Techno-Economic Assessment of Full Scale MBBRs Treating Municipal Wastewater Followed by Different Tertiary Treatment Strategies: A Case Study from India

摘要

The moving bed bioreactors (MBBRs) systems have been reported as sustainable treatment systemsfor municipal as well as industrial wastewaters in developing countries. However, the inability of theMBBR process to meet the current disposal standards has given enough stimulation for ensuingappropriate tertiary treatment. This study was aimed to techno-economic evaluation of differenttertiary treatment strategies (physico-chemical processes) of three full-scale moving bed bioreactor(MBBR) systems to make it justifiable for environmental protection, resource preservation and recoveringmaximum resources. The combination of the MBBR and tertiary treatment enhanced the performanceof the overall treatment process and the COD removal efficacy of the whole treatment system reachedupto 96%. The approximate cost of the treatment and specific power consumption was analyzed asRs. 12.50 (± 20%) and 0.6 (±20%) kWh/m 3 respectively, as depending on the terrain, drive, electricitycost and area classification. Average land requirement was estimated as ~180 m 2 (±20%) and pollutantremoval efficiencies were noted as ~95% (±3%). This conceptual approach allows a direct up scalingof small scale wastewater treatment plants and explores the reusability potential of treated effluent ofthis kind of system.