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Method for quickly granulating aerobic sludge

An aerobic sludge and granulation technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of long start-up time of aerobic granular sludge process, and achieve Efficient pollutant removal ability, excellent settling performance, and compact particle structure

Active Publication Date: 2017-07-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the aerobic granular sludge process has problems such as long start-up time

Method used

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  • Method for quickly granulating aerobic sludge
  • Method for quickly granulating aerobic sludge
  • Method for quickly granulating aerobic sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment is recorded as R2: the reactor is inoculated with a sludge concentration of 4000 mg L -1 , the initial COD load is 2kgCOD·m -3 d -1 start under the conditions. During the whole operation, the F / M of the system is always kept at 0.5-0.7kgCOD·kgMLSS -1 d -1 In the range of , the influent load varies with the sludge concentration.

Embodiment 2

[0023] This embodiment is recorded as R1: compared with this embodiment, the only difference is that the F / M of the system is always kept at 0.3-0.4kgCOD·kgMLSS during the whole operation process -1 d -1 within the range, the rest are consistent.

Embodiment 3

[0025] This embodiment is recorded as R3: compared with this embodiment, the only difference is that the F / M of the system is always kept at 0.8-0.9kgCOD·kgMLSS during the whole operation process -1 d -1 within the range, the rest are consistent.

[0026] The effects of Examples 1-3 are compared and described below.

[0027] 1. Sludge concentration

[0028] Such as figure 2 As shown, the sludge concentration in R1 is low, the sludge concentration in R2 is moderate, and the amount of residual sludge in R3 is large.

[0029] 2. Pollutant removal rate

[0030] Such as image 3 As shown, whether it is COD, NH 4 + - The removal rate of N or TN is the best for R2, COD, NH 4 + The average removal of -N was 97%, 99%, respectively.

[0031] 3. SVI ratio comparison

[0032] SVI 5 / SVI 30 The closer to 1 the graininess is better. From Figure 4 can be seen in. SVI in late R2 5 / SVI 30 close to 1.

[0033] 4. Granulation time and shape comparison

[0034] Figure 5 E...

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Abstract

The invention discloses a method for quickly granulating aerobic sludge and belongs to the technical field of wastewater treatment. According to the invention, a system F / M ratio is controlled for boosting the quick granulating of the aerobic granular sludge and forming the granule sludge with high settling velocity and abundant microbial community structure. The method disclosed by the invention can solve the problem of long forming time of the aerobic granular sludge.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for rapid granulation of aerobic sludge. Background technique [0002] In the early 1990s, researchers discovered aerobic granular sludge in an aerobic upflow reactor. Granular sludge formed by self-coagulation of functional flora. Compared with activated sludge, aerobic granular sludge has regular shape and compact structure, good settling performance, rich functional flora and high concentration of biomass, and has strong resistance to shock load and toxic substances. Resistance is a new technology with great potential for wastewater biological treatment. However, the aerobic granular sludge process has problems such as long start-up time. Therefore, in the present invention, the activated sludge can be quickly granulated by adjusting the organic load rate (F / M, also called sludge load), which has very important application value. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F3/1263C02F2209/005C02F2209/08Y02W10/10
Inventor 朱亮吴迪
Owner ZHEJIANG UNIV
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