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Method for determining activated sludge treatment capacity

A technology of activated sludge and treatment capacity, applied in water/sludge/sewage treatment, biological water/sewage treatment, water treatment parameter control, etc. Evaluation difficulties and other problems, to make up for the difficult evaluation of processing capacity and the effect of fast removal of pollutants

Active Publication Date: 2016-06-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

However, the actual sludge load of the sewage treatment system is often affected by factors such as influent water quality, sludge activity, hydraulic retention time, etc., which brings difficulties to the evaluation of the actual treatment capacity of the sewage treatment plant, so the actual sewage treatment plant generally Only when the effluent exceeds the standard, the operator will realize that the system is overloaded, but the system processing capacity and the risk of effluent exceeding the standard under normal conditions cannot be assessed

Method used

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  • Method for determining activated sludge treatment capacity
  • Method for determining activated sludge treatment capacity
  • Method for determining activated sludge treatment capacity

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Embodiment

[0058] Example analysis:

[0059] Take A sewage plant as an example. Figure 1(a) and Figure 1(b) are the experimental results of A sewage plant. t in Figure 1(a) exp It is 2520min, and the complete degradation time t of biodegradable pollutants is determined by the change characteristics of dSOUR / dt 2 (1263min) less than t exp , the residence time of biodegradable pollutants in the actual sewage treatment plant is sufficient. SOUR cap ×(1±0.25) The degradation critical time obtained is t 2sw1 =1080min,t 2sw2 = 2200 min. At this time, t 2sw1 2 2sw2 (Critical area), the effluent supernatant can be discharged up to the standard. However, the COD value of the actual sewage treatment plant effluent is 30mg / L, and the NH 3 -N value is about 1.0mg / L. Figure 1(b) is another experiment, at this time t 2 also at t 2sw1 2 2sw2 Within the range, but the corresponding sewage plant effluent water quality COD = 87.06mg / L, NH 3 -N=0.927mg / L, the COD of the effluent exceeds the n...

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Abstract

The invention discloses a method for determining activated sludge treatment capacity. The method comprises the steps that 1, respiration map analysis is conducted on activated sludge of an aeration tank of a sewage plant, and the oxygen uptake rate (OUR) value is determined; 2, the activated sludge of the aeration tank of the sewage plant is mixed with raw water for an aeration test; 3, the value of sludge concentration of the aeration tank of the sewage plant is tested, all the oxygen uptake rates (OUR) are divided by the sludge concentration MLSS, and the specific oxygen uptake rate (SOUR) is obtained; 4, an SOUR curve obtained through the aeration test is drawn, and two time points t1 and t2 are obtained according to derivative change characteristic points; 5, if t2 is in a defined safe area, effluent of a sludge treatment system can reach the standard safely. According to the method for determining the activated sludge treatment capacity, the activated sludge treatment capacity can be analyzed and determined according to an activated sludge respiration map and aeration test data. By means of the method, technical staff of the sewage plant can understand the treatment capacity of current activated sludge treatment, operating parameters are adjusted in time, and guiding suggestions are provided for reasonable operation, energy saving and consumption reduction of the sludge plant.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a method for judging the treatment capacity of activated sludge in a sewage plant by analyzing the respiration spectrum of activated sludge and measuring the aeration of sludge and raw water. Background technique [0002] The water quantity and water quality of sewage treatment plants are designed to be calculated and determined according to relevant data. However, the actual situation after the completion of the sewage treatment plant is different from the design results, and there are often great differences. In the design of sewage plants, sludge load or volume load is generally used to represent the treatment capacity of the system. The load range given in the design specification is wide, and different processes have different requirements, so the load of the sewage treatment plant is often determined according to the actual situation. However, the actual sludge load of the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00C02F3/12
CPCG01N33/00C02F3/12C02F2209/44Y02W10/10
Inventor 李志华吕建坤唐姚辉
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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