A method for determining and regulating the growth state of activated sludge

A growth state, activated sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problem that it is difficult to obtain logarithmic growth effect, sewage treatment plants are not widely used, limitations

Active Publication Date: 2018-04-10
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

[0006] The basic assumption of the above measurement process is that microorganisms enter the logarithmic growth period under the condition of sufficient substrate, but in the actual test, if there is insufficient experience, it is often difficult to obtain a good logarithmic growth effect, and repeated trial and error is required, which also leads to this On the one hand, it is limited to academic applications, and has not been widely used in the actual operation of sewage treatment plants because it is difficult to strictly control the required conditions

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  • A method for determining and regulating the growth state of activated sludge
  • A method for determining and regulating the growth state of activated sludge
  • A method for determining and regulating the growth state of activated sludge

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[0108] Example analysis:

[0109] Draw from the activated sludge growth state determination data in Table 2 and Table 3, and make In(OUR A )-time, In(OUR H )-time curve characteristic diagram, as shown in Figure 1(a)~(e), the activated sludge growth state is defined as logarithmic growth period and non-logarithmic growth period from Figure 1. Figure 1 The type of activated sludge growth state Figure 1(a) is the logarithmic growth period, and Figure 1(b), (c), (d), and (e) are the non-logarithmic growth period.

[0110] In the logarithmic growth phase, the substrate nutrient-rich microorganisms oxidized and converted organic matter into cell matter at the maximum rate, the sludge growth trend was good, and the biomass test accuracy was high. In the non-logarithmic growth period, the sludge growth is limited, and the biomass test results cannot be obtained or the test results have large errors.

[0111] It can be seen from Table 4 and Figure 2(a)-(c) that when the respiratory...

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Abstract

The invention discloses a judgment method and regulation and control method for the growth states of activated sludge. The judgment method includes the steps that the endogenous respiration rate OURe of the activated sludge is measured, a nitrogen containing solution or an autotrophic bacterium restraining solution and a carbon and nitrogen containing solution are added, the autotrophic bacterium respiration rate OURN and heterotrophic bacterium respiration rate OURC of the sludge are measured respectively, after the final autotrophic bacterium respiration rate OURA and the final heterotrophic bacterium respiration rate OURH are calculated, logarithms are taken respectively, an InOURA-time reciprocal diagram and an InOURH-time reciprocal diagram are drawn, and whether the growth states of two kinds of a logarithm increasing phase and a non-logarithm increasing phase are achieved or not is judged. The regulation and control method includes the steps that the quasi endogenous respiration rate OURme, the endogenous respiration rate OURe and the sludge nitrogen-added respiration rate OURN are measured respectively; a characteristic diagram is drawn, the growth state of autotrophic bacteria gets into the logarithm increasing phase by controlling alkalinity, and the growth state of heterotrophic bacteria gets into the logarithm increasing phase by increasing the volume of the sludge or the matrix adding quantity. The novel effective method is provided for judgment and regulation of the sludge growth situations of a sewage treatment plant.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to a method for judging and controlling the growth state of activated sludge. Background technique [0002] Activated sludge method is an important treatment method in sewage biological treatment. It is widely used because of its flexible operation mode, high work efficiency, low daily cost and little secondary pollution. However, the operation and management of the activated sludge process is more complicated, and there are many factors that affect the system's working efficiency, and the growth state of the activated sludge is one of them. If the activated sludge growth state is good, its growth trend is good, and its metabolism is fast, which is beneficial to improve the sewage treatment effect. The poor growth state of activated sludge will lead to sludge floating, sludge swelling and other conditions that are not conducive to the stable operation of sewage treatment plants. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12G01N33/00
CPCC02F3/12C02F2305/06G01N33/00Y02W10/10
Inventor 李志华刘焕刘宗余
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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