CN102718353A - System of and method for advanced treatment of refractory industrial wastewater - Google Patents

System of and method for advanced treatment of refractory industrial wastewater Download PDF

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Publication number
CN102718353A
CN102718353A CN2011100777331A CN201110077733A CN102718353A CN 102718353 A CN102718353 A CN 102718353A CN 2011100777331 A CN2011100777331 A CN 2011100777331A CN 201110077733 A CN201110077733 A CN 201110077733A CN 102718353 A CN102718353 A CN 102718353A
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pond
waste water
treatment
water
catalyzed oxidation
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CN102718353B (en
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汪诚文
付宏祥
赵雪锋
陆茵
贾捍卫
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Beijing Guohuan Tsinghua Environmental Engineering Desegn & Research Institute Co ltd
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Beijing Guohuan Tsinghua Environmental Engineering Desegn & Research Institute Co ltd
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Abstract

The invention discloses a system of and a method for advanced treatment of refractory industrial wastewater, wherein the system comprises a pH regulating tank, a catalytic oxidation tank, a flocculation deposit tank, an intermediate water tank and a biological aeration filter, and the process comprises collecting industrial wastewater into the pH regulating tank, adding H2SO4 into the pH regulating tank to regulate the pH value of the wastewater to 3.5-4.5, then putting the wastewater into the catalytic oxidation tank, adding H2O2 and FeSO4 into the catalytic oxidation tank for catalytic oxidation, then adding NaOH or Na2CO3 to the flocculation deposit tank, regulating the pH value to 8.5-9.0, and leading the wastewater treated through the abovementioned steps into the intermediate water tank and the biological aeration filter in turn to further remove CODCr. The system and method are characterized by simple process flow, easy operation and management, relatively low operation cost and excellent treatment effect.

Description

Indegradable industrial effluent advanced treatment system and method
Technical field
The invention belongs to the advanced treatment of industrial waste water technical field, be specifically related to a kind of indegradable industrial effluent advanced treatment system and method, can be used as advanced treatment, be connected in after the existing Waste Water Treatment water outlet, further remove COD in the waste water Cr, index such as hardness, basicity, water outlet can be satisfied reuse or as the desalination pre-treatment
Background technology
In recent years, along with the frequent generation of all kinds of water pollution incidents, the raising of sewage drainage standard is had higher requirement to enterprise, how can better utilize sewage resource, reduces sewage emissions, realizes that recycle becomes important task of enterprise.
Reuse is the important channel of realizing that water-saving and emission-reducing, control water pollute after the advanced treatment of industrial waste water.Trade effluent water quality is with the heterogeneity more complicated of the production technique and the mode of production.Most of trade effluent matter water yields change greatly, and saltiness is high, and part contains hazardous and noxious substances, reuse after being difficult to direct reuse or adopting conventional processing.
The technology that is adopted in the current industrial wastewater treatment mainly contains advanced oxidation processes, r-o-, conventional biological treatment etc., has obtained certain effect, but has also had certain problem.Most of trade effluents are through after the second-stage treatment, and biochemical is relatively poor, handle like direct employing biological process, and treatment effect is relatively poor, COD CrDo not reach the standard of reuse etc. the clearance of index of correlation; Like direct employing chemical method, then processing cost is higher, and economic benefit is relatively poor.
Along with the fast development of reverse osmosis technology, in the application in Industrial Wastewater Treatment field more and more widely, it is also more outstanding to its influence to give birth to fouling and chemical fouling.Give birth to fouling and chemical fouling and make the reverse osmosis desalination rate descend and the producing water ratio reduction, shortened the cycle of operation greatly, become the critical limitation factor of r-o-utilization.To the water quality characteristic of trade effluent,, research and develop suitable advanced treatment of industrial waste water system and have important society and economic benefit in conjunction with the problem that existing treatment technology exists.
Summary of the invention
The objective of the invention is characteristics and difficulty in treatment, a kind of indegradable industrial effluent advanced treatment system and method are provided to indegradable industrial effluent.The native system technical process is simple, the easy handling management, and working cost is lower, and treatment effect is good.Waste water COD after the processing CrClearance reaches more than 60%, and the hardness clearance reaches more than 65%, as a kind of pretreatment process of desalination, can effectively alleviate the dirty stifled and chemical scale formation of mikrobe that organism and hardness etc. are brought, and solves the difficult problem in the r-o-operational process.
In order to reach above-mentioned purpose of design, the technical scheme that the present invention adopts is following:
A kind of indegradable industrial effluent advanced treatment system; Mainly comprise pH regulator pond, catalyzed oxidation pond, flocculation sedimentation tank, intermediate pool and BAF; Said pH regulator pond is used to regulate wastewater pH to mild catalytic oxidation pH scope, and water outlet is connected to the catalyzed oxidation pond; The catalyzed oxidation pond is used to accomplish the mild catalytic oxidizing reaction, improves the biodegradability of waste water, tentatively removes COD Cr, dosing mouth being set in the pond being used to add catalyzer and oxygenant, the outlet of catalyzed oxidation pond is connected to flocculation sedimentation tank; Said flocculation sedimentation tank comprises reaction zone and settling region, and the reaction zone inlet is connected dosing mouth in the pond with the catalyzed oxidation pond; Be used to add alkali and flocculation agent, water outlet gets into post precipitation district, settling region set inside swash plate by the bottom; The bottom is provided with mud discharging mouth, and water outlet is connected to intermediate pool; The built-in sewage pump of intermediate pool, lifting sewage to follow-up BAF, BAF is used to accomplish biochemical reaction, further removes COD CrAdopt water inlet upper water-out mode down, the haydite of choosing particle diameter and be 3~6mm is as aerating biological filter pool filler, and set inside is used for the water distributor and the gas distribution pipe of back flushing; BAF is provided with water port, backwash water inlet and backwash water port, and the backwash draining is connected to flocculation sedimentation tank.
A kind of deep treatment method of indegradable industrial effluent adopts the mode of catalyzed oxidation and biological treatment, but makes processed waste water direct reuse or as the pre-treatment of desalting treatment; Concrete steps are: collect the trade effluent secondary treatment yielding water to the pH regulator pond, in the pH regulator pond, add H 2SO 4Regulate waste water ph to 3.5~4.5, leave standstill 0.5h; Afterwards the waste water of pH value to 3.5 is sent into the catalyzed oxidation pond, in the waste water that regulates the pH value, add H in the catalyzed oxidation pond simultaneously 2O 2And FeSO 4, to carry out catalyzed oxidation, the catalyzed oxidation time is 2h; The waste water of accomplishing oxidation is carried out flocculation precipitation reaction 30min at flocculation sedimentation tank, add NaOH or Na to flocculation sedimentation tank then 2CO 3, regulate pH value to 8.5~9.0 depositions, 2.0~2.5h, utilize iron ion in the solution as flocculation agent, add SEPIGEL 305 simultaneously as coagulant aids, iron ion, hardness in the removal waste water; Get into intermediate pool through the waste water after the above-mentioned processing, leave standstill 1h, get into BAF at last, further remove COD Cr
Said COD CrBe Chemical Oxygen Demand, be the meaning of chemical oxygen demand, also claim to be called for short " COD " " oxygen-consumption ".With the amount of oxygen that is consumed during aerobic pollution matter in chemical oxidizing agent (like potassium permanganate, the SRM 935a) oxidizing water, often represent with symbol COD.Measure unit is mg/L.It is one of important overall target of evaluation water pollution degree.In environment (synonym in the presents) system refer to difficult degradation in the waste water pollutent its reflected the degree that polluted by reducing substances, this index is also as one of overall target of organism relative content in the waste water.
The beneficial effect of indegradable industrial effluent advanced treatment system of the present invention and method is: to the treatment process and the main design and operation parameter of indegradable industrial effluent advanced treatment and reuse; Adopt this treatment process; Can effectively remove hardness and basicity in the waste water; Through the appropriate oxidation in early stage, guarantee the effect of biochemical treatment, handle back water outlet COD CrLess than 20mg/L.But waste water direct reuse or as the pre-treatment of desalination system after treatment.
Description of drawings
Fig. 1 is the process flow sheet of described indegradable industrial effluent advanced treatment system of the embodiment of the invention and method.
Embodiment
Be noted that following detailed description all is an exemplary, being intended to provides further explanation to the present invention.Unless otherwise, all technology used of this paper and scientific terminology have with the present invention under the identical meanings of those of ordinary skill common sense of technical field.
As shown in Figure 1; The described indegradable industrial effluent advanced treatment system of the embodiment of the invention; Mainly comprise pH regulator pond, catalyzed oxidation pond, flocculation sedimentation tank, intermediate pool and BAF; Said pH regulator pond is used to regulate wastewater pH to mild catalytic oxidation pH scope, and water outlet is connected to the catalyzed oxidation pond; The catalyzed oxidation pond is used to accomplish the mild catalytic oxidizing reaction, improves the biodegradability of waste water, tentatively removes COD Cr, dosing mouth being set in the pond being used to add catalyzer and oxygenant, the outlet of catalyzed oxidation pond is connected to flocculation sedimentation tank; Said flocculation sedimentation tank comprises reaction zone and settling region, and the reaction zone inlet is connected dosing mouth in the pond with the catalyzed oxidation pond; Be used to add alkali and flocculation agent, water outlet gets into post precipitation district, settling region set inside swash plate by the bottom; The bottom is provided with mud discharging mouth, and water outlet is connected to intermediate pool; The built-in sewage pump of intermediate pool, lifting sewage to follow-up BAF, BAF is used to accomplish biochemical reaction, further removes COD CrAdopt water inlet upper water-out mode down, the haydite of choosing particle diameter and be 3~6mm is as aerating biological filter pool filler, and set inside is used for the water distributor and the gas distribution pipe of back flushing; BAF is provided with water port, backwash water inlet and backwash water port, and the backwash draining is connected to flocculation sedimentation tank.
The described indegradable industrial effluent advanced treatment system of the embodiment of the invention; Also comprise sludge thickener; Be used for the mud that flocculation sedimentation tank produces is carried out concentration, said sludge thickener is connected with said flocculation sedimentation tank mud discharging mouth, and sludge thickener is connected to sludge dewatering system.
Saidly in pH regulator pond, catalyzed oxidation pond and flocculation sedimentation tank, whipping appts is set, is used for the mixing of reaction process medicament in waste water.
Said pH regulator is provided with aeration tube in the pond, is used for gas stirring, makes the waste water thorough mixing and removes basicity in the waste water.
Said pH regulator is provided with the pH monitor in the pond, is used to measure the pH value of liquid, with the dosage of control medicament.
The deep treatment method of the described indegradable industrial effluent of the embodiment of the invention is the mode that adopts catalyzed oxidation and biological treatment, but makes processed waste water direct reuse or as the pre-treatment of desalting treatment.
Its concrete steps are: collect the trade effluent secondary treatment yielding water to the pH regulator pond, in the pH regulator pond, add H 2SO 4Regulate waste water ph to 3.5~4.5, leave standstill 0.5h; Afterwards the waste water of pH value to 3.5 is sent into the catalyzed oxidation pond, in the waste water that regulates the pH value, add H in the catalyzed oxidation pond simultaneously 2O 2And FeSO 4, to carry out catalyzed oxidation, the catalyzed oxidation time is 2h; The waste water of accomplishing oxidation is carried out flocculation precipitation reaction 30min at flocculation sedimentation tank, add NaOH or Na to flocculation sedimentation tank then 2CO 3, regulate pH value to 8.5~9.0 depositions, 2.0~2.5h, utilize iron ion in the solution as flocculation agent, add SEPIGEL 305 simultaneously as coagulant aids, iron ion, hardness in the removal waste water; Get into intermediate pool through the waste water after the above-mentioned processing, leave standstill 1h, get into BAF at last, further remove COD Cr
Said oxygenant H 2O 2Concentration be 30%, H 2O 2Dosage and waste water COD CrMass concentration ratio is 1.4: 1, catalyst Fe SO 4Dosage and waste water COD CrThe ratio of mass concentration is 0.41: 1.
Said SEPIGEL 305 dosage: 5mg/L.
The void tower flow velocity of said BAF is 2.5~3.5m/h, and hydraulic detention time is controlled at 40~60min, and GWR is 1: 1, and backwashing period is 5d.
Embodiment 1
In a tame citric acid production producer, collect the terminal water outlet of its production wastewater treatment system, it to be tested, the pH value is 7.5, COD CrBe 90mg/L, hardness is 1000mg/L.
Utilize volume pump to add H 2SO 4Solution is adjusted to 3.5 with the terminal treat effluent pH of factory effluent value, and pH regulator is provided with stirrer in the pond, and the pH appearance shows and control adds the acid amount, and the pH regulator pond residence time is 30min.
Waste water utilizes volume pump to add H from flowing into the mild catalytic oxidation pond at reaction zone after regulating pH 2O 2(concentration is 30%) and FeSO 4, be provided with stirrer, reaction times 120min.The reaction back utilizes volume pump to add NaOH from flowing into the flocculation sediment district, and the pH value is adjusted to 8.5, and be beneficial to volume pump afterwards and add coagulant aids SEPIGEL 305 5mg/L, reaction precipitation 2.0h, the reaction back is from flowing into intermediate pool, hydraulic detention time 1h.
Waste water is promoted to BAF through lift pump, hydraulic detention time 40min in the intermediate pool.
Biochemistry pool water outlet priority pollutant index is as shown in table 1.
Table 1 is handled the principal pollutant index of back water outlet
Can know that by data in the table 1 waste water of discharging through waste water treatment process of the present invention has effectively reduced organism and hardness, can be used as the pre-treatment of desalination system, guarantee its operation steady in a long-term.
In this actual case history, this system is provided with the PLC system, is used for according to liquid level control lift pump start and stop in the pond, according to the start and stop of pH value control dosing volume pump, also regulating being used for the unitary fan operation of biochemical treatment time and air quantity.
Embodiment 2
In a tame citric acid production producer, collect the terminal water outlet of its production wastewater treatment system, it to be tested, the pH value is 8.5, COD CrBe 120mg/L, hardness is 1200mg/L.
Utilize volume pump to add H 2SO 4Solution is adjusted to 4.5 with the terminal treat effluent pH of factory effluent value, and pH regulator is provided with stirrer in the pond, and the pH appearance shows and control adds the acid amount, and the pH regulator pond residence time is 30min.
Waste water utilizes volume pump to add H from flowing into the mild catalytic oxidation pond at reaction zone after regulating pH 2O 2(concentration is 30%) and FeSO 4, be provided with stirrer, reaction times 120min.The reaction back utilizes volume pump to add Na from flowing into the flocculation sediment district 2CO 3, the pH value is adjusted to 9.0, be beneficial to volume pump afterwards and add coagulant aids SEPIGEL 305 5mg/L, reaction precipitation 2.5h,, the reaction back is from flowing into intermediate pool, hydraulic detention time 1h.
Waste water is promoted to BAF through lift pump, hydraulic detention time 60min in the intermediate pool.
Biochemistry pool water outlet priority pollutant index is as shown in table 1.
Table 2 is handled the principal pollutant index of back water outlet
Can know that by data in the table 2 waste water of discharging through waste water treatment process of the present invention has effectively reduced organism and hardness, can be used as the pre-treatment of desalination system, guarantee its operation steady in a long-term.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. indegradable industrial effluent advanced treatment system; It is characterized in that: mainly comprise pH regulator pond, catalyzed oxidation pond, flocculation sedimentation tank, intermediate pool and BAF; Said pH regulator pond is used to regulate wastewater pH to mild catalytic oxidation pH scope, and water outlet is connected to the catalyzed oxidation pond; The catalyzed oxidation pond is used to accomplish the mild catalytic oxidizing reaction, improves the biodegradability of waste water, tentatively removes COD Cr, dosing mouth being set in the pond being used to add catalyzer and oxygenant, the outlet of catalyzed oxidation pond is connected to flocculation sedimentation tank; Said flocculation sedimentation tank comprises reaction zone and settling region, and the reaction zone inlet is connected dosing mouth in the pond with the catalyzed oxidation pond; Be used to add alkali and flocculation agent, water outlet gets into post precipitation district, settling region set inside swash plate by the bottom; The bottom is provided with mud discharging mouth, and water outlet is connected to intermediate pool; The built-in sewage pump of intermediate pool, lifting sewage to follow-up BAF, BAF is used to accomplish biochemical reaction, further removes COD CrAdopt water inlet upper water-out mode down, the haydite of choosing particle diameter and be 3~6mm is as aerating biological filter pool filler, and set inside is used for the water distributor and the gas distribution pipe of back flushing; BAF is provided with water port, backwash water inlet and backwash water port, and the backwash draining is connected to flocculation sedimentation tank.
2. indegradable industrial effluent advanced treatment system according to claim 1; It is characterized in that: described indegradable industrial effluent advanced treatment system; Also comprise sludge thickener; Be used for the mud that flocculation sedimentation tank produces is carried out concentration, said sludge thickener is connected with said flocculation sedimentation tank mud discharging mouth, and sludge thickener is connected to sludge dewatering system.
3. indegradable industrial effluent advanced treatment system according to claim 1 and 2 is characterized in that: saidly in pH regulator pond, catalyzed oxidation pond and flocculation sedimentation tank, whipping appts is set, is used for the mixing of reaction process medicament in waste water.
4. indegradable industrial effluent advanced treatment system according to claim 3 is characterized in that: said pH regulator is provided with aeration tube in the pond, is used for gas stirring, makes the waste water thorough mixing and removes basicity in the waste water.
5. indegradable industrial effluent advanced treatment system according to claim 1 and 2 is characterized in that: said pH regulator is provided with the pH monitor in the pond, is used to measure the pH value of liquid, with the dosage of control medicament.
6. the deep treatment method of an indegradable industrial effluent is characterized in that: adopt the mode of catalyzed oxidation and biological treatment, but make processed waste water direct reuse or as the pre-treatment of desalting treatment; Concrete steps are: collect the trade effluent secondary treatment yielding water to the pH regulator pond, in the pH regulator pond, add H 2SO 4Regulate waste water ph to 3.5~4.5, leave standstill 0.5h; Afterwards the waste water of pH value to 3.5 is sent into the catalyzed oxidation pond, in the waste water that regulates the pH value, add H in the catalyzed oxidation pond simultaneously 2O 2And FeSO 4, to carry out catalyzed oxidation, the catalyzed oxidation time is 2h; The waste water of accomplishing oxidation is carried out flocculation precipitation reaction 30min at flocculation sedimentation tank, add NaOH or Na to flocculation sedimentation tank then 2CO 3, regulate pH value to 8.5~9.0 depositions, 2.0~2.5h, utilize iron ion in the solution as flocculation agent, add SEPIGEL 305 simultaneously as coagulant aids, iron ion, hardness in the removal waste water; Get into intermediate pool through the waste water after the above-mentioned processing, leave standstill 1h, get into BAF at last, further remove COD Cr
7. indegradable industrial effluent deep treatment method according to claim 6 is characterized in that: said oxygenant H 2O 2Concentration be 30%, H 2O 2Dosage and waste water COD CrMass concentration ratio is 1.4: 1, catalyst Fe SO 4Dosage and waste water COD CrThe ratio of mass concentration is 0.41: 1.
8. indegradable industrial effluent deep treatment method according to claim 6 is characterized in that: said SEPIGEL 305 dosage: 5mg/L.
9. indegradable industrial effluent deep treatment method according to claim 6 is characterized in that: the void tower flow velocity of said BAF is 2.5~3.5m/h, and hydraulic detention time is controlled at 40~60min, and GWR is 1: 1, and backwashing period is 5d.
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN103058318A (en) * 2013-01-29 2013-04-24 上海电力学院 Method for speeding up photo degradation of critic acid boiler cleaning waste water in power plant by utilizing hydrogen peroxide
CN103979735A (en) * 2014-05-21 2014-08-13 青岛中通臭氧科技有限公司 Process and device for treating refractory industrial wastewater
CN103992009A (en) * 2014-05-26 2014-08-20 南京工业大学 PBOB treatment process for toxic organic chemical wastewater
CN106045124A (en) * 2016-07-15 2016-10-26 华东理工大学 Method for removing residual organic matters from outlet water of biological reaction system
CN109534606A (en) * 2018-12-21 2019-03-29 上海同济建设科技股份有限公司 A kind of fermented pharmaceutical waste water treatment process
CN110668638A (en) * 2019-09-24 2020-01-10 鲁西化工集团股份有限公司 System and method for deep treatment of wastewater containing high-concentration organic amine
CN111410376A (en) * 2020-04-26 2020-07-14 工大环境股份有限公司 Catalytic hydrolysis pretreatment method for industrial park wastewater

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CN101767914A (en) * 2010-01-12 2010-07-07 广西博世科环保科技有限公司 Method for treating garbage leachate

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103058318A (en) * 2013-01-29 2013-04-24 上海电力学院 Method for speeding up photo degradation of critic acid boiler cleaning waste water in power plant by utilizing hydrogen peroxide
CN103979735A (en) * 2014-05-21 2014-08-13 青岛中通臭氧科技有限公司 Process and device for treating refractory industrial wastewater
CN103992009A (en) * 2014-05-26 2014-08-20 南京工业大学 PBOB treatment process for toxic organic chemical wastewater
CN106045124A (en) * 2016-07-15 2016-10-26 华东理工大学 Method for removing residual organic matters from outlet water of biological reaction system
CN109534606A (en) * 2018-12-21 2019-03-29 上海同济建设科技股份有限公司 A kind of fermented pharmaceutical waste water treatment process
CN110668638A (en) * 2019-09-24 2020-01-10 鲁西化工集团股份有限公司 System and method for deep treatment of wastewater containing high-concentration organic amine
CN111410376A (en) * 2020-04-26 2020-07-14 工大环境股份有限公司 Catalytic hydrolysis pretreatment method for industrial park wastewater

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