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Biological Wastewater Treatment under the Influence of Pressure
Author(s) -
ELLIS K. V.,
MORTIMER G. H.,
BERKTAY A.
Publication year - 1992
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1992.tb00776.x
Subject(s) - rotating biological contactor , nitrification , wastewater , bar (unit) , atmospheric pressure , sewage treatment , chemistry , environmental science , pulp and paper industry , environmental engineering , yield (engineering) , nitrogen , waste management , environmental chemistry , materials science , physics , oceanography , organic chemistry , meteorology , engineering , metallurgy , geology
An investigation is reported into the effect of pressures of up to 6 bar on the operation of a laboratory‐scale rotating biological contactor. All results are compared with those of an identical reactor operating at atmospheric pressure. Few previous results relating to the effect of pressure on biological wastewater treatment could be found in the literature. Although improved BOD and COD removal (compared to that of the reference unit) was evident as the pressure was increased, the principal benefits of increasing pressure were recorded as being (a) significantly improved nitrification, and (b) a decrease in the sludge yield coefficient. Both these factors improved regularly with increasing pressure, although there is some indication that the production of total oxidized nitrogen might have been affected at the highest pressure employed.