Premium
Computer‐aided Load Smoothing with Energy Management (CALSEM) for Activated‐sludge Sewage Treatment Plants
Author(s) -
NAGHDY G.,
HELLIWELL P.
Publication year - 1987
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.1747-6593.1987.tb01233.x
Subject(s) - sewerage , sewage treatment , process engineering , activated sludge , process (computing) , computer science , environmental science , engineering , waste management , operating system
SYNOPSIS R esearch over a ten‐year period leading up to a set of ten experiments lasting two years on a large two‐stream pilot sewage‐treatment plant has demonstrated process improvements and potential for considerable energy‐saving. A reliable, low‐cost, user‐friendly computer system is used to control the outflow from balancing storage, using available sensors. The automation system can also control de‐sludging and activatedsludge surplusing as well as monitoring and storing data on plant performance. A strategy for forecasting flow and load is effective in minimizing balancing volume. The system shows clear process improvements in reducing the risk of bulking sludge, in nitrification, and in reducing air requirement. Control of storage within the sewerage system, using forecasting, may provide some or all of the storage required. Existing tankage will, in many cases, provide the remainder of storage needed.