Ozonation of refractory chemicals in leachate with hydrogen peroxide
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| Titel: | Ozonation of refractory chemicals in leachate with hydrogen peroxide |
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| Autoren: | Fang, HPH, Lau, WCI, Wang, P |
| Quelle: | Journal of environmental sciences (China). 14(4) |
| Verlagsinformationen: | I O S Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.php, 2003. |
| Publikationsjahr: | 2003 |
| Schlagwörter: | Nitrogen, Hydrogen Peroxide - chemistry, 01 natural sciences, Environmental, Water Purification, Chemical - metabolism, Bioreactors, Ozone, Water Pollutants, Anaerobiosis, Water Pollutants, Chemical - metabolism, 0105 earth and related environmental sciences, Volatile - analysis, Nitrogen - analysis, Sewage, Fatty Acids, Hydrogen Peroxide, Fatty Acids, Volatile, 6. Clean water, Water Purification - methods, Biodegradation, Environmental, Fatty Acids, Volatile - analysis, Biodegradation, Hong Kong, Ozone - chemistry, Water Pollutants, Chemical |
| Beschreibung: | Nearly 97% of organic chemicals in Hong Kong leachate could be effectively removed by the UASB(upflow anaerobic sludge blanket) process followed by the fenton coagulation. The COD of leachate was lowered from an average of 12900 mg/L to 1440 mg/L after the UASB treatment, and was further lowered to 394 mg/L after the fenton coagulation. The remaining refractory residues could be further removed by ozonation with the addition of H2O2. The ozonation for the supernatant of the fenton coagulation was most effective at pH 7-8, with the addition of 300 mg/L of H2O2, and 30 min of reaction. The final effluent contained only 85 mg/L of COD and 10 mg/L of BOD5. On the other hand, direct ozonation of UASB effluent lowered the COD to 905 mg/L and BOD5 to 103 mg/L. Ozonation improved the biodegradability of the organic residues, and also converted part of organic-N in the leachate into NH3-N and NO-3-N. link_to_subscribed_fulltext |
| Publikationsart: | Article |
| Sprache: | English |
| ISSN: | 1001-0742 |
| Zugangs-URL: | https://pubmed.ncbi.nlm.nih.gov/12491723 http://hdl.handle.net/10722/71122 |
| Dokumentencode: | edsair.pmid.dedup....48504b2d8b8b05d0f9b38d4f908856c9 |
| Datenbank: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstract: | Nearly 97% of organic chemicals in Hong Kong leachate could be effectively removed by the UASB(upflow anaerobic sludge blanket) process followed by the fenton coagulation. The COD of leachate was lowered from an average of 12900 mg/L to 1440 mg/L after the UASB treatment, and was further lowered to 394 mg/L after the fenton coagulation. The remaining refractory residues could be further removed by ozonation with the addition of H2O2. The ozonation for the supernatant of the fenton coagulation was most effective at pH 7-8, with the addition of 300 mg/L of H2O2, and 30 min of reaction. The final effluent contained only 85 mg/L of COD and 10 mg/L of BOD5. On the other hand, direct ozonation of UASB effluent lowered the COD to 905 mg/L and BOD5 to 103 mg/L. Ozonation improved the biodegradability of the organic residues, and also converted part of organic-N in the leachate into NH3-N and NO-3-N.<br />link_to_subscribed_fulltext |
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| ISSN: | 10010742 |