CN107892408A - A kind of farmland agricultural chemicals waste water purification method - Google Patents

A kind of farmland agricultural chemicals waste water purification method Download PDF

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Publication number
CN107892408A
CN107892408A CN201710935760.5A CN201710935760A CN107892408A CN 107892408 A CN107892408 A CN 107892408A CN 201710935760 A CN201710935760 A CN 201710935760A CN 107892408 A CN107892408 A CN 107892408A
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added
waste water
agricultural chemicals
hours
chemicals waste
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CN201710935760.5A
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Chinese (zh)
Inventor
张春娜
俞强
李良玉
程晓梅
郭爱红
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North China University of Science and Technology
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North China University of Science and Technology
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Priority to CN201710935760.5A priority Critical patent/CN107892408A/en
Publication of CN107892408A publication Critical patent/CN107892408A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26Synthetic macromolecular compounds
    • B01J20/262Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/288Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/306Pesticides

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The invention discloses a kind of farmland agricultural chemicals waste water purification method, pentaerythrite that the present invention adds, ethyl cellulose, colloidal sol, all serve and improve adsorption effect, while Ludox also acts quickening precipitation, the effect of adsorbent temperature is improved, good concertedness is served with polyacrylamide.The purification method for effluent of the present invention will not produce secondary pollution, and processing time is short, technique is simple, high treating effect, and water outlet can reach discharging standards, and adsorbent can be separated by settlement, and stability is good, high recycling rate.

Description

A kind of farmland agricultural chemicals waste water purification method
Technical field
The invention belongs to field, and in particular to a kind of farmland agricultural chemicals waste water purification method.
Background technology
Agricultural chemicals waste water is a kind of organic chemical waste water of refractory reason, has the characteristics that COD is high, toxicity is big, difficult for biological degradation. Pesticide species are various, and agricultural chemicals waste water water quality is complicated, and it is mainly characterized by:1. pollutant concentration is higher, COD (COD) can Up to every liter of tens thousand of milligram;2. toxicity is big, in waste water in addition to containing agricultural chemicals and intermediate, also containing the noxious materials such as phenol, arsenic, mercury with And many biologies are difficult to the material degraded;3. foul smelling, irritant to the respiratory tract and mucous membrane of people;4. water quality, water are unstable It is fixed.The discharge of agricultural chemicals waste water causes extensive pollution of area source, and the duration is grown, and the agricultural chemicals of residual is very big to Health Impact;
Processing agricultural chemicals waste water adds the combined treatment process of biochemistry using materialization mostly at present, water outlet is reached local existing discharge Standard, then there is long flow path in its whole processing technology, costly, treatment effect is unstable, it is very tired to reach high standard discharge The defects of difficult.
The content of the invention
It is an object of the invention to long flow path, costly, treatment effect be present for sewage treatment process in the prior art It is unstable, reach high standard discharge it is extremely difficult the defects of the problem of, there is provided a kind of farmland agricultural chemicals waste water purification method.
To achieve the above object, the present invention uses following technical scheme:
A kind of farmland agricultural chemicals waste water purification method, comprises the following steps:
(1)Agricultural chemicals waste water is introduced into regulating reservoir, it is 2-4 to add acetic acid or soda, the pH for adjusting agricultural chemicals waste water;
(2)Copper sulphate, ferrous sulfate are added, is aerated 150-170 minutes;
(3)Adsorbent is added, is stirred, 2-3 hours is stood, upper strata waste water is flowed into new reaction tank, described suction Attached dose is made up of the raw material of following weight parts:
Tetraethyl orthosilicate 26-30, montmorillonite 60-70, acrylamide 10-12, dimethyl sulfoxide (DMSO) 100-110, carboxymethyl cellulose Sodium 1-2, pentaerythrite 3-4, ethyl cellulose 2-4, casein 0.1-0.2, ammonium persulfate 0.4-0.5;
Preparation method comprises the following steps:
Sodium carboxymethylcellulose is taken, is added in the deionized water of 70-90 times of its weight, stirs, adds tetraethyl orthosilicate, Insulated and stirred 2-3 hours, obtain sol solution at 30-35 DEG C;
Montmorillonite is taken, is added to immersion 2-3 hours in 0.4-1mol/l sodium hydroxide solution, discharging is washed, air drying, with Casein is mixed, and is added in dimethyl sulfoxide (DMSO), ultrasonic 1-2 hours, filters, and precipitation is washed, and has been dried at 60-65 DEG C of vacuum Entirely, fine powder is worn into, obtains modified montmorillonoid;
Ammonium persulfate is taken, is added in the deionized water of 20-30 times of its weight, stirs;
Acrylamide is taken, is added in above-mentioned sol solution, stirs, adds above-mentioned modified montmorillonoid, ultrasonic 10-20 divides Clock, it is sent in reactor, is passed through nitrogen, regulation temperature of reaction kettle is 65-70 DEG C, and the aqueous solution of above-mentioned ammonium persulfate is added dropwise, Rear insulation reaction 4-6 hours are added dropwise, discharging cooling, obtain polyalcohol intercalation montmorillonite sol solution;
Pentaerythrite is taken, is added in above-mentioned polyalcohol intercalation montmorillonite sol solution, stirs, distillation water removal, produces institute State adsorbent;
The substitution value of described ethyl cellulose is 1-1.3;
(4)It is 2-3 to take weight ratio:10 sodium hypochlorite, polyacrylamide mixing, are added in new reaction tank, stir, 1-2 hours are stood, solution is flowed out.
Described copper sulphate, ferrous sulfate, adsorbent, the w/v of the dosage of sodium hypochlorite and agricultural chemicals waste water are distinguished For 5-7g/l, 10-13g/l, 3-4g/l, 0.1-0.2g/l.
Advantages of the present invention:
Ferrous ion, bivalent cupric ion are incorporated into waste water by the present invention, and they are good flocculants, are had and are inhaled well Attached effect, the molecule and organic polymer of suspension or colloidal attitude in absorption effluent, while hydrate can be become Flocculent deposit, the adsorbent then added use acrylamide as monomer, with carrying out intercalation during montmorillonite blending polymerization It is modified, the silicon sol solution obtained using tetraethyl orthosilicate as presoma is introduced during intercalation modifying, it is effective to improve The adsorption effect on montmorillonite layer surface after intercalation, and the ethyl cellulose added also has good viscosity, can enter one Step improves the intercalation stability of polyacrylamide, while improves adsorption effect, and uses polyacrylamide to be used as intercalator, with gathering Acrylamide also has good flocculating effect, and flocculation adsorption body effectively can be adsorbed onto to the montmorillonite layer table of intercalation Face, improve wastewater purifying efficiency, it can be seen that pentaerythrite, ethyl cellulose, the colloidal sol that the present invention adds, all serve and carry High adsorption effect, while Ludox also acts quickening precipitation, improves the effect of adsorbent temperature, is risen with polyacrylamide Good concertedness is arrived.The purification method for effluent of the present invention will not produce secondary pollution, and processing time is short, technique is simple, place Reason effect is good, and water outlet can reach discharging standards, and adsorbent can be separated by settlement, and stability is good, repeats profit With rate height.
Embodiment
Embodiment 1
A kind of farmland agricultural chemicals waste water purification method, comprises the following steps:
(1)Agricultural chemicals waste water is introduced into regulating reservoir, adds acetic acid or soda, the pH for adjusting agricultural chemicals waste water is 4;
(2)Copper sulphate, ferrous sulfate are added, is aerated 170 minutes;
(3)Adsorbent is added, is stirred, 3 hours is stood, upper strata waste water is flowed into new reaction tank, described absorption Agent is made up of the raw material of following weight parts:
Tetraethyl orthosilicate 30, montmorillonite 70, acrylamide 12, dimethyl sulfoxide (DMSO) 110, sodium carboxymethylcellulose 2, pentaerythrite 4, Ethyl cellulose 4, casein 0.2, ammonium persulfate 0.5;
Preparation method comprises the following steps:
Sodium carboxymethylcellulose is taken, is added in the deionized water of 90 times of its weight, stirs, adds tetraethyl orthosilicate, Insulated and stirred 3 hours, obtain sol solution at 35 DEG C;
Montmorillonite is taken, is added in 1mol/l sodium hydroxide solution and soaks 3 hours, discharging washing, air drying, with casein Mixing, is added in dimethyl sulfoxide (DMSO), ultrasonic 2 hours, filtering, and precipitation is washed, dried completely at 65 DEG C of vacuum, is worn into thin Powder, obtain modified montmorillonoid;
Ammonium persulfate is taken, is added in the deionized water of 30 times of its weight, stirs;
Acrylamide is taken, is added in above-mentioned sol solution, stirs, above-mentioned modified montmorillonoid is added, ultrasound 20 minutes, send Enter into reactor, be passed through nitrogen, regulation temperature of reaction kettle is 70 DEG C, and the aqueous solution of above-mentioned ammonium persulfate is added dropwise, is added dropwise Insulation reaction 6 hours afterwards, discharging cooling, obtain polyalcohol intercalation montmorillonite sol solution;
Pentaerythrite is taken, is added in above-mentioned polyalcohol intercalation montmorillonite sol solution, stirs, distillation water removal, produces institute State adsorbent;
The substitution value of described ethyl cellulose is 1.3;
(4)It is 3 to take weight ratio:10 sodium hypochlorite, polyacrylamide mixing, are added in new reaction tank, stir, quiet Put 2 hours, solution is flowed out.
Described copper sulphate, ferrous sulfate, adsorbent, the w/v of the dosage of sodium hypochlorite and agricultural chemicals waste water are distinguished For 7g/l, 13g/l, 4g/l, 0.2g/l.
Agricultural chemicals waste water COD in farmland used in the present embodiment 1CrAverage value is 3145mg/L, turbidity 870NTU;
After method processing by the present invention, detected using method as defined in Hash standard of instruments, the waste water after processing CODCrAverage value is 44.3mg/L, clearance 98.59%, turbidity 1.4NTU, clearance 99.84%;
Embodiment 2
A kind of farmland agricultural chemicals waste water purification method, comprises the following steps:
(1)Agricultural chemicals waste water is introduced into regulating reservoir, adds acetic acid or soda, the pH for adjusting agricultural chemicals waste water is 2;
(2)Copper sulphate, ferrous sulfate are added, is aerated 150 minutes;
(3)Adsorbent is added, is stirred, 2 hours is stood, upper strata waste water is flowed into new reaction tank, described absorption Agent is made up of the raw material of following weight parts:
Tetraethyl orthosilicate 26, montmorillonite 60, acrylamide 10, dimethyl sulfoxide (DMSO) 100, sodium carboxymethylcellulose 1, pentaerythrite 3, Ethyl cellulose 2, casein 0.1, ammonium persulfate 0.4;
Preparation method comprises the following steps:
Sodium carboxymethylcellulose is taken, is added in the deionized water of 70 times of its weight, stirs, adds tetraethyl orthosilicate, Insulated and stirred 2 hours, obtain sol solution at 30 DEG C;
Montmorillonite is taken, is added in 0.4mol/l sodium hydroxide solution and soaks 2 hours, discharging washing, air drying, with cheese Element mixing, is added in dimethyl sulfoxide (DMSO), ultrasonic 1 hour, filtering, precipitation is washed, and is dried completely at 60 DEG C of vacuum, wears into thin Powder, obtain modified montmorillonoid;
Ammonium persulfate is taken, is added in the deionized water of 20 times of its weight, stirs;
Acrylamide is taken, is added in above-mentioned sol solution, stirs, above-mentioned modified montmorillonoid is added, ultrasound 10 minutes, send Enter into reactor, be passed through nitrogen, regulation temperature of reaction kettle is 65 DEG C, and the aqueous solution of above-mentioned ammonium persulfate is added dropwise, is added dropwise Insulation reaction 4 hours afterwards, discharging cooling, obtain polyalcohol intercalation montmorillonite sol solution;
Pentaerythrite is taken, is added in above-mentioned polyalcohol intercalation montmorillonite sol solution, stirs, distillation water removal, produces institute State adsorbent;
The substitution value of described ethyl cellulose is 1;
(4)It is 2 to take weight ratio:10 sodium hypochlorite, polyacrylamide mixing, are added in new reaction tank, stir, quiet Put 1 hour, solution is flowed out.
Described copper sulphate, ferrous sulfate, adsorbent, the w/v of the dosage of sodium hypochlorite and agricultural chemicals waste water are distinguished For 5g/l, 10g/l, 3g/l, 0.1g/l.
Agricultural chemicals waste water COD in farmland used in the present embodiment 1CrAverage value is 3145mg/L, turbidity 870NTU;
After method processing by the present invention, detected using method as defined in Hash standard of instruments, the waste water after processing CODCrAverage value is 40.5mg/L, clearance 98.71%, turbidity 1.0NTU, clearance 99.89%.

Claims (2)

1. a kind of farmland agricultural chemicals waste water purification method, it is characterised in that comprise the following steps:
(1)Agricultural chemicals waste water is introduced into regulating reservoir, it is 2-4 to add acetic acid or soda, the pH for adjusting agricultural chemicals waste water;
(2)Copper sulphate, ferrous sulfate are added, is aerated 150-170 minutes;
(3)Adsorbent is added, is stirred, 2-3 hours is stood, upper strata waste water is flowed into new reaction tank, described suction Attached dose is made up of the raw material of following weight parts:
Tetraethyl orthosilicate 26-30, montmorillonite 60-70, acrylamide 10-12, dimethyl sulfoxide (DMSO) 100-110, carboxymethyl cellulose Sodium 1-2, pentaerythrite 3-4, ethyl cellulose 2-4, casein 0.1-0.2, ammonium persulfate 0.4-0.5;
Preparation method comprises the following steps:
Sodium carboxymethylcellulose is taken, is added in the deionized water of 70-90 times of its weight, stirs, adds tetraethyl orthosilicate, Insulated and stirred 2-3 hours, obtain sol solution at 30-35 DEG C;
Montmorillonite is taken, is added to immersion 2-3 hours in 0.4-1mol/l sodium hydroxide solution, discharging is washed, air drying, with Casein is mixed, and is added in dimethyl sulfoxide (DMSO), ultrasonic 1-2 hours, filters, and precipitation is washed, and has been dried at 60-65 DEG C of vacuum Entirely, fine powder is worn into, obtains modified montmorillonoid;
Ammonium persulfate is taken, is added in the deionized water of 20-30 times of its weight, stirs;
Acrylamide is taken, is added in above-mentioned sol solution, stirs, adds above-mentioned modified montmorillonoid, ultrasonic 10-20 divides Clock, it is sent in reactor, is passed through nitrogen, regulation temperature of reaction kettle is 65-70 DEG C, and the aqueous solution of above-mentioned ammonium persulfate is added dropwise, Rear insulation reaction 4-6 hours are added dropwise, discharging cooling, obtain polyalcohol intercalation montmorillonite sol solution;
Pentaerythrite is taken, is added in above-mentioned polyalcohol intercalation montmorillonite sol solution, stirs, distillation water removal, produces institute State adsorbent;
The substitution value of described ethyl cellulose is 1-1.3;
(4)It is 2-3 to take weight ratio:10 sodium hypochlorite, polyacrylamide mixing, are added in new reaction tank, stir, 1-2 hours are stood, solution is flowed out.
2. a kind of farmland agricultural chemicals waste water purification method according to claim 1, it is characterised in that described copper sulphate, sulphur Sour ferrous iron, adsorbent, the w/v of the dosage of sodium hypochlorite and agricultural chemicals waste water are respectively 5-7g/l, 10-13g/l, 3-4g/ l、0.1-0.2g/l。
CN201710935760.5A 2017-10-10 2017-10-10 A kind of farmland agricultural chemicals waste water purification method Pending CN107892408A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108609753A (en) * 2018-06-27 2018-10-02 黄益良 A kind of heavy is from sedimentation sewage-treating agent and preparation method thereof
CN108862638A (en) * 2018-06-27 2018-11-23 合肥艾飞新材料有限公司 A kind of environment-protective water treatment gel and preparation method thereof
CN109095542A (en) * 2018-09-26 2018-12-28 深圳市裕农科技股份有限公司 A kind of clarifying agent and preparation method thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108609753A (en) * 2018-06-27 2018-10-02 黄益良 A kind of heavy is from sedimentation sewage-treating agent and preparation method thereof
CN108862638A (en) * 2018-06-27 2018-11-23 合肥艾飞新材料有限公司 A kind of environment-protective water treatment gel and preparation method thereof
CN108862638B (en) * 2018-06-27 2021-10-12 苏州慧连航科技有限公司 Environment-friendly water treatment gel and preparation method thereof
CN109095542A (en) * 2018-09-26 2018-12-28 深圳市裕农科技股份有限公司 A kind of clarifying agent and preparation method thereof

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Application publication date: 20180410