to add sodium hypochlorite again to adjust the ph of the wastewater to 7-8 and adjust the redox potential to 650 mv.
Through adopting above-mentioned technical scheme, the secondary drops into sodium hypochlorite and removes cyanogen to further reduce the cyanogen class material content in the waste water, simultaneously, adjusts ph to low basicity, appears mutual redox phenomenon when in order to reduce cyanide-containing waste water and the combination of remaining waste water, and this process has further improved the stability after multiclass waste water mixes, and has further improved multiclass waste water and has mixed the discharged security.
Preferably, in the wastewater classification treatment, before the step of removing nickel, the step of removing copper needs to introduce the nickel-containing wastewater which is not treated into the copper-containing wastewater, so that the ph of the wastewater is more than 7; precipitating for 1.5h, and measuring the ph of the wastewater again to ensure that the ph of the wastewater is still more than 7.
By adopting the technical scheme, untreated nickel-containing wastewater is introduced into copper-containing wastewater, and copper ions in the wastewater are replaced through neutralization reaction of the nickel-containing wastewater and the copper-containing wastewater, so that the copper content in the wastewater is reduced; when the input amount of the nickel-containing wastewater is large, an operator can quickly replace copper by inputting sodium hydroxide, and the input amount of copper substances is effectively reduced while copper substances in the wastewater are quickly replaced.
Preferably, in the wastewater classification treatment, hydrogen peroxide, aluminum chloride and polyacrylamide are added when acid and alkali substances in the wastewater are removed, so that the ph of the wastewater is 8-9, and then the wastewater is kept stand for 45 min.
By adopting the technical scheme, the reaction speed of acid and alkali substances in the wastewater can be accelerated by the input of hydrogen peroxide, aluminum chloride and polyacrylamide, so that the precipitation speed of acid and alkali harmful substances in the wastewater is accelerated, meanwhile, the acid and alkali balance in the wastewater is improved, and the safety of outwards discharging various types of wastewater after mixing is improved.
Preferably, in the tail end wastewater treatment, wastewater needs to be introduced into a PTFE membrane pool so as to carry out solid-liquid separation on the wastewater; pumping the solid concentrated waste in the wastewater to a sludge tank, introducing the liquid in the wastewater into a callback tank, adding sulfuric acid until the ph is 8, and finally introducing the wastewater into an intermediate water tank for later use.
Through adopting above-mentioned technical scheme, the PTFE membrane is through separating the solid-liquid state material in to the waste water to improve the clear discharge efficiency of waste water, and further reduced the polluting of waste water discharge.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by classifying and treating the waste water containing different kinds of harmful substances, the harmful substances in the waste water are quickly reduced; through terminal wastewater treatment and wastewater reverse osmosis treatment, the stability of various types of wastewater after mixing is guaranteed, the safety of discharge of the mixed wastewater is improved, and the pollution of wastewater discharge is reduced;
2. the cyanogen is removed by adding the sodium hypochlorite twice, so that the content of cyanogen substances in the wastewater is reduced, meanwhile, the phenomenon that the tear-removing substances regenerate after the various types of wastewater are mixed is effectively reduced, and the safety of outward discharge after the wastewater is mixed is further improved.
Drawings
FIG. 1 is a schematic flow chart of a wastewater quality-based treatment process according to an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a wastewater quality-based treatment process. Referring to fig. 1, a wastewater quality-based treatment process comprises the following treatment steps:
and (3) classifying and treating wastewater: firstly, discharging the copper-containing wastewater into a copper-containing wastewater treatment device through a drainage pipe. And then, introducing the untreated nickel-containing wastewater into a treatment device in which the copper-containing wastewater is positioned, wherein the ph of the copper-containing wastewater is more than 7 by virtue of the characteristic of high alkalinity of the nickel-containing wastewater. When the input amount of the nickel-containing wastewater reaches one third of the total amount of the copper-containing wastewater, and the ph of the copper-containing wastewater does not reach more than 7, an operator can add sodium hydroxide to accelerate the alkalization speed of the wastewater containing water, so that the copper ions can be separated out conveniently.
When the ph of the copper-containing wastewater is more than 7, precipitating the wastewater for 1.5 h. And then measuring the ph of the wastewater again by using a ph meter, and if the ph of the wastewater is still more than 7, indicating that the copper-containing wastewater is completely treated for later use. And if the ph of the copper-containing wastewater is less than 7, adding sodium hydroxide to continuously precipitate copper ions in the wastewater.
Discharging the chromium-containing wastewater into a chromium-containing wastewater treatment device through a drainage tube, and adding sodium sulfite to reduce hexavalent chromium ions in the wastewater. Monitoring the ph of the chromium-containing wastewater through a ph meter to ensure that the ph is maintained between 2 and 3, and simultaneously controlling the ORP to be between 300 and 330 mv. Keeping the pH of the chromium-containing wastewater between 2 and 3 for 30min, and then standing the chromium-containing wastewater to enable the chromium-containing wastewater to be free-precipitated for 1.5 h. When the concentration of chromium ions in the chromium-containing wastewater is reduced to below 0.5mg/L, the chromium-containing wastewater is ready for use.
Discharge nickeliferous waste water to nickeliferous effluent treatment plant in through the drainage tube, operating personnel can install the air-blower in the passageway top of nickeliferous waste water, through air-blower blast air cold wind to make the waste nickel in the nickeliferous waste water break away from nickeliferous waste water, and then reduce the nickel content in the waste water.
Then, the nickel-containing wastewater is led into an ion exchange device with four resin barrels connected in series and communicated with each other in the inner cavity, and the nickel ions are absorbed and recovered by the resin, so that the content of the nickel ions in the wastewater is reduced. When the concentration of nickel ions in the wastewater is reduced to below 0.5ppm, the nickel-containing wastewater is ready for use.
Discharging the cyanide-containing wastewater into a cyanide-containing wastewater treatment device through a drainage tube, and adding sodium hypochlorite twice when removing cyanide from wastewater, wherein the adding proportion of the sodium hypochlorite twice is 1: 1. After the first sodium hypochlorite is added, the ph of the cyanide-containing wastewater is adjusted to 10-11, and the oxidation-reduction potential of the cyanide-containing wastewater is controlled to 300 mv. After that, the precipitate was left for 1 h.
After 1h of precipitation, a second sodium hypochlorite charge was performed. After the second sodium hypochlorite is added, the ph of the cyanide-containing wastewater needs to be adjusted to 7-8, and the oxidation-reduction potential is adjusted to 650 mv. Then, the cyanide-containing wastewater is ready for use.
And finally, discharging the acid-base wastewater into an acid-base wastewater treatment device through a drainage tube. Hydrogen peroxide, aluminum chloride and polyacrylamide are added when acid and alkali substances in the wastewater are removed, the hydrogen peroxide counteracts organic and inorganic pollution in the wastewater through the strong oxidizing property of the hydrogen peroxide, and can strongly oxidize chromophoric groups and chromophoric groups in the acid and alkali wastewater. The polyaluminium chloride and the polyacrylic acid are used for assisting the operation of hydrogen peroxide so as to adjust the ph of the acid-base wastewater to 8-9. And then standing for 45min, and measuring the ph of the acid-base wastewater again to ensure that the acid-base wastewater is alkaline for later use.
Treating tail end wastewater: corresponding cyanide-containing wastewater, copper-containing wastewater and acid-base wastewater in the wastewater treatment device are led out to a new container and mixed, and sodium hydroxide solution is added to adjust the pH of the mixed wastewater to be 11. Thereafter, sodium hypochlorite was added so that the oxidation-reduction potential of the mixed wastewater was maintained at 350 mv. Adding a coagulant into the mixed wastewater, and stirring the mixed wastewater by a handheld stirrer to form a certain amount of fine particles in the mixed wastewater.
And (3) introducing the mixed wastewater after stirring into a PTFE (polytetrafluoroethylene) membrane tank, carrying out solid-liquid separation on the wastewater through a PTFE membrane, and after the fixed concentrated waste in the wastewater is separated out, pumping the solid concentrated waste into a sludge tank for unified treatment. And (3) guiding the liquid in the wastewater into a callback pool, adding sulfuric acid, adjusting the ph of the mixed wastewater to 8, and finally guiding the wastewater into an intermediate water tank for standby.
Reverse osmosis treatment of wastewater: all the waste water is led into a regulating reservoir and electrified, complex chains or chelate chains in the waste water are firstly broken under the action of certain voltage and current, and then fine molecular granular precipitates are formed by the replacement reaction of getting electrons or losing electrons, or the fine molecular granular precipitates are still separated out in the form of hydroxide precipitates of metal ions.
Then, sodium hydroxide was added to adjust ph of the wastewater to 11, and sodium hypochlorite was further added to maintain the oxidation-reduction potential of the wastewater at 350 mv. Adding polymeric alumina into the wastewater to form alum floc, taking out the supernatant, adding sulfuric acid to adjust the ph to 8, and allowing the effluent to enter an intermediate water tank. Then, the waste water is filtered by quartz sand, and the heavy metals in the waste water are adsorbed by resin for standby.
And (3) detecting emission: discharging the wastewater into a monitoring water tank to see whether each index meets the national discharge standard or not, and discharging the wastewater outwards after the indexes meet the discharge standard; and returning the wastewater to the regulating pond for retreatment when the wastewater does not meet the standard.
The implementation principle of the wastewater quality-based treatment process in the embodiment of the application is as follows: by respectively treating five different types of wastewater, chromium, nickel, cyanogen, copper and acid-base substances in the wastewater are separated out or reduced to accord with the national discharge level. And then, five types of waste water containing different substances are mixed, and the waste water is subjected to reverse osmosis treatment, so that the oxidation-reduction reaction in the waste water tends to be stable, heavy metals in the waste water are further reduced, the cleanliness of waste water treatment is improved, and the safety of the discharged waste water is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A wastewater quality-based treatment process is characterized in that: the method comprises the following processing steps: and (3) classifying and treating wastewater: discharging the chromium-containing wastewater into a chromium-containing wastewater treatment device through a drainage tube, and removing chromium for later use; discharging nickel-containing wastewater into a nickel-containing wastewater treatment device through a drainage tube, and removing nickel for standby; discharging the cyanide-containing wastewater into a cyanide-containing wastewater treatment device through a drainage tube, and removing cyanide for later use; discharging the copper-containing wastewater into a copper-containing wastewater treatment device through a drainage tube, and removing copper for later use; discharging the acid-base wastewater into an acid-base wastewater treatment device through a drainage tube, and removing acid-base components in the liquid for later use; treating tail end wastewater: mixing cyanide-containing wastewater, copper-containing wastewater and acid-base wastewater, and adding a sodium hydroxide solution to adjust the pH value to 11; then, adding sodium hypochlorite to maintain the oxidation-reduction potential of the wastewater at 350mv for later use; reverse osmosis treatment of wastewater: introducing all the wastewater into a regulating tank, electrifying, adding sodium hydroxide to regulate ph to 11, and adding sodium hypochlorite to maintain the oxidation-reduction potential of the wastewater at 350 mv; adding a flocculating agent into the wastewater to form alum floc, then taking out the supernatant, adding sulfuric acid to adjust the ph to 8, and allowing the effluent to enter an intermediate water tank; then, filtering the wastewater by quartz, and adsorbing heavy metals in the wastewater by resin for standby; and (3) detecting emission: discharging the wastewater into a monitoring water tank to see whether each index meets the national discharge standard or not, and discharging the wastewater outwards after the indexes meet the discharge standard; and returning the wastewater to the regulating pond for retreatment when the wastewater does not meet the standard.
2. The wastewater quality-divided treatment process according to claim 1, characterized in that: in the wastewater classification treatment, sodium sulfite is added to reduce chromium ions during chromium removal, the ph of the wastewater is controlled to be 2-3, the reaction time is 20-40min, and the wastewater needs to be precipitated for 1-1.5h after the reaction until the concentration of the chromium ions in the wastewater is reduced to be below 0.5 mg/L.
3. The wastewater quality-divided treatment process according to claim 1, characterized in that: in the wastewater classification treatment, before nickel removal, a blowing device is used for blowing the wastewater, and then an ion exchange device is used for absorbing and recovering nickel in the wastewater until the concentration of nickel ions in the wastewater is reduced to be less than 0.5 ppm.
4. The wastewater quality-divided treatment process according to claim 1, characterized in that: in the wastewater classification treatment, sodium hypochlorite is added during cyanogen removal until the ph of the wastewater is 10-11 and the oxidation-reduction potential is 300mv, and then the wastewater is precipitated for 1 h.
5. The wastewater quality-divided treatment process according to claim 4, characterized in that: the wastewater is subjected to secondary decyanation during decyanation, and after the wastewater is precipitated for 1h, an operator needs to add sodium hypochlorite again to adjust the ph of the wastewater to between 7 and 8 and adjust the oxidation-reduction potential to 650 mv.
6. The wastewater quality-divided treatment process according to claim 1, characterized in that: in the wastewater classification treatment, before the nickel removal step, the copper removal step needs to introduce untreated nickel-containing wastewater into copper-containing wastewater, so that the ph of the wastewater is more than 7; precipitating for 1.5h, and measuring the ph of the wastewater again to ensure that the ph of the wastewater is still more than 7.
7. The wastewater quality-divided treatment process according to claim 1, characterized in that: in the wastewater classification treatment, hydrogen peroxide, aluminum chloride and polyacrylamide are added when acid and alkali substances in the wastewater are removed, so that the ph of the wastewater is 8-9, and then the wastewater is kept stand for 45 min.
8. The wastewater quality-divided treatment process according to claim 1, characterized in that: in the tail end wastewater treatment, wastewater needs to be introduced into a PTFE membrane pool so as to carry out solid-liquid separation on the wastewater; pumping the solid concentrated waste in the wastewater to a sludge tank, introducing the liquid in the wastewater into a callback tank, adding sulfuric acid until the ph is 8, and finally introducing the wastewater into an intermediate water tank for later use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211602.1A CN113003800A (en) | 2021-02-25 | 2021-02-25 | Wastewater quality-based treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211602.1A CN113003800A (en) | 2021-02-25 | 2021-02-25 | Wastewater quality-based treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113003800A true CN113003800A (en) | 2021-06-22 |
Family
ID=76386348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110211602.1A Pending CN113003800A (en) | 2021-02-25 | 2021-02-25 | Wastewater quality-based treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113003800A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394695A (en) * | 2022-01-25 | 2022-04-26 | 国网河北省电力有限公司电力科学研究院 | Treatment method for recycling domestic sewage of thermal power plant to circulating cooling water system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201634531U (en) * | 2010-03-12 | 2010-11-17 | 上海瑞勇实业有限公司 | Electroplating wastewater diversion treatment standard emission system |
| CN203904113U (en) * | 2014-06-19 | 2014-10-29 | 苏州市环境保护有限公司 | Classified treatment equipment for sewage |
| JP2015202482A (en) * | 2014-04-16 | 2015-11-16 | 栗田工業株式会社 | Method of treating wastewater containing cyanogen and ammonia |
| CN105884149A (en) * | 2016-06-28 | 2016-08-24 | 吴荐玮 | Process for treating wastewater in electroplate factories |
| CN108609810A (en) * | 2018-06-07 | 2018-10-02 | 江苏善鼎环保科技有限公司 | A kind of processing method and its processing system of chemistry nickel waste water |
-
2021
- 2021-02-25 CN CN202110211602.1A patent/CN113003800A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201634531U (en) * | 2010-03-12 | 2010-11-17 | 上海瑞勇实业有限公司 | Electroplating wastewater diversion treatment standard emission system |
| JP2015202482A (en) * | 2014-04-16 | 2015-11-16 | 栗田工業株式会社 | Method of treating wastewater containing cyanogen and ammonia |
| CN203904113U (en) * | 2014-06-19 | 2014-10-29 | 苏州市环境保护有限公司 | Classified treatment equipment for sewage |
| CN105884149A (en) * | 2016-06-28 | 2016-08-24 | 吴荐玮 | Process for treating wastewater in electroplate factories |
| CN108609810A (en) * | 2018-06-07 | 2018-10-02 | 江苏善鼎环保科技有限公司 | A kind of processing method and its processing system of chemistry nickel waste water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394695A (en) * | 2022-01-25 | 2022-04-26 | 国网河北省电力有限公司电力科学研究院 | Treatment method for recycling domestic sewage of thermal power plant to circulating cooling water system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105884100B (en) | A kind of processing method of heavy metal wastewater thereby | |
| CN103739118B (en) | The treatment process of analysis | |
| WO2014194664A1 (en) | Method for treating wastewater containing cyanides, thiocyanides and heavy metals | |
| CN104973714A (en) | Deep purification and recycling method for waste water containing heavy metal ions | |
| CN105347574A (en) | Fluoride removal method of graphite purification waste water and processing system | |
| CN106746059B (en) | Terminal high salt wastewater treatment system of economical coal fired power plant | |
| Brewster et al. | Use of electrochemical iron generation for removing heavy metals from contaminated groundwater | |
| CN107176726A (en) | Desulphurization for Coal-fired Power Plant waste water integrates defluorination method | |
| CN105565553A (en) | Zero-emission purifying and recycling system of cyanide-containing heavy metal wastewater | |
| CN111252942A (en) | Imidazole-containing chemical silver plating wastewater treatment system and method | |
| CN113896346A (en) | Efficient treatment process for fluorine-containing wastewater | |
| CN106336038A (en) | Treatment method for heavy metal-containing polluted wastewater | |
| CN105502757A (en) | Industrial treatment method of high-concentration arsenic-containing wastewater | |
| CN110668613A (en) | Deep treatment method for gold hydrometallurgy cyanide-containing wastewater | |
| CN113003800A (en) | Wastewater quality-based treatment process | |
| CN109019999A (en) | A kind of processing method of the low concentration containing strong complexing nickel waste water | |
| CN106145446B (en) | A kind of more metal ore dressing complexity waste water immediate processing methods of lead zinc sulphur | |
| CN112573720A (en) | Thermal power plant desulfurization wastewater zero-discharge system and method | |
| CN205099523U (en) | Heavy metal wastewater handles and recovery system | |
| CN108409003B (en) | Treatment method and system for salt-containing organic wastewater after PCB wastewater copper recovery | |
| CN207567053U (en) | A kind of packaged type fluorine-containing waste water processing apparatus | |
| JP2004107780A (en) | Method for recovering and utilizing valuable metal in waste water containing metal | |
| CN207079100U (en) | A kind of combined treatment process system of waste water containing various heavy | |
| CN105174567A (en) | Heavy metal wastewater treatment and recovery system and method | |
| CN212425805U (en) | Treatment recycling system for electric demisting wastewater and/or electric precipitation wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210622 |
|
| RJ01 | Rejection of invention patent application after publication |