Performance evaluation of a natural treatment system for small communities, composed of a UASB reactor, maturation ponds (baffled and unbaffled) and a granular rock filter in series
| Autor: | V. A. J. Rodrigues, M. von Sperling, D. F. C. Dias, Calebe Rodrigues Soares Santos, Ricardo Gomes Passos, M. P. de Matos |
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| Rok vydání: | 2017 |
| Předmět: |
Irrigation
Hydraulic retention time 0208 environmental biotechnology Sewage 02 engineering and technology 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Bioreactors Ammonia Environmental Chemistry Anaerobic reactor Anaerobiosis Ponds Waste Management and Disposal Effluent 0105 earth and related environmental sciences Water Science and Technology Biological Oxygen Demand Analysis Treatment system business.industry Environmental engineering General Medicine 020801 environmental engineering Filter (aquarium) Who guidelines Environmental science business Brazil Filtration |
| Zdroj: | Environmental Technology. 39:490-502 |
| ISSN: | 1479-487X 0959-3330 |
| DOI: | 10.1080/09593330.2017.1304456 |
| Popis: | Post-treatment of anaerobic reactor effluent with maturation ponds is a good option for small to medium-sized communities in tropical climates. The treatment line investigated, operating in Brazil, with an equivalent capacity to treat domestic sewage from 250 inhabitants, comprised a upflow anaerobic sludge blanket reactor followed by two shallow maturation ponds (unbaffled and baffled) and a granular rock filter (decreasing grain size) in series, requiring an area of only 1.5 m2 inhabitant−1. With an overall hydraulic retention time of only 6.7 days, the performance was excellent for a natural treatment system. Based on over two years of continuous monitoring, median removal efficiencies were: biochemical oxygen demand = 93%, chemical oxygen demand = 79%, total suspended solids = 87%, ammonia = 43% and Escherichia coli = 6.1 log units. The final effluent complied with European discharge standards and WHO guidelines for some forms of irrigation, and appeared to be a suitable alternative for treati... |
| Databáze: | OpenAIRE |
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