CN104829005A - Manganese-containing wastewater processing method - Google Patents
Manganese-containing wastewater processing method Download PDFInfo
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- CN104829005A CN104829005A CN201510211084.8A CN201510211084A CN104829005A CN 104829005 A CN104829005 A CN 104829005A CN 201510211084 A CN201510211084 A CN 201510211084A CN 104829005 A CN104829005 A CN 104829005A
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Abstract
The invention discloses a manganese-containing wastewater processing method. The method comprises the following steps: step A, adjusting the manganese-containing wastewater: filtering manganese-containing wastewater, and discharging the wastewater to an adjusting pool; step B, primarily precipitating manganese-containing wastewater: discharging the manganese-containing wastewater in the adjusting pool to a reaction pool (1), and adding limestone into the reaction pool (1); step C, separating the precipitate: pumping the substances in the reaction pool (1) to a filter express to separate the sludge and water, introducing the effluence from the filter express to a reaction pool (2), and pouring the sludge to a recycle station; step D, secondarily precipitating the manganese-containing wastewater: adding limestone into the reaction pool (2), and discharging the supernate into a coagulation precipitation pool; step E, discharging qualified wastewater: adding sulfuric acid into the coagulation precipitation pool, adjusting the pH value of wastewater to 8.0, then adding a poly(aluminum chloride) solution, stirring for at least 30 minutes, then adding a polyacrylamide solution, keeping on stirring for at least 30 minutes, precipitating for at least two hours, and discharging the qualified supernate.
Description
Technical field
The present invention relates to environmental technology field, specifically Treatment of Wastewater With Manganese method.
Background technology
Manganese is very abundant at the content of occurring in nature, and China's manganese ore reserves reach 4 × 108 t, occupies the 4th, the world.But a large amount of acid Mn-bearing waste waters can be produced in the recovery process of manganese ore, waste water is mainly from mining wastewater and beneficiation wastewater.The a large amount of Mn-bearing waste water of any discharge can cause serious harm to ecotope, polluted underground water and surface water, water can be made to produce and smell taste, occur colourity, also have larger harm to plant; Also have a strong impact on industrial and agricultural production and human health on the other hand, sanitary ware and Industrial products form spot, and the manganese of human body excess intake can damage the central nervous system of the mankind, produces irreversible nervous system disorders.
The process of Mn-bearing waste water is mainly contained to the methods such as flocculent precipitation, the traditional chemical precipitator method, electrolytic process.A., when Shafaei etc. are with the waste water of electrolytic process process manganese mass concentration within 100 mg/L, more than 90% is reached to the clearance of manganese, but poor for the treatment effect of high concentration manganese-containingwastewater wastewater.Utilize lime+PAC coagulant sedimentation process Mn-bearing waste water, manganese mass concentration drops to 0.2mg/L by 397mg/L.Treatment research for acid wastewater in mine shows, adopts the report of Wingdale, lime segmentation neutralization precipitation, Coagulation Method combination process process high-concentration acidic wastewater Mn-bearing waste water less.
According to the requirement of receiving water body and environmental administration, primary standard in the highest permission emission concentration of Equations of The Second Kind pollutent in draining strict implement " waste water comprehensive discharge standard " (GB 8978-1996), namely pH be 6 ~ 9, Mn≤2 mg/L, SS≤70 mg/L.
Summary of the invention
The object of the present invention is to provide a kind of Treatment of Wastewater With Manganese method, the manganese waste water of high density can be reached the emission standard that pH is 7-9, Mn≤1 mg/L, SS≤40mg/L.
Object of the present invention is achieved through the following technical solutions: Treatment of Wastewater With Manganese method, is characterized in that: comprise the following steps:
A, adjustment Mn-bearing waste water: Mn-bearing waste water is discharged into equalizing tank after filtering;
B, a lime sedimentation manganese waste water: the Mn-bearing waste water in equalizing tank is discharged in reaction tank 1, and adds lime in reaction tank 1, make the pH value of Mn-bearing waste water reach 6.0, and continuously stirring more than 1 hour;
C, sediment separate out: the material in reaction tank 1 is extracted in pressure filter and carries out mud-water separation, the water outlet of pressure filter enters reaction tank 2, and the mud of pressure filter enters recycle bin;
D, secondary lime sedimentation manganese waste water: in reaction tank 2, inject lime, make the pH value of Mn-bearing waste water reach 12.0, and continuously stirring more than 1 hour, postprecipitation more than 2 hours, get supernatant liquor in reaction tank 2 and enter coagulative precipitation tank;
E, qualified discharge: in coagulative precipitation tank, add sulfuric acid, regulate wastewater pH to 8.0, then the polymeric aluminum chlorides solution that massfraction is 10% to 20% is added, stir after more than 30 minutes and add the polyacrylamide solution continuation stirring more than 30 minutes that massfraction is 0.1% to 0.5%, again after the precipitation of more than 2 hours, supernatant liquor up to standard is discharged.
Original Mn-bearing waste water pH is 2.5 ~ 3.5, Mn be 1 600 ~ 2 000 mg/L, SS is 180 ~ 220 mg/L; After above-mentioned processing step process, the pH of discharge water is 6 ~ 9, Mn≤1.8 mg/L, SS≤68 mg/L.The medicament expense of 20% ~ 30% can be saved than independent lime.
Manganese discharge of wastewater national standard is: pH is 6 ~ 9, Mn≤2 mg/L, SS≤70 mg/L.
Preferably, in the process that step D carries out, also in reaction tank 2, add the mud having and separate from pressure filter.After adding mud, in final outflow water, the mass concentration of manganese is 0.1 mg/L, SS is 40 mg/L.The medicament expense of 30% ~ 40% can be saved than independent lime.
In the process that step D carries out, also add in reaction tank 2 and have component P, the mud that component P comprises fine sand and separates from pressure filter.After adding component P, in final outflow water, the mass concentration of manganese is 0.05 mg/L, SS is 10 mg/L.The medicament expense of 35% ~ 45% can be saved than independent lime.
Preferably, the massfraction of the mud added in reaction tank 2 is 5% to 10%.
Preferably, in the process that step e is carried out, in coagulative precipitation tank, the mud having and separate from pressure filter is also added.After adding mud, in final outflow water, the mass concentration of manganese is 0.1 mg/L, SS is 45mg/L.The medicament expense of 30% ~ 40% can be saved than independent lime.
Preferably, the massfraction of the mud added in coagulative precipitation tank is 2% to 8%.
Preferably, in the process that step e is carried out, the massfraction of described polymeric aluminum chlorides solution is 15%.
The invention has the advantages that: structure is simple, and cost is low, simple and quick, can improve displacement mass.
Accompanying drawing explanation
Fig. 1 is the step process intention of invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1:
As shown in Figure 1,
Treatment of Wastewater With Manganese method, comprises the following steps:
A, adjustment Mn-bearing waste water: Mn-bearing waste water is discharged into equalizing tank after filtering;
B, a lime sedimentation manganese waste water: the Mn-bearing waste water in equalizing tank is discharged in reaction tank 1, and adds lime in reaction tank 1, make the pH value of Mn-bearing waste water reach 6.0, and continuously stirring more than 1 hour;
C, sediment separate out: the material in reaction tank 1 is extracted in pressure filter and carries out mud-water separation, the water outlet of pressure filter enters reaction tank 2, and the mud of pressure filter enters recycle bin;
D, secondary lime sedimentation manganese waste water: in reaction tank 2, inject lime, make the pH value of Mn-bearing waste water reach 12.0, and continuously stirring more than 1 hour, postprecipitation more than 2 hours, get supernatant liquor in reaction tank 2 and enter coagulative precipitation tank;
E, qualified discharge: in coagulative precipitation tank, add sulfuric acid, regulate wastewater pH to 8.0, then the polymeric aluminum chlorides solution that massfraction is 10% to 20% is added, stir after more than 30 minutes and add the polyacrylamide solution continuation stirring more than 30 minutes that massfraction is 0.1% to 0.5%, again after the precipitation of more than 2 hours, supernatant liquor up to standard is discharged.
Original Mn-bearing waste water pH is 2.5 ~ 3.5, Mn be 1 600 ~ 2 000 mg/L, SS is 180 ~ 220 mg/L; After above-mentioned processing step process, the pH of discharge water is 6 ~ 9, Mn≤1.8 mg/L, SS≤68 mg/L.The medicament expense of 20% ~ 30% can be saved than independent lime.
Namely pH be 6 ~ 9, Mn≤2 mg/L, SS≤70 mg/L
Preferably, in the process that step D carries out, also in reaction tank 2, add the mud having and separate from pressure filter.After adding mud, in final outflow water, the mass concentration of manganese is 0.1 mg/L, SS is 40 mg/L.The medicament expense of 30% ~ 40% can be saved than independent lime.
In the process that step D carries out, also add in reaction tank 2 and have component P, the mud that component P comprises fine sand and separates from pressure filter.After adding component P, in final outflow water, the mass concentration of manganese is 0.05 mg/L, SS is 10 mg/L.The medicament expense of 35% ~ 45% can be saved than independent lime.
Preferably, the massfraction of the mud added in reaction tank 2 is 5% to 10%.
Preferably, in the process that step e is carried out, in coagulative precipitation tank, the mud having and separate from pressure filter is also added.After adding mud, in final outflow water, the mass concentration of manganese is 0.1 mg/L, SS is 45mg/L.The medicament expense of 30% ~ 40% can be saved than independent lime.
Preferably, the massfraction of the mud added in coagulative precipitation tank is 2% to 8%.
Preferably, in the process that step e is carried out, the massfraction of described polymeric aluminum chlorides solution is 15%.
As mentioned above, then well the present invention can be realized.
Claims (7)
1. Treatment of Wastewater With Manganese method, is characterized in that: comprise the following steps:
A, adjustment Mn-bearing waste water: Mn-bearing waste water is discharged into equalizing tank after filtering;
B, a lime sedimentation manganese waste water: the Mn-bearing waste water in equalizing tank is discharged in reaction tank 1, and adds lime in reaction tank 1, make the pH value of Mn-bearing waste water reach 6.0, and continuously stirring more than 1 hour;
C, sediment separate out: the material in reaction tank 1 is extracted in pressure filter and carries out mud-water separation, the water outlet of pressure filter enters reaction tank 2, and the mud of pressure filter enters recycle bin;
D, secondary lime sedimentation manganese waste water: in reaction tank 2, inject lime, make the pH value of Mn-bearing waste water reach 12.0, and continuously stirring more than 1 hour, postprecipitation more than 2 hours, get supernatant liquor in reaction tank 2 and enter coagulative precipitation tank;
E, qualified discharge: in coagulative precipitation tank, add sulfuric acid, regulate wastewater pH to 8.0, then the polymeric aluminum chlorides solution that massfraction is 10% to 20% is added, stir after more than 30 minutes and add the polyacrylamide solution continuation stirring more than 30 minutes that massfraction is 0.1% to 0.5%, again after the precipitation of more than 2 hours, supernatant liquor up to standard is discharged.
2. Treatment of Wastewater With Manganese method according to claim 1, is characterized in that: in the process that step D carries out, and also in reaction tank 2, adds the mud having and separate from pressure filter.
3. Treatment of Wastewater With Manganese method according to claim 1, is characterized in that: in the process that step D carries out, and also adding in reaction tank 2 has component P, the mud that component P comprises fine sand and separates from pressure filter.
4. the Treatment of Wastewater With Manganese method according to Claims 2 or 3, is characterized in that: the massfraction of the mud added in reaction tank 2 is 5% to 10%.
5. Treatment of Wastewater With Manganese method according to claim 1, is characterized in that: in the process that step e is carried out, in coagulative precipitation tank, also add the mud having and separate from pressure filter.
6. Treatment of Wastewater With Manganese method according to claim 5, is characterized in that: the massfraction of the mud added in coagulative precipitation tank is 2% to 8%.
7. according to the Treatment of Wastewater With Manganese method in claim 1-6 described in any one, it is characterized in that: in the process that step e is carried out, the massfraction of described polymeric aluminum chlorides solution is 15%.
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| CN201510211084.8A CN104829005A (en) | 2015-04-29 | 2015-04-29 | Manganese-containing wastewater processing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293791A (en) * | 2015-10-10 | 2016-02-03 | 贵州万山兴隆锰业有限公司 | Treatment method for manganese ore wastewater |
| CN106396056A (en) * | 2016-10-27 | 2017-02-15 | 长沙矿冶研究院有限责任公司 | Method for treating electrolytic manganese wastewater containing manganese and magnesium and recovering manganese from wastewater |
| CN106745791A (en) * | 2017-03-24 | 2017-05-31 | 湖南科技大学 | Treatment of Wastewater With Manganese device and processing method |
| CN113526724A (en) * | 2021-07-08 | 2021-10-22 | 南方锰业集团有限责任公司大新锰矿分公司 | Low-concentration ammonia nitrogen manganese wastewater treatment system and method using manganese tailings |
-
2015
- 2015-04-29 CN CN201510211084.8A patent/CN104829005A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293791A (en) * | 2015-10-10 | 2016-02-03 | 贵州万山兴隆锰业有限公司 | Treatment method for manganese ore wastewater |
| CN106396056A (en) * | 2016-10-27 | 2017-02-15 | 长沙矿冶研究院有限责任公司 | Method for treating electrolytic manganese wastewater containing manganese and magnesium and recovering manganese from wastewater |
| CN106396056B (en) * | 2016-10-27 | 2019-08-27 | 长沙矿冶研究院有限责任公司 | Handle method magnesium eletrolysis containing manganese manganese waste water and recycle Manganese in Waste Water |
| CN106745791A (en) * | 2017-03-24 | 2017-05-31 | 湖南科技大学 | Treatment of Wastewater With Manganese device and processing method |
| CN113526724A (en) * | 2021-07-08 | 2021-10-22 | 南方锰业集团有限责任公司大新锰矿分公司 | Low-concentration ammonia nitrogen manganese wastewater treatment system and method using manganese tailings |
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