Overview : full scale experience of the SHARON process for treatment of rejection water of digested sludge dewatering
A SHARON system has been constructed at the Utrecht WWTP and at the Rotterdam Dokhaven WWTP. In the SHARON process rejection water from dewatering of digested sludge is treated for N-removal. It concerns a high active process operating without sludge retention. Due to differences in growth rate nitr...
| Veröffentlicht in: | Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 44(2001), 1 vom: 15., Seite 145-52 |
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| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2001
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| Zugriff auf das übergeordnete Werk: | Water science and technology : a journal of the International Association on Water Pollution Research |
| Schlagworte: | Journal Article Sewage Carbon Dioxide 142M471B3J Ammonia 7664-41-7 Nitrogen N762921K75 |
| Zusammenfassung: | A SHARON system has been constructed at the Utrecht WWTP and at the Rotterdam Dokhaven WWTP. In the SHARON process rejection water from dewatering of digested sludge is treated for N-removal. It concerns a high active process operating without sludge retention. Due to differences in growth rate nitrite oxidisers can be washed out of the system while ammonia oxidisers are maintained, resulting in N-removal over nitrite. The SHARON process was selected in competition with several other techniques. The feed of a SHARON system is concentrated, with ammonia concentrations ranging from 0.5 to 1.5 g N/l. The results show that conversion rates of 90% are well possible with N-removal mainly via the nitrite route. The process was shown to be stable. Due to the high ammonium influent concentrations pH control is of great importance, preventing process inhibitions. The acidifying effect of nitrification can be compensated completely by CO2 stripping during aeration and by denitrification. Heat production by biological conversions is significant, due to the high inlet concentrations, and contributes to the optimal operating temperature of 30-40 degrees C |
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| Beschreibung: | Date Completed 07.12.2001 Date Revised 21.11.2013 published: Print Citation Status MEDLINE |
| ISSN: | 0273-1223 |