CN104045197A - Non-ferrous mine waste water treatment method - Google Patents
Non-ferrous mine waste water treatment method Download PDFInfo
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- CN104045197A CN104045197A CN201410312572.3A CN201410312572A CN104045197A CN 104045197 A CN104045197 A CN 104045197A CN 201410312572 A CN201410312572 A CN 201410312572A CN 104045197 A CN104045197 A CN 104045197A
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Abstract
The invention discloses a non-ferrous mine waste water treatment method. The method comprises the following steps: regulating the pH value of mine waste water to be 8-10, feeding coagulation chemicals for coagulation and standing precipitation; applying ultrasonic wave and leading in ozone into the precipitated supernatant, so as to conduct advanced ultrasonic/ozone synergism oxidization reaction; feeding coagulation chemicals into effluent water after reaction for conducting secondary coagulation precipitation; leading ozone into the precipitated supernatant in the presence of activated carbon for conducting ozone/activated carbon catalytic oxidation, enabling the oxidized effluent water to return the production technology process, or emission after meeting the standard. According to the characteristics of the non-ferrous mine waste water being complicated in quality and difficult to treat, the waste water is synergistically treated by combining the ultrasonic wave/ozone advanced oxidization technology, ozone/activated carbon catalytic oxidization technology and coagulation precipitation technology, so that the treatment effect is good, the treatment efficiency is high, the system runs stably, the technology flow is simple so as to realize industrial application, especially, the non-ferrous mine waste water treatment method has advantages which cannot be achieved by other methods for the difficultly treated non-ferrous mine waste water.
Description
Technical field
The present invention relates to environmental protection technology and water-treatment technology field, particularly a kind for the treatment of process of nonferrous mine waste water.
Background technology
Nonferrous mine waste water mainly comprises mining pit water and beneficiation wastewater, wherein beneficiation wastewater accounts for most proportion, nonferrous mine waste water quality complexity, composition is various, contain various heavy, organic medicament and other pollution substances, if outer row will produce serious harm to surrounding ecotope, if returned in Production Flow Chart, along with the objectionable impurities in waste water will constantly be accumulated, also can produce adverse influence to production technique and equipment, therefore, need to select suitable treatment process to process these waste water.At present, conventional treatment process has chemical precipitation method, absorption method, microbial method, artificial swamp method etc., although it is certain that these treatment processs have advantages of separately, but be generally subject to the restriction of the factors such as mine working condition, envrionment conditions or processing requirements, for example, adopt chemical precipitation method heavy metal treatment effect relatively better, but organic substance poor processing effect; Absorption method can effectively be processed heavy metal wastewater thereby, but when adsorbent reactivation, pollutent can regenerate again; Microbial method processing cost is relatively low, but reaction conditions requirement is harsher, is difficult to be widely applied; Wetland method area occupied is large, and long processing period is also difficult to meet processing requirements.Therefore, a kind of reasonable, effective, practical nonferrous mine method of wastewater treatment of How to choose, is the difficult problem that current metal mine enterprise generally faces.
Summary of the invention
Object of the present invention is exactly the problems referred to above that exist for existing treatment process, and the nonferrous mine that a kind of technical process is simple, treatment effect good, processing efficiency is high method of wastewater treatment is provided.
The present invention includes following steps:
(1) under whipped state, regulate between mine wastewater pH to 9～11, if the original pH of waste water is between this, can regulate, add successively flocculation agent and flocculation agent and carry out coagulating sedimentation, after coagulation, stop stirring standing 15min～120min;
(2) get the supernatant liquor after precipitation, apply ultrasonic wave and pass into ozone and carry out ultrasonic/ozone cooperative advanced oxidation reaction, the reaction times is 30min～120min;
(3) after oxidizing reaction, waste water adds successively flocculation agent and flocculation agent carries out coagulating sedimentation under whipped state, stops stirring leaving standstill 15min～120min after coagulation;
(4) get the supernatant liquor after precipitation, pass into ozone and carry out catalytic ozonation reaction having under gac existence condition, the reaction times is 30min～120min;
(5) reacted water outlet is returned in the technological process of production or qualified discharge.
In described step (1), stirring linear velocity is 0.01m/s～10m/s, regulating the medicament of pH is sulfuric acid, hydrochloric acid, sodium hydroxide or milk of lime, flocculation agent is inorganic salts flocculation agent or the polymer coagulant such as molysite, aluminium salt, flocculation agent is high polymer polyacrylamide, and flocculation agent and flocculation agent all wiring solution-forming state add.
In described step (2), ultrasonic frequency is 20kHz～750kHz, ultrasonic power and ozone intake according to COD content in influent quality how many and effluent quality requirement determine, COD content is high, processing index request is tight, the corresponding increase of hyperacoustic power, corresponding the increasing of intake of ozone, otherwise, COD content is low, processing index request pine, and hyperacoustic power is corresponding to be reduced, the corresponding minimizing of intake of ozone.
In described step (3), stirring linear velocity is 0.01m/s～10m/s, and flocculation agent is inorganic salts flocculation agent or the polymer coagulant such as molysite, aluminium salt, and flocculation agent is high polymer polyacrylamide, and flocculation agent and flocculation agent all wiring solution-forming state add.
In described step (4), gac is coconut husk charcoal or ature of coal charcoal, ozone intake according to the COD content in influent quality how many and processing requirements determine, COD content is high, processing index request is tight, corresponding the increasing of intake of ozone, otherwise COD content is low, processing index request pine, the corresponding minimizing of intake of ozone.
Beneficial effect of the present invention:
The present invention is according to nonferrous mine waste water quality complexity, unmanageable feature, ultrasonic wave/ozone high grade oxidation technology, ozone and active carbon catalyzed oxidation technology and coagulating sedimentation technology are combined to work in coordination with waste water is processed, treatment effect is good, processing efficiency is high, system run all right, technical process is simple, be convenient to realize industrial application, particularly there is the unapproachable advantage of additive method for unmanageable nonferrous mine waste water.
Embodiment
The present invention includes following steps:
(1) under whipped state, regulate between mine wastewater pH to 9～11, if the original pH of waste water is between this, can regulate, add successively flocculation agent and flocculation agent and carry out coagulating sedimentation, after coagulation, stop stirring standing 15min～120min;
(2) get the supernatant liquor after precipitation, apply ultrasonic wave and pass into ozone and carry out ultrasonic/ozone cooperative advanced oxidation reaction, the reaction times is 30min～120min;
(3) after oxidizing reaction, waste water adds successively flocculation agent and flocculation agent carries out coagulating sedimentation under whipped state, stops stirring leaving standstill 15min～120min after coagulation;
(4) get the supernatant liquor after precipitation, pass into ozone and carry out catalytic ozonation reaction having under gac existence condition, the reaction times is 30min～120min;
(5) reacted water outlet is returned in the technological process of production or qualified discharge.
In described step (1), stirring linear velocity is 0.01m/s～10m/s, regulating the medicament of pH is sulfuric acid, hydrochloric acid, sodium hydroxide or milk of lime, flocculation agent is inorganic salts flocculation agent or the polymer coagulant such as molysite, aluminium salt, flocculation agent is high polymer polyacrylamide, and flocculation agent and flocculation agent all wiring solution-forming state add.
In described step (2), ultrasonic frequency is 20kHz～750kHz, ultrasonic power and ozone intake according to COD content in influent quality how many and effluent quality requirement determine, COD content is high, processing index request is tight, the corresponding increase of hyperacoustic power, corresponding the increasing of intake of ozone, otherwise, COD content is low, processing index request pine, and hyperacoustic power is corresponding to be reduced, the corresponding minimizing of intake of ozone.
In described step (3), stirring linear velocity is 0.01m/s～10m/s, and flocculation agent is inorganic salts flocculation agent or the polymer coagulant such as molysite, aluminium salt, and flocculation agent is high polymer polyacrylamide, and flocculation agent and flocculation agent all wiring solution-forming state add.
In described step (4), gac is coconut husk charcoal or ature of coal charcoal, ozone intake according to the COD content in influent quality how many and processing requirements determine, COD content is high, processing index request is tight, corresponding the increasing of intake of ozone, otherwise COD content is low, processing index request pine, the corresponding minimizing of intake of ozone.
Specific examples 1:
Certain nonferrous mine waste water, pH is that 6.8, COD is 566.4mg/L, and cupric ion is 18.6mg/L, and zine ion is 10.5mg/L, contains in addition other heavy metal ion of trace.Getting this mine wastewater 3L with jar is placed under stirrer, be that under 0.8m/s condition, the sodium hydroxide solution with 1% regulates wastewater pH to 9.0 stirring linear velocity, the polymeric aluminum chlorides solution 8mL that adds 10g/L stirs 5min, then add 0.5 ‰ anionic polyacrylamide solution 4mL, after continuing to stir 2min, regulate stirring linear velocity 0.1m/s to stir 5min, stop stirring, leave standstill 15min, supernatant liquor is pumped in the reactor that ultrasonic unit and ozonation aerated device are housed with peristaltic pump, ultrasonic probe diameter 5mm, be placed in 20mm place under waste water liquid level, ultrasonic frequency is 20kHz, power is 50W, ozone adopts Ti-alloyed filter element micro-pore aeration, be placed in reactor bottom, reaction starts to open Vltrasonic device, pass into ozone reaction 30min, ozone intake is 50mg/L, it is under 0.8m/s condition stirring linear velocity that reaction finishes rear taking-up water, the polymeric aluminum chlorides solution 5mL that adds 10g/L stirs 5min, then add 0.5 ‰ anionic polyacrylamide solution 2mL, after continuing to stir 2min, regulate stirring linear velocity 0.1m/s to stir 5min, stop stirring, leave standstill 15min, supernatant liquor is pumped in the reactor that gac and ozonation aerated device are housed with peristaltic pump, gac amount of fill is 30g, ozone adopts Ti-alloyed filter element micro-pore aeration, be placed in reactor bottom, reaction starts to pass into ozone reaction 30min, reacted water outlet by analysis pH is 8.5, COD is 9.5mg/L, cupric ion < 0.01mg/L, zine ion < 0.01mg/L, first kind pollutent is all within the highest permission emission concentration limit value, after processing, water quality can reach reuse or emission standard.
Specific examples 2:
Certain nonferrous mine waste water, pH is that 6.8, COD is 875.4mg/L, and cupric ion is 87.4mg/L, and lead ion is 43.2mg/L, and zine ion is 17.5mg/L, contains in addition other heavy metal ion of trace.Getting this mine wastewater 3L with jar is placed under stirrer, be that under 0.8m/s condition, the sodium hydroxide solution with 1% regulates wastewater pH to 9.0 stirring linear velocity, the polymeric aluminum chlorides solution 12mL that adds 10g/L stirs 5min, then add 0.5 ‰ anionic polyacrylamide solution 5mL, after continuing to stir 2min, regulate stirring linear velocity 0.1m/s to stir 5min, stop stirring, leave standstill 15min, supernatant liquor is pumped in the reactor that ultrasonic unit and ozonation aerated device are housed with peristaltic pump, ultrasonic probe diameter 5mm, be placed in 20mm place under waste water liquid level, ultrasonic frequency is 20kHz, power is 50W, ozone adopts Ti-alloyed filter element micro-pore aeration, be placed in reactor bottom, reaction starts to open Vltrasonic device, pass into ozone reaction 30min, ozone intake is 80mg/L, it is under 0.8m/s condition stirring linear velocity that reaction finishes rear taking-up water, the polymeric aluminum chlorides solution 5mL that adds 10g/L stirs 5min, then add 0.5 ‰ anionic polyacrylamide solution 2mL, after continuing to stir 2min, regulate stirring linear velocity 0.1m/s to stir 5min, stop stirring, leave standstill 15min, supernatant liquor is pumped in the reactor that gac and ozonation aerated device are housed with peristaltic pump, gac amount of fill is 30g, ozone adopts Ti-alloyed filter element micro-pore aeration, be placed in reactor bottom, reaction starts to pass into ozone reaction 30min, reacted water outlet by analysis pH is 8.6, COD is 12.7mg/L, cupric ion < 0.01mg/L, zine ion < 0.01mg/L, first kind pollutent is all within the highest permission emission concentration limit value, after processing, water quality can reach reuse or emission standard.
Claims (8)
1. a nonferrous mine method of wastewater treatment, the method comprises the following steps:
(1) under whipped state, regulate between mine wastewater pH to 9～11, if the original pH of waste water is between this, can regulate, add successively flocculation agent and flocculation agent and carry out coagulating sedimentation, after coagulation, stop stirring standing 15min～120min;
(2) get the supernatant liquor after precipitation, apply ultrasonic wave and pass into ozone and carry out ultrasonic/ozone cooperative advanced oxidation reaction, the reaction times is 30min～120min;
(3) after oxidizing reaction, waste water adds successively flocculation agent and flocculation agent carries out coagulating sedimentation under whipped state, stops stirring leaving standstill 15min～120min after coagulation;
(4) get the supernatant liquor after precipitation, pass into ozone and carry out catalytic ozonation reaction having under gac existence condition, the reaction times is 30min～120min;
(5) reacted water outlet is returned in the technological process of production or qualified discharge.
2. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (1), stirring linear velocity is 0.01m/s～10m/s.
3. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (1), regulating the medicament of pH is sulfuric acid, hydrochloric acid, sodium hydroxide or milk of lime, flocculation agent is molysite, aluminium salt inorganic salts flocculation agent or polymer coagulant, flocculation agent is high polymer polyacrylamide, and flocculation agent and flocculation agent all wiring solution-forming state add.
4. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (2), ultrasonic frequency is 20kHz～750kHz.
5. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (2), ultrasonic power and ozone intake according to COD content in influent quality how many and effluent quality requirement determine, COD content is high, processing index request is tight, the corresponding increase of hyperacoustic power, corresponding the increasing of intake of ozone, otherwise, COD content is low, processing index request pine, and hyperacoustic power is corresponding to be reduced, the corresponding minimizing of intake of ozone.
6. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (3), stirring linear velocity is 0.01m/s～10m/s.
7. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (4), gac is coconut husk charcoal or ature of coal charcoal.
8. according to a kind of nonferrous mine method of wastewater treatment described in claims 1, it is characterized in that: in described step (4), ozone intake according to the COD content in influent quality how many and processing requirements determine, COD content is high, processing index request is tight, corresponding the increasing of intake of ozone, otherwise COD content is low, processing index request pine, the corresponding minimizing of intake of ozone.
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Cited By (5)
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| CN104291538A (en) * | 2014-11-13 | 2015-01-21 | 长春黄金研究院 | Cyanide waste residue leaching solution treating method |
| CN104909498A (en) * | 2015-06-07 | 2015-09-16 | 长春黄金研究院 | Comprehensive treatment method for flotation wastewater of gold industry |
| CN105399237A (en) * | 2015-11-11 | 2016-03-16 | 紫金矿业集团股份有限公司 | Treatment method for copper-containing gold ore cyaniding waste water |
| CN107082519A (en) * | 2017-06-22 | 2017-08-22 | 吉林大学 | A kind of preprocessing system and method to the pollutant waste water of water soluble polymer containing difficult degradation |
| CN112679005A (en) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | Heavy metal-containing high COD wastewater treatment method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291538A (en) * | 2014-11-13 | 2015-01-21 | 长春黄金研究院 | Cyanide waste residue leaching solution treating method |
| CN104291538B (en) * | 2014-11-13 | 2016-06-08 | 长春黄金研究院 | A kind of cyaniding waste residue leaching liquor treatment process |
| CN104909498A (en) * | 2015-06-07 | 2015-09-16 | 长春黄金研究院 | Comprehensive treatment method for flotation wastewater of gold industry |
| CN105399237A (en) * | 2015-11-11 | 2016-03-16 | 紫金矿业集团股份有限公司 | Treatment method for copper-containing gold ore cyaniding waste water |
| CN107082519A (en) * | 2017-06-22 | 2017-08-22 | 吉林大学 | A kind of preprocessing system and method to the pollutant waste water of water soluble polymer containing difficult degradation |
| CN112679005A (en) * | 2019-10-17 | 2021-04-20 | 中国石油化工股份有限公司 | Heavy metal-containing high COD wastewater treatment method |
| CN112679005B (en) * | 2019-10-17 | 2023-04-07 | 中国石油化工股份有限公司 | Heavy metal-containing high COD wastewater treatment method |
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