Random process predicting method for outlet water organic substance concentration of municipal sewage treatment plant

A technology for urban sewage and prediction methods, which is applied in the fields of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of no substantial breakthroughs, etc., and achieves less measured parameters and easy operation. Feasible, good fit

Inactive Publication Date: 2011-09-07
CHONGQING ZHONGKE CONSTR GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of model has not yet achieved a substantial breakthrough in the world, and has not been reported in China.

Method used

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  • Random process predicting method for outlet water organic substance concentration of municipal sewage treatment plant
  • Random process predicting method for outlet water organic substance concentration of municipal sewage treatment plant
  • Random process predicting method for outlet water organic substance concentration of municipal sewage treatment plant

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Experimental program
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Effect test

Embodiment

[0061] According to the actual operation data of a city sewage treatment plant for 48 months from 2004 to 2008, the concentration of organic matter in its effluent was simulated by using the method of the present invention through Matlab.

[0062] Model parameter value: Y H =0.65mg MLVSS / mg BOD 5 , μ H = 3.5d -1 , K S =150mg / L, HRT=8h, X V =2000mg / L, S 0 (0)=125mg / L, S(0)=9mg / L, σ S(t) =40mg / L, α=75, β=375. The concentration of organic matter is expressed as BOD 5 is an indicator, the time is in days, and dt=1 / 1000.

[0063] The above parameter values ​​according to S ( t ) = e - α ( t - t 0 ) S ( t 0 ) + β α...

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Abstract

The invention discloses a random process predicting method for outlet water organic substance concentration of a municipal sewage treatment plant, which comprises the following steps of: by using an outlet water organic substance of the sewage treatment plant as a research object, establishing a mass conservation differential equation of inlet and outlet water organic substances, introducing a random process and deducing to obtain a predicted result of the outlet water organic substance concentration of the municipal sewage treatment plant. The invention needs to measure the yield coefficient, the maximum ratio growth rate and the saturation constant of heterotrophic bacteria and can predict the dynamic change process of the outlet water organic substance concentration when the water quality, the water quantity and the like of actual inlet water are fluctuated by simultaneously utilizing the aeration tank mixed liquid volatile suspended solid concentration of the sewage treatment plant, the hydraulic detention time, the actual inlet and outlet water total BOD5 (Biochemical Oxygen Demand) and the daily measured data. The novel activated sludge dynamic model method of the invention has the advantages of simple and feasible operation, fewer measured parameters, better fitting of a predicted value and a measured value and the like.

Description

technical field [0001] The invention relates to the field of sewage biological treatment, in particular to a random process prediction method for the concentration of organic matter in the effluent of urban sewage treatment plants. Background technique [0002] In the municipal sewage treatment process, the activated sludge system dominates. There are two main types of organic matter concentration models in urban sewage treatment plants (Wastewater Treatment Plant, WWTP): static models and dynamic models. In the 1950s and 1960s, some foreign scholars introduced the reactor theory and microbial theory in the chemical industry, and established their own classical activated sludge process mathematical models through the relationship between matrix degradation, microbial growth and various parameters, among which the most representative The most notable are the Eckenfedlder, Lawrence-McCarty and Mckinney activated sludge kinetic models, all of which are based on the Monod equat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12G06F17/15
CPCY02A20/152Y02W10/10
Inventor 许劲涂茂张海霞谈涛齐龙高溢璟洪国强赵绪光
Owner CHONGQING ZHONGKE CONSTR GROUP
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