CN101746886B - Uncoupler - Google Patents

Uncoupler Download PDF

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Publication number
CN101746886B
CN101746886B CN2008102074606A CN200810207460A CN101746886B CN 101746886 B CN101746886 B CN 101746886B CN 2008102074606 A CN2008102074606 A CN 2008102074606A CN 200810207460 A CN200810207460 A CN 200810207460A CN 101746886 B CN101746886 B CN 101746886B
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sludge
tcs
weight reduction
uncoupler
diatomite
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CN101746886A (en
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仓一华
常莉英
姜垒垒
赵海云
吴敏
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Sinopec Shanghai Petrochemical Co Ltd
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Sinopec Shanghai Petrochemical Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

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Abstract

The present invention discloses uncoupler for weight reduction treatment of excess sludge in aerobic sewage treatment process in an activated sludge method. The uncoupler is a composite which contains the components of 3, 3, 4, 5-tetrachlorosalicylanilide and refined diatomite according to the weight ratio of 1: (0.05-1.5). The uncoupler provided by the present invention can reduce the abated effect on sludge activity obviously at the same time of maintaining good sludge weight reduction performance, the positive effect is very obvious which is embodied in that the sludge weight reduction performance is stronger, and added TCS can be reduced by 20-60 percent if the same sludge weight reduction rate is achieved; and when TCS is added into the system, the removal rate of COD is basically unaffected.

Description

A kind of uncoupling agents
Technical field
The present invention relates to a kind of uncoupling agents, particularly be used for active sludge aerobic sewage treatment excess sludge reduction and handle, and main component is 3,3 ', 4 ', the uncoupling agents of 5-tetrachloro-salicylanilide.
Background technology
Activated sludge process is present most widely used sewage (comprising a municipal effluent or industrial sewage) biologic treating technique, though this Technology has a lot of advantages, few as initial cost, treatment effect is good, stable etc., but also there is a significant disadvantage in it, promptly can produce a large amount of excess sludges in operational process.The processing cost of excess sludge is quite high, generally can account for 25%~65% of Sewage Plant operation total expenses, and therefore, the production rate that activated sludge sewage disposal process reduces or reduce excess sludge is the problem of being paid close attention to very much always.Existing commonly used mud decrement technology comprises that mainly extended aeration process, pure-oxygen aeration method, microorganism predation method, aerobic or anaerobic digestion conciliate coupling method etc., although these methods all exist tangible advantage and deficiency separately, but comparatively speaking, wherein the uncoupling method is accepted because of the maximum more people of the amplitude that reduces sludge yield and is had more development prospect.
In activated sludge process, microorganism is pollutent to be removed from waste water as the carbon source and the energy of growth with pollutants in waste water matter (matrix), obviously microorganism growth is relevant with the matrix utilization, and the synthetic energy that also needs to be coupled with it of microorganism to be to form new cell, and this energy is mainly provided by Triphosaden (ATP).ATP then mainly is that oxidation and the phosphorylation by adenosine diphosphate (ADP) (ADP) generates in the microbiological degradation metabolic process, under the normal circumstances, oxidizing reaction and phosphorylation reaction are link coupled, and promptly microorganism changes into simultaneous ADP in the process of pollution substance oxidation the phosphorylation process of ATP.The uncoupling method is to add chemical agent-uncoupling agents in system, makes the coupling relation broken that exists between oxidation and the phosphorylation, suppresses the carrying out of the phosphorylation reaction of generation ATP, thereby makes the microorganism anabolism reduce the purpose that reduces the microorganism productive rate to reach.
Uncoupling agents commonly used in the prior art has 2,2, 4-dinitrophenol, Trichlorophenol, 2,4 dichloro phenol and 3,3 ', 4 ', 5-tetrachloro-salicylanilide (TCS) etc.Wherein TCS significantly uses the most extensive because of the decrement effect to excess sludge, in some active sludge treatment process, the multipotency of the output of mud reduces 40%, " Utilization of ametabolic uncoupler 3 for example, 3 ', 4 ', 5-tetrachlorosalicylanilide (TCS) to reduce sludge growth inactivated sludge culture " (Water Res, 2002,36 (8): 2077-2083) introduced in the literary composition.Although all uncoupling agentss all have a common shortcoming, can make the activity of mud reduce after the i.e. adding system, yet this shortcoming of TCS is more remarkable, " killing and wounding " effect to microorganism is bigger relatively, and this perhaps is that TCS can't thoroughly replace one of main reason of other uncoupling agents.
Summary of the invention
The invention provides a kind of compound uncoupling agents, it is with 3,3 ', 4 ', 5-tetrachloro-salicylanilide (TCS) is a main component, behind the auxiliary component that adds other, can solve effectively that the adding because of TCS causes sludge activity to reduce this technical problem in the Sewage treatment systems.
Below be the technical scheme that the present invention solves the problems of the technologies described above:
A kind of uncoupling agents, the decrement treatment that is used for the aerobic sewage treatment process excess sludge of activated sludge process, this uncoupling agents is a composition, and component comprises 3,3 ', 4 ', 5-tetrachloro-salicylanilide and diatomite, 3,3 ', 4 ', the weight ratio of 5-tetrachloro-salicylanilide and diatomite is 1: (0.05~1.5).
Above-mentioned 3,3 ', 4 ', the weight ratio of 5-tetrachloro-salicylanilide and diatomite is preferably 1: (0.1~0.5); The specific surface area of diatomite is generally got 30~60m 2/ g.
In the activated sludge process Sewage treatment systems, sewage and mud are not to be in the homogeneous admixture each other, although there is the mechanical agitation of aeration, mud serves as main being suspended in the system with micelle particulate form still.The contriver finds that in experiment TCS is very relevant in the concentration of aqueous phase with TCS to " killing and wounding " effect of microorganism, and concentration higher " killing and wounding " effect is bigger.The uncoupling of TCS is then very relevant with the concentration of TCS in mud micelle particle, and concentration heals high uncoupling more greatly.
Essence of the present invention is that TCS and diatomite are hybridly prepared into a kind of compound uncoupling agents according to a certain percentage, the contriver observes in experiment, because diatomite has bigger porosity and specific surface, TCS is not only had stronger adsorption, and loading capacity is very big.When TCS with after diatomite mixes according to a certain percentage, diatomite is as the carrier TCS that adsorbed load, form the compound uncoupling agent of a kind of " loading type ", and be carried on the TCS meeting rapid " dissolving " in water and unlike simple TCS on " carrier ", and slowly discharge with relatively low speed, therefore the compound uncoupling agent of this " loading type " can be regarded as " slowly-releasing " TCS.The contriver finds by further experiment, compares with simple TCS, and the dissolution rate at sewage behind the TCS of this " loading type " input coefficient obviously slows down, and therefore the concentration at the sewage aqueous phase greatly reduces.On the other hand, gather fusedly because the diatomite particle is very easy with mud micelle particle, both gather fused back TCS and will discharge lentamente in " dissolving in " mud micelle, make can obtain higher TCS concentration in the mud micelle.
The mechanism that more than to be exactly compound TCS uncoupling agents provided by the invention can obviously reduce when keeping good mud decrement performance to the abated effect of sludge activity.Positively effect compared with prior art of the present invention is fairly obvious, is embodied in following 2 points:
1) performance of mud decrement is stronger, as reaches same mud decrement rate, and the TCS that adds can reduce 20~60%;
2) add TCS in the system after, the COD clearance is unaffected substantially.
To come below that the present invention is further illustrated by specific embodiment, in an embodiment, the mud decrement rate is defined as:
Figure GSB00000520415700031
Wherein, sludge yield I is the device unit sludge yield that does not add uncoupling agents in the system, and sludge yield II is the device unit sludge yield that adds in the system behind the uncoupling agents.
Embodiment
[embodiment 1~8]
Each embodiment uncoupling agents is prepared in required ratio, and getting specific surface area is 30~60m 2The diatomite of/g, the weight ratio of TCS and diatomite sees Table 1.
Table 1.
Figure GSB00000520415700032
The uncoupling agents of the various embodiments described above preparation adopts following method to carry out experimental test:
The sewage of test is oil refining sewerage, and handles through oil removal, coagulation flotation, and the water quality of water inlet is:
COD 575mg/l
PH value 8.2
Sewage adopts sequencing batch active sludge (SBR technology) to handle, and reactor volume is 8m 3, the processing condition of operation are:
The about 0.9kgBOD of sludge loading 5/ (kgMLVSSd)
20~30 ℃ of temperature of reaction
Dissolved oxygen 2~4mg/l
The uncoupling agents dosage sees Table 2 in the sewage
(in TCS)
Above-mentioned uncoupling agents is stirred to formation suspension with service water earlier, and compound concentration is 2~4g/l, adds with water inlet then.
Experimental test the results are shown in Table 2, and wherein comparative example is for adding TCS merely, and all the other test conditionss are with embodiment 1~8.
Table 2.
Figure GSB00000520415700041

Claims (3)

1. uncoupling agents, the decrement treatment that is used for the aerobic sewage treatment process excess sludge of activated sludge process, this uncoupling agents is a composition, and component comprises 3,3 ', 4 ', 5-tetrachloro-salicylanilide and diatomite, 3,3 ', 4 ', the weight ratio of 5-tetrachloro-salicylanilide and diatomite is 1: (0.05~1.5).
2. uncoupling agents according to claim 1 is characterized in that describedly 3,3 ', 4 ', and the weight ratio of 5-tetrachloro-salicylanilide and diatomite is 1: (0.1~0.5).
3. uncoupling agents according to claim 1, the specific surface area that it is characterized in that described diatomite is 30~60m 2/ g.
CN2008102074606A 2008-12-19 2008-12-19 Uncoupler Active CN101746886B (en)

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Publication number Priority date Publication date Assignee Title
CN105223178A (en) * 2015-10-22 2016-01-06 哈尔滨工业大学 Uncoupler promotes the diagnostic method of mud uncoupling effect

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1803664A (en) * 2005-12-09 2006-07-19 宁波工程学院 Novel active sludge process with reduced excess sludge

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1803664A (en) * 2005-12-09 2006-07-19 宁波工程学院 Novel active sludge process with reduced excess sludge

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
JP特开2005-254066A 2005.09.22
叶芬霞等.化学解耦联剂对活性污泥工艺中剩余污泥的减量作用.《环境科学学报》.2004,第24卷(第3期),第394-398页. *
叶芬霞等.能量解偶联代谢对剩余污泥的减量化研究.《环境科学与技术》.2005,第28卷(第4期),第4-5页. *
李颖等.化学解耦联剂对活性污泥产率的控制作用.《环境科学研究》.2006,第19卷(第3期),第88-90页. *
蒋小龙等.化学解偶联剂对污泥产率的比较研究.《环境科学研究》.2006,第19卷(第4期),第115-118页. *

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