| The research investigated the effect of varying the starch-rich, industrial wastewater content in mixtures with municipal wastewater feeds for anaerobic contact digesters. The next portion of study investigated the suitability of a fermented 1:1 (by volume) feed mixture effluent for denitrification with batch cultures.; Two identical, laboratory-scale, completely-mixed, anaerobic contact digesters were employed. Each had a volume of 3L and was operated at an HRT of 30 hours, an SRT of 10 days, and at ambient temperature of 21.5 ± 1.5°C. The industrial-to-municipal ratios tested were 1:3, 1:1, 3:1 and 100% industrial by volume.; The second phase of this study tested the suitability of 1:1 feed ratio fermented effluent for denitrification. It was hypothesized that the VFAs in the effluent would serve as an organic carbon source and enhance denitrification. This research was carried out in batch tests using 1,000 mL Erlenmeyer flasks seeded with prepared primary sludge. Nitrates were added in the form of 1M potassium nitrate solution. Tap water was added to standardize all flask volumes to 600 mL. The tests were conducted at ambient temperature (21 to 24°C). (Abstract shortened by UMI.)... |
