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Aerobic granular sludge enhanced start-up and stable operation method

An aerobic granular sludge, stable operation technology, applied in chemical instruments and methods, water/sludge/sewage treatment, special compound water treatment, etc., can solve the problem of easy instability of the granular structure and accelerate the granulation process , compact particle structure, enhanced denitrification and removal of refractory organic matter

Active Publication Date: 2018-09-18
HANGZHOU PUER ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0003] As a special microbial aggregate, aerobic granular sludge still has problems such as easy instability of the granular structure that still limit its technical application and promotion.

Method used

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  • Aerobic granular sludge enhanced start-up and stable operation method
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  • Aerobic granular sludge enhanced start-up and stable operation method

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Embodiment 1

[0025] In this case, the aerobic granular sludge process for treating urban sewage adopts a sequencing batch reactor (SBR) with an effective volume of 3.0L, such as figure 1 Shown: The main body of the reactor is a cylindrical plexiglass tube with a height of 50 cm and an inner diameter of 8.5 cm. The water inlet is located on the upper part of the reactor, and a submersible pump 6 pumps the urban sewage in the water inlet bucket 7 into the main body of the reactor. The aeration device consists of an air pump 1 connected to a rotameter 2 and a microporous aeration head, and the aeration head is placed at the bottom of the reactor cylinder. The water outlet system is pumped by a peristaltic pump 4 from the lower part of the reactor to the water outlet cylinder 5 . The reactor operation program is controlled by a set of programmable automatic time controller (PAC) 3 .

[0026] In this implementation case, the operation process of using the above-mentioned sequencing batch reac...

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Abstract

The invention discloses an intensified starting and stable operation method for aerobic granular sludge. A sequence batch reactor for aerobic granular sludge is adopted, and the reactor is operated for a process cycle including five procedures, namely, water feeding, standing, aeration, deposition and water discharge. The main body of the reactor adopts a height-diameter ratio of 4-8 and a water drainage ratio of 40-60%, and the operation cycle lasts for 4-6 hours; the water feeding time lasts for 5-10 minutes; the time for standing comprises 5-25 minutes of denitrification, 5-10 minutes of deposition, 3-5 hours of aeration and 3-10 minutes of water discharge; and in the starting stage, a specific water feeding mode is adopted, the water feeding load is 5kg of COD m<3> / d in the initial stage of inoculation, 0.5kg of COD m<3> / d can be reduced after 5 days of operation each time, and the fed water OLR can be reduced to 3.5kg of COD m<3> / d within 15 days. By adopting the method, aerobic granular sludge which is dense in structure, uniform in size and rich in functional flora can be formed, relatively rapid starting and long-term stable operation of the aerobic granular sludge reactor can be achieved, and the problems that a conventional aerobic granular sludge process technique is generally hard in granulation, likely to cause instability in the operation process, and the like can be solved.

Description

technical field [0001] The invention relates to an aerobic granular sludge operation control strategy for treating simulated urban sewage, and belongs to the technical field of wastewater biological treatment. Background technique [0002] Aerobic biological treatment is one of the core technologies and effective means for wastewater treatment and organic matter mineralization. Aerobic granular sludge was discovered in 1991, and scholars believe that it is a self-fixed form of microorganisms formed spontaneously under aerobic conditions. Aerobic granular sludge has a dense physical structure, excellent settling performance, functional interoperability of bacteria and high concentration of biomass. It has obvious technical advantages and good development and application prospects in terms of output and reduced processing costs. In 1997, Morgenroth et al. successfully cultivated a large amount of stable aerobic granular sludge (AGS) in a sequence batch reactor (Sequence Batc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCC02F3/12C02F3/1263C02F2203/004C02F2305/06Y02W10/10
Inventor 朱亮余海天项硕
Owner HANGZHOU PUER ENVIRONMENTAL TECH CO LTD
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