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A method of inhibiting activated sludge bulking

A technology for sludge bulking and inhibiting activity, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. problems, to achieve the effect of improving compaction, simple and easy operation, and improving settling performance

Active Publication Date: 2018-07-17
SINOMINE ROCK & MINERAL ANALYSIS TIANJIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention: In view of the deterioration of the settling performance of the current activated sludge, the SVI value and SV value are constantly increasing, and the MLSS concentration in the aeration tank is constantly decreasing, which leads to the loosening of sludge particle flocs, resulting in sludge loss and turbidity in the effluent In order to avoid the disadvantages, it provides a method of using pure natural plant extracts to add copper sulfate, magnesium chloride and sodium chloride to inhibit the growth of bacteria, and then through aeration treatment to improve the compaction of the sludge and improve the sedimentation performance of the sludge. , thereby inhibiting the method of activated sludge bulking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024]First pick 800g of fresh bell flowers, wash them with clean water, remove the surface dirt, put them in a pulverizer and grind them into 100 mesh particles, then put the obtained particles in a fermentation tank, and control the fermentation temperature to 38°C , after 2 days of fermentation, move it into a centrifuge, centrifuge at a speed of 1200r / min for 10min, take the supernatant, which is the phytoacid of bellflower; then take 500g of fresh begonias and 400g of nettle leaves, and manually remove the old stems , dry leaves, put them in clean water and wash them repeatedly once, then put the washed begonia and nettle leaves in boiling water at a temperature of 65°C to blanch, take them out immediately after 5 seconds, put them into a grinder, and crush them into a size of 1.2×1.3cm or less fragments; then pour the above crushed fragments into an 800mL ethyl acetate beaker with a mass concentration of 25%, mix and stir evenly, soak for 3 hours, and after soaking, put t...

example 2

[0027] First pick 1000g of fresh bell flowers, wash them with clean water, remove the surface dirt, put them in a pulverizer and grind them into 110 mesh particles, then put the obtained particles in a fermentation tank, and control the fermentation temperature to 50°C , after 3 days of fermentation, move it into a centrifuge, centrifuge at a speed of 1300r / min for 13min, take the supernatant, which is the phytoacid of bellflower; then take 700g of fresh begonias and 500g of nettle leaves, and manually remove the old stems , dry leaves, washed twice in clean water repeatedly, and then put the washed begonia and nettle leaves in boiling water at a temperature of 75°C for blanching, take them out immediately after 7 seconds, move them into a grinder, and crush them into sizes of 1.2 × 1.3cm below the fragments; then pour the above crushed fragments into a 1000mL ethyl acetate beaker with a mass concentration of 25%, mix and stir evenly, soak for 4h, and after soaking, put the soa...

example 3

[0030] First pick 1200g of fresh bell flowers, wash them with clean water, remove the surface dirt, put them in a pulverizer and grind them into 120 mesh particles, then put the obtained particles in a fermentation tank, and control the fermentation temperature to 55°C , after 4 days of fermentation, move it into a centrifuge, centrifuge at a speed of 1500r / min for 15min, take the supernatant, which is the phytoacid of bellflower; then take 800g of fresh begonias and 600g of nettle leaves, and manually remove the old stems , dry leaves, put them in clean water and wash them repeatedly 3 times, then put the washed begonias and nettle leaves in boiling water at a temperature of 85°C for blanching, take them out immediately after 8 seconds, move them into a grinder, and crush them into sizes of 1.2 × 1.3cm below the fragments; then pour the above crushed fragments into a 1300mL ethyl acetate beaker with a mass concentration of 25%, mix and stir evenly, soak for 5h, after soaking, ...

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Abstract

The invention discloses a method for inhibiting activated sludge bulking and belongs to the technical field of sludge preparation. A purely natural plant extract solution added with copper sulfate, magnesium chloride and sodium chloride is adopted to inhibit bacterium growth, then aeration treatment is performed, the compactness of sludge is increased, and the settling property of the sludge is improved, so that the method for inhibiting activated sludge bulking is obtained. Examples prove that the method is simple to operate and easy to implement, the settling property is improved, growth of bacteria is effectively inhibited, so that sludge particles are hardened and cannot lose easily, the finally measured SVI (sludge volume index) is decreased from original 120-150 mL / g to 80-100 mL / g, SV is dropped from 50%-55% to 10%-12%, and bulking disappears gradually.

Description

technical field [0001] The invention discloses a method for inhibiting the expansion of activated sludge, which belongs to the technical field of sludge preparation. Background technique [0002] Due to some reason, the settling performance of activated sludge deteriorates, the SVI value continues to increase, and the sludge surface of the sedimentation tank continues to rise, resulting in sludge loss, a decrease in the concentration of MLSS in the aeration tank, and finally destroying the normal operation of the treatment process. Sludge bulking. [0003] Activated sludge bulking is one of the biggest problems that have plagued people in the operation management and control since the advent of activated sludge, so it is called "the cancer of activated sludge process". The bulking of activated sludge can be divided into two types: one is the bulking of filamentous sludge caused by the proliferation of filamentous bacteria in the activated sludge; Non-filamentous bacteria s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCC02F3/12C02F2103/343C02F2305/00Y02W10/10
Inventor 汪伶俐王啸于丽丽郇庆增吴兵胡琳珊于大澍辜汉华屈武林候立叶
Owner SINOMINE ROCK & MINERAL ANALYSIS TIANJIN CO LTD
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