CN1765778A - Railway wash water recovery and utilization method - Google Patents
Railway wash water recovery and utilization method Download PDFInfo
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- CN1765778A CN1765778A CNA2005100290683A CN200510029068A CN1765778A CN 1765778 A CN1765778 A CN 1765778A CN A2005100290683 A CNA2005100290683 A CN A2005100290683A CN 200510029068 A CN200510029068 A CN 200510029068A CN 1765778 A CN1765778 A CN 1765778A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The recycle method for railway washing sewage comprises steps shown below: (1) removing the seston in sewage by grid screen to flow into anaerobic hydrolysis pond; (2) acidifying the LAS in sewage and organic into micromolecular organic by anaerobic active sludge; (3) entering membrane bioreactor, oxidizing said organic into carbon dioxide and water totally by aerobic active sludge, and recycling the residual clear water with material less than intercept diameter. This method uses MBR as main body and has high efficiency with low cost.
Description
Technical field
What the present invention relates to is a kind of method of environmental technology field, specifically, is a kind of railway wash water recovery and utilization method.
Background technology
The washing composition of using in the laundry of railway systems is made up of tensio-active agent and some auxiliary agents, and the washing composition that contains anion surfactant uses the most extensive.The main component of anion surfactant is linear alkylbenzene sulphonic acid (LAS), and it is not single compound, may comprise having the several of different chain length and isomer or whole 26 relevant compounds.Auxiliary agent mainly is made of ancillary components such as increasing clean agent, SYNTHETIC OPTICAL WHITNER, white dyes, corrosion inhibitor, foaming regulator, enzyme.Anion surfactant is a kind of water pollutant widely, and lasting chronic toxicity effect is arranged, and to human body, animals and plants, particularly hydrobiological toxic action can not be ignored.In addition, it can make hydrophobic organic emulsification such as the petroleum products that enters water body, PCB, PAH and disperse, and has increased the difficulty of wastewater treatment, thereby has brought difficulty to treatment plant's running.Except that above-mentioned substance, also there are pollutents such as other organism and suspended solid in the railway wash water.Develop many effective treatment craft to reach the purpose of purification at this type of sewage people, mainly contained micro-electrolysis method, A/O contact oxidation method, A2/O system process, SBR activated sludge process, coagulation-biochemical process, ultrasonic irradiation method etc. at present.These technologies differ from one another, and can remove organism, anion surfactant and various auxiliary agent in the sewage effectively, and can realize the purpose of qualified discharge.But above-mentioned treatment process only can qualified discharge, all is difficult to reach the purpose of reuse, and technology is complicated, and operability is not high, and fixed investment is bigger, and operation and handling cost are higher.
Find by prior art documents, Lee Ling is in " the railway washes is handled and the reuse project design " (" Chinese water supply and drainage ", 2000,16 (4): 34-36) in the literary composition, mention the purpose that adopts materialization combination process processing railway washes and realize reuse, flow process is as follows: 1. former water, and 2. grid is 3. regulated settling tank, 4. coagulating sedimentation or air supporting, 5. sand filtration, 6. sterilization, 7. reuse.
This technical process is more numerous, and it is more to relate to operating unit, and therefore, required fixed investment is bigger, and operation and handling cost are also bigger.The sand filtration space is bigger, is mainly used to intercept bigger colloidal solid, still has less colloidal solid (comprising unicellular microorganism), organism, tensio-active agent and auxiliary agent after filtering.Still can not effectively remove these materials after the sterilization, microorganism corpse and other organism can produce peculiar smell after the reuse, and supply nutrients for the microorganism in the cloth.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of railway wash water recovery and utilization method is provided, make it on the basis of railway washes qualified discharge, based on membrane bioreactor (MBR), efficient low-consume, reuse railway wash water.
The present invention is achieved by the following technical solutions, and the present invention adopts following biochemical process step: 1. laundry wash water, 2. grid, 3. anaerobic hydrolysis-acidification pond, 4. membrane bioreactor, 5 reuses.
The present invention includes following steps:
(1) the laundry wash water is earlier through grid, and interval of grid strip enters anaerobic fixed film reactor smaller or equal to 30mm behind the suspended substance in the removal sewage;
(2) water outlet by grid enters the anaerobic hydrolysis-acidification pond.In the anaerobic hydrolysis-acidification pond, anaerobic activated sludge concentration is between 2.5g/L～35.0g/L, and hydraulic detention time is greater than 5hr.In this process, acidifying becomes small organic molecule to anaerobic activated sludge with hydrolysis of organic matter with macromole LAS in the sewage, and water outlet enters membrane bioreactor;
(3) water outlet in anaerobic hydrolysis-acidification pond enters membrane bioreactor.In membrane bioreactor, aerobic activated sludge concentration is between 0.5g/L～8.0g/L, and dissolved oxygen is greater than 0.8mg/L, hydraulic detention time between 2hr～10hr, microfiltration membrane hold back diameter smaller or equal to 10 μ m, working pressure is between 0.3～4.0bar.In this process, the small organic molecule exhaustive oxidation that aerobic activated sludge forms the acidication stage becomes carbonic acid gas and water, and the material permeance film of holding back diameter less than film forms clear water, clear water reuse.
Principle of work of the present invention is: the effect of grid is mainly used to stop suspended substance bigger in the wash water of laundry to enter subsequent technique, guarantees carrying out smoothly of subsequent technique; Anaerobic hydrolysis-acidification is the pre-treatment of membrane biological reaction, is directly connected to the operating performance of membrane bioreactor.The anaerobic activated sludge outward appearance is the black flock, mainly form, under oxygen free condition, carry out Metabolic activity, can secrete extracellular enzyme catalysis larger molecular organics and resolve into small organic molecule by acid formers group, sewage pH value decreases, and respective process is referred to as acidication.The principal pollutant of railway wash water are LAS and organism, and the LAS of higher concentration also can hinder microbic activity and propagation, thereby have increased the biological degradation difficulty of sewage, therefore take earlier sewage to be carried out anaerobic hydrolysis-acidification and handle.Acid formers carries out biocatalytic reaction by the immobilized enzyme that discharges the free enzyme in extracellular or be connected on the mantle, is LAS and organic matter degradation to be fit to the processable small-molecule substance that aerobic microbiological is handled, improve the biodegradability of sewage, make sewage in follow-up aerobe process, to obtain handling with the less energy consumption and the short residence time; The fine or not direct relation of membrane bioreactor operating performance the win or lose of this technology, is key point of the present invention.Membrane bioreactor is the biological treatment system that activated sludge process and embrane method are combined, and the present invention adopts aerobic activated sludge and microfiltration membrane, and array mode can be integral type or separated type.The aerobic activated sludge outward appearance is the khaki color flock, mainly form by heterotrophic organism and protobiont, carry out Metabolic activity under aerobic conditions, its effect is that exhaustive oxidation becomes carbonic acid gas and water under intracellular enzyme catalysis in the small organic molecule suction body that the acidication stage is formed.The effect of microfiltration membrane is organism, tensio-active agent, auxiliary agent and the aerobic microbiological of holding back in the sewage, increases the concentration of substrate and microorganism, thereby improves the degradation capability of microorganism to pollutent greatly.The material permeance film of holding back diameter less than film forms clear water, and water quality can reach " railway quality of reused water standard " (TB/T3007-2000), can realize the purpose of reuse.
The present invention takes earlier sewage to be carried out anaerobic hydrolysis-acidification and handles, is LAS and organic matter degradation to be fit to the processable small-molecule substance that aerobic microbiological is handled, improve the biodegradability of sewage, make sewage in follow-up membrane bioreactor, to obtain handling, improved the operational efficiency of total system greatly with the less energy consumption and the short residence time.Because the crown_interception of microfiltration membrane in the membrane bioreactor, system's effluent quality is more stable, and reaches " railway quality of reused water standard " (TB/T3007-2000), thereby realizes the purpose of reuse.Because the microorganism concn in the crown_interception of microfiltration membrane, membrane bioreactor is higher, thereby biochemical efficiency is fast, device processing volume load is big, and equipment takes up an area of few.In membrane bioreactor, hydraulic detention time separates fully with sludge retention time, so the technology flexible operation is stable, is easy to realize automatic control, convenient operation and management.Excess sludge production is lower in membrane bioreactor.
Embodiment
Embodiment 1
The present invention includes following steps:
(1) the laundry wash water is earlier through grid, and interval of grid strip is smaller or equal to 30mm, enters anaerobic fixed film reactor after removing suspended substance bigger in the sewage;
(2) water outlet by the lattice canopy enters the anaerobic hydrolysis-acidification pond.In the anaerobic hydrolysis-acidification pond, sludge concentration is 12.5g/L, and hydraulic detention time is 15hr.In this process, acidifying becomes small organic molecule to anaerobic activated sludge with hydrolysis of organic matter with macromole LAS in the sewage, and water outlet enters membrane bioreactor;
Described anaerobic activated sludge is made up of acid formers group, carries out Metabolic activity under oxygen free condition, can secrete extracellular enzyme catalysis larger molecular organics and resolve into small organic molecule.
(3) water outlet in anaerobic hydrolysis-acidification pond enters membrane bioreactor.In membrane bioreactor, sludge concentration is 4.5g/L, and dissolved oxygen is 1.2mg/L, and hydraulic detention time is 6hr, and the diameter of holding back of microfiltration membrane is 5 μ m, and working pressure is 0.8bar.In this process, the small organic molecule exhaustive oxidation that aerobic activated sludge forms the acidication stage becomes carbonic acid gas and water, and the material permeance film of holding back diameter less than film forms clear water, clear water reuse.
Described aerobic activated sludge mainly is made up of heterotrophic organism and protobiont, carries out Metabolic activity under aerobic conditions, and its effect is that exhaustive oxidation becomes carbonic acid gas and water under intracellular enzyme catalysis in the small organic molecule suction body that the acidication stage is formed.
The present embodiment implementation result: the total system effluent quality is as follows: the mean value of COD is 40.84mg/L, and wherein LAS mean value is 0.45mg/L; Total phosphorus mean value is 0.07mg/L; NH
3-N mean value 5.37mg/L; The clearance of SS is 100%; PH mean value is 7.3.Effluent quality reaches railway quality of reused water standard (TB/T3007-2000) fully.
Embodiment 2
The present invention includes following steps:
(1) the laundry wash water is earlier through grid, and interval of grid strip is smaller or equal to 30mm, enters anaerobic fixed film reactor after removing suspended substance bigger in the sewage;
(2) water outlet by the lattice canopy enters the anaerobic hydrolysis-acidification pond.In the anaerobic hydrolysis-acidification pond, sludge concentration is 2.5g/L, and hydraulic detention time is 5hr.In this process, acidifying becomes small organic molecule to anaerobic activated sludge with hydrolysis of organic matter with macromole LAS in the sewage, and water outlet enters membrane bioreactor;
Described anaerobic activated sludge mainly is made up of acid formers group, carries out Metabolic activity under oxygen free condition, can secrete extracellular enzyme catalysis larger molecular organics and resolve into small organic molecule.
(3) water outlet in anaerobic hydrolysis-acidification pond enters membrane bioreactor.In membrane bioreactor, sludge concentration is 0.5g/L, and dissolved oxygen is 0.8mg/L, and hydraulic detention time is 2hr, and the diameter of holding back of microfiltration membrane is 10 μ m, and working pressure is 4.0bar.In this process, the small organic molecule exhaustive oxidation that aerobic activated sludge forms the acidication stage becomes carbonic acid gas and water, and the material permeance film of holding back diameter less than film forms clear water, clear water reuse.
Described aerobic activated sludge mainly is made up of heterotrophic organism and protobiont, carries out Metabolic activity under aerobic conditions, and its effect is that exhaustive oxidation becomes carbonic acid gas and water under intracellular enzyme catalysis in the small organic molecule suction body that the acidication stage is formed.
The present embodiment implementation result: system's effluent quality is as follows: the mean value of COD is 48.56mg/L, and wherein LAS mean value is 0.93mg/L; Total phosphorus mean value is 0.15mg/L; NH
3-N mean value 8.72mg/L; The clearance of SS is 95%; PH mean value is 8.5.Effluent quality reaches railway quality of reused water standard (TB/T3007-2000) fully.
Embodiment 3
The present invention includes following steps:
(1) the laundry wash water is earlier through grid, and interval of grid strip is smaller or equal to 30mm, enters anaerobic fixed film reactor after removing suspended substance bigger in the sewage;
(2) water outlet by grid enters the anaerobic hydrolysis-acidification pond.In the anaerobic hydrolysis-acidification pond, sludge concentration is 35.0g/L, and hydraulic detention time is 48hr.In this process, acidifying becomes small organic molecule to anaerobic activated sludge with hydrolysis of organic matter with macromole LAS in the sewage, and water outlet enters membrane bioreactor;
Described anaerobic activated sludge mainly is made up of acid formers group, carries out Metabolic activity under oxygen free condition, can secrete extracellular enzyme catalysis larger molecular organics and resolve into small organic molecule.
(3) water outlet in anaerobic hydrolysis-acidification pond enters membrane bioreactor.In membrane bioreactor, sludge concentration is 8.0g/L, and dissolved oxygen is 1.8mg/L, and hydraulic detention time is 10hr, and the diameter of holding back of microfiltration membrane is 0.8 μ m, and working pressure is 0.3bar.In this process, the small organic molecule exhaustive oxidation that aerobic activated sludge forms the acidication stage becomes carbonic acid gas and water, and the material permeance film of holding back diameter less than film forms clear water, clear water reuse.
Described aerobic activated sludge mainly is made up of heterotrophic organism and protobiont, carries out Metabolic activity under aerobic conditions, and its effect is that exhaustive oxidation becomes carbonic acid gas and water under intracellular enzyme catalysis in the small organic molecule suction body that the acidication stage is formed.
The present embodiment implementation result: system's effluent quality is as follows: the mean value of COD is 11.25mg/L, and wherein LAS mean value is 0.21mg/L; Total phosphorus mean value is 0.05mg/L; NH
3-N mean value 3.35mg/L; The clearance of SS is 100%; PH mean value is 6.5.Effluent quality reaches railway quality of reused water standard (TB/T3007-2000) fully.
Claims (10)
1. a railway wash water recovery and utilization method is characterized in that, may further comprise the steps:
(1) the laundry wash water enters anaerobic fixed film reactor earlier through grid behind the suspended substance in the removal sewage;
(2) water outlet by the lattice canopy enters the anaerobic hydrolysis-acidification pond, and acidifying becomes small organic molecule to anaerobic activated sludge with hydrolysis of organic matter with macromole LAS in the sewage, and water outlet enters membrane bioreactor;
(3) water outlet in anaerobic hydrolysis-acidification pond enters membrane bioreactor, and the small organic molecule that aerobic activated sludge forms the acidication stage is oxidized to carbonic acid gas and water, and the material permeance film of holding back diameter less than film forms clear water, clear water reuse.
2. railway wash water recovery and utilization method according to claim 1, it is characterized in that, described anaerobic activated sludge outward appearance is the black flock, group forms by acid formers, under oxygen free condition, carry out Metabolic activity, can secrete extracellular enzyme catalysis larger molecular organics and resolve into small organic molecule, sewage pH value decreases.
3. railway wash water recovery and utilization method according to claim 1, it is characterized in that, described aerobic activated sludge outward appearance is the khaki color flock, form by heterotrophic organism and protobiont, under aerobic conditions, carry out Metabolic activity, its effect is that exhaustive oxidation becomes carbonic acid gas and water under intracellular enzyme catalysis in the small organic molecule suction body that the acidication stage is formed.
4. railway wash water recovery and utilization method according to claim 1 is characterized in that, described grid, and its interval of grid strip is smaller or equal to 30mm.
5. railway wash water recovery and utilization method according to claim 1 and 2 is characterized in that, described anaerobic activated sludge, and its concentration is between 2.5g/L～35.0g/L.
6. railway wash water recovery and utilization method according to claim 1 is characterized in that, described step (2), and in the anaerobic hydrolysis-acidification pond, hydraulic detention time is greater than 5hr.
7. according to claim 1 or 3 described railway wash water recovery and utilization methods, it is characterized in that, described aerobic activated sludge, its concentration is between 0.5g/L～8.0g/L.
8. railway wash water recovery and utilization method according to claim 1 is characterized in that, described step (3), and in membrane bioreactor, working pressure is between 0.3～4.0bar.
9. railway wash water recovery and utilization method according to claim 1 is characterized in that, described step (3), and dissolved oxygen is greater than 0.8mg/L, and hydraulic detention time is between 2hr～10hr.
10. railway wash water recovery and utilization method according to claim 8 is characterized in that, described membrane bioreactor, its microfiltration membrane hold back diameter smaller or equal to 10 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100290683A CN1765778A (en) | 2005-08-25 | 2005-08-25 | Railway wash water recovery and utilization method |
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| CNA2005100290683A CN1765778A (en) | 2005-08-25 | 2005-08-25 | Railway wash water recovery and utilization method |
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| CN1765778A true CN1765778A (en) | 2006-05-03 |
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| CNA2005100290683A Pending CN1765778A (en) | 2005-08-25 | 2005-08-25 | Railway wash water recovery and utilization method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572825A (en) * | 2013-08-05 | 2014-02-12 | 宁夏大学 | Water-saving campus laundry |
| CN104163548A (en) * | 2014-08-07 | 2014-11-26 | 深圳市丰绿环保科技有限公司 | Zero discharge sewage treatment method |
| CN104445841A (en) * | 2014-12-31 | 2015-03-25 | 上海发凯化工有限公司 | Treatment device and treatment process for surfactant waste water |
| CN106630389A (en) * | 2016-11-22 | 2017-05-10 | 北京交通大学 | Treatment system and method for high-speed-railway passenger-transport washing sewage |
| CN112374686A (en) * | 2020-09-01 | 2021-02-19 | 重庆大学 | Surface runoff collecting, purifying, storing and recycling system for railway storage yard |
| CN112645532A (en) * | 2019-10-12 | 2021-04-13 | 江苏沛尔膜业股份有限公司 | Vehicle washing wastewater treatment process |
| CN112939210A (en) * | 2021-02-06 | 2021-06-11 | 重庆大学 | Integrated sewage treatment device and method utilizing carbon capture and aerobic granular sludge |
| CN115340257A (en) * | 2022-08-04 | 2022-11-15 | 上海琸源水生态环境工程有限公司 | Carbon emission reduction method for sewage treatment |
-
2005
- 2005-08-25 CN CNA2005100290683A patent/CN1765778A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572825A (en) * | 2013-08-05 | 2014-02-12 | 宁夏大学 | Water-saving campus laundry |
| CN104163548A (en) * | 2014-08-07 | 2014-11-26 | 深圳市丰绿环保科技有限公司 | Zero discharge sewage treatment method |
| CN104163548B (en) * | 2014-08-07 | 2016-06-01 | 深圳市丰绿环保科技有限公司 | A kind of zero release sewage water treatment method |
| CN104445841A (en) * | 2014-12-31 | 2015-03-25 | 上海发凯化工有限公司 | Treatment device and treatment process for surfactant waste water |
| CN106630389A (en) * | 2016-11-22 | 2017-05-10 | 北京交通大学 | Treatment system and method for high-speed-railway passenger-transport washing sewage |
| CN112645532A (en) * | 2019-10-12 | 2021-04-13 | 江苏沛尔膜业股份有限公司 | Vehicle washing wastewater treatment process |
| CN112374686A (en) * | 2020-09-01 | 2021-02-19 | 重庆大学 | Surface runoff collecting, purifying, storing and recycling system for railway storage yard |
| CN112374686B (en) * | 2020-09-01 | 2022-11-29 | 中铁二院重庆勘察设计研究院有限责任公司 | Surface runoff collecting, purifying, storing and recycling system for railway storage yard |
| CN112939210A (en) * | 2021-02-06 | 2021-06-11 | 重庆大学 | Integrated sewage treatment device and method utilizing carbon capture and aerobic granular sludge |
| CN115340257A (en) * | 2022-08-04 | 2022-11-15 | 上海琸源水生态环境工程有限公司 | Carbon emission reduction method for sewage treatment |
| CN115340257B (en) * | 2022-08-04 | 2024-05-03 | 上海琸源水生态环境工程有限公司 | Sewage treatment carbon emission reduction method |
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