Did three CBODs using dilutions of 50, 150, and 275mls. Used 15 mls polyseed and added TCMP. This on a final effluent. Dilution water was less than .20 depletion, and GGA was good Results were:
Is it normal for results to go from high to low like they do, or should they all be close together?
Also, if dilution water ihas a depletion of greater than .20 can the CBOd results still be valid?