CN103991916A - Comprehensive electroplating wastewater treating agent - Google Patents
Comprehensive electroplating wastewater treating agent Download PDFInfo
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- CN103991916A CN103991916A CN201410259818.5A CN201410259818A CN103991916A CN 103991916 A CN103991916 A CN 103991916A CN 201410259818 A CN201410259818 A CN 201410259818A CN 103991916 A CN103991916 A CN 103991916A
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Abstract
The invention relates to a comprehensive electroplating wastewater treating agent. The comprehensive electroplating wastewater treating agent is composed of the following components in percentage by mass: 10-35% of reducing agent, 20-50% of sulfide, 10-30% of aluminum salt, 10-30% of adsorbing material and 5-15% of alkaline substances. The raw materials of the treating agent provided by the invention are low in cost and easy to obtain, and the treating agent is easy to prepare; through compounding the raw materials, a synergistic effect is exerted, and the treating agent is favorable in broad spectrum, capable of effectively removing heavy metals such as nickel, chromium, copper, zinc and the like, high in removal rate up to more than 96% and relatively good in COD (Chemical Oxygen Demand) removal effect; the comprehensive electroplating wastewater treating agent also has the characteristics of strong electroplating wastewater treating capacity, high heavy metal ion sedimentation speed and efficiency, no secondary pollution after treatment and the like; in addition, the treating agent provided by the invention is convenient to use, simple and feasible in treating process, capable of realizing operation by only using a vessel or pool with an aerating agitation device, reducing the floor area and reducing the investment, and easy to realize operation management.
Description
Technical field
The invention belongs to field of Environment Protection, relate to a kind of waste water conditioner, relate to specifically a kind of integrative electroplating waste treatment agent.
Background technology
Integrative electroplating waste is the various waste water of discharging at plating production process.Integrative electroplating waste is generally containing chromium plating wastewater, nickel-plating waste water, copper plating wastewater, zinc-plated waste water, acidic and alkaline waste water etc., its pollutant load is high and composition is diversified, the pollution causing is roughly: the pollution of chemical toxicant, the pollution of organic aerobic material, the pollution of inoganic solids suspended substance and acid, alkali, heat etc., the pollution such as coloured, foam, oils.
Integrative electroplating waste complicated component, treatment technology is also varied, currently used treatment process mainly contains chemical method, physico-chemical process and biological process etc.
Chemical method adds chemical reagent exactly, by chemical reaction, makes pollutent in electroplating wastewater become innoxious substance or be easy to the material separated with water, then the treatment process of further removing from electroplating wastewater.Chemical method mainly comprises: chemical precipitation method, chemical oxidization method, chemical reduction method, neutralisation etc.The advantages such as less investment, treatment unit are simple, processing cost is lower although this method has, installation and maintenance and processing ease, exist that processing efficiency is low, effluent quality is poor, can not recycle and produce the shortcomings such as sludge quantity is large.
Physico-chemical process mainly comprises: ion exchange method, membrane separation process, evaporation concentration method, absorption method etc.Ion exchange method have convenient management, cost of investment low, easily be automated, separation efficiency is high, advanced treatment is effective, water outlet can reuse etc. advantage, chromium plating, nickel plating and plating precious metal have been widely used in as in gold and silver wastewater treatment, but high owing to existing processing cost, regenerated liquid is difficult to the problems such as recycling, and effect is also not obvious.Membrane separation technique is mainly micro-filtration, ultrafiltration and reverse osmosis etc.But adopt membrane separation technique to exist cost of investment higher, membrane element easily damages and causes membrane flux to decline rapidly, regeneration, replacing diaphragm complicated operation, inconvenience is grasped, the shortcomings such as the permanent stability deficiency of system.Evaporation concentration method is a good method for traditional flucculation process, because it does not need to add medicament, tasteless, without gas, also without Toxic, discharges.Evaporation concentration method can not only reduce waste liquid volume, and distilled water can be recycled, and concentrated solution can be replied to use or go and be burned.But exist, power consumption is large, process cost is high, and the problems such as impurities removal, are difficult to promote the use of.Absorption method is to utilize the method for the physical structure heavy-metal ion removal of sorbent material.Gac is one of modal sorbent material of processing electroplated heavy metals waste water.Gac equipment is simple, but regeneration of activated carbon is difficult, and poor processing effect, and after processing, water quality is difficult to reuse.
The mechanism of biological process processing electroplating wastewater is the relation of alternate, symbiosis, in microbial growth, reproductive process, can produce a certain amount of meta-bolites, and this class biological mass-energy changes the heavy metal ion valence state in waste water.Microorganism species itself also has stronger biofloculation, electrostatic adsorption simultaneously, and adsorbing metal ions, makes it after solid-liquid separation, enter bacterium mud cake, discharged wastewater met the national standard or reuse.Microbial method has the advantages such as efficiency is high, selectivity is strong, loading capacity is large, but have at present that reaction efficiency is not high, substratum consumption is large, processing cost is high, the remnants biology in water outlet can also continue breeding, can not direct reuse etc. shortcoming.
In the treatment process of existing electroplating wastewater processing, there is complex process in chemical method, physico-chemical process etc., energy consumption is large, cost is high, running expense is high, produce the shortcomings such as secondary pollution; And though biological process has the advantages such as comprehensive treatment capability is strong, process control is simple, sludge quantity is few, from use angle, also have that function yeast reaction efficiency is low, reproduction speed is slow, process shipwreck in reuse, can not guarantee the shortcomings such as wastewater treatment stably moves.
Summary of the invention
The deficiency existing in order to overcome prior art, the invention provides the integrative electroplating waste treatment agent that a kind of processing cost is low, easy to use, treatment effect is good.
An integrative electroplating waste treatment agent, described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: reductive agent 10～35%, sulfide 20～50%, aluminium salt 10～30%, sorbing material 10～30%, alkaline matter 5～15%.
In integrative electroplating waste, contain various heavy pollutent, the reductive agent in component of the present invention can be used for reductive action, by hexavalent chrome reduction, is trivalent chromium; Sulfide can be used for reduction and chemical precipitation; Aluminium salt can be used for flocculation and chemical precipitation; Alkaline matter can be used for regulating pH, provides OH-to make heavy metal sedimentation; Adsorption when sorbing material can be used for carrying out advanced treatment.Feed composition of the present invention has not only been given play to advantage function separately, and by mutual synergy, has reached and both effectively removed the heavy metals such as nickel, chromium, copper, zinc, and effectively removes the object of COD.In order effectively to bring into play the synergy between feed composition, five kinds of feed composition of the present invention are indispensable.Treatment process of the present invention is simple, only medicament (integrative electroplating waste treatment agent) need to be thrown in a container with aeration stirrer or pond and can remove heavy metal ion, and do not increase equipment and technique, greatly reduce the cost of processing integrative electroplating waste.
As preferably, described reductive agent is a kind of in S-WAT, Sodium Nitrite, Sodium Pyrosulfite, ferrous sulfate, oxalic acid.
As preferably, described sulfide is a kind of in sodium sulphite, sulfurated lime, ammonium sulfide.
As preferably, described aluminium salt is a kind of in polyaluminium sulfate, polymerize aluminum chloride, Tai-Ace S 150, aluminum chloride, aluminum oxide.
As preferably, described sorbing material is a kind of in gac, wilkinite, diatomite, kaolin, flyash, sepiolite.
As preferably, described alkaline matter is a kind of in sodium hydroxide, calcium hydroxide, potassium hydroxide.
As preferably, described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: S-WAT 25%, sodium sulphite 35%, Tai-Ace S 150 20%, diatomite 10%, calcium hydroxide 10%.
As preferably, described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: Sodium Pyrosulfite 20%, sulfurated lime 20%, polyaluminium sulfate 30%, gac 15%, calcium hydroxide 15%.
As preferably, described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: ferrous sulfate 12%, sulfurated lime 40%, polymerize aluminum chloride 15%, wilkinite 25%, sodium hydroxide 8%.
Treatment agent raw materials cost of the present invention is cheap, be easy to get, and easily makes; Composite by raw material, performance synergy, has broad spectrum, can effectively remove the heavy metals such as nickel, chromium, copper, zinc, and clearance reaches more than 96%, and COD is removed and also has good effect; The present invention also has that to process the ability of integrative electroplating waste strong, to processing, the settling velocity of heavy metal ion is fast, efficiency is high, process after the feature such as non-secondary pollution; In addition, treatment agent of the present invention is easy to use, and treatment process is simple, only need to have container or a pond with aeration stirrer just can operate, and has reduced floor space, reduces investment outlay, and is easy to operational management.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention is not limited to this.
Embodiment 1
An integrative electroplating waste treatment agent, by accounting for treatment agent total mass per-cent, is comprised of 25% S-WAT, 35% sodium sulphite, 20% Tai-Ace S 150,10% diatomite, 10% calcium hydroxide.
Above-mentioned integrative electroplating waste treatment agent is applied to Lishui Treatment of Industrial Park of Plating zone electroplating waste water.The electroplating comprehensive waste water 1L of Qu Gai factory is in beaker, and the former water index of this electroplating comprehensive waste water is respectively pH 5.6, COD 291.2mg/L, Ni
2+127.26mg/L, Cu
2+85.4mg/L, Cr
6+64.1mg/L, Zn
2+12.6mg/L, adds this compound for treatment of electroplating wastes of 5.0g, with 120rpm, stirs 10～30min, and standing 30min gets supernatant liquid filtering and measures indices.Treatment agent effect later indices measurement result is respectively pH 8.5, COD 51.3mg/L, Ni
2+1.21mg/L, Cu
2+0.48mg/L, Cr
6+0.19mg/L, Zn
2+0.39mg/L, clearance is respectively COD 82.4%, Ni
2+99.0%, Cu
2+99.4%, Cr
6+99.7%, Zn
2+96.9%.
By accounting for treatment agent total mass per-cent, the compound for treatment of electroplating wastes being formed by 28% S-WAT, 39% sodium sulphite, 22% Tai-Ace S 150,11% diatomite as a control group 1.
By accounting for treatment agent total mass per-cent, the compound for treatment of electroplating wastes being formed by 39% S-WAT, 31% Tai-Ace S 150,15% diatomite, 15% calcium hydroxide as a control group 2.
By accounting for treatment agent total mass per-cent, the compound for treatment of electroplating wastes being formed by 28% S-WAT, 39% sodium sulphite, 22% Tai-Ace S 150,11% calcium hydroxide as a control group 3.
Control group 1,2,3 is applied to respectively to above-mentioned electroplating wastewater (Lishui Treatment of Industrial Park of Plating zone electroplating waste water), and the clearance of control group 1 is respectively COD 48.0%, Ni
2+66.4%, Cu
2+75.4%, Cr
6+76.7%, Zn
2+63.5%; The clearance of control group 2 is respectively COD 53.2%, Ni
2+69.8%, Cu
2+79.2%, Cr
6+80.9%, Zn
2+71.0%; The clearance of control group 3 is respectively COD 57.1%, Ni
2+80.8%, Cu
2+82.8%, Cr
6+83.0%, Zn
2+80.3%.Can find out, between each component that the present invention adopts, by synergy, can remove the many kinds of metal ions in water body, the clearance of metal ion is reached more than 96%, and COD is removed and also has good effect; And five kinds of components are indispensable, lacking wherein any treatment effect can obvious variation.
Embodiment 2
An integrative electroplating waste treatment agent, by accounting for treatment agent total mass per-cent, is comprised of 20% Sodium Pyrosulfite, 20% sulfurated lime, 30% polyaluminium sulfate, 15% gac, 15% calcium hydroxide.
Above-mentioned integrative electroplating waste treatment agent is applied to the electroplating wastewater of Linan City, Zhejiang Province Electroplate Factory.The electroplating comprehensive waste water 1L of Qu Gai factory is in beaker, and the former water index of this electroplating comprehensive waste water is respectively pH 4.3, COD 386.9mg/L, Ni
2+210.3mg/L, Cu
2+24.6mg/L, Cr
6+184.3mg/L, Zn
2+82.6mg/L, adds this compound for treatment of electroplating wastes of 5.0g, with 120rpm, stirs 10～30min, and standing 30min gets supernatant liquid filtering and measures indices.Treatment agent effect later indices measurement result is respectively pH 8.3, COD 94.2mg/L, Ni
2+5.6mg/L, Cu
2+0.39mg/L, Cr
6+1.7mg/L, Zn
2+0.94mg/L, clearance is respectively COD 75.7%, Ni
2+97.3%, Cu
2+98.4%, Cr
6+99.1%, Zn
2+98.9%.
Embodiment 3
An integrative electroplating waste treatment agent, by accounting for treatment agent total mass per-cent, is comprised of 12% ferrous sulfate, 40% sulfurated lime, 15% polymerize aluminum chloride, 25% wilkinite, 8% sodium hydroxide.
Above-mentioned integrative electroplating waste treatment agent is applied to the electroplating wastewater of Zhejiang Province Haining City Electroplate Factory.The electroplating comprehensive waste water 1L of Qu Gai factory is in beaker, and the former water index of this electroplating comprehensive waste water is respectively pH 6.3, COD 562.4mg/L, Ni
2+113.6mg/L, Cu
2+148.5mg/L, Cr
6+25.6mg/L, Zn
2+56.5mg/L, adds this compound for treatment of electroplating wastes of 5.0g, with 120rpm, stirs 10～30min, and standing 30min gets supernatant liquid filtering and measures indices.Treatment agent effect later indices measurement result is respectively pH 8.3, COD 106.7mg/L, Ni
2+2.4mg/L, Cu
2+4.0mg/L, Cr
6+0.20mg/L, Zn
2+0.83mg/L, clearance is respectively COD 81.0%, Ni
2+97.9%, Cu
2+97.3%, Cr
6+99.2%, Zn
2+98.5%.
Embodiment 4
An integrative electroplating waste treatment agent, described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: oxalic acid 33%, ammonium sulfide 27%, aluminum oxide 10%, flyash 25%, potassium hydroxide 5%.
Above-mentioned integrative electroplating waste treatment agent is applied to the electroplating wastewater of Zhejiang Province Haining City Electroplate Factory.The electroplating comprehensive waste water 1L of Qu Gai factory is in beaker, and the former water index of this electroplating comprehensive waste water is respectively pH 6.3, COD 562.4mg/L, Ni
2+113.6mg/L, Cu
2+148.5mg/L, Cr
6+25.6mg/L, Zn
2+56.5mg/L, adds this compound for treatment of electroplating wastes of 5.0g, with 120rpm, stirs 10～30min, and standing 30min gets supernatant liquid filtering and measures indices.Treatment agent effect later indices measurement result is respectively pH 8.2, COD 99.5mg/L, Ni
2+1.8mg/L, Cu
2+2.5mg/L, Cr
6+0.18mg/L, Zn
2+0.73mg/L, clearance is respectively COD 82.3%, Ni
2+98.4%, Cu
2+98.3%, Cr
6+99.3%, Zn
2+98.7%.
The present invention is applicable to process integrative electroplating waste (containing the electroplating wastewater of various heavy), can not only effectively remove the heavy metals such as nickel, chromium, copper, zinc, and COD is removed and also has good effect; Treatment process of the present invention is simple, as long as delivering medicament can be removed heavy metal ion, and does not increase equipment and technique, greatly reduces the cost of processing electroplating wastewater.The present invention has that processing cost is low, easy to use, heavy metal and the feature such as COD removal effect is good, treatment effect is stable.
Claims (9)
1. an integrative electroplating waste treatment agent, is characterized in that: described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: reductive agent 10～35%, sulfide 20～50%, aluminium salt 10～30%, sorbing material 10～30%, alkaline matter 5～15%.
2. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described reductive agent is a kind of in S-WAT, Sodium Nitrite, Sodium Pyrosulfite, ferrous sulfate, oxalic acid.
3. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described sulfide is a kind of in sodium sulphite, sulfurated lime, ammonium sulfide.
4. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described aluminium salt is a kind of in polyaluminium sulfate, polymerize aluminum chloride, Tai-Ace S 150, aluminum chloride, aluminum oxide.
5. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described sorbing material is a kind of in gac, wilkinite, diatomite, kaolin, flyash, sepiolite.
6. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described alkaline matter is a kind of in sodium hydroxide, calcium hydroxide, potassium hydroxide.
7. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: S-WAT 25%, sodium sulphite 35%, Tai-Ace S 150 20%, diatomite 10%, calcium hydroxide 10%.
8. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: Sodium Pyrosulfite 20%, sulfurated lime 20%, polyaluminium sulfate 30%, gac 15%, calcium hydroxide 15%.
9. integrative electroplating waste treatment agent according to claim 1, is characterized in that: described integrative electroplating waste treatment agent is comprised of the component of following quality percentage composition: ferrous sulfate 12%, sulfurated lime 40%, polymerize aluminum chloride 15%, wilkinite 25%, sodium hydroxide 8%.
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Application publication date: 20140820 |