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A Method of Selecting Regulatory Measures for Sewage Treatment Process

A technology of sewage treatment and measures, which is applied in the direction of water treatment parameter control, biological water/sewage treatment, water/sludge/sewage treatment, etc. Quantity and other issues, to achieve the effects of compensating for hysteresis, less additives, and simple operation

Active Publication Date: 2020-08-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

However, improperly prolonged sludge residence time not only deteriorates the operating environment of the sedimentation tank, but also leads to insufficient oxygen supply due to the large increase in biomass

Method used

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  • A Method of Selecting Regulatory Measures for Sewage Treatment Process
  • A Method of Selecting Regulatory Measures for Sewage Treatment Process
  • A Method of Selecting Regulatory Measures for Sewage Treatment Process

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Experimental program
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Embodiment

[0045] Example analysis:

[0046] On-site respiration rate was obtained after monitoring the respiration pattern of the obtained sludge in the sludge system operated at different temperatures and standard respiration rate and put the Arrhenius equation After the correction coefficient θ of the critical temperature is set to 8°C, it is substituted into the on-site respiration rate Calculated predicted value of standard respiration rate The temperature distribution of the sewage treatment system during sampling is shown in Table 1, and the corresponding changes in the respiration rate are shown in the attached figure.

[0047] Table 1

[0048]

[0049] Such as figure 1 As shown, although the temperature gradually decreases, the P3 and P4 stage However, it is higher than the P1 or P2 stage, so after the low temperature returns to the standard temperature of 20°C, the sludge’s ability to remove pollutants will also increase. At the end of the P3 stage, Significan...

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Abstract

The invention discloses a method for selecting a control measure for a sewage treatment process. The method comprises the following steps: (1) performing a respiratory pattern test on activated sludgeat an on-site temperature and a standard temperature (20 DEG C), and respectively obtaining an on-site respiration rate and a standard respiration rate; (2) calculating to obtain a predicted value ofthe on-site respiration rate at 20 DEG C; (3) calculating a value which is difference value of the standard respiration rate and the predicted value, when the value is negative, preferentially choosing the control measure for prolonging the hydraulic retention time HRT at low temperature, and when the value is positive, increasing the oxygen concentration or MLSS (mixed liquor suspended solids) to enhance biological activity. By adopting the method, the control measure can be selected according to an oxygen consumption rate, changes in a sludge system can be found efficiently and conveniently, and a feasible method can be provided for the optimization, smooth operation, energy saving and consumption reduction and the like of a sewage treatment plant.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a method of measuring the actual respiration rate value of sludge, calculating and predicting the respiration rate value, and analyzing the value, so as to select a control measure suitable for a sewage treatment plant. Background technique [0002] Temperature is an important factor affecting the activity and microbial biomass of activated sludge, and many previous studies have also shown that its influence on nitrification is particularly important. When the sewage treatment plant operates under low temperature and seasonal changes, the sludge in the system deteriorates. For example, from autumn to winter, the sewage treatment plant encounters cold shock and the activated sludge system deteriorates, resulting in fluctuations in the concentration of the effluent happens from time to time. However, due to the long enough hydraulic retention time and other reasons, the concentration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCC02F3/12C02F2209/02C02F2301/10Y02W10/10
Inventor 李志华张亚立张倩高淼李姝凝
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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