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Method for preparing granular sludge added with Mn2+

A technology of granular sludge and activated sludge, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve problems such as low efficiency and short preparation cycle, and achieve high efficiency, short-term effect

Inactive Publication Date: 2012-01-25
SHANDONG ACAD OF ENVIRONMENTAL SCI
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  • Abstract
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Problems solved by technology

[0003] Aiming at the problems of low efficiency in the existing granular sludge preparation technology, the present invention provides a Mn-addition compound with short preparation period and enhanced performance of granular sludge. 2+ The preparation method of granular sludge

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  • Method for preparing granular sludge added with Mn2+
  • Method for preparing granular sludge added with Mn2+

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Embodiment Construction

[0010] The addition of Mn in the present invention 2+ The preparation method of granular sludge is prepared by using a cylindrical SBR reactor. The activated sludge from the sewage treatment plant (the MLSS value of the activated sludge is 2g / L-2.5g / L, the MLVSS value is 1.5g / L-1.9g / L, and the SVI value is 92mg / L-96 mg / L mg / L at room temperature (25 o C--28 o C) Culture. Using tap water as a solvent to add glucose and trace elements to prepare a nutrition accelerator, the specific composition and content of glucose and trace elements are: MnCl 2 .H 2 O (7.86~52.36) mg / L, C 6 h 12 o 6 700 mg / L, NH 4 Cl 125 mg / L, K 2 HPO 4 42 mg / L, CaCl 2 4.5 mg / L, H 3 BO 3 50mg / L, NiCl 2 ·6H 2 O 50mg / L, (NH 4 ) 6 Mo 7 o 24 4H 2 O 120mg / L, CuSO 4 ·5H 2 O 30mg / L, CoCl 2 ·6H 2 O 70mg / L, AlCl 3 50mg / L, ZnSO 4 ·7H 2 O 50mg / L and MgSO 4 ·7H 2 O 10mg / L. When the cylindrical SBR reactor is in operation, the nutrient accelerator and aeration air enter from the bottom...

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Abstract

The invention provides a method for preparing granular sludge added with Mn+2, which comprises the following processes of: (1) placing cultivated activated sludge in a SBR (butadiene styrene rubber) reactor, filling a nutrition improver premix and aerated air from the bottom of the SBR reactor, and operating the SBR reactor for six days, wherein in each operation period, the water inlet time is 5minutes, the sedimentation time is 10 minutes, the aeration time is 220 minutes and the water outlet time is 5 minutes; (2) from the seventh day, prolonging the aeration time in each operation periodto 224 minutes from 220 minutes, setting both the water inlet time and the water outlet time as five minutes and setting the sedimentation time as 6 minutes; and (3) controlling the phase so that thesedimentation time is 3 minutes, the aeration time is 227 minutes and both the water inlet time and the water outlet time are 5 minutes, and forming round or oval particles. The granular sludge has short forming time and high efficiency. The formed granular sludge has good properties on the aspects of the sedimentation rate, the hydrophobicity, the specific gravity, the particle strength, the EPS(Expanded Poly Styrol) content and biodiversity of the particles.

Description

technical field [0001] The invention relates to a method for preparing granular sludge used for wastewater treatment, and belongs to the field of granular sludge. Background technique [0002] Granular sludge has been widely used in wastewater treatment. Compared with the traditional activated sludge system, the granular sludge prepared by aerobic sludge granulation technology has the advantages of higher efficiency, better settling performance, and richer biodiversity. However, the traditional aerobic sludge granulation requires strict reaction conditions, the formation period of granular sludge is long and the granulation is unstable. Contents of the invention [0003] Aiming at the problems of low efficiency in the existing granular sludge preparation technology, the present invention provides a Mn-addition compound with short preparation period and enhanced performance of granular sludge. 2+ The preparation method of granular sludge. [0004] The addition of Mn in t...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 康兴生马涛苏强金立建张芙蓉李清印杨华董文平
Owner SHANDONG ACAD OF ENVIRONMENTAL SCI
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