CN103723779A - Fenton reaction system capable of controlling medicament feeding - Google Patents

Fenton reaction system capable of controlling medicament feeding Download PDF

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Publication number
CN103723779A
CN103723779A CN201210392753.2A CN201210392753A CN103723779A CN 103723779 A CN103723779 A CN 103723779A CN 201210392753 A CN201210392753 A CN 201210392753A CN 103723779 A CN103723779 A CN 103723779A
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China
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water
cod
reverse osmosis
fenton
reaction
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CN201210392753.2A
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田陆梅
黄圣散
杨瑜芳
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Toray Advanced Materials Research Laboratories China Co Ltd
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Toray Advanced Materials Research Laboratories China Co Ltd
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Abstract

The invention belongs to the field of sewage treatment, and relates to a Fenton reaction system for treating reverse osmosis concentrated water produced by reuse of urban sewage. An on-line COD (chemical oxygen demand) monitor is arranged at a water inlet of the Fenton reaction system; when the COD of RO (reverse osmosis) concentrated water subjected to denitrification treatment is less than or equal to 60mg/L, medicament feeding is designed to ferric chloride feeding; when the COD of the RO concentrated water subjected to denitrification treatment is larger than 60mg/L, the medicament feeding is designed to ferric chloride and hydrogen peroxide feeding, and pH adjustment is executed until the pH is adjusted to 3-5. According to the Fenton reaction system, the problem of ultrahigh medicament feeding cost in process of treating reverse osmosis concentrated water produced during the reuse of the urban sewage is solved; the Fenton reaction system is simple and convenient to operate and easy to implement; treated water can meet the first-grade standard B of the Pollutant Discharging Standard of the Urban Sewage Treatment Plant, so that the concentration of pollutants discharged into the environment is reduced.

Description

A kind of Fenton's reaction system of controlled adding of agent processed
Technical field
The invention belongs to sewage treatment area, be specifically related to a kind of Fenton's reaction system of controlled adding of agent processed of processing of reverse osmosis concentrated shrink of urban sewage recycling generation.
Background technology
The national Freshwater resources anxiety of China, the city of lack of water has accounted for 60%.On the other hand, wastewater discharge increases day by day, and the shortage of Freshwater resources and the increase of wastewater discharge have badly influenced economic sustainable development and the raising of living standards of the people, and developing new water resources becomes the task of top priority.Trade effluent and municipal sewage treatment, reuse are that waste water reclaiming is the main contents of setting up new water resources.
According to the < < urban sewage reutilization technical policy > > of Ministry of Construction's issue, the direct utilization ratio of reuse water in water shortage in north china city in 2015 reaches the 20%-25% of urban wastewater discharge, and southern coastal lack of water city reaches 10%-15%.Membrane technique is widely used in waste water recycling is processed as a kind of novel isolation technique and has shown vast potential for future development.In recent years, diversified film combination process is more and more paid close attention to, and the film integrated system that different types of film is combined can be brought into play the advantage of various membrane techniquies, forms the novel process of waste water advanced processing.Trade effluent, municipal effluent etc. can reuse be industrial water purification (recirculated water, process water or water coolant etc.) again after by biochemical treatment after embrane method advanced treatment, have improved the utilization ratio of water resources.Reverse osmosis (RO) technology become the membrane process that must use in waste water advanced processing it
In these combination reuse technologies, the generation of reverse osmosis concentrated shrink is the problem that cannot avoid, and this is due to the really organic pollutant in degrading waste water of reverse osmosis technology, just the organic pollutant in original waste water is shifted and is concentrated.The reverse osmosis concentrated shrink that urban sewage recycling produces is except the feature that saltiness is high, biodegradability is poor that has general reverse osmosis concentrated shrink and all have, and the content of its nitrogen phosphorus is higher is also the difficult point of a processing.
Patent (CN 201110367083.4) has been mentioned the treatment process of the reverse osmosis concentrated shrink of a kind of urban sewage recycling, and Fenton system applies, in the processing of reverse osmosis concentrated shrink, is reached to the effect of removing COD and total phosphorus simultaneously.But the chemicals dosing plant of Fenton system is not carried out to refinement, according to the COD concentration in former water, judge the kind that adds medicament.So just cause the waste of part adding of agent, increased the cost of chemicals treatment.
Therefore, a kind of method that processing cost is lower, be easy to the reverse osmosis concentrated shrink of Treating Municipal Sewage reuse of control, better effects if is provided, make it process water outlet and reach < < urban wastewater treatment firm pollutant emission standard > > one-level B standard, for the popularization that adopts embrane method reuse municipal effluent technique, have great importance.
Summary of the invention
The technical problem to be solved in the present invention is: the reverse osmosis concentrated shrink poor for the biodegradability producing in urban sewage recycling process, nitrogen and phosphorus content is high, provide a kind of processing cost lower, be easy to control, new Fenton's reaction system that treatment effect is good.
Object of the present invention can reach by following measures:
A Fenton's reaction system for controlled adding of agent processed, Fenton's reaction system water-in is arranged on line chemical oxygen demand COD monitor, and when reverse osmosis concentrated water chemical oxygen demand COD≤60mg/L after denitrogenation processing, adding of agent is set to iron(ic) chloride and adds; As the reverse osmosis concentrated water chemical oxygen demand COD >60mg/L after denitrogenation processing, adding of agent is set to iron(ic) chloride and hydrogen peroxide adds, and carry out pH regulator, and adjustment pH is 3-5.
Increase COD(chemical oxygen demand (COD)) after monitor, can confirm according to the COD concentration of Fenton's reaction system water inlet the kind of the medicament that will add, when the dense water COD≤60mg/L of RO, be that COD has reached < < urban wastewater treatment firm pollutant emission standard > > one-level B standard, just do not need to carry out adding of hydrogen peroxide, so just save the adding of agent expense of hydrogen peroxide, reduced the cost of wastewater treatment.
During reverse osmosis concentrated water chemical oxygen demand COD >60mg/L after denitrogenation processing, the mass ratio of the reverse osmosis concentrated water chemical oxygen demand COD after dosage and the denitrogenation processing of hydrogen peroxide is 1:1-3:1; The dosage of hydrogen peroxide has larger impact to the removal effect of COD in pending water, the dosage of hydrogen peroxide is too low, may be more limited to the removal effect of COD, dosage is too high, hydrogen peroxide itself also can consume the hydroxyl radical free radical of the strong oxidizing property of generation, increase processing cost, reduce the feasibility that it applies in Practical Project.
The dosage of hydrogen peroxide and the Fe of iron(ic) chloride 3+mol ratio be 5:1-10:1; Fe 3+in Fenton's reaction, play catalyzer, too low Fe 3+dosage may affect its catalytic effect, and can not guarantee the removal effect of total phosphorus in water.Too high Fe 3+dosage can increase unnecessary adding of agent cost.
During reverse osmosis concentrated water chemical oxygen demand COD≤60mg/L after denitrogenation processing, in the dosage of iron(ic) chloride and reverse osmosis concentrated water, the mass ratio of total phosphorus is 5:1-8:1, can reach < < urban wastewater treatment firm pollutant emission standard > > one-level B standard so that obtain the concentration of total phosphorus in water outlet.
The invention solves the problem that the reverse osmosis concentration water treatment procedure Chinese medicine producing in urban sewage recycling process adds high cost, at Fenton's reaction system water-in, online COD (chemical oxygen demand (COD)) monitor is set, according to the concentration of influent COD, judge the kind of the medicament that will add, reduce the expense of unnecessary adding of agent, reduced the cost of reverse osmosis concentration water treatment.The present invention is simple to operation, easy to implement, process water outlet and can reach < < urban wastewater treatment firm pollutant emission standard > > one-level B standard, reduced the Pollutant levels that are discharged in environment.
Accompanying drawing explanation
Fig. 1 adopts Fenton's reaction system diagram of the present invention.
Embodiment
The mensuration of COD (chemical oxygen demand (COD)) in embodiment adopts standard potassium dichromate method (State Standard of the People's Republic of China GB 11914-89), and the mensuration of total phosphorus adopts ammonium molybdate spectrophotometry (State Standard of the People's Republic of China GB 11893-89).Water quality data is wherein the mean value (test in every two weeks 1 time, the mean value of half a year) obtaining in test.
The chemical substance of using in embodiment is bought in Chemical Reagent Co., Ltd., Sinopharm Group.
Embodiment 1
As Fig. 1, the reverse osmosis concentrated shrink that adopts Fenton's reaction system Treating Municipal Sewage reuse of the present invention to produce, the processing water yield is 50m 3/ d, Fenton's reaction system water-in arranges online COD (chemical oxygen demand (COD)) monitor, when the dense water COD≤60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride and adds, and in the dense water of the dosage of iron(ic) chloride and RO, the mass ratio of total phosphorus is 6:1.As the dense water COD>60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride, hydrogen peroxide adds, and carry out pH regulator, and adjusting pH is 4.Wherein in the dosage of hydrogen peroxide and pending water, the mass ratio of COD is 2:1, the dosage of hydrogen peroxide and Fe 3+mol ratio be 8:1, process water outlet can reach < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level B standard.Inlet and outlet water water quality is as shown in table 1.0.80 yuan/m of Fenton's reaction system RO condensed water processing cost 3.
Table 1 is tested Inlet and outlet water water quality
Project COD(mg/L) TP(mg/L)
Water inlet 50-80 6.5-10
Water outlet 54 0.7
Embodiment 2
As Fig. 1, the reverse osmosis concentrated shrink that adopts Fenton's reaction system Treating Municipal Sewage reuse of the present invention to produce, the processing water yield is 60m 3/ d, Fenton's reaction system water-in arranges online COD (chemical oxygen demand (COD)) monitor, when the dense water COD≤60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride and adds, and in the dense water of the dosage of iron(ic) chloride and RO, the mass ratio of total phosphorus is 5:1.As the dense water COD>60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride, hydrogen peroxide adds, and carry out pH regulator, and adjusting pH is 4.Wherein in the dosage of hydrogen peroxide and pending water, the mass ratio of COD is 1:1, the dosage of hydrogen peroxide and Fe 3+mol ratio be 5:1, process water outlet can reach < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level B standard.Inlet and outlet water water quality is as shown in table 2.0.70 yuan/m of Fenton's reaction system RO condensed water processing cost 3.
Table 2 is tested Inlet and outlet water water quality
Project COD(mg/L) TP(mg/L)
Water inlet 55-82 5.5-9.6
Water outlet 56 0.8
Embodiment 3
As Fig. 1, the reverse osmosis concentrated shrink that adopts Fenton's reaction system Treating Municipal Sewage reuse of the present invention to produce, the processing water yield is 40m 3/ d, Fenton's reaction system water-in arranges online COD (chemical oxygen demand (COD)) monitor, when the dense water COD≤60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride and adds, and in the dense water of the dosage of iron(ic) chloride and RO, the mass ratio of total phosphorus is 9:1.As the dense water COD>60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride, hydrogen peroxide adds, and carry out pH regulator, and adjusting pH is 5.Wherein in the dosage of hydrogen peroxide and pending water, the mass ratio of COD is 4:1, the dosage of hydrogen peroxide and Fe 3+mol ratio be 12:1, process water outlet can reach < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level B standard.Inlet and outlet water water quality is as shown in table 3.0.95 yuan/m of Fenton's reaction system RO condensed water processing cost 3.
Table 3 is tested Inlet and outlet water water quality
Project COD(mg/L) TP(mg/L)
Water inlet 54-85 6.2-10.1
Water outlet 58 0.9
Embodiment 4
As Fig. 1, the reverse osmosis concentrated shrink that adopts Fenton's reaction system Treating Municipal Sewage reuse of the present invention to produce, the processing water yield is 50m 3/ d, Fenton's reaction system water-in arranges online COD (chemical oxygen demand (COD)) monitor, when the dense water COD≤60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride and adds, and in the dense water of the dosage of iron(ic) chloride and RO, the mass ratio of total phosphorus is 4:1.As the dense water COD>60mg/L of the RO after denitrogenation processing, adding of agent is set to iron(ic) chloride, hydrogen peroxide adds, and carry out pH regulator, and adjusting pH is 3.Wherein in the dosage of hydrogen peroxide and pending water, the mass ratio of COD is 0.8:1, the dosage of hydrogen peroxide and Fe 3+mol ratio be 4:1, process water outlet can reach < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level B standard.Inlet and outlet water water quality is as shown in table 4.0.83 yuan/m of Fenton's reaction system RO condensed water processing cost 3.
Table 4 is tested Inlet and outlet water water quality
Project COD(mg/L) TP(mg/L)
Water inlet 53-83 5.2-9.1
Water outlet 59 1.0
Comparative example 1
The reverse osmosis concentrated shrink that adopts conventional Fenton's reaction system Treating Municipal Sewage reuse to produce, the processing water yield is 60m 3/ d, Fenton's reaction system water-in does not arrange online COD (chemical oxygen demand (COD)) monitor, and the adding of agent of Fenton's reaction system is that iron(ic) chloride, hydrogen peroxide add, and carries out pH regulator, and adjusting pH is 3.Wherein in the dosage of hydrogen peroxide and pending water, the mass ratio of COD is 2:1, the dosage of hydrogen peroxide and Fe 3+mol ratio be 5:1, process water outlet can reach < < urban wastewater treatment firm pollutant emission standard > > (GB18918-2002) one-level B standard.Inlet and outlet water water quality is as shown in table 5.1.30 yuan/m of Fenton's reaction system RO condensed water processing cost 3.
Table 5 is tested Inlet and outlet water water quality
Project COD(mg/L) TP(mg/L)
Water inlet 52-85 5.3-9.8
Water outlet 56 0.8
Embodiment and comparative example are compared and found out, at Fenton's reaction system water-in, online COD (chemical oxygen demand (COD)) monitor is set, according to the concentration of influent COD, judge the kind of the medicament that will add, reduce the expense of unnecessary adding of agent, reduced the cost of reverse osmosis concentration water treatment.

Claims (3)

1. the Fenton's reaction system of a controlled adding of agent processed, it is characterized in that: Fenton's reaction system water-in is arranged on line chemical oxygen demand COD monitor, when reverse osmosis concentrated water chemical oxygen demand COD≤60mg/L after denitrogenation processing, adding of agent is set to iron(ic) chloride and adds; As the reverse osmosis concentrated water chemical oxygen demand COD >60mg/L after denitrogenation processing, adding of agent is set to iron(ic) chloride and hydrogen peroxide adds, and carry out pH regulator, and adjustment pH is 3-5.
2. the Fenton's reaction system of controlled adding of agent processed according to claim 1, it is characterized in that: during reverse osmosis concentrated water chemical oxygen demand COD >60mg/L after described denitrogenation processing, the mass ratio of the reverse osmosis concentrated water chemical oxygen demand COD after dosage and the denitrogenation processing of hydrogen peroxide is 1:1-3:1; The mol ratio of the dosage of hydrogen peroxide and the Fe3+ of iron(ic) chloride is 5:1-10:1.
3. the Fenton's reaction system of controlled adding of agent processed according to claim 1, it is characterized in that: during reverse osmosis concentrated water chemical oxygen demand COD≤60mg/L after described denitrogenation processing, in the dosage of iron(ic) chloride and reverse osmosis concentrated water, the mass ratio of total phosphorus is 5:1-8:1.
CN201210392753.2A 2012-10-16 2012-10-16 Fenton reaction system capable of controlling medicament feeding Pending CN103723779A (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN103979648A (en) * 2014-06-11 2014-08-13 中国科学院生态环境研究中心 Method for regulating multistage-cascade induction electro-Fenton by graded addition of H2O2 on basis of pH indication
CN107010793A (en) * 2017-06-06 2017-08-04 沈阳建筑大学 A kind of modularization integrated system and its method of work for handling medical intermediate production waste water
CN107215998A (en) * 2016-03-22 2017-09-29 东丽先端材料研究开发(中国)有限公司 A kind of deep treatment method of waste water
CN107857423A (en) * 2017-09-07 2018-03-30 浙江富春紫光环保股份有限公司 A kind of processing system of reverse osmosis concentrated water
CN110066048A (en) * 2019-05-07 2019-07-30 中冶华天工程技术有限公司 Fenton reaction control system

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103979648A (en) * 2014-06-11 2014-08-13 中国科学院生态环境研究中心 Method for regulating multistage-cascade induction electro-Fenton by graded addition of H2O2 on basis of pH indication
CN103979648B (en) * 2014-06-11 2015-07-08 中国科学院生态环境研究中心 Method for regulating multistage-cascade induction electro-Fenton by graded addition of H2O2 on basis of pH indication
CN107215998A (en) * 2016-03-22 2017-09-29 东丽先端材料研究开发(中国)有限公司 A kind of deep treatment method of waste water
CN107010793A (en) * 2017-06-06 2017-08-04 沈阳建筑大学 A kind of modularization integrated system and its method of work for handling medical intermediate production waste water
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CN107857423A (en) * 2017-09-07 2018-03-30 浙江富春紫光环保股份有限公司 A kind of processing system of reverse osmosis concentrated water
CN110066048A (en) * 2019-05-07 2019-07-30 中冶华天工程技术有限公司 Fenton reaction control system
CN110066048B (en) * 2019-05-07 2021-09-24 中冶华天工程技术有限公司 Fenton reaction control system

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Application publication date: 20140416