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Measuring method and device for mechanical strength of granular sludge

A granular sludge and mechanical strength technology, applied in the direction of weighing by removing certain components, can solve the problems of complex operation of the measurement method and high test cost, and achieve easy measurement parameters, low test cost, and strong operability Effect

Active Publication Date: 2013-07-10
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of complicated operation and high test cost of the current measuring method for the mechanical strength of granular sludge, the present invention proposes a measuring method and measuring device for the mechanical strength of granular sludge with simple operation, low testing cost and accurate measurement

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  • Measuring method and device for mechanical strength of granular sludge
  • Measuring method and device for mechanical strength of granular sludge
  • Measuring method and device for mechanical strength of granular sludge

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Embodiment 1

[0020] Embodiment 1: refer to figure 1 According to the measuring method and measuring device of the present invention, the mechanical strength of the anammox granular sludge is measured, specifically as follows: (1) take 50g of the anammox granular sludge to be tested, and use a screening device Screen out granular sludge with a particle size of less than 0.2mm; (2) Add 1L of distilled water to the cylinder, where the cylinder has a height-to-diameter ratio of 5 and a volume of 1.4L, and the particle size obtained in step (1) is greater than 0.2 mm of granular sludge is mixed into distilled water; (3) Turn on the air compressor, adjust the air flow meter to control the aeration rate to 160L / h, and the gas can be evenly distributed through the microporous air distribution device at the bottom of the cylinder, so that the inside of the cylinder The shear force of the granular sludge is the same, and the granular sludge in the cylinder is fully mixed with distilled water to form...

Embodiment 2

[0023] Embodiment 2: refer to figure 1 According to the measuring method and measuring device of the present invention, the mechanical strength of the methanogenic granular sludge was measured, specifically as follows: (1) Take 30 g of the methanogenic granular sludge to be tested, and use a screening device to screen out the particle size Granular sludge smaller than 0.2mm; (2) Add 1L of distilled water into the cylinder, wherein the cylinder has a height-to-diameter ratio of 5 and a volume of 1.4L, and the granular sludge with a particle size greater than 0.2mm obtained in step (1) Mix the mud into distilled water; (3) Turn on the air compressor, adjust the air flow meter to control the aeration rate to 200L / h, and the gas can be evenly distributed through the microporous air distribution device at the bottom of the cylinder, so that the granular sludge in the cylinder Under the same shear force, the granular sludge in the cylinder is fully mixed with distilled water to form...

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Abstract

The invention discloses a measuring method and device for mechanical strength of granular sludge. The measuring method comprises the following steps of: sieving the fine granular sludge to be measured through a sieving device, mixing 1L distilled water in the sieved granular sludge, ventilating for 1h, sieving and filtering the ventilated sludge-water mixture, and meanwhile, repeatedly performing the steps above on the residual granular sludge for 4-5 times; and sieving and filtering the granular sludge for the last time, and drying and weighing the residual granular sludge and other filtered sludge to obtain a wear rate coefficient. The measuring device comprises a cylinder, a micropore air distributing device, an air flow meter and an air compressor, wherein the micropore air distributing device is installed on the bottom of the cylinder; and the micropore air distributing device is communicated with the air compressor through the air flow meter. The measuring method and device disclosed by the invention have the beneficial effects that the measuring method is strong in maneuverability and measuring parameters are liable to regulate and control; the method and the device can be used for measuring various kinds of granular sludge, and the testing cost is low; the shear force applied to the granular sludge in the measuring device is uniform, and the mechanical strength of the granular sludge can be accurately measured.

Description

technical field [0001] The invention relates to a method for measuring the mechanical strength of granular sludge and a measuring device thereof. Background technique [0002] In the field of wastewater treatment, the formation of granular sludge in the reactor is conducive to the retention of microorganisms and enhances the ability to treat pollutants. However, the agitation and shear generated by the rising water flow and biogas bubbles in the reactor, as well as internal pressure fluctuations, may cause particle breakage, abrasion or peeling, etc., which is not conducive to the long-term maintenance of granular sludge and the stable operation of the reactor. Therefore, mechanical strength is an important physical property of granular sludge, and it is necessary to characterize it quantitatively. However, so far, devices and methods for measuring the mechanical strength of granular sludge are still lacking. In the published related patents, the measuring device and metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 金仁村邢保山陈伸星
Owner HANGZHOU NORMAL UNIVERSITY
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