Premium
Comparison of Alternative Operating Modes on the Halifax Activated‐Sludge Plant
Author(s) -
JONES G. A.
Publication year - 1991
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.1747-6593.1991.tb00586.x
Subject(s) - settling , activated sludge , sewage , sewage treatment , environmental science , waste management , sewage sludge , environmental engineering , electricity , engineering , electrical engineering
Since 1981 the activated‐sludge plants at Halifax sewage‐treatment works have been operated in the ‘Halifax’mode, which has successfully prevented previous bulking of the activated sludge. The paper describes an investigation of the ‘Halifax’mode; also the ‘Halifax’mode plus a sludge bypass arrangement. Plant performance, sewage flows, and electricity and oxygen usages were monitored. Practical measurements showed that an increase of 65% in peak final settling tank flow rates could be achieved, and up to twice the BOD load could be treated with the assistance of extra oxygen, using the existing Vitox plant. The improved settling tank performance can be explained in terms of the Water Research Centre's mass loading theory.