CN104445842B - A kind of cyanide wastewater synthetical recovery processing method - Google Patents
A kind of cyanide wastewater synthetical recovery processing method Download PDFInfo
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Abstract
The invention discloses a kind of cyanide wastewater synthetical recovery processing method, the method is made up of resin adsorption method, Ozonation, coagulant sedimentation and biofilter treatment technology, cyanide wastewater is when processing, first select resin that the cyanide in waste water carries out absorption to reclaim, waste water after absorption passes into ozone and carries out oxidation processes, waste water after oxidation removes the pollutant such as suspended particulate substance, heavy metal ion in waste water by coagulating sedimentation, and the supernatant after precipitation adopts biological filter chamber treatment system to remove pollutant remaining in waste water. The present invention is high according to the Cyanide in Cyanide Wastewater concentration produced in golden production process, pollutant kind feature complicated, intractable, resin adsorption method, Ozonation, coagulant sedimentation and biofilter treatment technology are combined, work in coordination with and gold manufacturing enterprises cyanide wastewater is carried out advanced treating, have high treating effect, treatment effeciency height, system run all right, technological process is simple, facilitate implementation the advantages such as commercial Application, and the waste water after process can return to the technological process of production and uses or qualified discharge as recycled water.
Description
Technical field
The present invention relates to field of Environment Protection Pollutant Treatment method, particularly to a kind of cyanide wastewater synthetical recovery processing method.
Background technology
Gold manufacturing enterprises is in process of production owing to using Cyanide Process, substantial amounts of cyanide wastewater can be produced, these waste water do not contain only substantial amounts of severe toxicity cyanide, but also the heavy metal ion containing rhodanate and copper, zinc, lead etc, if can not get effective process, it will produce great environmental protection hidden danger. At present, the method of conventional Treatment of Cyanide-containing Wastewater has acidifying absorption method, Pomolio-Celdecor process, Yin Kefa, sulfur dioxide method etc. both at home and abroad, although adopting acidifying absorption method can reclaim a certain amount of cyanide, but owing to recovery of cyanide is not thorough, the remaining a certain amount of cyanide of meeting in waste water, thiocyanate radical and some heavy metal ion are all without effectively being removed simultaneously. Pomolio-Celdecor process process after can remaining substantial amounts of chlorine residue, produce ClCN product, cause secondary pollution problem, the heavy metal ion such as the copper in waste water, zinc, lead fails effectively to be administered simultaneously. Although Yin Kefa and sulfur dioxide method can make cyanid up to standard, but the rhodanate in waste water fails to be processed, additionally, it is also more to process the waste residue produced in heavy metal process, it is easy to cause secondary pollution. Therefore, in cyanide wastewater process, also still lacking more satisfactory method, if resolving this problem, the sustainable development of China's gold industry and the environmental conservation of gold mine will be had important meaning.
Summary of the invention
The purpose of the present invention is aiming at the problems referred to above that existing processing method exists, and provides the cyanide wastewater synthetical recovery processing method that a kind of technological process is simple, high treating effect, treatment effeciency are high, stable. The present invention is according to the feature containing the multiple pollutants such as cyanide, rhodanate and heavy metal in gold manufacturing enterprises cyanide wastewater, first select resin that the cyanide in waste water carries out absorption to reclaim, waste water after absorption passes into ozone and carries out oxidation processes, waste water after oxidation removes the pollutant such as suspended particulate substance, heavy metal ion in waste water by coagulating sedimentation, and the supernatant after precipitation adopts biological filter chamber treatment system to remove pollutant remaining in waste water.Concrete technology step of the present invention is as follows:
(1), by cyanide wastewater pumping into resin absorbing column and carry out adsorption treatment, adsorbent hydroxyl aluminum is 0.5��20h;
(2), adsorb saturated after resin send in pickling post, add pickle, under 30��40 DEG C of conditions of temperature, pass into air and carry out acidifying stripping process, the gas sodium hydroxide solution of stripping absorbs, absorbing liquid to return in golden production technological process, the resin after pickling carries out Regeneration Treatment, is then fed in resin absorbing column;
(3) cyanide wastewater, after resin absorption enters ozone treating system, passes into ozone and carries out oxidation processes, and the process time is 0.25��2h;
(4) waste water, after oxidation reaction adds flocculating agent under stirring successively and flocculant carries out coagulating sedimentation, and after coagulation, waste water enters sedimentation tank and staticly settles 0.25��2h;
(5), precipitation after supernatant enter biological filter chamber treatment system, when biologic packing material, biofilm strain and air aeration, carry out a biological disposal upon;
(6) waste water after, having processed returns in the technological process of production or qualified discharge.
In described step (1), resin is strongly basic anionic resin.
In described step (2), pickle is sulphuric acid or hydrochloric acid solution, and pH value is between 2��3, and the gas-liquid-solid of air, pickle and resin is than being (100��5000): (2��10): 1.
In described step (3), ozone intake according to the cyanide in waste liquid and COD content number and determine, cyanide and COD content are high, and the intake of ozone increases accordingly, otherwise, cyanide and COD content are low, and the intake of ozone reduces accordingly.
In described step (4), flocculating agent is polymer-inorganic salt flocculating agent, and flocculant is that polyacrylamide, flocculating agent and flocculant are all configured to solution state and add.
In described step (5), biological filter chamber treatment system is up flow type reaction tank, water-distributing device and aerator it is provided with at the bottom of pond, aerator is arranged above activated carbon, zeolite or biological potsherd filling layer, loadings accounts for the 1/5��4/5 of reactor volume, biofilm strain is for dropping cyanogen flora, including pseudomonas fluorescens, pseudomonas putida, Pseudomonas stutzeri, Nocard's bacillus, bacillus cereus etc., it is collected near Tailings Dam in topsoil, strain biofilm mode is taked manually to add strain biofilm or Biofilmculturing, and gas liquid ratio is set as 1��15:1.
Beneficial effects of the present invention:
The present invention is high according to the Cyanide in Cyanide Wastewater concentration produced in golden production process, pollutant kind feature complicated, intractable, resin adsorption method, Ozonation, coagulant sedimentation and biofilter treatment technology are combined, work in coordination with and cyanide wastewater is carried out advanced treating, have high treating effect, treatment effeciency height, system run all right, technological process is simple, facilitate implementation the advantages such as commercial Application, and the waste water after process can return to the technological process of production and uses or qualified discharge as recycled water.
Detailed description of the invention
The present invention comprises the following steps:
(1), by cyanide wastewater pumping into resin absorbing column and carry out adsorption treatment, adsorbent hydroxyl aluminum is 0.5��20h;
(2), adsorb saturated after resin send in pickling post, add pickle, under 30��40 DEG C of conditions of temperature, pass into air and carry out acidifying stripping process, the gas sodium hydroxide solution of stripping absorbs, absorbing liquid to return in golden production technological process, the resin after pickling carries out Regeneration Treatment, is then fed in resin absorbing column;
(3) cyanide wastewater, after resin absorption enters ozone treating system, passes into ozone and carries out oxidation processes, and the process time is 0.25��2h;
(4) waste water, after oxidation reaction adds flocculating agent under stirring successively and flocculant carries out coagulating sedimentation, and after coagulation, waste water enters sedimentation tank and staticly settles 0.25��2h;
(5), precipitation after supernatant enter biological filter chamber treatment system, when biologic packing material, biofilm strain and air aeration, carry out a biological disposal upon;
(6) waste water after, having processed returns in the technological process of production or qualified discharge.
In described step (1), resin is strongly basic anionic resin.
In described step (2), pickle is sulphuric acid or hydrochloric acid solution, and pH value is between 2��3, and the gas-liquid-solid of air, pickle and resin is than being (100��5000): (2��10): 1.
In described step (3), ozone intake according to the cyanide in waste liquid and COD content number and determine, cyanide and COD content are high, and the intake of ozone increases accordingly, otherwise, cyanide and COD content are low, and the intake of ozone reduces accordingly.
In described step (4), flocculating agent is polymer-inorganic salt flocculating agent, and flocculant is that polyacrylamide, flocculating agent and flocculant are all configured to solution state and add.
In described step (5), biological filter chamber treatment system is up flow type reaction tank, water-distributing device and aerator it is provided with at the bottom of pond, aerator is arranged above activated carbon, zeolite or biological potsherd filling layer, loadings accounts for the 1/5��4/5 of reactor volume, biofilm strain is for dropping cyanogen flora, including pseudomonas fluorescens, pseudomonas putida, Pseudomonas stutzeri, Nocard's bacillus, bacillus cereus etc., it is collected near Tailings Dam in topsoil, strain biofilm mode is taked manually to add strain biofilm or Biofilmculturing, and gas liquid ratio is set as 1��15:1.
Instantiation 1:
Certain gold mine cyanide wastewater, pH is 10.8, CNTFor 657.26mg/L, SCN��For 176.56mg/L, Cu2+For 123.42mg/L, Fe3+It is 870.28mg/L for 48.45mg/L, COD, additionally contains other heavy metal ion of trace. 5L cyanide wastewater is pumped into resin absorbing column and carries out adsorption treatment, resin absorbing column is filled strong alkalinity anion adsorbent resin, waste water adsorbent hydroxyl aluminum is 2h, waste water after absorption is placed in ozone-oxidizing device, ozone-oxidizing device interior bottom portion is provided with ceramic micropore aerator, open ozonator, pass into ozone reaction 30min, ozone intake is 850mg, reaction stops passing into ozone after terminating, waste water is moved in agitator tank, open stirring, 5min is stirred stirring the polymeric aluminum chlorides solution 15mL adding 10g/L when linear velocity is 0.8m/s, then 0.5 �� PAMA solution 5mL are added, regulate stirring linear velocity 0.1m/s after continuing stirring 2min and stir 5min, stop stirring, stand 30min, with peristaltic pump supernatant is moved in biological filter chamber treatment system and processes, biological filter chamber treatment system adopts up flow type, filling filler is particulate coal activated carbon, loadings is 5kg, air aeration device adopts Ti-alloyed filter element, it is placed in reactor bottom, gas liquid ratio is set as 3:1, reactor carries out biofilm by manually adding strain, the waste water reaction time of staying is 60min. waste water through system process after water outlet through assay pH between 8��9, CNT< 0.1mg/L, SCN��< 0.5mg/L, Cu2+< 0.5mg/L, COD < 20mg/L, first kind pollutant are all within the highest permission concentration of emission limit value, and after process, water quality can reach reuse or discharge standard.
Instantiation 2:
Certain gold mine is containing cyanogen, and pH is 10.2, CNTFor 365.42mg/L, SCN��For 123.78mg/L, Cu2+For 25.43mg/L, Fe3+For 57.55mg/L, Zn2+It is 498.69mg/L for 14.43mg/L, COD, additionally contains other heavy metal ion of trace. 5L cyanide wastewater is pumped into resin absorbing column and carries out adsorption treatment, resin absorbing column is filled strong alkalinity anion adsorbent resin, waste water adsorbent hydroxyl aluminum is 2h, waste water after absorption is placed in ozone-oxidizing device, ozone-oxidizing device interior bottom portion is provided with ceramic micropore aerator, open ozonator, pass into ozone reaction 30min, ozone intake is 550mg, reaction stops passing into ozone after terminating, waste water is moved in agitator tank, open stirring, 5min is stirred stirring the polymeric aluminum chlorides solution 15mL adding 10g/L when linear velocity is 0.8m/s, then 0.5 �� PAMA solution 5mL are added, regulate stirring linear velocity 0.1m/s after continuing stirring 2min and stir 5min, stop stirring, stand 30min, with peristaltic pump supernatant is moved in biological filter chamber treatment system and processes, biological filter chamber treatment system adopts up flow type, filling filler is particulate coal activated carbon, loadings is 5kg, air aeration device adopts Ti-alloyed filter element, it is placed in reactor bottom, gas liquid ratio is set as 3:1, reactor carries out biofilm by manually adding strain, the waste water reaction time of staying is 60min. waste water through system process after water outlet through assay pH between 8��9, CNT< 0.1mg/L, SCN��< 0.5mg/L, Cu2+< 0.5mg/L, Zn2+< 1mg/L, COD < 20mg/L, first kind pollutant are all within the highest permission concentration of emission limit value, and after process, water quality can reach reuse or discharge standard.
Claims (6)
1. a cyanide wastewater synthetical recovery processing method, the step of the method is as follows:
(1), by cyanide wastewater pumping into resin absorbing column and carry out adsorption treatment, adsorbent hydroxyl aluminum is 0.5��20h;
(2), adsorb saturated after resin send in pickling post, add pickle, under 30��40 DEG C of conditions of temperature, pass into air and carry out acidifying stripping process, the gas sodium hydroxide solution of stripping absorbs, absorbing liquid to return in golden production technological process, the resin after pickling carries out Regeneration Treatment, is then fed in resin absorbing column;
(3) cyanide wastewater, after resin absorption enters ozone treating system, passes into ozone and carries out oxidation processes, and the process time is 0.25��2h;
(4) waste water, after oxidation reaction adds flocculating agent under stirring successively and flocculant carries out coagulating sedimentation, and after coagulation, waste water enters sedimentation tank and staticly settles 0.25��2h;
(5), precipitation after supernatant enter biological filter chamber treatment system, when biologic packing material, biofilm strain and air aeration, carry out a biological disposal upon;
(6) waste water after, having processed returns in the technological process of production or qualified discharge;
In described step (5), biological filter chamber treatment system is up flow type reaction tank, water-distributing device and aerator it is provided with at the bottom of pond, aerator is arranged above activated carbon, zeolite or biological potsherd filling layer, loadings accounts for the 1/5��4/5 of reactor volume, and biofilm strain, for dropping cyanogen flora, is collected near Tailings Dam in topsoil, strain biofilm mode is taked manually to add strain biofilm or Biofilmculturing, and gas liquid ratio is set as 1��15:1.
2. a kind of cyanide wastewater synthetical recovery processing method according to claim 1, it is characterised in that: in described step (1), resin is strongly basic anionic resin.
3. a kind of cyanide wastewater synthetical recovery processing method according to claim 1, it is characterized in that: in described step (2), pickle is sulphuric acid or hydrochloric acid solution, and pH value is between 2��3, and the gas-liquid-solid ratio of air, pickle and resin is 100��5000:2��10:1.
4. a kind of cyanide wastewater synthetical recovery processing method according to claim 1, it is characterized in that: in described step (3), ozone intake is determined according to the number of the cyanide in waste liquid and COD content, cyanide and COD content are high, the intake of ozone increases accordingly, otherwise, cyanide and COD content are low, and the intake of ozone reduces accordingly.
5. a kind of cyanide wastewater synthetical recovery processing method according to claim 1, it is characterized in that: in described step (4), flocculating agent is polymer-inorganic salt flocculating agent, and flocculant is that polyacrylamide, flocculating agent and flocculant are all configured to solution state and add.
6. a kind of cyanide wastewater synthetical recovery processing method according to claim 1, it is characterised in that: the described cyanogen flora that drops includes pseudomonas fluorescens, pseudomonas putida, Pseudomonas stutzeri, Nocard's bacillus and bacillus cereus.
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| CN104944695B (en) * | 2015-06-12 | 2017-06-13 | 长春黄金研究院 | Gold mine tailing storehouse accident waste water emergency processing method |
| CN106242188A (en) * | 2016-08-31 | 2016-12-21 | 南京河海环境研究院有限公司 | Effluent treatment plant |
| CN110683720B (en) * | 2019-11-21 | 2021-09-17 | 重庆化医长寿化工集团有限公司 | Method for treating sulfanilamide mother liquor |
| CN111494866B (en) * | 2020-05-10 | 2021-07-23 | 浙江澄宇环保新材料股份有限公司 | Process for screening and repairing tailing slag |
| CN114011843B (en) * | 2021-11-12 | 2023-03-28 | 长春黄金研究院有限公司 | Method for treating cyanide-containing wastewater by utilizing cyanide tailings |
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