MEMBRANE BIOREACTORS AND CONSTRUCTED WETLANDS FOR TREATMENT OF RENDERING PLANT WASTEWATER |
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| Authors: | Catherine A O'Brien Dipl-Ing BEng MSc Miklas Scholz canding BEng PgC MSc PhD ILTM CScl CEnv CEng MIEMA MCIWEM MICE Gordon L McConnachle BSc MSc CEng MCIWEM MICE |
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| Affiliation: | Student;Lecturer in Civil and Environmental Engineering, Institute for Infrastructure and Environment, School of Engineering and Electronics, College of Science and Engineering, The University of Edinburgh;University Fellow. |
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| Abstract: | The performance of a novel industrial membrane bioreactor (MBR) comprising denitrification, nitrification and ultrafiltration for the secondary treatment of primary treated animal rendering wastewater has been compared with an experimental, low-cost and novel vertical-flow constructed wetland planted with Typha latifolia L. (Reedmace or Broad-leaved Cattail). The process wastewater followed pre-treatment by dissolved air flotation (DAF). The mean DAF effluent gave highly variable chemical oxygen demand (COD) and ammonia concentrations of 5816 (standard deviation (SD): 3005.0) and 614 (SD: 268.7) mg/l, respectively. The mean MBR effluent for COD and ammonia was 37 and 86 mg/l, respectively. The mean treatment performance of the constructed wetland for COD, ammonia and suspended solids was 205, 67 and 57 mg/l, respectively. |
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| Keywords: | Constructed wetland data variability denitrification dissolved air flotation nitrification rendering plant effluent ultrafiltration and water quality |
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