The use of hydrodynamic vortex separators and screening systems to improve water quality

Andoh, Robert; Saul, Adrian J.

doi:10.2166/wst.2003.0248

Cited by 34 publications

(12 citation statements)

References 8 publications

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“…Obviously, it should be strong enough and shock-proof to withstand contact with seals. According to the literature (Andoh and Saul 2003), such circulation increases the area of the active flow zone in the reservoir and reduces dead zones. From the quantitative perspective, this effect was described in a dissertation by Gronowska-Szneler (2014).…”

Section: Proposed Improvement Of the Hydraulic Systemmentioning

confidence: 99%

Whirling System of Water Exchange in Breeding Pools

Matej

Pawliczka

Sawicki

et al. 2016

Archives of Hydro-Engineering and Environmental Mechanics

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To create proper living conditions for sea mammals kept in closed systems, one has to make sure that the characteristics of breeding pools, such as their shape, dimensions, the facing of the walls and bottom, as well as the quality and motion of water, resemble as closely as possible the natural environment of the animals. An appropriate system of water exchange plays a very important role here. A complete exchange of water is time-consuming, expensive and troublesome, so it can be performed only periodically and should be supported by a supplementary continuous exchange. This operation improves water quality and can create a proper velocity field in breeding pools. The breeding pools investigated in the present study are located in a sealarium in Hel (Poland), which belongs to the Institute of Oceanography of the Gdańsk University. Tracer measurements, carried out in these reservoirs made it possible to evaluate the intensity of continuous water exchange. It was found that this intensity was insufficient (as evidenced by large dead zones in the pools and short detention time), and therefore alterations to the existing system were proposed (i.e. a tangential position of the inlet and a centrally situated outlet). On the basis of a simplified model of circulative water flow, it was shown that the altered hydraulic system can considerably improve the situation.

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Section: Proposed Improvement Of the Hydraulic Systemmentioning

confidence: 99%

Whirling System of Water Exchange in Breeding Pools

Matej

Pawliczka

Sawicki

et al. 2016

Archives of Hydro-Engineering and Environmental Mechanics

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“…HDVS are known for their effectiveness as high-rate solids liquid separation devices (Andoh and Smisson, 1993;Andoh et al, 1996;Andoh and Saul, 2003;Bonner et al, 1993) and their use as effective contact vessels for the disinfection of CSOs has been demonstrated at full scale in Columbus, Georgia in the USA, where over 5 years of intensive monitoring has confirmed their efficacy as both high rate solids liquid separators and contact vessels for chemical disinfection of combined sewage (Turner et al, 2000;WERF 2003).…”

Section: Advanced Hydrodynamic Vortex Separator (Hdvs) Technologymentioning

confidence: 99%

Blue Infrastructure: The Confluence between Green and Grey Infrastructure in Integrated Urban Water Management

Andoh¹

2012

proc water environ fed

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There is recognition that to achieve the desired good ecological status of waters in most countries including the US and member states of the European Union, there is going to be the need to improve the quality of wet-weather induced discharges from urban catchments.The real challenge, however, particularly in the highly urbanized catchments, is that space is usually at a premium. So though the current trend towards "Green Infrastructure" (GI) is the direction to go in terms of more sustainable water management approaches and practices; in the "Urban Retrofit" context, the space requirements for GI are often such that they are not feasible solutions on their own. These space constraints particularly in ultra-urban catchments is resulting in a re-evaluation of the traditional Low Impact Development (LID) and Sustainable Urban Drainage Systems (SUDS) practices with an increasing recognition of the role that proprietary systems termed here "Blue Infrastructure" can (and have to) play in integrated urban water management.The paper describes case examples of the use of "Proprietary Systems" in the confluence of "Grey" and "Green" Infrastructure to provide cost effective solutions to problems of urban water management in a number of urban catchment contexts; with major cost savings being realized. Proprietary Systems are shown to facilitate the maximum use of existing infrastructure proving to be a "middle way" and the "bridge" between the traditional "Grey Infrastructure" and the emerging "Green Infrastructure". They are seen to be an essential part of the required comprehensive "Tool Box" of appropriate solution sets that can be tailored to suit site specific needs in integrated urban water management.

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“…Hydrocyclones are an important device for the separation of solid -liquid suspensions, they have been used extensively in many industries since designed originally (He et al 1999;Andoh & Saul 2003;Cullivan et al 2004). …”

Section: Introductionmentioning

confidence: 99%

Analysis of hydrocyclone behaviors in the separation of particulates from highway rainfall runoff

Qian

Kim

et al. 2010

Water Science and Technology

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In this study, the separation behaviors of particles in highway rainfall runoff using a Ø7.5 cm hydrocyclone were examined. The volume fraction and the total suspended solids concentrations in the overflow and underflow from the hydrocyclone were analyzed. The results indicated that the overflow volume fraction increased with increasing operational pressure, but decreased with decreasing ratio of underflow outlet to inlet sizes (D(u)/D(i)), while the underflow volume fraction showed contrary behavior. The TSS concentration ratio between the overflow and inflow (TSS(over)/TSS(in)) decreased as a function of the operational pressure, while the corresponding ratio of underflow to inflow (TSS(under)/TSS(in)) increased. There was no visible difference in the TSS(over)/TSS(in) ratio with increasing D(u)/D(i) ratio but the TSS(under)/TSS(in) decreased sharply. The particle removal efficiency was affected mainly by the particle size. The hydrocyclone can work well using 1.6 m natural water head, and it is more space saving and more efficient in the separation of fine particles than the sedimentation method.

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The use of hydrodynamic vortex separators and screening systems to improve water quality

Cited by 34 publications

References 8 publications

Whirling System of Water Exchange in Breeding Pools

Whirling System of Water Exchange in Breeding Pools

Blue Infrastructure: The Confluence between Green and Grey Infrastructure in Integrated Urban Water Management

Analysis of hydrocyclone behaviors in the separation of particulates from highway rainfall runoff

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