the COD of inflow is about 1,000 ppm, the wastewater deal by settling tank ,activated sludge tank(MBBR/first and second aerotion tank) ,DAF and sand filter, the COD of effluents is below 100 ppm,the process for COD remove is all right;the NH3-N of inflow is about 20~30 ppm,the NH3-N reduction rate deal by aerotion tank is not stable, and the NO2-N and NO3-N generate in the aerotion tank is not normal. I guess the DO may be a factor, but I do not know why we lower the DO in the second aerotion tank, and the NO2-N is decreased and NO3-N is increased.
Published by Lin JYH-YAN, advanced engineer at FORMOSA PETROCHEMICAL CORPORATION
the COD of inflow is about 1,000 ppm, the wastewater deal by settling tank ,activated sludge tank(MBBR/first and second aerotion tank) ,DAF and sand filter, the COD of effluents is below 100 ppm,the process for COD remove is all right;the NH3-N of inflow is about 20~30 ppm,the NH3-N reduction rate deal by aerotion tank is not stable, and the NO2-N and NO3-N generate in the aerotion tank is not normal. I guess the DO may be a factor, but I do not know why we lower the DO in the second aerotion tank, and the NO2-N is decreased and NO3-N is increased.
1 Comment
Most commonly BOD / COD are measured and calculated on carbonaceous bases, and few ones on nitrogen which is more reactive
Published by Arturo Constante, Wastewater Purification - Zero Emissions