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Das Oxitron‐System, ein neues biologisches Abwasserreinigungs‐Verfahren für den BSB 5 ‐Abbau sowie zur Nitrifikation und Denitrifikation
Author(s) -
Becker KlausPeter
Publication year - 1979
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330510603
Subject(s) - nitrification , denitrification , environmental engineering , volume (thermodynamics) , biomass (ecology) , chemistry , sewage treatment , waste management , environmental science , engineering , nitrogen , ecology , physics , organic chemistry , quantum mechanics , biology
The oxitron system: a new biological sewage treatment process for reducing BOD 5 and for nitrification and denitrification . In the oxitron process, the waste water passes through a fluidized sand bed. As in the case of droplets, a stable biological slime is formed on the sand particles. The particular efficacy of the process can be explained in terms of the high specific surface, of the order of more than 3000 m 2 per m 3 reactor volume. This leads to a particularly effective use of available space. The high content of biomass makes the process largely insensitive to fluctuations in feed rates and toxic effects. The oxitron process is used as a biological purification stage for reducing BOD 5 or as the third purification stage for nitrification and denitrification. The reactor can be operated at particularly high solids concentrations (ca. 20 g/l). The correspondingly high oxygen consumption of this process requires the use of pure oxygen in the aerobic step; over 90% of the oxygen supply is utilized. The special advantages of the oxitron process are: (1) 30% lower capital costs than for conventional processes (operating costs are comparable); (2) space requirements are some 80% lower than for the best conventional technology presently available, facilitating expansion; (3) the mode of operation is extremely simple and is not subject to interference by blockages, etc. Design data and results for large scale test plant are reported.