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Concentrate recycle

FIG. 24-24 Effect of recycle on steady-state concentrations of cell mass and limiting nutrient. 5-fold increase in cell concentration in separator. SiiLscripts denote fraction of cell concentrate recycled. [Pg.2147]

Processes for SS separation may fill three distinct functions in wastewater treatment, namely, pretreatment to protect subsequent processes and reduce their loadings to required levels, treatment to reduce effluent concentrations to required standards, and separation of solids to produce concentrated recycle streams required to maintain other processes. In the first two functions effluent quality is the prime consideration, but where the third function must be fulfilled along with one of the others, design attention must be given to conditions for both the separated solids (sludge) and the process effluent. [Pg.403]

Concentrate recycle RO plants allow some of the brine reject water to recycle back through the plant, which improves the permeate recovery rate. (The reduced flow of brine reject water does of course have a proportionally higher TDS level.) Various types of high pressure, corrosion-resistant pumps are used, including multistage, centrifugal and plunger pumps, each with their own benefits and area of application. [Pg.366]

Concerns about groundwater contamination and municipal water supply quality have driven much of the growth of various water treatment schemes involving nanofiltration as a stand-alone process or in combination with RO and/or UF in a broad range of water treatment systems delivering precise purity levels and attractive process economics. Other established applications include corn syrup concentration, recycling of water-soluble polymers, effluent treatment for the food and beverage industry, metal... [Pg.383]

Figure 5.6 shows an RO array with concentrate recycle. A concentrate recycle is generally used in smaller RO systems, where the cross-flow velocity is not high enough to maintain good scouring of the membrane surface. The return of part of the concentrate to... [Pg.89]

Concentration Recycle 3 Experiment Rinse Loss Loss Loss... [Pg.248]

The RO unit was operated at 13 bar, permeate was discharged and concentrate recycled into the feed tank for further concentration. The final volume of a batch was limited by the inner volume of the unit with about 15 L usually obtained, including concentrate washed out of the unit at the end of cycle. The concentration in this final liquid changed depending on the volume of the batch treated at that time. [Pg.319]

Lead Operations treats zinc plant residues, lead concentrates, recycled batteries, and lead bullion to produce silver, gold, bismuth, arsenic metal, copper sulphate, copper arsenate, sodium antimonate and about 100,000 t/a of refined lead. The lead smelter has been well described previously (2). Key aspects of the lead process flowsheet, as shown in Figure 3, are described herein. [Pg.311]

Figure 2.24 Block-flow diagram of the single-pass RO membrane design given in Table 2.11 with reject recycling. Stream 1 is feed, 2 is blended feed, 3 is membrane array pressurised feed, 4 is reject, 5 is reject/concentrate recycle, 6 is reject-to-drain, and 7 is permeate. Figure 2.24 Block-flow diagram of the single-pass RO membrane design given in Table 2.11 with reject recycling. Stream 1 is feed, 2 is blended feed, 3 is membrane array pressurised feed, 4 is reject, 5 is reject/concentrate recycle, 6 is reject-to-drain, and 7 is permeate.
The test unit used operates with four modules aligned in parallel. The filtration unit is approximately 13 feet long, 5 feet wide, and 7 feet high and contains an estimated total membrane area of up to 300 square feet. Automatic level controls provide for unattended operation with continuous feed to the tank. Concentrate recycle flow also can be controlled automatically. Figure 2 provides a schematic of the filtration unit. [Pg.194]

Lykkesfeldt, J. Hagen, T. M. Vinarsky, V. Ames, B. N. 1998. Age-associated decline in ascorbic acid concentration, recycling, and biosynthesis in rat hepatocytes—reversal with (R)-alpha-bpoic acid supplementation. MSEB/. 12(12) 1183-1189. [Pg.274]

REJECT RECYCLE Figure 5.6 Two-by-one array with concentrate recycle. [Pg.100]

Concentrate recycle rate WAVE allows for concentrate recycle from either pass to itself or an upstream pass (e.g. from the concentrate of Pass 2 to the feed of Pass 2 or the feed of Pass 1)... [Pg.267]

Stage level concentrate recycle not enabled Stage level concentrate recycle enabled... [Pg.274]

Pass 1 Concentrate recycle to feed stream. This is helpful to increase brine flow in smaller RO designs. [Pg.279]


See other pages where Concentrate recycle is mentioned: [Pg.821]    [Pg.514]    [Pg.896]    [Pg.916]    [Pg.276]    [Pg.90]    [Pg.348]    [Pg.348]    [Pg.350]    [Pg.514]    [Pg.142]    [Pg.151]    [Pg.156]    [Pg.162]    [Pg.162]    [Pg.195]    [Pg.90]    [Pg.348]    [Pg.348]    [Pg.350]    [Pg.282]    [Pg.124]    [Pg.399]    [Pg.403]    [Pg.403]   
See also in sourсe #XX -- [ Pg.71 ]




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Flow patterns concentrate recycle

Recycle array with concentrate

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