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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Evaluation of different wastewater treatment processes and development of a modified attached growth bioreactor as a decentralized approach for small communities
The Scientific World Journal, Volume 2013, Article 156870, Year 2013
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Description
This study was undertaken to evaluate the potential future use of three biological processes in order to designate the most desired solution for on-site treatment of wastewater from residential complexes, that is, conventional activated sludge process (CASP), moving-bed biofilm reactor (MBBR), and packed-bed biofilm reactor (PBBR). Hydraulic retention time (HRT) of 6, 3, and 2 h can be achieved in CASP, MBBR, and PBBR, respectively. The PBBR dealt with a particular arrangement to prevent the restriction of oxygen transfer efficiency into the thick biofilms. The laboratory scale result revealed that the overall reduction of 87% COD, 92% BOD5, 82% TSS, 79% NH3-N, 43% PO4-P, 95% MPN, and 97% TVC at a HRT of 2 h was achieved in PBBR. The microflora present in the system was also estimated through the isolation, identification, and immobilization of the microorganisms with an index of COD elimination. The number of bacterial species examined on the nutrient agar medium was 22 and five bacterial species were documented to degrade the organic pollutants by reducing COD by more than 43%. This study illustrated that the present PBBR with a specific modified internal arrangement could be an ideal practice for promoting sustainable decentralization and therefore providing a low wastage sludge biomass concentration. © 2013 Shohreh Azizi et al.
Authors & Co-Authors
Azizi, Shohreh
South Africa, Potchefstroom
North-west University
Valipour, Alireza
South Korea, Gyeongsan
Yeungnam University
Sithebe, Thami
South Africa, Potchefstroom
North-west University
Statistics
Citations: 60
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1155/2013/156870
e-ISSN:
1537744X
Research Areas
Environmental