Practical Manual for Determining Settling Rates of Ocean Disposed Sewage Sludge

摘要

The purpose of the manual is to describe a practical approach to the measurement of the size and settling velocity characteristics of sewage sludge particles in seawater. Three measurement sequences are required for complete characterization, but each can be performed separately according to the goals or needs of the user. The first measurement sequence provides percent total solids and some size characterization of the material. The second set of measurements results in a settling velocity distribution of the larger (coarser) fraction of the sludge. The third sequence of measurements is intended to provide a settling velocity distribution for the fine-fraction of sludge particulates. The user of the manual must first decide how much information about his samples is needed.