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Optimisation of mechanical surface aeration of activated sludge. A demonstration at Blackburn Meadows Sewage Treatment Works, Sheffield (GB)

Miscellaneous:

Abstract

Modifications were made in 1986 to the surface aeration sewage treatment plant at Blackburn Meadows in the United Kingdom to improve aeration efficiency. The four original lanes were each powered by four identically sized 37 kW aerators. The aerators in three of the lanes were replaced with a tapered system designed to match the decreasing demand for oxygen through the aeration lanes. In addition, dissolved oxygen (DO) control systems were installed to reduce over-aeration at periods of low loading. The control options selected were: Lane 1 -Outlet weir level control; Lane 2 -Outlet weir level control + on /off switching of aerators; Lane 3 - Variable speed control + on/off switching; Lane 4 -No control. The modified plant has operated very successfully. The most significant savings, compared with unmodified plant, were made in Lanes 2 and 3. Energy savings in these Lanes were 40% and 33% respectively, and annual cost savings 46,000 pounds/year and 37,900 pounds/year respectively. Other benefits area: 40% increase in throughput from 61 M1/day to 85.2 M1/day and improved effluent quality. (author).
Publication Date:
Feb 01, 1990
Product Type:
Miscellaneous
Report Number:
GB-405; NP-6
Reference Number:
SCA: 320303; PA: GB-91:052672; SN: 92000649674
Resource Relation:
Other Information: DN: New Practice report produced under the Best Practice programme for the Energy Technology Support Unit, Harwell (GB).; PBD: Feb 1990
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; SEWAGE SLUDGE; AERATION; ACTIVATED SLUDGE PROCESS; ENERGY EFFICIENCY; DEMONSTRATION PLANTS; OPTIMIZATION; MODIFICATIONS; CONTROL SYSTEMS; DISSOLVED GASES; OXYGEN; 320303; EQUIPMENT AND PROCESSES
OSTI ID:
10115068
Research Organizations:
Department of Energy, London (United Kingdom). Energy Efficiency Office; Atkins (W.S.) Energy Ltd., Epsom (United Kingdom)
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE92761618; TRN: GB9152672
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
GB
Size:
37 p.
Announcement Date:
Jun 30, 2005

Miscellaneous:

Citation Formats

None. Optimisation of mechanical surface aeration of activated sludge. A demonstration at Blackburn Meadows Sewage Treatment Works, Sheffield (GB). United Kingdom: N. p., 1990. Web.
None. Optimisation of mechanical surface aeration of activated sludge. A demonstration at Blackburn Meadows Sewage Treatment Works, Sheffield (GB). United Kingdom.
None. 1990. "Optimisation of mechanical surface aeration of activated sludge. A demonstration at Blackburn Meadows Sewage Treatment Works, Sheffield (GB)." United Kingdom.
@misc{etde_10115068,
title = {Optimisation of mechanical surface aeration of activated sludge. A demonstration at Blackburn Meadows Sewage Treatment Works, Sheffield (GB)}
author = {None}
abstractNote = {Modifications were made in 1986 to the surface aeration sewage treatment plant at Blackburn Meadows in the United Kingdom to improve aeration efficiency. The four original lanes were each powered by four identically sized 37 kW aerators. The aerators in three of the lanes were replaced with a tapered system designed to match the decreasing demand for oxygen through the aeration lanes. In addition, dissolved oxygen (DO) control systems were installed to reduce over-aeration at periods of low loading. The control options selected were: Lane 1 -Outlet weir level control; Lane 2 -Outlet weir level control + on /off switching of aerators; Lane 3 - Variable speed control + on/off switching; Lane 4 -No control. The modified plant has operated very successfully. The most significant savings, compared with unmodified plant, were made in Lanes 2 and 3. Energy savings in these Lanes were 40% and 33% respectively, and annual cost savings 46,000 pounds/year and 37,900 pounds/year respectively. Other benefits area: 40% increase in throughput from 61 M1/day to 85.2 M1/day and improved effluent quality. (author).}
place = {United Kingdom}
year = {1990}
month = {Feb}
}