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Simple calculation of the amount of three carbon sources added

来源:环保工程师 阅读量:7296 2020-01-06 14:16:59 source: environmental engineer reading: 7296

Introduction: The carbon source constitutes the nutrient of the carbon frame in the carbohydrates of microbial cells, and provides the energy required for the growth and development of microorganisms. A type of nutrient that contains carbon and can be used by microbial growth and reproduction is collectively called a carbon source. In this paper, the simple calculation of carbon source dosing by ordinary activated sludge method, carbon source dosing of denitrification system and carbon source dosing system of phosphorus removal system are explained.
The carbon source constitutes the nutrient of the carbon frame in the carbohydrates of the microbial cells, and supplies the energy required for the growth and development of the microorganisms. A type of nutrient that contains carbon and can be used by microbial growth and reproduction is collectively called a carbon source.
The carbon source material is used by microorganisms to synthesize various metabolites through a series of chemical changes in the cell. The demand for carbon compounds by microorganisms is extremely extensive. According to the unavailability of carbon, the carbon source material can be an inorganic carbon source material and an organic carbon source material. Because the inorganic carbon source and aeration in the sewage will supplement the inorganic carbon source (CO2), it is not necessary to add an inorganic carbon source in actual production. The carbon source in wastewater treatment is an organic carbon source!
I. Simple calculation of carbon source dosing by ordinary activated sludge method
In the ordinary activated sludge process, the CNP ratio is 100: 5: 1. In actual wastewater treatment, TP is often excessive. Many chemical dephosphorization is required to meet the standard. Therefore, the carbon source calculated by TP is often large. To calculate the amount of carbon source added.
1. Simple calculation method of external carbon source input amount
The unified calculation formula is:

Need to calculate the amount of nitrogen removed

Calculation of carbon source difference between in and out water

2. Case calculation

Second, the simple calculation of carbon source dosing system
In the nitrification and denitrification system, due to the influence of internal reflux carrying DO, the amount of carbon source added in practice is very different from the theoretical value. It is often calculated in accordance with empirical formulas in operation. The empirical value of the CN ratio is generally controlled at 4 ~ 6. Many times, the intermediate value calculation is used or the dosage is adjusted by testing the water TN!
1. Simple calculation method of external carbon source input amount
The unified calculation formula is:

2. Case calculation:

Simple calculation of the amount of carbon source added in the phosphorus removal system
The energy produced by phosphate-releasing bacteria during the anaerobic phase is mainly used for absorbing low-molecular organic substrates as a basis for survival under anaerobic conditions. Therefore, whether the intake water contains enough organic matter is an important factor related to whether the polyphosphate bacteria can survive under anaerobic conditions. It is generally believed that the COD / TP in the feedwater must be greater than 15 in order to ensure that the polyphosphate bacteria have a sufficient substrate to obtain the desired phosphorus removal effect.
1. Simple calculation method of external carbon source input amount
The unified calculation formula is:

2. Case calculation:

Original title: Simple calculation of the amount of carbon source added!

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