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Fast culture process in anaerobic grain sludge

An anaerobic granular sludge and culture method technology, applied in the field of rapid cultivation of anaerobic granular sludge, can solve the problems of fast substrate degradation, low reaction rate, slow cell proliferation, etc., achieve shortened start-up time, increase production Effect of methane activity and accelerated accumulation

Inactive Publication Date: 2007-01-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for quick growth of aerobeads that are resistant against decomposing organisms such as nitrogen compounds or sulfur dioxide gases during their first stages of production. It achieves this by adding certain substances like polydimytose (PD) chlorides instead of monomers from trimellitol oil. By controlling these ingredients, the resulting agglomerations have low porosity, allowing them to be retained within each other without losing any valuable material produced therein. Additionally, PD chlorine helps improve the efficiency at producing biofibre products due to its ability to attach itself onto metal oxidized surfaces while still maintaining stability when exposed to air containing NO2 gas.

Problems solved by technology

This patented technical solution describes how to improve the efficiency of treatments involving anoxybial (anaerobically) oxidative reactions. These processes involve forming tiny grains containing catalysts like iron sulfide, copper vanadylselulfonate, manganese dioxysporphyrin, etc., which help break down carboxymers during startup phases. By controllably increasing the number density of these smaller sided gravel particles, they enhance the flow velocity of liquid throughput and allow faster speeds when starting up the rector. Additionally, the addition of polymer helps prevent aggregates within the receptor vessel and improves the stability of the anode material. Overall, this approach allows for efficient and effective treatment options without requiring excessive equipment resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] Inoculation sludge Use urban sewage treatment plant to digest sludge.

[0028] Dosing of polyquaternium salts Polyquaternium salts are used as sludge granulation accelerators, and polyquaternium salts are added to the reactor once every two days after the anaerobic reactor is started. The dosage of polyquaternium is estimated by the amount of sludge inoculum, and the mass ratio of the two is: polyquaternium / sludge amount=1.6mg / g.

[0029] The medium uses carbohydrate waste water as the medium.

[0030] Control the organic loading rate. The initial OLR adopts 0.5gCOD / (L·d), and the time interval for increasing the OLR is determined on the premise that the COD removal rate is 85%, so that the OLR can be increased rapidly.

[0031] Stirring method and intensity Pneumatic intermittent stirring is adopted, the stirring frequency is 5min / interval 1h, and the stirring intensity is the square root of the velocity gradient, and the G value is 85s -1 .

[0032] Reactor configu...

Embodiment approach 2

[0035] Inoculation sludge Use urban sewage treatment plant to digest sludge.

[0036] Dosing of polyquaternium salts Polyquaternium salts are used as sludge granulation accelerators, and polyquaternium salts are added to the reactor once every two days after the anaerobic reactor is started. The dosage of polyquaternium salt is estimated by the amount of sludge inoculum, and the mass ratio of the two is: polyquaternium salt / sludge amount=3.2mg / g.

[0037] Medium: Carbohydrate wastewater is used as the medium.

[0038] Control the organic loading rate. The initial OLR adopts 0.5gCOD / (L·d), and the time interval for increasing the OLR is determined on the premise that the COD removal rate is 85%, so that the OLR can be increased rapidly.

[0039] Stirring method and intensity The mechanical stirring method is adopted, and the stirring intensity is the square root of the velocity gradient, and the G value is 85s -1 .

[0040] Reactor Configuration The reactor height and diamet...

Embodiment approach 3

[0043] Inoculation sludge Use urban sewage treatment plant to digest sludge.

[0044] Dosing of polyquaternium salts Polyquaternium salts are used as sludge granulation accelerators, and polyquaternium salts are added to the reactor once every two days after the anaerobic reactor is started. The dosage of polyquaternium salt is estimated by the amount of sludge inoculum, and the mass ratio of the two is: polyquaternium salt / sludge amount=2mg / g.

[0045] Medium Carbohydrate wastewater was used as the medium.

[0046] Control the organic loading rate. The initial OLR adopts 0.5gCOD / (L·d), and the time interval for increasing the OLR is determined on the premise that the COD removal rate is 85%, so that the OLR can be increased rapidly.

[0047] Stirring method and intensity The hydraulic stirring method is adopted, and the stirring intensity is the square root of the velocity gradient, and the G value is 85s. -1 .

[0048] Reactor configuration Reactor height and diameter rat...

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PUM

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Abstract

The fast culture process of anaerobic granular sludge belongs to the field of bitanical waste water treating technology, and features that polyquaternary ammonium salt is thrown to reinforce the immobilization of anaerobes to form granular sludge fast. Throwing polyquaternary ammonium salt can reserve methane sarcina to speed the accumulation of methane sarcina, raise the methane producing activity of biological grain and shorten the granulating process. The present invention makes it possible to shorten the starting time of anaerobic reactor to 1-3 months. The polyquaternary ammonium salt as flocculant hard to biodegrade may be absorbed by microbes to form granular sludge with high active component content. The positively charged polyquaternary ammonium salt may be absorbed and adsorbed by negatively charged bacteria to create great amount of biological aggregate capable of strengthening the biological floc, so as to form compact granular sludge with excellent depositing performance.

Description

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Claims

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Application Information

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Owner TAIYUAN UNIV OF TECH
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