Hybrid wastewater treatment system based in a combination of high rate algae pond and vertical constructed wetland system at large scale
| Autor: | Carlos Saúco, Raúl Cano, David Marín, Enrique Lara, Zouhayr Arbib, Frank Rogalla |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category biology Process Chemistry and Technology Dissolved air flotation 0207 environmental engineering Wetland 02 engineering and technology 010501 environmental sciences biology.organism_classification Pulp and paper industry 01 natural sciences 6. Clean water Activated sludge Wastewater Algae Hybrid system Constructed wetland Environmental science Sewage treatment 020701 environmental engineering Safety Risk Reliability and Quality Waste Management and Disposal 0105 earth and related environmental sciences Biotechnology |
| Zdroj: | Journal of Water Process Engineering. 43:102311 |
| ISSN: | 2214-7144 |
| DOI: | 10.1016/j.jwpe.2021.102311 |
| Popis: | This study aims to compare a conventional wastewater treatment plant and a hybrid alternative treatment plant for the treatment of real urban wastewater from the city of Almeria, Spain. The hybrid treatment plant combines a semi-extensive wastewater treatment systems such as a high rate algae pond (HRAP), a dissolved air flotation unit to separate algae biomass from treated wastewater and an extensive wastewater treatment systems such as vertical flow constructed wetlands. The conventional wastewater treatment plant has a treatment capacity of 4000 m3 d−1. The experimental demo plant with a 3000 m2 HRAP and 200 m2 of wetlands surface has been operated throughout one year in parallel with a conventional activated sludge full-scale plant, obtaining a complete comparison of both systems. Regarding removal efficiencies, the new hybrid system achieved values of 96.6%, 76.6% 89.8% and 99.9% for COD, TN, TP and TSS, respectively. The hybrid systems reach disinfection rates of 4 and 5 log units for total coliforms and E.Coli, respectively. Energy demand required in the hybrid system was five times lower than a conventional activated sludge (0.1 kWh m−3). The results here obtained demonstrated the capacity of using hybrid alternative treatment plant as an efficient way of treating wastewater in small populations. |
| Databáze: | OpenAIRE |
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