CN1524805A - Method and apparatus for improving treatment efficiency of up-flow type anaerobic sludge bed - Google Patents
Method and apparatus for improving treatment efficiency of up-flow type anaerobic sludge bed Download PDFInfo
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- CN1524805A CN1524805A CNA031340172A CN03134017A CN1524805A CN 1524805 A CN1524805 A CN 1524805A CN A031340172 A CNA031340172 A CN A031340172A CN 03134017 A CN03134017 A CN 03134017A CN 1524805 A CN1524805 A CN 1524805A
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- valent iron
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Abstract
The invention belongs to the field of biological treatment of waste water, in particular a process and apparatus for increasing upstream type anaerobic sludge bed treatment efficiency by using zero valence iron, wherein zero valence iron is added into the waterpower circulating device looped path in the UASB system, i.e. a zero valence iron container, a built-in iron wire or iron powder, the conditioning water will flow through the zero valence iron container and contact the zero valence iron, then flows back to the reactor.
Description
Technical field
The invention belongs to the biological wastewater treatment technology field, be specially a kind of method and device thereof that utilizes Zero-valent Iron to improve the up-flow anaerobic sludge blanket processing efficiency.
Background technology
The anaerobic waste water biologic treating technique is the effective way that realizes removing organic contamination, reduces running cost, obtains application more and more widely at home and abroad during industry and sanitary wastewater are handled.It has that device structure is simple, running maintenance is convenient, floor space is little, do not need aeration, excess sludge is few, generate advantages such as methane.Anaerobic Microbiological Treatment Technology is considered to the core of following sustainability Environmental Biotechnology.
Up-flow anaerobic sludge blanket treatment technology (UASB) is typical case's representative of anaerobic waste water biologic treating technique.Since twentieth century UASB seventies technology is invented, obtained tremendous development by updating, the UASB technology has become one of mainstream technology of domestic and international anaerobic treatment in recent years.
The main treating processes of UASB technology is as follows: pending waste water is introduced into the bottom of UASB reactor, the Sludge Bed of upwards flowing through and forming by particulate state or floc sludge, sewage contacts with Sludge Bed and anaerobic reaction takes place and produce biogas (being mainly methane and carbonic acid gas), the biogas that produces rise and cause the Sludge Bed disturbance and drive granule sludge and rise, under the effect of triphase separator, granule sludge is descended, get back to the Sludge Bed zone, thereby form the internal recycling of granule sludge, the biogas that produces utilize through being collected behind the triphase separator again, sewage is discharged system after treatment.In general, the UASB reactor need keep a stable up-flow speed by a waterpower circulation device, thereby is formed and keep the good granule sludge of sedimentation function, and this is a key normally moving the UASB system.As shown in Figure 1, existing UASB reactor assembly is general main to comprise following a few part: water inlet and water dispensing apparatus 1, waterpower circulation device 2, reactor body and granular mud bed 3, three separators 4, and sludge gas collecting device 5, water outlet 6.
But at present the UASB technology still has some limitation in its further wide popularization and application, as: lower in temperature, organic loading is lower or waste water under the more situation of difficult degradation composition, its processing efficiency is undesirable.In recent years, various countries scientist and technician conduct a research respectively from different perspectives, with the processing efficiency of further raising up-flow anaerobic sludge blanket.
Summary of the invention
The object of the present invention is to provide a kind of method and device thereof that utilizes Zero-valent Iron to improve the up-flow anaerobic sludge blanket processing efficiency, lower in temperature, organic loading is lower or waste water under the more situation of difficult degradation composition, its processing efficiency is still more satisfactory.
Technical scheme of the present invention is:
A kind of method that improves the up-flow anaerobic sludge blanket processing efficiency, in the waterpower circulation device circulating path of up-flow anaerobic sludge blanket treatment reactor system, add Zero-valent Iron, fully contact with Zero-valent Iron when making sewage under anaerobic flow through return-flow system, and then flow back to reactor and contact with granule sludge and obtain and handle.
Described Zero-valent Iron is iron wire, iron powder or iron filings.
The device that aforesaid method adopts adds a Zero-valent Iron container in the waterpower circulation device circulating path of up-flow anaerobic sludge blanket treatment reactor system, place Zero-valent Iron in the container.
It is airtight that described Zero-valent Iron container keeps, and valve and opening are arranged.
Advantage of the present invention and beneficial effect are:
1, the inventive method is some special reinfocing effects that utilize Zero-valent Iron under anaerobic to form, fully contact with Zero-valent Iron when making sewage under anaerobic flow through the UASB return-flow system, and then flow back to reactor and contact with granule sludge and obtain and handle, make the sewage treating efficiency of UASB system obtain to improve.It utilizes the method for adding Zero-valent Iron up-flow anaerobic sludge blanket technology to be improved and reached the purpose of raising processing efficiency, breadboard existing result of study shows: the UASB system after the improvement can make processing efficiency improve 10～16%, and, this improvement is very little to the device structure and the operational conditions influence of original system, and the cost increase is also very little.
2, apparatus of the present invention are to add supplementary unit one a Zero-valent Iron container in the waterpower circulating path of existing UASB reactor assembly, place the Zero-valent Iron of various ways such as thin wire, iron powder or iron filings in the container, make the pending waste water Zero-valent Iron container of flowing through, contact with Zero-valent Iron wherein, the Zero-valent Iron container can have multiple shape and size, and this need be complementary with the operating parameter of reactor, and it is airtight that the Zero-valent Iron container keeps, and valve and opening are arranged, be convenient to regularly add and change Zero-valent Iron.
Description of drawings
Fig. 1. existing UASB reactor assembly synoptic diagram.
Fig. 2. the UASB reactor assembly synoptic diagram after the improvement.
Embodiment
In the operational process of UASB system, generally need keep a stable up-flow speed (to be generally 0.1～5m/h) by the waterpower circulation device, the present invention is by adding Zero-valent Iron in the waterpower circulating path, and the multiple special reinfocing effect of anerobic sowage being handled by Zero-valent Iron under anaerobic realizes improving the purpose of up-flow anaerobic sludge blanket processing efficiency.As shown in Figure 2, UASB reactor assembly after the improvement comprises into water and water dispensing apparatus 1, waterpower circulation device 2, reactor body and granular mud bed 3, triphase separator 4, sludge gas collecting device 5, water outlet 6, Zero-valent Iron container 7, Zero-valent Iron is placed on an airtight Zero-valent Iron container 7 that is arranged in the waterpower circulating path, Zero-valent Iron can adopt multiple multi-form Zero-valent Iron, as iron powder, iron filings, thin wire etc., as long as it is not have bigger specific surface area, strict to the requirement of Zero-valent Iron form here.When sewage continues to flow through this Zero-valent Iron container, contact with Zero-valent Iron.Under anaerobic, Zero-valent Iron may have following several special effects: 1) produce hydrogen, and then promote methanogenesis, 2) reduce pollutent toxicity, promote its degraded, 3) strengthen the throwing out of pollutent.
The present invention is a foundation with the lab investigation result of study, has proved that it improves the feasibility of sewage treating efficiency.By having adopted the comparative studies of two reactors, one is the reactor of having used Zero-valent Iron in two reactors, another is the control reactor that does not adopt Zero-valent Iron, the reactor of having used Zero-valent Iron has more the Zero-valent Iron container of built-in iron powder, iron filings or a thin wire according to reactor except comparison, and other composition structure and operational conditions are all identical with control reactor.
Passed through the experiment operation of 38 days lab investigation level, obtained experimental datas such as following main operating parameter and operation result, proved that the present invention can significantly improve processing efficiency:
Table 1. is used the main operating parameter of zero-valent iron reactor and control reactor
| Operating parameter | Fs (0～16 day) (n=8 *) | Subordinate phase (16～38 days) (n=11) |
| Up-flow speed (m/h) | 1 | ??1 |
| Water inlet COD (mg/L) | 405(83) ** | ??562(75) |
| Volumetric loading (g/Lday) | 1.027(0.166) | ??1.386(0.201) |
| Hydraulic detention time (hour) | 9.4(0.5) | ??9.8(1.4) |
| Temperature (℃) | 32 | ??32 |
*: n is the number of times of parametric measurement;
*: in the bracket is standard deviation.
Table 2. is used the main operation result of zero-valent iron reactor and control reactor
| Location parameter (0～38 day, n=19 *) | Use the reactor of Zero-valent Iron | Control reactor | Increase per-cent with respect to control reactor |
| CH 4Generation (L/Lday) | 0.257(0.150 **)A *** | 0.236(0.129)B | 9.1％ |
| Water outlet COD t(mg/L) | 58(19)A | ?69(16)B | -16.0％ |
| Water outlet COD s/COD t(％) | 39.5(3.9)A | ?46.3(3.6)B | -14.6％ |
| COD clearance (%) | 87.9(4.3)A | ?85.6(3.5)B | 2.6％ |
*: n is the number of times of parametric measurement;
*: in the bracket is standard deviation;
* *: the significance of difference level of two groups of data mean values of different letter representations reaches 5%.
Claims (4)
1, a kind of method that improves the up-flow anaerobic sludge blanket processing efficiency, it is characterized in that: add Zero-valent Iron in the waterpower circulation device circulating path of up-flow anaerobic sludge blanket treatment reactor system, fully contact with Zero-valent Iron when making sewage under anaerobic flow through return-flow system, and then flow back to reactor and contact with granule sludge and obtain and handle.
2, according to the described device of claim 2, it is characterized in that: Zero-valent Iron is iron wire, iron powder or iron filings.
3, the device that adopts according to the described method of claim 1 is characterized in that: add a Zero-valent Iron container in the waterpower circulation device circulating path of up-flow anaerobic sludge blanket treatment reactor system, place Zero-valent Iron in the container.
4, according to the described device of claim 3, it is characterized in that: the Zero-valent Iron container keeps airtight, and valve and opening are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031340172A CN1234622C (en) | 2003-09-17 | 2003-09-17 | Method and apparatus for improving treatment efficiency of up-flow type anaerobic sludge bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031340172A CN1234622C (en) | 2003-09-17 | 2003-09-17 | Method and apparatus for improving treatment efficiency of up-flow type anaerobic sludge bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1524805A true CN1524805A (en) | 2004-09-01 |
| CN1234622C CN1234622C (en) | 2006-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031340172A Expired - Fee Related CN1234622C (en) | 2003-09-17 | 2003-09-17 | Method and apparatus for improving treatment efficiency of up-flow type anaerobic sludge bed |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591064B (en) * | 2009-06-27 | 2011-02-09 | 大连理工大学 | Anaerobic built-in zero-valent iron reactor |
| CN101693583B (en) * | 2009-10-16 | 2011-05-11 | 东北电力大学 | Biochemical comprehensive treatment method for 1, 3-propylene glycol fermentation organism waste water |
| CN102060368A (en) * | 2010-11-24 | 2011-05-18 | 南京大学 | Method for improving utilization rate of zero-valent iron in zero-valent iron pretreatment of chemical wastewater |
| CN105776530A (en) * | 2016-04-22 | 2016-07-20 | 浙江大学 | Self-shelling malysite denitrification reaction device and self-shelling method |
-
2003
- 2003-09-17 CN CNB031340172A patent/CN1234622C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591064B (en) * | 2009-06-27 | 2011-02-09 | 大连理工大学 | Anaerobic built-in zero-valent iron reactor |
| CN101693583B (en) * | 2009-10-16 | 2011-05-11 | 东北电力大学 | Biochemical comprehensive treatment method for 1, 3-propylene glycol fermentation organism waste water |
| CN102060368A (en) * | 2010-11-24 | 2011-05-18 | 南京大学 | Method for improving utilization rate of zero-valent iron in zero-valent iron pretreatment of chemical wastewater |
| CN105776530A (en) * | 2016-04-22 | 2016-07-20 | 浙江大学 | Self-shelling malysite denitrification reaction device and self-shelling method |
| CN105776530B (en) * | 2016-04-22 | 2018-05-29 | 浙江大学 | One kind is from shell molysite denitrogenation reactor and from shell method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1234622C (en) | 2006-01-04 |
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