Direct treatment of high-strength soft drink wastewater using a down-flow hanging sponge reactor: performance and microbial community dynamics
| Autor: | Curtis Fang, Jimmy Yu, Eric Willman, Arun Sathyagal, Junhui Liao, Wen Tso Liu |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Nitrogen Microbial Consortia Carbonated Beverages Wastewater Applied Microbiology and Biotechnology Waste Disposal Fluid 03 medical and health sciences Bioreactors RNA Ribosomal 16S Proteobacteria Biomass Effluent Total organic carbon Biological Oxygen Demand Analysis biology Bacteria Sewage Ecology Bacteroidetes Chemical oxygen demand Substrate (chemistry) Genetic Variation General Medicine biology.organism_classification Pulp and paper industry Carbon Sponge 030104 developmental biology Microbial population biology Soft drink Biotechnology |
| Zdroj: | Applied microbiology and biotechnology. 101(14) |
| ISSN: | 1432-0614 |
| Popis: | A stand-alone down-flow hanging sponge (DHS) system with a two-stage configuration was operated for 700 days to treat synthetic soft drink wastewater at 3000 mg/L chemical oxygen demand (COD). Throughout the operation,90% COD and total organic carbon (TOC) removal efficiency was obtained by the first stage, and a final effluent of COD60 mg/L (TOC20 mg/L) was consistently maintained with the second stage. Lower organic removal efficiency was observed to closely correlate with lower pH, higher volatile fatty acid (VFA) concentration, and higher suspended solid (SS) in the effluent. Occasionally, biomass sloughing was observed as a cause to unstable reactor performance in the first stage. The microbial community of the retained biomass on the sponges differed significantly based on spatial locations of sponges, sampling time points, and loading shocks. In general, Proteobacteria were found to be more abundant in the reactor at an organic removal efficiency80% than that at50%. Specifically, operational taxonomic units closely related to Tolumonas auensis and Rivicola pingtungensis were identified as important populations that were responsible for degrading the major substrate in the soft drink wastewater toward to the end of the reactor operation. In addition, high abundance of Bacteroidetes in the reactor was speculated to be responsible for the VFA accumulation in the effluent. This study demonstrated that stand-alone DHS reactor could be used in treating high-strength wastewater efficiently. |
| Databáze: | OpenAIRE |
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