Method for rapidly culturing aerobic granular sludge

An aerobic granular sludge, rapid technology, applied in the direction of aerobic process treatment, aerobic and anaerobic process treatment, sustainable biological treatment, etc., can solve the problems of long start-up period and shorten the start-up period of aerobic granular sludge , to achieve the effect of shortening the incubation time

Active Publication Date: 2016-01-20
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention uses artificially simulated wastewater as the water source in the SBR reactor, adopts two different operating modes to obtain aerobic granular sludge respectively, greatly shortens the start-up period of aerobic granular sludge, and solves the problem of current aerobic granular sludge The problem of generally long start-up period of sludge reactor

Method used

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  • Method for rapidly culturing aerobic granular sludge
  • Method for rapidly culturing aerobic granular sludge
  • Method for rapidly culturing aerobic granular sludge

Examples

Experimental program
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Embodiment 1

[0020] A method for rapidly cultivating aerobic granular sludge includes the following steps:

[0021] (1) Preparation of influent water source

[0022] The influent water source is simulated artificial wastewater, which is formulated as follows: CH 3 COONa1536mg / L, NH 4 Cl458.4mg / L, KH 2 PO 4 52.8mg / L, CaCl 2 27.8mg / L, MgSO 4 ·7H 2 O102.5mg / L, FeCl 3 0.9mg / L, H 3 BO 3 0.15mg / L, CuSO 4 ·5H 2 O0.03mg / L, KI0.18mg / L, MnCl 2 ·4H 2 O0.06mg / L, Na 2 Mo 7 O 24 ·4H 2 O0.06mg / L, ZnSO 4 ·7H 2 O0.12mg / L, CoCl 2 ·6H 2 O0.15mg / L, EDTA10mg / L, pH7~8. The simulated artificial wastewater has COD=1200mg / L, TP concentration is 12mg / L, NH 4 + -N concentration is 120mg / L, C:N:P=100:10:1 (mass ratio).

[0023] (2) Sludge inoculation

[0024] The sludge cake taken from the dewatering workshop of the sewage treatment plant is screened and washed to remove impurities such as leaves and sand, and then exposed to simulated artificial wastewater for 1-2 days. A certain amount of the sludge after the exposure is a...

Embodiment 2

[0029] Take the mud cake from the dehydration workshop of a sewage treatment plant in Wuhan, and use the method in Example 1, respectively to operate and control in anaerobic / aerobic / anoxic (A / O / A) and one-stage aeration (O) modes. At room temperature, the aerobic granular sludge can be obtained in an SBR reactor operating in anaerobic / aerobic / anoxic mode for 4 days. The electron microscope picture (4×10 times) is as figure 1 As shown; the aerobic granular sludge can be obtained in 5 days in the SBR reactor operating in the one-stage aeration mode, and the electron microscope picture (4×10 times) is as figure 2 Shown. COD, TP, NH in SBR reactor operating in two modes 4 + -N effluent concentration changes such as image 3 Shown.

[0030] Figure 1-2 It shows that the aerobic granular sludge obtained by the present invention has a relatively regular shape, a typical spherical or ellipsoidal shape, a relatively neat edge and a compact structure. The aerobic granular sludge obtaine...

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Abstract

The invention discloses a method for rapidly culturing aerobic granular sludge, belonging to the technical field of environment protection. According to the method, a hydraulic shearing force is enhanced by virtue of a cylindrical sequencing batch reactor (SBR), sludge is inoculated at the room temperature, manual simulation wastewater is taken as a water inlet source, and therefore, aerobic granular sludge is rapidly obtained; granular sludge can be obtained in the fourth day by virtue of the SBR working in an anaerobic / aerobic / anoxic (A / O / A) manner when high water inlet load, strong aeration condition and short settling time are maintained, and aerobic granular sludge is obtained in the fifth day by virtue of the SBR working in a one-segment pure aeration (O) manner. According to the method, the starting period of the aerobic granular sludge is greatly shortened, and the problem that the starting periods of current aerobic granular sludge reactors are generally long is solved.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method for rapidly cultivating aerobic granular sludge. Background technique [0002] Sewage biological treatment technology has become an important part of the water treatment field due to its low cost and low secondary pollution, and has important engineering application value. Among them, aerobic granular sludge has the advantages of compact structure, good sedimentation performance, high biological density, various biological species, high sludge activity and strong impact load resistance, which opens up new ways for biological treatment of sewage. [0003] It has proved feasible to obtain aerobic granular sludge in a sequencing batch reactor (SBR) through the action of hydraulic shear force. However, due to the many influencing factors, there is a problem that the startup period of aerobic granular sludge reactors is generally too long (generally from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/02
CPCY02W10/10
Inventor 王弘宇何秋来
Owner WUHAN UNIV
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