Optimization Of Nitrogen Removal By Treating Real Domestic Sewage Which Is Low C/N In A/O Process

摘要

By treating real domestic sewage which is low C/N in A/O process, results showed that different removal rates occurred under different organic loadings, internal reflux ratio (R) without external carbon source. It was demonstrated that with the improvement of organic loading, F/M improved from 0.22 kg/(kg MLSS·d) to 0.28 kg/(kg MLSS·d), removal rates of TN and COD were improved by 4.84% and 16.55% respectively. Because lower C/N, TN and COD removal had no obvious enhancement by elevating R from 150% to 250% with organic loading is 28 kg/(kg MLSS·d).