Settling classes for fine suspended particles

Brach-Papa, Christophe; Boyer, Patrick; Ternat, Fabien; Amielh, Muriel; Anselmet, Fabien

doi:10.1016/j.crme.2006.07.011

Cited by 8 publications

(6 citation statements)

References 8 publications

(8 reference statements)

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“…Earthen lots had an average particle density of 1.89 ± 0.11 g/cm 3 (average ± standard deviation) compared to 1.47 ± 0.17 g/cm 3 for concrete lots. The particle density of earthen lots in this study was comparable to the 1.95 ± 0.18 g/cm 3 found by Gilbertson and Nienaber (1973). Figure 3 shows the average particle densities for each of the six feedlots used in this study.…”

Section: Particle Densitysupporting

confidence: 81%

“…Gilbertson and Nienaber (1973) determined particle densities of solids in runoff effluent from a beef feedlot. They found the average particle density in feedlot runoff from an earthen lot to be 1.95 ± 0.18 g/cm 3 (average ± standard deviation). Their findings indicated as particle size decreased, particle density increased and volatile solids content decreased.…”

Section: Introductionmentioning

confidence: 99%

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Physical and Chemical Properties of Runoff from Beef Feedlots in Iowa

Pepple¹,

Andersen²,

Burns³

et al. 2010

International Symposium on Air Quality and Manure Management for Agriculture Conference Proceedings, 13-16 September 2010, Dall

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Beef feedlot runoff is a potential environmental contaminant. As such, its proper management is required to preserve water quality. Primary treatment of feedlot runoff often relies on sedimentation techniques, thus accurate knowledge of feedlot runoff physical properties is required. This study characterized the physical and chemical properties of runoff effluent from earthen and concrete beef feedlots in Iowa with the objective of providing the necessary information to improve solid settling basin design and performance. Study results indicated there was a difference between the settleability of runoff from earthen and concrete lots. Particle size distribution and particle density measurements indicated that the poorer settleability of concrete lot runoff was primarily caused by lower particle densities, 1.47±0.17 g/cm3 for concrete lots as compared to 1.89 ± 0.11 g/cm3 for earthen lots. Runoff composition was analyzed before and after settling to relate nutrient reduction to solids removal. Results indicate an average of 41 g-TKN/kg-TS and 16 g-TP/kg-TS removed by settling.

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Section: Particle Densitysupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Physical and Chemical Properties of Runoff from Beef Feedlots in Iowa

Pepple¹,

Andersen²,

Burns³

et al. 2010

International Symposium on Air Quality and Manure Management for Agriculture Conference Proceedings, 13-16 September 2010, Dall

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show abstract

“…1) to the total solids concentrations obtained in the 1 L cylinder settleability experiment for each sample as a function of time. Equation 1 was based on Brach-Papa et al (2006) and assumed that the removal of settleable solids follows a first-order decay process. Parameter values were estimated by performing a least squares regression to fit the nonlinear equation to the observed data:…”

Section: Methodsmentioning

confidence: 99%

Physical and Chemical Properties of Runoff Effluent from Beef Feedlots in Iowa

Pepple¹,

Andersen²,

Burns³

et al. 2011

Transactions of the ASABE

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Beef feedlot runoff is a potential environmental contaminant. As such, it should be managed properly to preserve water quality. Primary treatment of feedlot runoff often relies on sedimentation techniques; thus, accurate knowledge of feedlot runoff physical properties is required. This study characterized the physical and chemical properties of runoff effluent from earthen and concrete beef feedlots in Iowa with the objective of providing the necessary information to improve solid settling basin design and performance. Results, although not statistically significant (p = 0.11), indicated that solids in runoff from concrete lots tended to settle more slowly than solids from earthen lots. Particle size distribution and particle density measurements indicated that the poorer settleability of concrete lot runoff was primarily caused by lower particle densities: 1.47 ±0.17 g cm-3 (average ± SD) for concrete lots as compared to 1.89 ±0.11 g cm-3 for earthen lots. Runoff composition was analyzed before and after settling to relate nutrient reduction to solids removal. Results indicated an average of 41 g total Kjeldahl nitrogen per kg total solids and 16 g total phosphorus per kg total solids were removed during settling.

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“…Various studies have been undertaken on particle size, particle distribution and transport processes at surface and boundary layer mixing (Weilenmann et al ., ; Casamitjana and Schladow, ; MacIntyre et al ., ; Brach‐Papa et al ., ; Chung et al ., ; Gelda et al ., ; ). However, specific mechanisms occurring at times of low and high water temperature with an effect on particle transport following large and small events (due to the changes in snowmelt and seasonality of streamflow) in a large reservoir system are not well understood and require further investigation.…”

Section: Introductionmentioning

confidence: 98%

Modelling potential effects of climate change on winter turbidity loading in the Ashokan Reservoir, NY

Samal

Matonse

Mukundan

et al. 2013

Hydrological Processes

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Recent studies have indicated that potential future climate change may lead to changes in the timing and quantity of snowpack accumulation and winter (November to April) streamflow patterns including increased streamflow and turbidity in early winter and a slight reduction in turbidity loads at the time of traditional early spring run-off. In this study, we examine the potential effects of these predicted changes on reservoir turbidity levels. Our analysis focuses on Ashokan Reservoir, NY, which can at times receive significant watershed turbidity inputs mainly from stream channel erosion from the Esopus Creek. Both measured and simulated turbidity loads and climatology are input to CE-QUAL-W2 (W2), a reservoir turbidity transport model that can simulate reservoir turbidity and other water quality parameters. The W2 model is applied to estimate the effects of hydroclimatology on effective settling rates and turbidity transport as a result of differences in reservoir thermal structure during summer and winter events. Simulations suggest that the effective settling velocity is substantially lower at low temperatures during winter time. Winter average stream flow is simulated to increase by 12% and 20%, which leads to increases in reservoir turbidity by 11% and 17% for the future period 2046-2065 and 2081-2100, respectively. From a seasonal perspective, a change in timing of peak streamflow with increased flows during the winter and slightly reduced flows during early spring leads to increased average reservoir turbidity during winter and slightly decreased in-reservoir turbidity during early spring and summer.

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Settling classes for fine suspended particles

Cited by 8 publications

References 8 publications

Physical and Chemical Properties of Runoff from Beef Feedlots in Iowa

Physical and Chemical Properties of Runoff from Beef Feedlots in Iowa

Physical and Chemical Properties of Runoff Effluent from Beef Feedlots in Iowa

Modelling potential effects of climate change on winter turbidity loading in the Ashokan Reservoir, NY

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