A food processing wastewater has a daily average flow rate of 100 m3 /day and 40,000mg/L COD. An equivalent formula of the organic compounds in the wastewater can be expressed as C10H19O3N2. The...

A food processing wastewater has a daily average flow rate of 100 m3 /day and 40,000mg/L COD. An equivalent formula of the organic compounds in the wastewater can be expressed as C10H19O3N2. The wastewater is utilized for biogas production in a suspended-growth anaerobic digester at 35°C with a HRT of 25days and the conversion efficiency is 95%. a. What is the ammonium concentration in the mixed liquor of the digester? b. Propose a method to remove ammonium from the mixed liquor to avoid inhibition and quantify the dosage of any reagents