CN103910429A - Preparation process of biological complex breaking agent for treating electroplating wastewater containing heavy metal complex - Google Patents
Preparation process of biological complex breaking agent for treating electroplating wastewater containing heavy metal complex Download PDFInfo
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- CN103910429A CN103910429A CN201410139992.6A CN201410139992A CN103910429A CN 103910429 A CN103910429 A CN 103910429A CN 201410139992 A CN201410139992 A CN 201410139992A CN 103910429 A CN103910429 A CN 103910429A
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Abstract
The invention discloses a preparation process of a biological complex breaking agent for treating electroplating wastewater containing heavy metal complex. The preparation process comprises the following steps: (1), preparation of biological compound enzyme, wherein culture screening is carried out onto special biological enzyme; microbial laccase and lipase are taken as the principal components and other oxidation-reduction enzymes are added to prepare the biological compound enzyme under a certain condition and proportion; (2), preparation of an efficient coagulant, wherein the efficient coagulant is prepared from polymerized aluminum ferric chloride, polymeric ferric sulfate, polymerized sodium silicate and calcium chloride under a certain proportion and condition; and (3), preparation of a biological complex breaking agent, wherein the prepared biological compound enzyme and the efficient coagulant are prepared into the biological complex breaking agent under a certain condition and proportion. The biological complex breaking agent for treating electroplating wastewater containing heavy metal complex disclosed by the invention has the advantages of being high in catalytic efficiency, wide in applicability, efficient for a long time, and the like, and is suitable for being popularized and used.
Description
Technical field
The present invention relates to biological contact break agent for a kind of electroplating wastewater processing, be specifically related to the preparation technology of a kind of electroplating wastewater processing with biological contact break agent, belong to environmental technology field.
Background technology
In recent years, along with the development of electroplating industry, the developing rapidly of especially multi-point and wide-ranging small towns electroplating enterprise, the contamination area of electroplating industry constantly expands, and electroplating wastewater becomes one of representative difficult trade effluent.And the most unmanageable composition of electroplating wastewater is exactly heavy metal, be the heavy metal ion hard degradation especially of complex state in the middle of particularly.Although heavy metal in waste water treatment technology kind is a lot of at present, as chemical precipitation, chemistry redox, membrane sepn, ion-exchange etc., but for the consideration of the aspects such as economy, operability, maintainability, the Present Domestic overwhelming majority's electroplating enterprise all adopts chemical precipitation method to process electroplating wastewater, wherein processes in the majority with alkaline sedimentation again.But, along with the formal enforcement of new plating pollutant emission standard (GB21900-2008), cannot reach the emission request of new standard completely through the water outlet heavy metal of traditional chemical method processing.
In electroplating process, in order to improve the quality of coating of plating piece, as the hardness of raising coating, corrosion resistant degree, luminance brightness etc., often in plating solution, need to add a large amount of additives.The composition of these additives is along with the raising that quality of coating is required, and its kind is also more and more, and composition also becomes increasingly complex, as: tartrate, EDTA, pyrophosphate salt, Citrate trianion, lactic acid salt, ethylenediamine salt, ammonium salt etc.The effect of additive is to form various complex states with metal, thereby improves the cathodic polarization effect of coating, make that coating is more careful, porosity still less etc.Just, because these additives can form very stable complex state compound with heavy metal ion, plating piece is in the time cleaning, and the plating solution of taking out of enters in waste water, makes the contained heavy metal of waste water also be complex status, causes sewage to be difficult to process.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide that a kind of catalytic efficiency is high, suitability is wide and there is the preparation technology of biological contact break agent for the electroplating wastewater processing of permanent high efficiency.
For achieving the above object, electroplating wastewater processing of the present invention comprises following steps by the preparation technology of biological contact break agent: the 1) preparation of compound bio-enzyme: particular organisms enzyme is cultivated to screening, take microorganism laccase and lipase as main, and add other oxydo-reductase composition, under certain condition and ratio, make compound bio-enzyme; 2) preparation of coagulant: aluminium iron polychloride, bodied ferric sulfate, polymeric silicicacid sodium and calcium chloride are prepared under certain proportion and condition; 3) prepare biological contact break agent: the above-mentioned compound bio-enzyme making and coagulant are prepared into biological contact break agent under certain condition and ratio.
Principle of the present invention is: the functional enzyme such as the laccase by artificial culture and lipase and chromic salt, sulfate reduction enzyme, to electroplating wastewater produce electrostatic adsorption, enzyme catalyzed conversion effect, complexing action, throwing out, contain co-precipitation and changing of ph value kind acted on etc., organic additive or organic complex generation catalyzed oxidation are decomposed, make that these organic-matter chemical keys are elongated, distortion or distortion, organism is reduced to rapidly to small organic molecule or resolves into the simple inorganics such as carbonic acid gas, water.Like this, organic complex just cannot with waste water in heavy metal ion form complex state material, heavy metal ion is dissociated, then by chemical precipitation method, heavy metal is removed.
Compared with prior art, the present invention has following beneficial effect: 1, catalytic efficiency is high: biological enzyme generally can accelerated reaction speed 109～1010 times, and chemical catalyst only can fast reaction speed 104～105 times.So the very low biological enzyme of relative content at short notice can the very high substrate of catalysis content, can become thousands of times and accelerate the speed of biochemical reaction; And biological enzyme only can be accelerated chemical reaction velocity, can't change the trim point of chemical reaction, and itself not change before and after reaction; 2, suitability is wide: biological enzyme is of a great variety, and nearly all organism all may be by a certain bio-enzyme degradation, in a reactor, and the waste water that multiple biological enzyme can purifying treatment contains multiple succession simultaneously under identical condition; 3, permanent high efficiency: enzyme can not become a part for the end product of the biochemical reaction of its institute's catalysis as catalyzer, after a certain biochemical reaction completes, enzyme is left in generation, enzyme just can carry out identical effect to another molecule, as long as there is suitable condition, enzyme can be just to work down always, thereby guarantee permanent efficient; 4, the feature of environmental protection: biological enzyme is environmentally friendly preparation, can be by complete biodegradable, thus avoid using in a large number chemicals to cause secondary pollution to environment, and biological enzyme is safe from harm to environment, therefore biological enzyme can complete same work more economically, and environmental sound.
Embodiment
Embodiment mono-: the preparation of biological contact break agent for electroplating wastewater processing
1, prepare compound bio-enzyme: particular organisms enzyme is cultivated to screening, take microorganism laccase and lipase as main and other oxydo-reductase compositions, under certain condition and ratio, make compound bio-enzyme, this prozyme is by effects such as enzyme catalysiss, organism in electroplating wastewater is destroyed, heavy metal is dissociated out, each main ingredient characteristic is as follows: 1) laccase is mainly the phenol structure unit of attacking xylogen, it is one-electron oxidation reductase enzyme, except energy oxidative lignin, being also proved to be can the multiple substrate of catalysis.It is mainly take carboxylic acid and derivative, phenol, polyamino and derivative thereof, organometallics and biochrome etc. as substrate, and this type of substrate of catalysis is shown to efficient specificity; 2) microbial lipase has the wider pH scope of application, catalysis preferably, is oxidized all kinds of lipid acid and contains carboxyl type organic.
And organic constituent and laccase, the lipase-catalyzed substrate of the various additives such as the complexing agent containing in electroplating wastewater, buffer reagent and stablizer have same or similar structure, this point prove the prozyme of the formations such as microorganism laccase and lipase can catalyzed oxidation electroplating wastewater in organic forming a team in difficult degradation complex compound.
Processing in electroplating wastewater, the compound bio-enzyme of development can catalyzed oxidation destroys the organic active machine group of complex compound, and the heavy metal in complex compound is dissociated, and forms free heavy metal ion, removes thereby be easy to follow-up chemical coagulation and precipitation.
2, prepare the coagulant in biological contact break agent: coagulant of the present invention is by aluminium iron polychloride, bodied ferric sulfate, polymeric silicicacid sodium and calcium chloride, under certain proportion and condition, be prepared from, coagulant adds macromolecule, increase the polymerization degree of product, strengthen the ability of coagulation, the above-mentioned heavy metal that dissociates can be carried out to precipitation process, coagulation mechanism is: 1) provide gegenion to reach compression double electric layer thickness and reduce the effect of current potential; 2) dissolving the various ions and the microparticle surfaces that produce there is exclusive chemical action and reaches charge neutralization; 3) the throw out performance volume being generated by hydrolyzing metallic salts class is beaten to flutter to act on and is made particulate proceed to precipitation.
3, prepare biological contact break agent: the above-mentioned compound bio-enzyme making and coagulant, under certain condition and ratio, are made to the biological contact break agent for the processing of electroplating wastewater difficult degradation heavy metal.
Embodiment bis-: biological contact break agent is applied to the test of difficult degradation electroplating wastewater
Chemical nickel-plating plating solution formula is made up of main salt, reductive agent, complexing agent, buffer reagent, stablizer, accelerator and other additive, and in these compositions, complexing agent generally contains hydroxyl, carboxyl and amino active factor; Buffer reagent generally contains all kinds of lipid acid such as some citric acids, acetic acid; Stablizer mainly comprises iodo acetic acid, Acetanilide and derivative thereof; Conventional accelerator is also some carboxyl organism; Other additive is conventional tensio-active agent etc.Treatment scheme is as follows: 1, get chemical nickle-plating wastewater 1000ml in beaker, add sulphuric acid soln and adjust pH value to 2.0(acidifying), stir 30min; 2, in waste water, add FeSO4 solution again, stir 30min; 3, after stirring reaction, in waste water, add NaOH solution, adjust pH value to 7.0.Then in waste water, drop into 2ml chemical nickel plating special bio contact break agent, stir 30min; 4, in waste water, drop into lime solution again, regulate pH value to 12.0.Now waste water generates a large amount of tiny mud granules, then adds polyacrylamide solution, and tiny mud granule flocculates into rapidly large mud granule; 5, leave standstill, large mud granule natural subsidence, supernatant liquid takes out, and adding sulphuric acid soln to be neutralized to pH value is 6～9, can reach emission level.
Test equally by above step, add chemical nickel plating special bio contact break agent but save in step 3, carry out contrast experiment with this, result is as follows:
| Water sample title | Total nickel | Total phosphorus | Ammonia nitrogen | COD Cr | PH value |
| The former water of chemical nickle-plating wastewater | 129.12 | 390.11 | 78.98 | 890.12 | 8.98 |
| Do not add biological contact break agent processing | 12.09 | 212.12 | 66.43 | 561.11 | 7.23 |
| Add biological contact break agent processing | 0.1201 | 0.8911 | 12.11 | 68.12 | 7.09 |
| GB21900-2008 standard | ≤0.5 | ≤1.0 | ≤15 | ≤80 | 6～9 |
Can illustrate by above experimental data, the invention solves organic complex in electroplating wastewater and be difficult to the problem of removing, realized organic complex removal, complexation heavy metal ion is dissociated, heavy metal is well degraded, and water outlet can be stablized the GB21900-2008 standard that reaches.
Claims (1)
1. the preparation technology with biological contact break agent containing heavy metal complex electroplating wastewater processing, is characterized in that, comprises following steps:
1) preparation of compound bio-enzyme: particular organisms enzyme is cultivated to screening, take microorganism laccase and lipase as main, and add other oxydo-reductase composition, make compound bio-enzyme under certain condition and ratio;
2) preparation of coagulant: aluminium iron polychloride, bodied ferric sulfate, polymeric silicicacid sodium and calcium chloride are prepared under certain proportion and condition;
3) prepare biological contact break agent: the above-mentioned compound bio-enzyme making and coagulant are prepared into biological contact break agent under certain condition and ratio.
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Cited By (9)
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| CN104478168A (en) * | 2014-12-13 | 2015-04-01 | 山东永泰化工有限公司 | Treatment process for wastewater generated during recycling process of waste tire |
| CN104478096A (en) * | 2014-12-13 | 2015-04-01 | 山东永泰化工有限公司 | Water purifying agent for wastewater treatment in rubber accelerator production and wastewater treatment method |
| CN104529052A (en) * | 2014-11-26 | 2015-04-22 | 山东永泰化工有限公司 | Tire production enterprise wastewater treatment method |
| CN104556289A (en) * | 2014-10-24 | 2015-04-29 | 无锡伊佩克科技有限公司 | Wastewater purifying agent and preparation method thereof |
| CN107840545A (en) * | 2017-11-30 | 2018-03-27 | 重庆精创联合环保工程有限公司 | Process for treating industrial waste water |
| CN107930605A (en) * | 2017-11-30 | 2018-04-20 | 重庆精创联合环保工程有限公司 | Adsorbent for electroplating wastewater adsorption treatment |
| CN108949186A (en) * | 2018-07-12 | 2018-12-07 | 袁阔 | A kind of soil conditioner improving crop yield and quality |
| CN114315011A (en) * | 2021-12-01 | 2022-04-12 | 江苏同瑞环保有限公司 | Coking wastewater treatment system and coking wastewater treatment method |
| CN117757482A (en) * | 2023-12-18 | 2024-03-26 | 浙江省地质院 | Preparation method of cadmium-polluted repair passivating agent |
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Cited By (13)
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| CN104556289A (en) * | 2014-10-24 | 2015-04-29 | 无锡伊佩克科技有限公司 | Wastewater purifying agent and preparation method thereof |
| CN104529052B (en) * | 2014-11-26 | 2016-02-10 | 山东永泰化工有限公司 | Tyre production enterprise method of wastewater treatment |
| CN104529052A (en) * | 2014-11-26 | 2015-04-22 | 山东永泰化工有限公司 | Tire production enterprise wastewater treatment method |
| CN104478096B (en) * | 2014-12-13 | 2016-08-24 | 山东永泰化工有限公司 | Rubber accelerant wastewater process water purification agent and method of wastewater treatment |
| CN104478096A (en) * | 2014-12-13 | 2015-04-01 | 山东永泰化工有限公司 | Water purifying agent for wastewater treatment in rubber accelerator production and wastewater treatment method |
| CN104478168B (en) * | 2014-12-13 | 2016-03-02 | 山东永泰化工有限公司 | Junked tire reclaims waste water treatment process |
| CN104478168A (en) * | 2014-12-13 | 2015-04-01 | 山东永泰化工有限公司 | Treatment process for wastewater generated during recycling process of waste tire |
| CN107840545A (en) * | 2017-11-30 | 2018-03-27 | 重庆精创联合环保工程有限公司 | Process for treating industrial waste water |
| CN107930605A (en) * | 2017-11-30 | 2018-04-20 | 重庆精创联合环保工程有限公司 | Adsorbent for electroplating wastewater adsorption treatment |
| CN107930605B (en) * | 2017-11-30 | 2021-05-04 | 重庆精创联合环保工程有限公司 | Adsorbent for adsorption treatment of electroplating wastewater |
| CN108949186A (en) * | 2018-07-12 | 2018-12-07 | 袁阔 | A kind of soil conditioner improving crop yield and quality |
| CN114315011A (en) * | 2021-12-01 | 2022-04-12 | 江苏同瑞环保有限公司 | Coking wastewater treatment system and coking wastewater treatment method |
| CN117757482A (en) * | 2023-12-18 | 2024-03-26 | 浙江省地质院 | Preparation method of cadmium-polluted repair passivating agent |
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