Device for rapidly granulating aerobic sludge and method thereof

An aerobic sludge and granulation technology, which is applied in chemical instruments and methods, biological treatment devices, water/sludge/sewage treatment, etc., can solve the problem of long granulation cycle, easy instability of granules, and restrictions on the wide application of modified processes and other problems, to achieve the effect of compact particle structure, speed up the process of sludge cultivation and enrichment, and overcome the long time of sludge granulation

Inactive Publication Date: 2017-11-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, the aerobic granular sludge process generally has the problems of long granulation cycle under low-load influent conditions, and long-term operation of the granules is prone to instability, which restricts the wide application of the improved process worldwide.

Method used

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  • Device for rapidly granulating aerobic sludge and method thereof
  • Device for rapidly granulating aerobic sludge and method thereof
  • Device for rapidly granulating aerobic sludge and method thereof

Examples

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Embodiment 1

[0035] In this example, a cylindrical sequencing batch reactor (SBR) with an effective volume of 3.5 L is used in the aerobic granular sludge process for treating urban sewage. The main body of the reactor is a cylindrical plexiglass cylinder with a height of 55 cm and an inner diameter of 9 cm. Its structure is as figure 1 and 2 As shown in the foregoing description, no further details are given.

[0036] In this example, the inoculated sludge was taken from the aeration tank of the municipal sewage treatment plant, and the Shannon index was 4.79, which means that there is a relatively high abundance of flora in the particles. The analysis of the flora structure at the phylum level found that Proteobacteria and Bacteroides Gates accounted for more than 65%, and these bacteria are important flora in aerobic granular sludge, which can help the device to achieve rapid granulation of aerobic granular sludge. The influent matrix is ​​urban domestic sewage.

[0037] The operati...

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Abstract

The invention discloses a device for rapidly granulating aerobic sludge and a method thereof and belongs to the technical field of wastewater biological treatment. The device comprises a water inlet unit, a reactor main body, an aeration unit, a water outlet unit and a control unit, wherein the water inlet unit comprises a matrix inlet bucket, a clear water inlet bucket and a matrix regulation tank, a reactor organic load regulates volume control of matrix entering into water by virtue of a liquid level sensor located at the bottom of the matrix regulation tank, and organic load change is determined by virtue of a water quality sensor in a water outlet bucket. The device disclosed by the invention can realize automatic control of the reactor organic load and guarantees that the reactor organic load is decreased progressively in gradient, so that aerobic granular sludge with larger granule diameter, higher settling velocity, stable structure and abundant bacterial groups is formed, and the ubiquitous problems in the prior art that a granulation period is long, sludge can be easily bulked in an operational process and long-term system operation is unstable are solved.

Description

technical field [0001] The invention relates to a device and a method for rapidly granulating aerobic sludge, belonging to the technical field of wastewater biological treatment. Background technique [0002] Aerobic granular sludge technology has the characteristics of high operational pollution load, good sludge settling performance, strong impact resistance, and less land occupation of treatment equipment. It has obvious application advantages in the fields of industrial wastewater and urban domestic sewage treatment. At present, scholars at home and abroad have carried out a lot of research on the physical and chemical structure characteristics of aerobic granular sludge, microbial ecology, mass transfer model and formation mechanism, and have established a number of pilot tests and demonstration projects at home and abroad, among which Delft University of Technology in the Netherlands learn to use The process has established more than 30 sewage aerobic granular sludge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/1263C02F2203/006Y02W10/10Y02W10/37
Inventor 张智明马柯朱亮徐向阳
Owner ZHEJIANG UNIV
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