CN103776780A - Method for detecting strength of granular sludge - Google Patents

Method for detecting strength of granular sludge Download PDF

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CN103776780A
CN103776780A CN201410042419.3A CN201410042419A CN103776780A CN 103776780 A CN103776780 A CN 103776780A CN 201410042419 A CN201410042419 A CN 201410042419A CN 103776780 A CN103776780 A CN 103776780A
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sludge
ultrasonic
time
beaker
granular sludge
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CN103776780B (en
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金仁村
郭琼
邢保山
陈辉
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Hangzhou Normal University
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Abstract

The invention provides a method for detecting the strength of granular sludge. The method comprises the following steps: washing granular sludge to be detected with a wet weight of 4.8-5.2g by using distilled water, putting the washed sludge in a 100mL beaker, and adding the distilled water into the beaker until the constant volume is 50mL; fixing the beaker filled with the sludge in an ultrasonic apparatus, and controlling the water temperature to be 24-26 DEG C; setting the ultrasonic frequency to be 20KHZ and the ultrasonic power to be 65W, and starting the ultrasonic apparatus so as to carry out ultrasonic operation on the granular sludge; since the ultrasonic apparatus is started, and sampling a sample of 3mL every 1min; after 10-12 times of sampling is performed, turning off the ultrasonic apparatus, respectively determining the absorbancies of the samples taken at different moments by using a visible spectrophotometer under a wavelength of 600nm; drawing an absorbancy-time curve through taking the sampling time as the abscissa and taking the absorbancy as the ordinate, so as to obtain slopes, namely instability coefficients; and determining that the larger the instability coefficient is, the smaller the mechanical strength of the granular sludge is. The method disclosed by the invention has the advantages of small sludge loss, easiness in operation, wide application, low detection cost, and the like.

Description

A kind of detection method of particle sludge intensity
Technical field
The present invention relates to a kind of detection method of particle sludge intensity.
Background technology
In field of waste water treatment, the advantage such as compared with floc sludge, granule sludge has profile rule, density is large, intensity is high, Stability Analysis of Structures, settling property are outstanding.Adopt the reactor of granule sludge can possess higher biomass and biologically active.Physical strength is the critical nature of granule sludge, and in bio-reactor, particle sludge intensity is the necessary condition that maintains the stability of particle and realize Separation of Solid and Liquid preferably.If only granule strength is carried out to qualitative description, to be not enough to meet research and production required, and quantitatively characterizing is inevitable requirement.But up to now, the method for measuring particle sludge intensity is too complicated, operating process is subject to external condition impact, is unfavorable for it accurately to characterize.
For these problems, a kind of ultrasonic-method of spectrophotometric simple measuring particle sludge intensity as seen that the present invention proposes use.According to ultrasonic cavitation effect, make granule sludge that fragmentation to a certain degree occur, the intensity of degree of crushing and mud is negative correlation, draw corresponding absorbance-time curve by absorbance measurement, draw unstability coefficient, relatively particle sludge intensity, method of operating is simple, and testing cost is low.
Summary of the invention
The object of this invention is to provide a kind of detection method of particle sludge intensity.
The technical solution used in the present invention is:
A detection method for particle sludge intensity, said method comprising the steps of:
(1) getting weight in wet base is preferably 4.9~5.1g of 4.8~5.2g() granule sludge to be measured, clean 3-5 time with distilled water, wash away the impurity of granule sludge adsorption, the mud after cleaning is placed in 100mL beaker, adding distil water is settled to 50mL; The beaker that mud is housed is fixed in Ultrasound Instrument, and water temperature is controlled at 24~26 ℃; It is 20kHz that ultrasonic frequency is set, and ultrasonic power is 65W, opens Ultrasound Instrument, and granule sludge is carried out to ultrasound procedure; From opening Ultrasound Instrument, every 1min sampling 3mL; Sample after 10-12 time, close Ultrasound Instrument, the sample that different time points is obtained under 600nm wavelength, is measured respectively absorbance with visible spectrophotometer;
(2) take sample time as horizontal ordinate, the absorbance of corresponding time is ordinate, draws absorbance-time curve, calculates linear equation, show that corresponding slope is unstability coefficient; Unstability coefficient is larger, shows that granule sludge is easily destroyed by ultrasound wave, and the physical strength of granule sludge is less.
Instrument: ultrasonic device is rated frequency 28kHz Ultrasound Instrument (Hua Shen section work, Shenzhen), and Ultrasound Instrument power is 0-800W.Absorbance measurement equipment is visible spectrophotometer.
The ultrasonic mode at intermittence that described ultrasonic preferred open-10s of employing 10s closes.
The advantage of patent of the present invention is mainly reflected in: 1) the required mud amount of mensuration process is less, can save mud granule; 2) assay method is workable, and location parameter is easy to control, and determination data is processed easy, and result is simple and clear; 3) assay method is applied widely, can measure multiple mud granule; 4) testing cost is low.
Accompanying drawing explanation
Absorbance-time plot of Fig. 1 granule sludge R1.
Absorbance-time plot of Fig. 2 granule sludge R2.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in this:
Embodiment 1: the present embodiment adopts assay method of the present invention to measure the intensity of anaerobic ammonium oxidation granular sludge, specific as follows:
1) get the anaerobic ammonium oxidation granular sludge that the weight in wet base that mixes in a up flow anaerobic sludge blanket reactor is 4.9772g, be designated as R1, from another reactor, getting the weight in wet base mixing is 5.1083g anaerobic ammonium oxidation granular sludge, be designated as R2, respectively clean 5 times with distilled water, wash away the impurity of granule sludge adsorption; 2) above-mentioned granule sludge is placed in respectively in 2 corresponding 100mL beakers, adding distil water is settled to 50mL respectively; 3) beaker that granule sludge to be measured is housed is fixed on to the central authorities of Ultrasound Instrument, water temperature is controlled at 25 ± 1 ℃; 4) ultrasonic frequency being set is 20kHz, and ultrasonic power is 65W, opens Ultrasound Instrument, adopts open-10s of 10s to close intermittently ultrasonic mode, and granule sludge is carried out to ultrasound procedure; 5) from opening Ultrasound Instrument, every 1min sampling 3mL; 6) sample after 10 times, close Ultrasound Instrument, the sample that different time is obtained under 600nm wavelength, is measured respectively absorbance with visible spectrophotometer.7) record data, as shown in table 1, draw absorbance-time curve, absorbance-time plot of granule sludge R1 is shown in Fig. 1, absorbance-time plot of granule sludge R1 is shown in Fig. 2, show that corresponding slope is unstability coefficient, characterizing particles sludge intensity; From Fig. 1,2, the unstability coefficient k of granule sludge R1 1be 0.0176, the k of granule sludge R2 2be 0.0269.Can find out from test result: k1 < k2, illustrates that the physical strength of granule sludge R1 in first reactor is greater than the physical strength of granule sludge R2 in second reactor.
Table 1 data logger
Figure BDA0000463493440000041
Content described in this instructions embodiment is only enumerating of way of realization to inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.

Claims (2)

1. a detection method for particle sludge intensity, is characterized in that said method comprising the steps of:
(1) get the granule sludge to be measured that weight in wet base is 4.8~5.2g, with distilled water cleaning 3-5 time, the mud after cleaning is placed in 100mL beaker, and adding distil water is settled to 50mL; The beaker that mud is housed is fixed in Ultrasound Instrument, and water temperature is controlled at 24~26 ℃; It is 20kHz that ultrasonic frequency is set, and ultrasonic power is 65W, opens Ultrasound Instrument, and granule sludge is carried out to ultrasound procedure; From opening Ultrasound Instrument, every 1min sampling 3mL; Sample after 10-12 time, close Ultrasound Instrument, the sample that different time points is obtained under 600nm wavelength, is measured respectively absorbance with visible spectrophotometer;
(2) take sample time as horizontal ordinate, the absorbance of corresponding time is ordinate, draws absorbance-time curve, calculates linear equation, show that corresponding slope is unstability coefficient; Unstability coefficient is larger, shows that the physical strength of granule sludge is less.
2. the method for claim 1, is characterized in that the ultrasonic mode at intermittence that described ultrasound procedure adopts open-10s of 10s to close.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116067846A (en) * 2022-12-15 2023-05-05 广东工业大学 Method for testing mechanical strength of aerobic granular sludge

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS5624099A (en) * 1979-04-13 1981-03-07 Vizgazdalkodasi Tudomanyos Kut Method and device for conditioning waste water sludge by ultrasonic wave
JPH04331000A (en) * 1991-05-01 1992-11-18 Kubota Corp Dehydrating method of sludge
CN101344469A (en) * 2008-05-14 2009-01-14 中国科学技术大学 Particle sludge intensity measuring instrument and method
CN103196781A (en) * 2013-04-15 2013-07-10 杭州师范大学 Measuring method and device for mechanical strength of granular sludge
CN103245623A (en) * 2013-05-11 2013-08-14 北京工业大学 Method for measuring relative hydrophobicity of granule sludge cells

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624099A (en) * 1979-04-13 1981-03-07 Vizgazdalkodasi Tudomanyos Kut Method and device for conditioning waste water sludge by ultrasonic wave
JPH04331000A (en) * 1991-05-01 1992-11-18 Kubota Corp Dehydrating method of sludge
CN101344469A (en) * 2008-05-14 2009-01-14 中国科学技术大学 Particle sludge intensity measuring instrument and method
CN103196781A (en) * 2013-04-15 2013-07-10 杭州师范大学 Measuring method and device for mechanical strength of granular sludge
CN103245623A (en) * 2013-05-11 2013-08-14 北京工业大学 Method for measuring relative hydrophobicity of granule sludge cells

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A.NOR-ANUAR ET AL.: "Strength characteristics of aerobic granular sludge", 《WATER SCIENCE & TECHNOLOGY》, vol. 65, no. 2, 31 December 2012 (2012-12-31), pages 309 - 316 *
刘永红 等: "抗压实验法厌氧颗粒污泥机械强度的测定及影响因素分析", 《环境工程学报》, vol. 6, no. 11, 30 November 2012 (2012-11-30), pages 4197 - 4202 *
李志华 等: "丝状菌颗粒污泥结构的形成及机理研究", 《中国环境科学学会学术年会论文集(2013)》, 1 August 2013 (2013-08-01) *
栾先玉: "超声破碎剩余污泥的理论与实验研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》, no. 03, 15 March 2013 (2013-03-15) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116067846A (en) * 2022-12-15 2023-05-05 广东工业大学 Method for testing mechanical strength of aerobic granular sludge
CN116067846B (en) * 2022-12-15 2023-08-22 广东工业大学 Method for testing mechanical strength of aerobic granular sludge

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