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2019 | 28 | 4 |
Tytuł artykułu

Novel advanced treatment of physically treated effluent from herbal decoction pieces wastewater using a combined Ozone/Persulfate-UBAF Process

Warianty tytułu
Języki publikacji
EN
Abstrakty
Performance of ozone/persulfate-UBAF used for advanced treatment of physically treated effluent from herbal decoction pieces of wastewater was investigated in a pilot scale experiment. Under optimum conditions – i.e., an initial pH, temperature 13-27ºC, 30 min of oxidation, 35 mg/L O₃ dosage, S₂ O₈²⁻ /COD (g/g) ratio (0.15), gas/liquid ratio in UBAF (3), hydraulic retention time in UBAF (5h)– the COD and NH₃ -N removal efficiencies were 87.54-89.53% and 82.94-86.77%, respectively. Under optimum conditions, ozone/persulfate oxidation lowered pH values by about 0.1 pH units (average value), presented lower OCC (from 0.14 to 0.16 kg O₃ /kg COD removed), and significantly improved the wastewater biodegradability from 0.16 to 0.55 (average value). Compared with O₃ /H₂ O₂ oxidation, the ozone/persulfate system achieved a better enhancement effect in wastewater treatment (i.e., decreased 24.0% OCC and saved 11.4% in operational costs). Furthermore, the COD removal rate in ozone/persulfate oxidation stage followed the first order ln(C/C₀)=- 0.0167t , and the COD concentration in UBAF effluent was expressed by the model C/C₀=exp(-0.2940/-L⁰‧⁰⁹¹² H) at various hydraulic loading ratesfor maintenance and selection of UBAF. Finally, the study proved that the combined process was an efficient technology in treating physically treated effluent from herbal decoction pieces wastewater.
Słowa kluczowe
EN
Wydawca
-
Rocznik
Tom
28
Numer
4
Opis fizyczny
p.2857-2866,fig.,ref.
Twórcy
autor
  • Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou, Jiangsu Province, China
  • Province Key Laboratory of Environmental Material and Environmental Engineering, Yangzhou University, Yangzhou, Jiangsu Province, China
  • State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, China
  • Province Key Laboratory of Environmental Engineering, Jiangsu Environmental Science Research Institute, Nanjing, Jiangsu Province, China
autor
  • Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou, Jiangsu Province, China
autor
  • Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou, Jiangsu Province, China
autor
  • Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou, Jiangsu Province, China
autor
  • Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou, Jiangsu Province, China
autor
  • Province Key Laboratory of Environmental Material and Environmental Engineering, Yangzhou University, Yangzhou, Jiangsu Province, China
autor
  • Province Key Laboratory of Environmental Engineering, Jiangsu Environmental Science Research Institute, Nanjing, Jiangsu Province, China
autor
  • State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, China
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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