CN102353753B - Method for directly measuring organic matter degrading amount of activated sludge - Google Patents
Method for directly measuring organic matter degrading amount of activated sludge Download PDFInfo
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- CN102353753B CN102353753B CN201110246515.6A CN201110246515A CN102353753B CN 102353753 B CN102353753 B CN 102353753B CN 201110246515 A CN201110246515 A CN 201110246515A CN 102353753 B CN102353753 B CN 102353753B
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- activated sludge
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Abstract
The invention discloses a method for directly measuring the organic matter degrading amount of activated sludge. The method comprises the following steps of: at normal temperature, putting a mixed solution of the activated sludge to be measured and waste water into a sealed reactor; aerating at the bottom of the sealed reactor with purified oxygen, and measuring and recording the carbon dioxide concentration at an exhaust apparatus on the upper part of the sealed reactor; emptying the sealed reactor, and adding the same volume of parallel sample of the activated sludge to be measured and waste water; aerating at the bottom of the sealed reactor with purified nitrogen, and measuring and recording the carbon dioxide concentration at the exhaust apparatus on the upper part of the sealed reactor; respectively computing the carbon dioxide yield during aeration of the purified oxygen and the purified nitrogen within a certain time slot by using an integral of a product of a gas supply amount and the carbon dioxide concentration within a time slot; computing the carbon dioxide yield during organic matter degradation of the activated sludge by using a difference value; and computing the organic matter degrading amount of the activated sludge. The method has the advantage that the organic matter degrading amount of a unit volume of the activated sludge can be directly measured.
Description
Technical field
The present invention relates to a kind of technical field of measuring organic matter degrading amount of activated sludge, specifically, refer to a kind of method of direct mensuration organic matter degrading amount of activated sludge.
Background technology
Activated sludge process is method conventional in biological wastewater treatment technology, have consumption less, efficiency is high, cost is low, technological operation convenient management is reliable and the advantage such as non-secondary pollution.Being determined in engineering of sludge activity is the important indicator that characterizes operation conditions.Mainly by organic clearance in waste water, reflect now, although, can indirectly indicate sludge activity, said determination method has a precondition, and the organism of getting rid of has been degraded by microorganisms completely.If organic removal is to remove mechanism acting in conjunction by microbial degradation and other, the organic removal rate of waste water cannot accurately reflect sludge activity.At present, lack the amount that direct laboratory facilities are measured active sludge degradation of organic substances.
Summary of the invention
Biological wastewater treatment is to utilize the vital movement of microorganism, make to be in waste water the synthetic new protoplasm of an organic contaminant part of solubilised state or colloidal state, for the growth of microorganism, another part is degraded to carbon dioxide, energy and water, thus a kind of disposal route that waste water is purified.Organism conversion process can represent with following formula.
From above-mentioned organism conversion process, carbon dioxide is a kind of product of organic matter degradation, so, utilize carbon dioxide generating amount, can directly calculate the organic amount of microbial degradation, and then calculate the amount that unit volume active sludge can degradation of organic substances.
Utilize carbon dioxide generating amount can solve the direct mensuration problem of organic matter degrading amount of activated sludge, aspect environmental protection, there is using value, especially can be for the direct mensuration of sludge activity.
The object of the invention is, by measuring the carbon dioxide generating amount that in organism conversion process, organic matter degradation produces, to have solved the problem of direct mensuration organic matter degrading amount of activated sludge.
For achieving the above object, the technical solution used in the present invention is:
A method for direct mensuration organic matter degrading amount of activated sludge, step is as follows: (1) at normal temperatures, packs active sludge to be measured and waste water mixed liquor into one by the closed reactor with aerator, exhaust apparatus, charging aperture, evacuation port; (2) adopt the purity oxygen of regime flow from reactor bottom aeration, by a CO 2 measuring registering instrument that can record instant concentration, measure and record exhaust apparatus place, closed reactor top gas concentration lwevel, utilize air demand and the integrating meter of gas concentration lwevel product within a period of time to calculate between the some time generation of purity oxygen aeration carbon dioxide in section; (3) material in closed reactor is emptying, the parallel sample of same volume active sludge to be measured and waste water is put into closed reactor; (4) adopt the pure nitrogen gas of regime flow from closed reactor bottom aeration, measure and record exhaust apparatus place, closed reactor top gas concentration lwevel, utilize air demand and the integrating meter of gas concentration lwevel product within a period of time to calculate between the some time generation of pure nitrogen gas aeration carbon dioxide in section; (5) by calculation procedure (2), subtract the difference between the resulting carbon dioxide generating amount of step (4), obtain sludge activity degradation of organic substances carbon dioxide generating amount, and then calculate organic matter degrading amount of activated sludge.
In technique scheme, adopt purity oxygen aeration, eliminated the impact of Carbon Dioxide in Air; Adopt pure nitrogen gas aeration, can obtain molten amount of depositing carbon dioxide in mixed liquor, by difference, calculate and eliminate the impact of this factor on measurement result; The CO 2 measuring registering instrument that can record instant concentration, can obtain great amount of carbon dioxide concentration data; Closed reactor has guaranteed that the carbon dioxide generating amount of measuring is whole amounts that in closed reactor, microorganism discharges because of respiration; Measure approaching under true ruuning situation, eliminated the impact of the factors such as temperature on microbial activity.So the integral and calculating of the product by air demand and gas concentration lwevel in minute section, can obtain organic matter degrading amount of activated sludge in certain period.
The present invention has following distinguishing feature:
1, measure environment and approach actual motion environment.
2, measuring principle is reliable, by measuring organic matter degradation carbon dioxide in process generation, directly measures organic matter degrading amount of activated sludge, thereby can apply in a large number the direct mensuration of organic matter degrading amount of activated sludge in various waste water treatment process.
accompanying drawing explanation
Fig. 1 is the structural representation of the device that adopts in the embodiment of the present invention.
Embodiment
In order to make those skilled in the art person understand better technical scheme of the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, a kind of device of measuring carbon dioxide quantity generated during degradation of organic substance by aerobic microorganism, comprises closed reactor 1 and CO 2 measuring registering instrument 2; Described closed reactor 1 top is provided with one and makes packoff 11 and an exhaust apparatus 12 of closed reactor inside and external isolation with the outside opening 13 being communicated with, the opening being communicated with outside 13 that is placed in closed reactor top; Described closed reactor 1 bottom is provided with one and makes the packoff 14 of closed reactor 1 inside and external isolation with the outside opening 15 being communicated with and opening being communicated with outside 15 that is placed in closed reactor 1 bottom, and described exhaust apparatus 12 is connected with described CO 2 measuring registering instrument 2; Described closed reactor 1 bottom is provided with an aerator 4.
A method for direct mensuration organic matter degrading amount of activated sludge, is to realize by above-mentioned a kind of device of measuring carbon dioxide quantity generated during degradation of organic substance by aerobic microorganism, and its specific embodiment is implemented by following steps:
Under normal temperature condition, active sludge to be measured is put into closed reactor 1 together with waste water, the amount that microorganism and carrier thereof and nutrient matrix are put into closed reactor 1 is no more than 2/3rds of closed reactor 1 volume.Adopt the purity oxygen of regime flow from closed reactor 1 bottom, to pass through aerator 4 aerations, by CO 2 measuring registering instrument 2, measure and record closed reactor 1 top exhaust apparatus 12 place's gas concentration lwevels, utilize air demand and the gas concentration lwevel product integral and calculating in minute section carbon dioxide generating amount in the time period, in the purity oxygen aeration time period, titanium dioxide generation computing method are shown in (1) formula.
W
o: the generation (mg) of carbon dioxide in the purity oxygen aeration time period
T
1: determinator brings into operation constantly
T
2: determinator finishes the time of running
Q
o: purity oxygen aerate flux (L/s)
C
t: certain is gas concentration lwevel (mg/L) constantly
Then, closed reactor 1 is emptying, the parallel sample of another group same volume active sludge to be measured and waste water is put into closed reactor 1.
Adopt pure nitrogen gas aeration, be consistent with purity oxygen aerate flux, from closed reactor 1 bottom, pass through aerator 4 aerations, by CO 2 measuring registering instrument 2, measure and record closed reactor 1 top exhaust apparatus 12 place's gas concentration lwevels, utilize air demand and the gas concentration lwevel product integral and calculating in minute length carbon dioxide generating amount in the time period, in the pure nitrogen gas aeration time period, titanium dioxide generation computing method are shown in (2) formula.
W
n: the generation (mg) of carbon dioxide in the pure nitrogen gas aeration time period
Q
n: pure nitrogen gas aerate flux (L/s)
Active sludge to be measured and waste water at a time between section in a degradation of organic substances carbon dioxide generating amount can utilize (3) formula to try to achieve.
W
B＝W
O-W
N (3)
W
b: active sludge degradation of organic substances carbon dioxide generating amount (mg) in certain time period
In unit volume active sludge, degradation of organic substances amount can be tried to achieve by (4) formula.
S: unit volume organic matter degrading amount of activated sludge (mg/L)
V
s: active sludge volume (L)
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. directly measure a method for organic matter degrading amount of activated sludge, step is as follows: (1) at normal temperatures, packs active sludge to be measured and waste water mixed liquor into one by the closed reactor with aerator, exhaust apparatus, charging aperture, evacuation port; (2) adopt the purity oxygen of regime flow from closed reactor bottom aeration, by a CO 2 measuring registering instrument that can record instant concentration, measure and record exhaust apparatus place, closed reactor top gas concentration lwevel, utilize air demand and the integrating meter of gas concentration lwevel product within a period of time to calculate between the some time generation of purity oxygen aeration carbon dioxide in section; (3) material in closed reactor is emptying, the parallel sample of same volume active sludge to be measured and waste water is put into closed reactor; (4) adopt the pure nitrogen gas of regime flow from closed reactor bottom aeration, measure and record exhaust apparatus place, closed reactor top gas concentration lwevel, utilize air demand and the integrating meter of gas concentration lwevel product within a period of time to calculate between the some time generation of pure nitrogen gas aeration carbon dioxide in section; (5) by calculation procedure (2), subtract the difference between the resulting carbon dioxide generating amount of step (4), obtain sludge activity degradation of organic substances carbon dioxide generating amount, and then calculate organic matter degrading amount of activated sludge.
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| CN201110246515.6A CN102353753B (en) | 2011-08-26 | 2011-08-26 | Method for directly measuring organic matter degrading amount of activated sludge |
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| CN110412220A (en) * | 2019-07-25 | 2019-11-05 | 叶建锋 | A kind of method and system of built-up areas drainage pipeline high organic content thorough cut bed mud precise positioning |
| CN113533683A (en) * | 2021-06-02 | 2021-10-22 | 广东新泓环境咨询有限公司 | Surface soil petroleum hydrocarbon pollution early warning method and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133577Y (en) * | 1992-07-21 | 1993-05-19 | 常州能源设备总厂 | Intemittent waste water treating device by active mud method |
| US6143515A (en) * | 1997-10-09 | 2000-11-07 | Saida Ironworks Co., Ltd. | Process for evaluating microbial-degradability of organic matters and apparatus therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3301427B2 (en) * | 2000-02-25 | 2002-07-15 | 株式会社 小川環境研究所 | Wastewater treatment test method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133577Y (en) * | 1992-07-21 | 1993-05-19 | 常州能源设备总厂 | Intemittent waste water treating device by active mud method |
| US6143515A (en) * | 1997-10-09 | 2000-11-07 | Saida Ironworks Co., Ltd. | Process for evaluating microbial-degradability of organic matters and apparatus therefor |
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| Title |
|---|
| JP特开2001-235462A 2001.08.31 |
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