Energy recovery and emissions of PBDD/Fs and PBDEs from cocombustion of woodchip and wastewater sludge in an industrial boiler
| Autor: | Shun-Shiang Chang Chang, Chang-Yu Wu, Lin-Chi Wang Wang, Guo-Ping Chang-Chien, Wen-Jhy Lee Lee |
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| Rok vydání: | 2013 |
| Předmět: |
Pollutant
Waste Products Flue gas Air Pollutants Sewage Chemistry General Chemistry Wastewater Combustion Dioxins Wood Congener Polybrominated diphenyl ethers Environmental chemistry Halogenated Diphenyl Ethers Environmental Chemistry Sewage sludge treatment Sewage treatment Gases Environmental Monitoring |
| Zdroj: | Environmental sciencetechnology. 47(21) |
| ISSN: | 1520-5851 |
| Popis: | The emissions of polybrominated dibenzo-p-dioxins, dibenzofurans (PBDD/Fs), and polybrominated diphenyl ethers (PBDEs) from trial combustion of 10 wt % dried industrial-wastewater-treatment sludge (IWTS) and 90 wt % woodchip in an industrial boiler were investigated and compared to that from woodchip combustion. The PBDD/F toxic equivalent (TEQ) and PBDE emissions increased from 0.121 pg TEQ Nm-3 and 2260 pg Nm-3respectively, of the woodchip combustion to 0.211 pg TEQ Nm-3 and 4200 pg Nm-3respectively, of the trial combustion. PBDD/F and PBDE congener profiles of inputs and outputs of the same type of combustion were similar; they also show similarity between woodchip and trial combustions, revealing that the destruction pathway was little affected by the introduction of the IWTS. The fates of PBDD/Fs and PBDEs show that the indigenous pollutants in the feed were effectively depleted (>93.5%). The dominant releasing route of PBDD/F and PBDE shifted from the stack flue gas of woodchip combustion to the ashes of trial combustion. This study demonstrates that co-combustion not only handles the fast growing sludge stream but also yields a saving of 26.3% in the fuel cost and treatment fees of sludge and ashes. |
| Databáze: | OpenAIRE |
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