For the anaerobic digestion of the industrial wastewater described in Example 6.2, 10M ferric chloride (FeCl3) solution is used to remove H2S from the biogas produced in the digester. a. How much of...

For the anaerobic digestion of the industrial wastewater described in Example 6.2, 10M ferric chloride (FeCl3) solution is used to remove H2S from the biogas produced in the digester. a. How much of the ferric chloride solution needed per week? b. If there are also iron, copper, and zinc irons existing in the wastewater at the concentration of 80, 60, and 50mg/L, respectively, how much is the ferric chloride solution needed per week to remove the H2S from the biogas?