Minimization of hazardous sludge production using a bioelectrochemical system supplied by an alternating current electric field
| Autor: | Somayyeh Dehghani, Abbas Rezaee, Zohreh Moghiseh |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Biophysics
chemistry.chemical_element Steel wool 02 engineering and technology Bacterial growth Wastewater 01 natural sciences Hazardous Substances chemistry.chemical_compound Bioreactors Electricity Electrochemistry Bioreactor Phenol Biomass Physical and Theoretical Chemistry Biological Oxygen Demand Analysis Sewage 010401 analytical chemistry General Medicine Electrochemical Techniques 021001 nanoscience & nanotechnology Pulp and paper industry Nitrogen 0104 chemical sciences chemistry Yield (chemistry) 0210 nano-technology Carbon Voltage |
| Zdroj: | Bioelectrochemistry (Amsterdam, Netherlands). 132 |
| ISSN: | 1878-562X |
| Popis: | In the present study, minimization of hazardous bio-sludge production was investigated using a bioelectrochemical system supplied by an alternating current electric field and supplemented with phenol as a cabon source. The experiments were conducted in an air-conditioned bioreactor and at neutral pH value. Moreover, steel wool and carbon cloth were utilized as electrodes in the bioelectrochemical system. The experiments were operated in an air-conditioned bioreactor at 25 ℃ and a neutral pH value with carbon to nitrogen (C/N) ratio of 0.5–6. The results obtained showed that complete phenol electro-biodegradation occurred at a C/N ratio of a frequency of 5 Hz, and 0.4 peak-to-peak voltage (Vpp) over 2 h. Besides, sludge production and sludge yield were obtained at the C/N ratio of 0.5–6 by 200–382 mg VSS/g COD and 82–89.4 mg TSS/g COD, respectively. Ultimately, the C/N ratio of 1 seemed to be optimum for microbial growth with the phenol biodegradation efficiency of 99.9% as well as the lowest sludge production. These results demonstrated that the proposed bioelectrochemical system supplied by low-frequency and low-voltage electric current could reduce hazardous sludge production. |
| Databáze: | OpenAIRE |
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