
	Where results make sense

Topic: Settling basin

Related Topics

Settling

Sedimentation

Sediment

In the News (Fri 19 Mar 10)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Search REALTOR.com (R)	(sponsored)
	Search Millions of MLS Listings, Find Local Agents & Expert Advice
	www.realtor.com

	Settling - Wikipedia, the free encyclopedia
		Settling is sediment that has settled at the bottom of a liquid.
		Settling velocity or fall velocity or terminal velocity (ws) of a (sediment) particle is the rate at which the sediment settles in still fluid.
		where w is the settling velocity, ρ is density (the subscripts p and f indicate particle and fluid respectively), g is the acceleration due to gravity, r is the radius of the particle and μ is the dynamic viscosity of the fluid.
	en.wikipedia.org /wiki/Settling (222 words)

	Settling basins for open feedlots - Odor and Nutrient Management Newsletter
		Basins must be designed to settle solids from runoff from a 1-hour, 10-year storm (approximately 2.5 inches per hour).
		Settling basins must have 1 square foot of surface area for every 8 cubic feet of runoff per hour from the feedlot.
		Basin surface area should be at least 1/40th of the drainage area.
	www.extension.iastate.edu /Pages/communications/EPC/Su01/settling.html (1132 words)

	WQ326 Settling Basins and Terraces for Dairy Waste, MU Extension
		Settling may remove 35 percent to 60 percent of the solids from dairy slurry, with as little as 10 minutes detention time (30 to 60 minutes detention time is common).
		Settling basins may be used to reduce the nutrient-loading on a lagoon from a gutter-flushing system, but are used more commonly to reduce the nutrient-loading on a vegetative filter strip from lot runoff.
		Adding a settling basin to remove a portion of the solids may decrease the required lagoon volume for a new facility, or it may let you increase the animal units served by an existing lagoon.
	muextension.missouri.edu /explore/envqual/wq0326.htm (3169 words)

	Ohio Livestock Manure And Wastewater Management Guide
		To prevent scouring of the settled solids from the settling basin, the liquid cross-sectional area should be about 5 percent of the ponded surface area.
		Settling basin depth is usually limited to 3 feet.
		It is often practical to provide the settling basin as part of the feedlot by providing a curb along the low part of the lot to control lot runoff.
	ohioline.osu.edu /b604/b604_22.html (2120 words)

	[No title] (Site not responding. Last check: 2007-09-14)
		Settling basins are designed to slow down runoff enough to settle solids from the hardest one-hour storm expected every 10 years.
		Purdue University research indicates 60% to 75% of manure solids settle out of runoff in a settling basin, and about 50% of the nitrogen is left in the settling basin.
		Earthen settling basins cost $3/head to $10/head, but are more difficult to clean and don’t have a solid bottom, so they never completely dry out.
	www.agweb.com /news_printer.asp?articleID=94847 (512 words)

	Chapter 9. OPTIMISATION AND UPGRADING OF A PLANT FROM 1 m3 s-1 TO 2.5 m3 s-1
		Distribution of flocculated water across the settling basins was rather poor and thus a new permeable baffle had to be installed at the entrance to each basin.
		Settled water passed from each basin over a weir that was the width of the basin at the outlet end.
		The main concern was to obtain equal flow distribution among the three flocculation basins, which was governed by the square of the ratio of the conduit velocity to the lateral velocity (Figure 8.5 shows distribution to three settling basins).
	www.who.int /docstore/water_sanitation_health/watreatplants/ch11.htm (7042 words)

	Chapter 8. OPTIMISATION AND UPGRADING OF A PLANT FROM 100 l s-1 TO 250 l s-1
		Settled water is collected in three channels 3.75 m long, located one at each side of the basin and one in the middle as shown in Figure 8.1.
		The settling velocity of the floc to be removed was 2.75 cm per min and, because it has at most 15 cm to fall, 5.45 minutes (15 cm/2.75 cm per min) had to be allowed within the apparatus.
		Floc settles out on the plates and slides down their inclined surfaces to the bottom or to the 0.20 m corridor and accumulates in the basin bottom beneath the plates, where a hydraulic system is constructed for periodic sludge removal.
	www.who.int /docstore/water_sanitation_health/watreatplants/ch10.htm (6566 words)

	Patent 4100805 (Site not responding. Last check: 2007-09-14)
		Heretofore most settling basins are filled constantly and spill over an outlet weir at the far discharge end and when the basin is full of solids to a pre-determined depth, the liquid is drawn off and the solids removed and the process continued.
		Improvements in settling basin technology and the impact of environmental considerations have led to development of new processes whereby the basin will be filled, held for settling, sampled at various depths, and then emptied from the top down so as to hold most of the suspended solids in check.
		As a result of this new approach to the treatment of fluids in settling basins, the need has arisen for a different type of sampling device, namely a device which is capable of sampling the fluid at varying depths from its surface to the bottom of the basin.
	www.freepatentsonline.com /4100805.html (2132 words)

	EQ386 Settling Basins and Terraces for Cattle Manure, MU Extension
		Settling may remove 35 percent to 60 percent of the solids from a dilute liquid slurry, with as little as 10 minutes detention time (30 to 60 minutes detention time is common).
		Settling is a good way to remove undesirable material, such as hay, straw and feathers, from the waste flow to a lagoon.
		A settling terrace, a settling diversion terrace or a settling channel is a wide, shallow, gently sloping, flat-bottomed waterway in which runoff solids settle because of low velocity.
	muextension.missouri.edu /xplor/envqual/eq0386.htm (3571 words)

	Analyst Winter 2004 - Theory of Water Clarification
		From Stoke's Law, the settling rate of a particle is related to the square of the diameter of the particle.
		The settling velocity for particles is greatly affected by the diameter of the particles.
		The settling zone is designed to have a long enough hydraulic retention time to permit solids to travel from the top of the water to the sludge zone before the flow leaves the settling zone.
	www.awt.org /members/publications/analyst/2004/winter/theory_of_water.htm (3333 words)

	Physical Treatment - Sedimentation (Site not responding. Last check: 2007-09-14)
		As is described in the course notes on Theoretical Settling Basin Design, for any given flow the surface area will determine the critical settling velocity and thus the effectiveness of the settling basin.
		Since basins also have to have the accumulated solids cleaned out, the usual minimum settling basin width is the width of the farmers scraper or loader bucket.
		This is not always a practical length, and for settling basins that treat runoff from a large feedlot or watershed it would lead to ridiculously wide settling basins.
	www.abe.iastate.edu /Ae573_ast475/Settling_Basin_Practical_Notes.htm (889 words)

	Fact Sheet: - Newfoundland Fact Sheet - Temporary Settling (Detention) Basins
		These basins are used (on a relatively short term basis) for the treatment of silted water prior to release to watercourses.
		A pipe should be installed near the top of a settling basin in such a manner that it discharges water from the top of the water column.
		There are a number of alternatives to this method of settling basin construction involving the use of various detention devices such as pre-cast manholes, and utilizing natural topographic features.
	www.dfo-mpo.gc.ca /canwaters-eauxcan/infocentre/guidelines-conseils/factsheets-feuillets/nfld/fact17_e.asp (207 words)

	Patent 4519907
		One of the problems associated with prior art grit settling basins is in relation to the means used for maintaining a proper flow of liquid through the grit settling basin such that organic solids remains suspended in the liquid while the heavier grit material will settle out.
		An inlet trough or conduit 26 is provided in fluid communication with the interior of the cylindrical grit settling chamber 12 and generally tangent with the outer periphery or the cylindrical wall 16 of the settling chamber 12.
		This flow pattern is generated in part by the orientation of the fluid inlet or conduit 26 such that it is tangential with respect to the periphery of the cylindrical settling tank 12 and further in part by the provision of the paddles 40 attached to the rotating shaft 36.
	www.freepatentsonline.com /4519907.html (2798 words)

	Picket Fence Design Solid Settling Basin (Site not responding. Last check: 2007-09-14)
		In these operations minimum requirements for runoff control are solid settling facilities with filter strips for handling the liquids that pass through the settling basin.
		The traditional solid settling basin involves a concrete wall with a stop log style structure that liquids pass through one segment of the wall.
		The picket fence solid settling basin is a wooden wall built perpendicular to the slope of a feed lot.
	www.p2pays.org /ref/21/20026.htm (861 words)

	Napoleon Waste Water Treatment Plant
		The mechanism is essentially a large mechanical rake, which drags the grit that settles out in the bottom of the channel, out of the channel and down the length of the basin and up the sloping end into a storage bin.
		In the primary settling tanks, solid particles in the sewage settle to the bottom and are swept into a sump by the tanks sweeps on the revolving mechanism.
		Settled sewage from the primary tanks then flows into the recirculation chamber were sewage is continuously pumped to the high rate trickling filters.
	www.napoleonohio.cc /water/wwtp.html (1435 words)

	Physical Treatment - Sedimentation (Site not responding. Last check: 2007-09-14)
		In practice, a settling column experiment is often used to determine the settling velocity of the different fractions of a suspension, along with the mass of sediment in each fraction.
		Most settling basins are designed to achieve a 5 to 10 minute residence time, which should settle 50 to 75% of the solids from open feedlot runoff.
		Practical Notes on Settling Basin Design were developed to complement that approach, and discuss conversion to metric units among other issues.
	www.abe.iastate.edu /Ae573_ast475/settling_basin_notes.htm (411 words)

	OCWD Online - WF21/Chemical Clarification
		Lime, at a dose of 375 to 500 mg/L, is added in slurry form into the rapid-mix basin as a primary coagulant and disinfectant (raising the pH to 11.3), and an anionic polymer, at a dose of 0.1 mg/L, is added as a settling aid in the third-stage flocculation basin.
		Water flows from the bottom of the third flocculation basin into a settling basin where it flows horizontally into the notched weirs of collection troughs.
		Approximate detention time in the clarification basin is 117 minutes: one minute for each of the two rapid-mix basins, 30 minutes in the flocculation basins and 85 minutes in the settling basins.
	www.ocwd.com /_html/wf21_02.htm (206 words)

	Aquaculture Certification Council, Inc. - Technical Information
		The size of a settling basin is based on the volume of water to be treated and the length of time the water must be held to effect treatment.
		Moreover, the settling basin must be large enough to maintain the design HRT during pond draining for harvest and provide reserve capacity of 1.5-2.0 times the volume necessary to treat water exchange and draining effluents.
		The percentage of total area necessary for a common settling basin would be proportionally less than that necessary for individual basins for each farm within a cluster.
	aquaculturecertification.org /tech-1.html (1750 words)

	© ASLA.org
		The island was occupied with typical water purification plants, such as a water-purification basin, clean water reservoir, concentrator and regulator, management facility, and the settling basin for chemicals.
		The settling basin for chemicals has become a garden for aquatic plants, which purifies water in nature.
		The settling basin for chemicals now holds various environments for plant growth, such as an aroma garden, a moss garden, and a fern garden.
	www.asla.org /awards/2004/04winners/entry557.html (443 words)

	News release information
		The settling basin is located between the shore arms of the two jetties in the outer harbor, is generally rectangular in area, approximately 6 acres, and has an authorized depth of 8 feet.
		Only the entrance channel and the settling basin, and not the entire Federal navigation project, will be dredged at this time since these features are more critical for navigation safety.
		The 8-foot settling basin continues to shoal so that about three-quarters of it is above the authorized depth of –8 feet mean lower low water, and about 20 percent of the settling basin has shoaled above MLLW.
	www.nae.usace.army.mil /news/2004-32.htm (914 words)

	[No title] (Site not responding. Last check: 2007-09-14)
		Methods such as screened settling zones in the downstream end at raceways shall be used to collect settleable solids prior to periodic removal to off-line settling basins.
		(ii) The settling basin shall be designed to minimize short-circuiting and to provide a minimum total suspended solids average monthly percent removal of 85% and an average monthly settleable solids percent removal of 90%.
		(ii) The settling basin shall be designed to provide at least a twenty year sludge decomposition and storage capacity unless provisions are made for periodic sludge removal without interruption in treatment.
	www.leg.wa.gov /WAC/index.cfm?section=173-221A-100&fuseaction=section (2067 words)

	REM (Site not responding. Last check: 2007-09-14)
		A water treatment plant consists of a flocculation tank, a settling basin, and a filtration unit.
		The purpose of the settling basin is to reduce the suspended solids concentration before filtration.
		Assume that the suspended solids concentration in the inflow to the settling basin is 25 mg/L and the settling velocity of the solids, v
	www.calstatela.edu /faculty/ckhachi/ce384/ce384_f03_hw2.htm (605 words)

	GERMAN - Online Information article about GERMAN (Site not responding. Last check: 2007-09-14)
		The third class belongs to the Bantu-Negro stock, and came from the north-east, expelling and enslaving the mountain Damara, and settling in various parts of the country under different names.
		BASIN, or BASON (the older form bacin is found in many of the Romanic languages, from the Late Lat.
		basin of the Ovampo, while the dunes and sand-tracts of the Kalahari occupy the eastern regions.
	encyclopedia.jrank.org /GEO_GNU/GERMAN.html (5479 words)

	lepp-dp-assenfactsh-050304 (Site not responding. Last check: 2007-09-14)
		The draft Permit to Install also covers the installation of a concrete sand settling basin, with a capacity of 2.4 million gallons, and an earthen manure storage pond, with a storage capacity of 20 million gallons.
		All the manure from the existing freestall barn would continue to be flushed to the existing sand settling basin and existing manure storage pond.
		The manure from the new freestall barn would be flushed to the new sand settling basin and then be pumped to the new manure storage pond.
	www.ohioagriculture.gov /lepp/curr/drft/lepp-dp-assenfactsh-050304.htm (1304 words)

	USDA Agricultural Research Service (Site not responding. Last check: 2007-09-14)
		settling basins do a reasonable job of settling most solids but many still pass through.
		In addition, the effluent from the settling basin is very “hot” and kills the vegetation in the filter strip.
		We need to know how big settling basins should be, how filter strips/areas should be design to be most effective.
	www.ars.usda.gov /pmt/needs.for.web/288.htm (367 words)

	Swine Manure Solids Earthen Settling Basin Design EBAE 184-93 (Site not responding. Last check: 2007-09-14)
		An earthen gravity settling basin can remove 50% or more of the solids from liquid swine manure while providing solids storage for up to 12 months between cleanouts.
		The basin top width should be no more than 100 feet with a length-to-width ratio near 3:1 and a liquid depth of 8-10 feet.
		The basin contents should be thoroughly agitated and removed for land spreading either by liquid manure spreader or slurry irrigation.
	www.bae.ncsu.edu /programs/extension/publicat/wqwm/ebae184_93.html (282 words)

	iplectures
		Sedimentation is the process in which the velocity of the flowing water is reduced so as to permit the suspended matter to settle out under the influence of gravity.
		A discrete particle maintains its individuality and characteristic settling velocity thoughout the period of settling and hence settles at a constant rate with respect to the fluid.
		Efficiency of settling basin as a sole function of settling velocity of particles and surface loading (or surface area of basin)
	www.savstate.edu /scitech/engtech/jay/eeslided10.htm (160 words)

	Settling
		Settling velocity or fall velocity or terminal velocity (ws) of a (sediment) particle is the at which the sediment settles in still fluid.
		Stoke's Law predicts the settling velocity of a small sphere in a fluid.
		The fluid may be air or water, and the law finds many applications in the natural sciences.
	www.brainyencyclopedia.com /encyclopedia/s/se/settling.html (222 words)

	Ammonia accumulation in settling basin liquids - Odor and Nutrient Management Newsletter
		The inability to maintain grass directly below settling basin outlets is also thought to be a result of high ammonia concentrations.
		Ammonia concentrations are believed to increase with time in undrained settling basins, but little data exists on how quickly the ammonia accumulates.
		It is important to dewater settling basins as quickly after rainfall as possible, before the conversion to ammonia occurs.
	www.exnet.iastate.edu /Pages/communications/EPC/Winter03/ammonia.html (787 words)

Try your search on: Qwika (all wikis)