The microorganisms in the activated sludge in the sewage plant can survive, grow and reproduce by swallowing a large amount of organic pollutants in the sewage. To put it figuratively, microorganisms 'eat' the organic matter in the sewage, so that the sewage becomes clean water. The nutrients needed by the microorganisms in sewage treatment are carbon sources.
Currently on the market There are three widely used carbon sources, liquid sodium acetate, liquid glucose, and IDN-N new composite carbon source.
Liquid sodium acetate: COD equivalent is about 200,000 (the effective amount of sodium acetate is 25). , crystallization will occur if the content continues to increase.
Liquid glucose: mainly food grade, with a COD equivalent of about 600,000 (effective monosaccharide content of more than 85)
IDN-N new composite carbon source: COD equivalent is between 200,000 and 1 million, compounded with small molecular alcohols, acids, and sugars.
Three types of carbon sources have their own advantages and disadvantages. :
Denitrification rate: new composite carbon source ≥ sodium acetate > liquid glucose
Sludge output: liquid glucose ≥ sodium acetate > new composite carbon source
Cost-effectiveness: New composite carbon source>Liquid glucose>Sodium acetate
New composite carbon source IDN-N composite carbon source is more conducive to microbial growth and denitrification than traditional carbon sources, and promotes denitrification. The bacterial colonies multiply rapidly, greatly improving the total nitrogen removal efficiency.