CN104671378A - Special coagulation accelerating/conducting compound salt for treating electrical catalytic wastewater - Google Patents
Special coagulation accelerating/conducting compound salt for treating electrical catalytic wastewater Download PDFInfo
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- CN104671378A CN104671378A CN201510075669.1A CN201510075669A CN104671378A CN 104671378 A CN104671378 A CN 104671378A CN 201510075669 A CN201510075669 A CN 201510075669A CN 104671378 A CN104671378 A CN 104671378A
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- wastewater
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a special coagulation accelerating/conducting compound salt for treating electrical catalytic wastewater. The special coagulation accelerating/conducting compound salt is prepared from sodium chloride, a macromolecular compound polymeric ferric salt, anionic polyacrylamide, chitin and sodium carbonate. In the electrochemical or electrical catalytic treatment process of wastewater such as urban household wastewater, printing and dyeing wastewater, medical wastewater and oilfield wastewater, the coagulation accelerating/conducting compound salt is added, so that the conductivity of the wastewater and the flocculation rate of various polluting components can be increased simultaneously, the electrical catalytic wastewater treatment efficiency is improved, the energy consumption in the electrochemical or electrical catalytic treatment process is greatly reduced, and the coagulation accelerating/conducting compound salt is low in cost of raw materials and convenient to use, and can be widely popularized and used.
Description
Technical field
The invention discloses special the urging of a kind of electrocatalysis wastewater treatment and coagulate/conduction composite salt, belong to technical field of sewage.
Background technology
Flocculation technique is generally used for both at home and abroad increasing water quality a kind of not only economy but also easy water conditioning method of processing efficiency, and it is widely used in the process of process water, trade effluent and sanitary sewage.In the choice and application of flocculation agent, the overwhelming majority is placed on inorganic flocculating agent and the general polymeric flocculant of synthesis, and little to the investigation and application of composite flocculation agent.In form, the polymerization degree and corresponding cohesion-flocculating effect, inorganic polymer flocculant is still in the position between conventional metals salt coagulant and organic floculant.Its molecular weight and globule size and flocculation bridge formation ability still far short of what is expected than organic floculant, but also there is the instability problem to further hydrolysis reaction.In addition the dosage of inorganic flocculating agent is large, produces sludge quantity many, and process is complicated; General organic polymer coargulator expensive, building-up process is complicated.Thus seek the novel flocculant that a kind of price is low, treatment effect is good and just seem more and more important.
At present, electrochemical method is as a kind of environmental friendliness new technology, and be more and more subject to people's attention in environmental pollution improvement particularly in waste water in bio-refractory organic matter removal, electrochemistry has played immeasurable effect.Electrochemical water treatment technology can high-level efficiency twelve Earthly Branches except being difficult to biochemical degradation, to human health risk greatly " three cause " (carcinogenic, teratogenesis, mutagenesis) organic pollutant, but when waste water poorly conductive, electrode easily polarizes and reduces electrocatalysis waste water treatment efficiency, reduces the flocculation efficiency of electrode pair waste water simultaneously; Particularly in process heavy metal polluted waste water, deposit certain consumption of electrode excessive, the pressure that the whole Wastewater by Electric catalytic treatment cost brought improves.Therefore providing electroconductibility to electrocatalysis process waste water simultaneously and increase induction of flocculation ability is the extremely urgent technical barrier needing to solve of prior art.
Summary of the invention
For the defect existed in electrocatalysis process waste water technology of the prior art, the object of the invention is to be to provide special the urging of a kind of electroconductibility that simultaneously can improve waste water in electrocatalysis or electrochemical treatment of wastewater process and the flocculation rate improving various pollutant component to coagulate/conduction composite salt.
The invention provides special the urging of a kind of electrocatalysis wastewater treatment and coagulate/conduction composite salt, this is urged solidifying/composite salt of conducting electricity and is made up of following content of component: 45 ~ 65 parts, sodium-chlor; 1 ~ 5 part, polymer composite polymeric molysite; Anionic polyacrylamide 5 ~ 10 parts; Chitin 1 ~ 5 part; 30 ~ 40 parts, sodium carbonate.
Preferred polymer composite polymeric molysite main component is bodied ferric sulfate, and full weight of iron mark is >=9%.
Preferred anionic polyacrylamide molecular weight is 6,000,000 ~ 2,500 ten thousand.
Polymer composite polymeric molysite, anionic polyacrylamide and the chitin urging to adopt in solidifying/conduction composite salt of the present invention is all conventional commercially available prod.Anionic polyacrylamide Contents of Main Components >=95%, chitin has another name called chitosan or chitin, Contents of Main Components >=85%.The sodium-chlor adopted and sodium carbonate are all technical grade product.
Of the present invention short solidifying/conduction composite salt adds before waste water enters electrochemistry (or electrocatalysis) treatment system, the ratio of interpolation, according to the difference of the wastewater property of process, can be added in the proportional range of 3 ~ 12g/t waste water.
The electrocatalysis process that composite salt is applicable to the low electric conductivity waste water such as urban domestic wastewater, dyeing waste water, medical waste water, oil field waste is coagulated/conducted electricity to of the present invention urging.
Inorganic macromolecular composite polymeric ferric salt polymer materials and organic anionic polyacrylamide and chitin are carried out composite use by the present invention, its synergy throwing out obviously strengthens, use in conjunction with strong electrolyte inorganic salt sodium-chlor and sodium carbonate again, polymer composite polymeric molysite on the one hand, anionic polyacrylamide and the various flocculation compositions that chitin is composite and hydrolysis produces, can effectively improve electrochemistry throwing out, to SS removal ability in the waste water under electric field action, there is promoter action, on the other hand for urban domestic wastewater, printing and dyeing, the conductivity of the waste water of the poorly conductive of the contour ammonia nitrogen of pharmacy obviously increases, effective raising electrochemistry or electrocatalysis efficiency.
Hinge structure, beneficial effect of the present invention: 1, add flocculation of the present invention/conduction composite salt in electrocatalysis or electrochemical treatment of wastewater process and effectively can improve the electroconductibility of waste water and the flocculation rate to various pollutant component, greatly reduce the energy consumption in electrocatalysis or electrochemical treatment of wastewater process and export license, improve waste water treatment efficiency; 2, low, the safety and environmental protection of flocculation of the present invention/conduction composite salt raw materials cost, easy to use, be applicable to various different electrochemical treatment technique and device, also be applicable to electrocatalysis or the electrochemical treatment process of the various waste water such as urban domestic wastewater, dyeing waste water, medical waste water, oil field waste, be suitable for promoting the use of.
Embodiment
Following examples are intended to further illustrate content of the present invention, instead of limit the scope of the invention.
Embodiment 1
Urge solidifying/conduction composite salt formula: 65 parts, sodium-chlor; 2 parts, polymer composite polymeric molysite; Anionic polyacrylamide (molecular weight 8,000,000) 5 parts; Chitin 1 part; 40 parts, sodium carbonate.
Formula is applied to certain Conventional electrochemical treatment unit process urban domestic wastewater, wherein, in urban domestic wastewater, BOD is 300mg/L ~ 400mg/L, TSS is 200mg/L ~ 400mg/L.Water inlet pipe place before waste water enters electrochemical treatment system arranges automatic medicament and adds pump, empirically determine that ratio 5.8g/t adds in Conventional electrochemical sewage treatment equipment, electrochemical treatment is carried out under the Electrolytic conditions urging solidifying/conduction composite salt, Process for Effluent mouth BOD is <40mg/L, TSS is <20mg/L, and in waste water, BOD clearance can reach more than 90%.Its overall current efficiency reaches 57% simultaneously, does not relatively add when urging to coagulate/conduct electricity composite salt and improves 15%.
Embodiment 2
Urge solidifying/conduction composite salt formula: 46 parts, sodium-chlor; 5 parts, polymer composite polymeric molysite; Anionic polyacrylamide (molecular weight 1,500 ten thousand) 8 parts; Chitin 2 parts; 32 parts, sodium carbonate.
Formula is applied to certain waste water treatment plant's electrochemical treatment high-COD waste water (wherein COD content is up to 4750mg/L), water inlet pipe place before waste water enters electrochemical treatment system arranges automatic medicament and adds pump, and short interpolation pump adding proportion of coagulating/conducting electricity composite salt is 6.5g/t.After using, relatively do not add short solidifying/conduction composite salt time, bring up to 95.6% to COD clearance by 66%, the COD of water outlet is that 209mg/L, COD power consumption is less than 55kwh/kg.
Comparative example 1
Urge solidifying/conduction composite salt formula: 15 parts, sodium-chlor; 5 parts, polymer composite polymeric molysite; Anionic polyacrylamide (molecular weight 1,500 ten thousand) 8 parts; Chitin 2 parts; 15 parts, sodium carbonate.
Be applied to certain waste water treatment plant's high-COD waste water electrochemical treatment of embodiment 2, the water inlet pipe place before waste water enters electrochemical treatment system arranges automatic medicament and adds pump, and urging solidifying/conduction composite salt interpolation pump adding proportion is 15g/t.After using, the COD of water outlet is 1330mg/L, and contrast former COD value (4750mg/L), clearance only has 72%.COD power consumption reaches 75kwh/kg.This COD processing efficiency reaches " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) when influent COD is greater than 350mg/L, and clearance should be greater than the requirement of 60%; But its energy consumption raises, and reagent cost also improves.
Embodiment 3
Certain type electro-catalytic wastewater treating equipment uses the power consumption contrast of flocculation/conduction composite salt:
Flocculation/conduction composite salt formula: 65 parts, sodium-chlor; 1 part, polymer composite polymeric molysite; Anionic polyacrylamide (molecular weight 1,000 ten thousand) 5 parts; Chitin 1 part; 39 parts, sodium carbonate.
This formula is used to carry out 600 tons of sanitary sewage disposals.Water inlet pipe place before sanitary wastewater enters electrochemical treatment system arranges automatic medicament and adds pump, and the adding proportion of flocculation/conduction composite salt is 6.0g/t, average current drain 3.8kW/t; Former average current drain is about 4kW/t, final cost is added up, water per ton saves 0.12 yuan than not adding this composite salt, saves 0.23 yuan (removed the cost of flocculation/conduction composite salt than Conventional electrochemical waste water treatment process (average current drain is about 4.4kW/t); Electricity price is by 0.58 yuan/kW).Sewage disposal index sees the following form 1:
Table 1 enters mouth of a river sewage index value contrast table (mg/L)
| Sewage index | BOD | TSS | Phosphorus | Oil stain |
| Water-in | 242.5 | 960 | 132 | 48 |
| Water outlet | 26.5 | 19.5 | 7 | 1 |
| Clearance | 89％ | 98％ | 95％ | 98％ |
Embodiment 4
(5) solidifying/conduction composite salt formula is urged: 65 parts, sodium-chlor; 5 parts, polymer composite polymeric molysite; Anionic polyacrylamide (molecular weight 1,000 ten thousand) 8 parts; Chitin 025 parts (using three kinds of proportionings); 30 parts, sodium carbonate.
Be applied to certain domestic pollution treatment plant electrochemical treatment technique, the water inlet pipe place before waste water enters electrochemical treatment system arranges automatic medicament and adds pump, and urging solidifying/conduction composite salt interpolation pump adding proportion is 6.5g/t.Different number chitin adds in formula, and the index of sewage disposal sees the following form:
Table 2 sewage disposal index
| Chitin proportioning (part) sewage index | Turbidity (NTU) | COD(mg/L) |
| Former water | 53.6 | 376 |
| 0 | 4.2 | 287 |
| 2 | 3.6 | 172 |
| 5 | 3.5 | 158 |
Can see from upper table 2, in formula, other composition uses mark constant, the turbidity value abatement of use to wastewater electrochemical treatment of chitin has obvious effect, but its increment uses the consumption brought, and changing value is very little in this instance.
Claims (3)
1. electrocatalysis wastewater treatment is special urgees solidifying/conduction composite salt, it is characterized in that, is made up of following content of component:
45 ~ 65 parts, sodium-chlor;
1 ~ 5 part, polymer composite polymeric molysite;
Anionic polyacrylamide 5 ~ 10 parts;
Chitin 1 ~ 5 part;
30 ~ 40 parts, sodium carbonate.
2. electrocatalysis wastewater treatment according to claim 1 is special urgees solidifying/conduction composite salt, and it is characterized in that, described polymer composite polymeric molysite main component is bodied ferric sulfate.
3. electrocatalysis wastewater treatment according to claim 1 is special urgees solidifying/conduction composite salt, and it is characterized in that, described anionic polyacrylamide molecular weight is 6,000,000 ~ 2,500 ten thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510075669.1A CN104671378B (en) | 2015-02-12 | 2015-02-12 | A kind of electro-catalysis waste water processes special coagulant/conduction complex salt |
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| CN201510075669.1A CN104671378B (en) | 2015-02-12 | 2015-02-12 | A kind of electro-catalysis waste water processes special coagulant/conduction complex salt |
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| CN104671378A true CN104671378A (en) | 2015-06-03 |
| CN104671378B CN104671378B (en) | 2016-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927606A (en) * | 2015-12-31 | 2017-07-07 | 中国石油化工股份有限公司 | A kind of processing method of alkaline residue sulfide in sewage |
Citations (4)
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|---|---|---|---|---|
| JPS52126064A (en) * | 1976-04-15 | 1977-10-22 | Sekisui Chem Co Ltd | Process for treating waste water of regenerated paper production |
| CN102515328A (en) * | 2011-12-29 | 2012-06-27 | 上海久安水质稳定剂厂 | Papermaking sewage treatment flocculant and preparation method thereof |
| CN103043835A (en) * | 2012-09-07 | 2013-04-17 | 赵立地 | Livestock breeding waste disposal method |
| CN104071880A (en) * | 2014-06-27 | 2014-10-01 | 南昌格润环保科技有限公司 | Extensive wastewater treatment capture agent |
-
2015
- 2015-02-12 CN CN201510075669.1A patent/CN104671378B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52126064A (en) * | 1976-04-15 | 1977-10-22 | Sekisui Chem Co Ltd | Process for treating waste water of regenerated paper production |
| CN102515328A (en) * | 2011-12-29 | 2012-06-27 | 上海久安水质稳定剂厂 | Papermaking sewage treatment flocculant and preparation method thereof |
| CN103043835A (en) * | 2012-09-07 | 2013-04-17 | 赵立地 | Livestock breeding waste disposal method |
| CN104071880A (en) * | 2014-06-27 | 2014-10-01 | 南昌格润环保科技有限公司 | Extensive wastewater treatment capture agent |
Non-Patent Citations (1)
| Title |
|---|
| 宋卫军: "染料废水的电化学脱色研究", 《河北化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927606A (en) * | 2015-12-31 | 2017-07-07 | 中国石油化工股份有限公司 | A kind of processing method of alkaline residue sulfide in sewage |
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Address after: 410100 Xingsha Road, Changsha Economic Development Zone, Hunan, No. 15 Patentee after: Aerospace Kay environmental Polytron Technologies Inc Address before: 410100 Xingsha Road, Changsha Economic Development Zone, Hunan, No. 15 Patentee before: Kaitian Environmental Tech. Co., Ltd. |
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Effective date of registration: 20190828 Address after: 410100 Xingsha Avenue, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Co-patentee after: Hunan spaceflight kaytian water Co., Ltd. Patentee after: Aerospace Kay environmental Polytron Technologies Inc Address before: 410100 Xingsha Road, Changsha Economic Development Zone, Hunan, No. 15 Patentee before: Aerospace Kay environmental Polytron Technologies Inc |