Thank you Imre for your answer. I am very sorry because I have not given all the data. I will edit my post now. The COD is 5000-12000 mg/L. Yes I believe the sampling approach you suggested is very essential. But the company only gave me the data which I have mentioned all in my post.
Published by Hung Bui, Graduate Student. 1-year experience in water and wastewater sectors.
Thank you Imre for your answer. I am very sorry because I have not given all the data. I will edit my post now. The COD is 5000-12000 mg/L. Yes I believe the sampling approach you suggested is very essential. But the company only gave me the data which I have mentioned all in my post.