sludge thickening. Thickening is the first, and frequently inevitable, step in reducing the volume of sludge extracted from the water line. In fact, it is used to optimise the subsequent conditioning, stabilisation and dewatering stages by reducing structure sizes and operating costs. Extremely dilute sludge delivered by the water line (usually Paste Thickener Design Variables. Paste thickeners are uniquely different than conventional and high-rate thickeners. High-rate thickeners, that produce a settling slurry underflow, have been in use for decades. Thickener selection is based on feed characteristics and standard bench-scale tests combined with experience. Introduction Feed dilution or solids-liquid weight The English word "sedimentation" ratio is derived from the Latin verb "sedere" Size and shape of the particulate meaning to sink down. As a mineral solids processing unit operation, sedimentaSpecific gravity differential between tion has been defined as the separation the solids and liquid phases of a suspension into a supernatant presence of Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. Capacity: 300,000 m3· d-1. 52 m diameter, centrally driven thickener and sludge pumping in the centre well. In working conditions, a static thickener is simple to operate but a few checks are compulsory: checking blanket depth (manually or using a probe), checking overflows (usually 150 to 500 mg suspended solids · L -1 ), checking MIP Thickener Design The following is a short cut to designing your own thickener: (a) Size of Thickener As a first stab we can either use the thickener flux (m. 2 /tpd) or the rise rate, depending if solids loading is the dominant (eg. The gravity thickening design is similar to a clarifier. Thickeners are usually circular-shaped; the feed is carried out through a pipe to a central hood serving as distribution and still area, with a height that has no effect on compaction or compression bottom area. Except for small thickeners, static and with hopper floo r, these units have Thickener Feed System Design. Philip Lake June 14, 2016. Philip Lake reviews WesTech's EvenFlo® feedwell design for the even distribution of the feed slurry in order to provide the end user with the most economical thickener in terms of flocculant consumption and size. Gravity thickeners concentrate suspended solids in minerals slurries. Gravity Thickener Design Example. For the purposes of this example, the solids to be thickened are excess activated sludge with an initial solids concentration of 7 gm/l (0.434 lb/ft3). This sludge continuously enters the thickener, and the thickened sludge is continuously withdrawn at a concentration of 21 gm/l (1.302 lb/ft3). The underlying theory permitted the development of software for the design and simulation of conventional industrial thickeners were the product is the unit area, the concentration profile and the Special thanks to Harold Haag, Forrest Hentz and Caroline Wilson for developing the paint applications data. For more information on thickeners, contact Aqualon Division, Hercules Inc., 1313 N. Market St., Wilmington, DE 19894; phone 302/594.5000; fax 302/992.7178; visit aqualon.com; e-mail jsturgil1@herc.com. Rotary Drum Thickener bdpindustries.com Industry Leader in Design and Manufacture of Thickening, Dewatering, and Composting Systems. The RDT is a simple, time-