Design Considerations for Off-Line Storage Tanks
Abstract:This paper presents design considerations for off-line storage tanks to be used for the control of combined sewer or sanitary sewer overflows. Some of the considerations presented will be useful at the concept design level, while other considerations will be more appropriate at the preliminary design level. The paper draws on experience gained in the design of multiple types of storage tanks, and is intended to be a useful guideline in developing layouts of storage tank facilities. Major topics that are covered include: tank layout (basic geometry, tank depth/area relationships, internal configuration); tank construction (pre-cast vs. cast-in-place construction); tank flushing (water cannons, flushing gates, and tipping buckets); tank dewatering (types and arrangements of dewatering pumps, strategies for sizing pumps and optimizing dewatering operations); ventilation/odor control (technologies, ventilation rates, fresh air intake structures, internal ductwork); influent facilities (isolation gates, screens, influent pumps); tank overflow/bypass; and above-grade buildings/features.
Document Type: Research Article
Publication date: January 1, 2008
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