Culture method and culture method for aerobic granular sludge

A technology of aerobic granular sludge and cultivation method, which is applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc. Poor stability and other problems, to achieve the effect of synchronous removal

Inactive Publication Date: 2018-05-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still problems of long start-up time and poor long-term operation stability, which largely restrict the popularization and use of this technology.

Method used

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  • Culture method and culture method for aerobic granular sludge
  • Culture method and culture method for aerobic granular sludge
  • Culture method and culture method for aerobic granular sludge

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Example 1: Exploration of adding inert substrate PAC / sepiolite to aerobic granular sludge cultivation

[0060] The invention utilizes PAC as an inert substrate to quickly cultivate aerobic granular sludge. In this embodiment, the control group is set as an RC reactor without adding an inert substrate, an RP reactor with PAC added, and an RPS reactor for PAC / sepiolite combination, and the rest of the operating conditions are the same to construct a device described in the invention. The reactor 13 in the device has an inner diameter of 12 cm, an effective volume of 2 L, a ratio of height to diameter of 2:1, and a volume exchange rate of 50%. The feed water of the reactor adopts artificial synthetic wastewater to simulate domestic sewage, and the specific components are: CH 3 COONa, 513mg·L -1 , the organic load is 1.0kgCOD / (m 3 d); NH 4 Cl, 153 mg L -1 ;KH 2 PO 4 , 40.6mg·L -1 ;K 2 HPO 4 , 46.3mg·L -1 Na 2 EDTA, 38.2mg·L -1 ;CaCl 2 , 100mg·L -1 ;MgSO 4 2H...

Embodiment 2

[0086] Example 2, the enhanced biological phosphorus and nitrogen removal of the aerobic granular sludge cultivated by PAC / sepiolite combination.

[0087] According to the synthetic wastewater formula in Example 1 as the reactor feed water, the SBR reactor adopts the anaerobic-aerobic alternate operation mode in Example 1 during the process of cultivating granular sludge, and runs for 4.8 hours per cycle, 5 a day and night The cycle includes 1 minute of water inflow, 99 minutes of anaerobic, 160 minutes of aerobic, initial sedimentation time of 20 minutes, 1 minute of water outlet, 7 minutes of idle time, a total of 6 stages, each stage can be regulated by a time controller.

[0088] like Figure 9a , Figure 9b , during the sludge cultivation process, the three reactors for TP and PO 4 3- The removal rate of -P is basically about 99%, and the effluent index is better than the first-class A standard of "Pollutant Discharge Standards for Urban Sewage Treatment Plants". In t...

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Abstract

The invention relates to a culture method and a culture device for aerobic granular sludge. The culture method for the aerobic granular sludge particularly comprises the following steps of inoculatingactive sludge in a reactor, adding PAC (Polyaluminum Chloride) and sepiolite, and mixing the active sludge; pumping artificial synthetic wastewater into the reactor by utilizing a water intake device, and culturing the aerobic granular sludge through an SBR (Sequencing Batch Reactor) treatment process. The culture device is used for solving problems that the start time is long, the running is unstable, the impact load resisting ability is weak and sludge is easily disintegrated, and the like, in a culture procedure of the aerobic granular sludge, can be used for enhancing biological phosphorus removal, and has advantages of synchronous denitrogenation and phosphorus removal function, stable running, wide raw material source, simple operation and the like.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to an aerobic granular sludge cultivation method and a cultivation device thereof. Background technique [0002] The traditional biological treatment process can be divided into activated sludge method and biofilm method. Activated sludge process has a variety of operating processes, common such as A N / O,A P / O,A 2 / O and SBR etc. These processes use different combinations of aerobic, anoxic and anaerobic zones to remove nitrogen and phosphorus from water. However, the activated sludge method generally has the disadvantages of easy expansion of sludge, weak resistance to impact load and large volume of reaction tank. Compared with the activated sludge method, the microorganisms in the biofilm method adhere to the surface of the filler and grow, which has strong adsorption performance and rich biological species. More types of microorganisms and longer biol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/30
CPCC02F3/1205C02F3/121C02F3/1215C02F3/1263C02F3/301Y02W10/10
Inventor 陈晓国陈俊男犹娟覃练陶佳刘小英
Owner WUHAN UNIV OF TECH
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