scholarly journals Solids Removal Efficiency of a Sedimentation Tank in a Peri-Urban Catchment

2020 ◽  
Vol 12 (17) ◽  
pp. 7196 ◽  
Author(s):  
Salvatore Falco ◽  
Giuseppe Brunetti ◽  
Giovanna Grossi ◽  
Mario Maiolo ◽  
Michele Turco ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Surface Runoff ◽  
Suspended Solids ◽  
Southern Italy ◽  
Treatment Efficiency ◽  
Urban Catchment ◽  
Sedimentation Tank ◽  
Basin Surface ◽  
Different Grain Size ◽  
Solids Removal

At the outlet of the Vermicelli catchment—a peri-urban area located in the campus of University of Calabria (Cosenza, Southern Italy)—a sedimentation tank is located, aiming at collecting the basin surface runoff and improve its quality. First, experimental results of the treatment effects are here presented and analyzed. In addition, a monitoring campaign was conducted in order to characterize the particles transported by surface runoff and to determine the treatment efficiency of the tank. The analysis showed the presence of a pollutant load in the surface runoff of the Vermicelli basin and provided information on its particle-size distribution (PSD). Results were considered in terms of the treatment efficiency of the sedimentation tank, showing a good overall removal efficiency value, together with a high variability of the removal sedimentation efficiency. This variability is mainly due to the different grain size of the suspended solids and the characteristics of the rainfall event.

scholarly journals Analysis of suspended solids and Glyphosate and efficacy of the cross-compliance standard 5.2 ‘buffer strips’ in the protection of superficial water from suspended solids in runoff conveyed through a vineyard

2015 ◽  
Vol 10 (1s) ◽  
Author(s):  
Bruno Boz ◽  
Giuseppina Pipitone ◽  
Bruna Gumiero ◽  
Paolo Bazzoffi ◽  
Luigi Sansone
Keyword(s):  
Surface Runoff ◽  
Suspended Solids ◽  
Buffer Zone ◽  
Annual Rainfall ◽  
Buffer Strips ◽  
Monitoring Study ◽  
Herbaceous Buffer ◽  
Solids Removal ◽  
Cross Compliance

Several studies have described the effectiveness of vegetated buffer strips, interposed between the cultivated areas and water bodies, in removal of suspended solids and other pollutants such as Glyphosate conveyed through surface runoff. This monitoring study has quantified the effects of a 5-metre wide herbaceous buffer zone, adjacent to a vineyard, built according to the Standard 5.2 of Cross-compliance (M.D. 27417). The amount of runoff generated was 3.9% of the total annual rainfall, with negligible differences in terms of volume after flowing through the buffer zone. The effectiveness of the buffer zone in suspended solids removal was, in terms of mass balance, of 45.5%. The glyphosate outputs from the vineyard, unlike in other experiences, were negligible and therefore it was not possible to evaluate the efficiency of the buffer zone in removing it. This is due to the low rainfall occurred in the period following distribution that has favoured <em>in situ</em> degradation of Glyphosate.

scholarly journals Physical Model Testing Of An Experimental Vortex Device For Controlling Total Suspended Solids In Stormwater

2021 ◽  
Author(s):  
Zihan Mi
Keyword(s):  
Flow Rate ◽  
Suspended Solids ◽  
Performance Testing ◽  
Oil Removal ◽  
Test Results ◽  
Treatment Efficiency ◽  
Compact Size ◽  
Treatment Technologies ◽  
Solids Removal ◽  
Regulatory Guideline

In highly urbanized area, lack of space limits the application of most stormwater quality treatment technologies. Oil/Grit Separators (OGSs) are preferred in these cases due to their compact size and reasonable solids removal efficiency. The objective of this research is to identify the challenges and practical potential solutions of solids treatment performance testing on a full-scaled experimental vortex device (EVD) adopting TRCA’s regulatory guideline titled the “Procedure for Laboratory Testing of Oil/Grit Separators” (referred to in this paper as the Procedure) which stipulates the standards of sediments and oil removal tests in Canada. The test results indicated that: (1) TSS treatment efficiency of EVD was observed to decline with the particle size and flow rate; and (2) the average overall TSS treatment efficiency decreased from 52% to 44% as the flow rate doubled.

scholarly journals Treatment of Al Doura Oil Refinery Wastewater Turbidity using Magnetic Flocculation

2019 ◽  
pp. 1-8
Author(s):  
Muzher Al doury ◽  
Hadeel Al samerrai
Keyword(s):  
Removal Efficiency ◽  
Suspended Solids ◽  
Suspended Solid ◽  
Operating Conditions ◽  
Oil Refinery ◽  
Refinery Wastewater ◽  
Turbidity Removal ◽  
Aluminum Sulphate ◽  
Solids Removal ◽  
Oil Refinery Wastewater

The use of conventional flocculants such as Aluminum sulphate (Alum) alone to treat the wastewater may be insufficient to get the required turbidity, suspended solids removal as well as it requires relatively a long residence time. Magnetic flocculation is one of the used techniques for increase the efficiency of the turbidity removal. In the present study, three sets of experiments are carried out in order to investigate the possibility of increasing the suspended solid removal efficiency from Al Doura oil refinery wastewater using iron oxide (Fe3O4), Nickel (Ni), and Cobalt (Co) ferromagnetic powders with alum. The following operating conditions namely, pH, alum dose, ferromagnetic powder dose, and initial turbidity are studied. The results revealed that an improvement in turbidity removal efficiency is satisfied, as well as, a reasonable reduction in the sedimentation period is achieved. The highest turbidity removal is 99.88% that obtained for 122NTU sample for alum dose 120 mg/L+ Nickel dose of 80mg/L and pH of 6.5.

Test operation of a FOPS®-S filter separator in the process of surface runoff purification from the car parking area

2021 ◽  
pp. 38-45
Author(s):  
М.А. Греков ◽  
С.В. Елагин ◽  
Г.Л. Козинец ◽  
Л.В. Леонов ◽  
А.В. Чечевичкин ◽  
...  
Keyword(s):  
Surface Runoff ◽  
Maximum Concentration ◽  
Suspended Solids ◽  
Metropolitan Areas ◽  
Oil Products ◽  
Treatment Efficiency ◽  
Sewer System ◽  
Test Operation ◽  
Negative Temperatures ◽  
High Concentrations

Поверхностный сток с территорий крупных мегаполисов интенсивно загрязняется. Особую роль в загрязнении играют автопарковки, на территории которых формируются сточные воды с высокими концентрациями нефтепродуктов и взвешенных веществ. Целью работы была тестовая многосезонная эксплуатация фильтра-сепаратора ФОПС®-С при очистке поверхностного стока, поступающего в систему канализации с территории автопарковки. В ходе наблюдений установлено, что на протяжении 21 месяца испытаний фильтр ФОПС®-С обеспечивал эффективность очистки сильнозагрязненного поверхностного стока от взвешенных веществ 82–99% и нефтепродуктов 55–76% (при их максимальной концентрации в стоке 3000 и 10,5 мг/дм3 соответственно). Снижения эффективности очистки в течение 21 месяца не наблюдалось, в том числе в периоды отрицательных температур (два сезона). За время испытаний из фильтра ФОПС®-С дважды производилась гидровыгрузка задержанных загрязнений: взвешенных веществ (~ 130 кг) и нефтепродуктов (~ 2,1 дм3). Surface runoff from large metropolitan areas is heavily polluted. Car parking areas are of overriding concern in pollution since the surface runoff generated on them contains high concentrations of oil products and suspended solids. The aim of the project was multi-season test operation of a FOPS®-S filter-separator for the purification of the surface runoff disposed into the sewer system from the parking area. In the course of observations, it was found that over 21 months of testing, the FOPS®-S filter provided for removing 82–99% suspended solids and 55–76% of oil products from heavily contaminated surface runoff (at their maximum concentration in the surface runoff 3000 and 10.5 mg/dm3, respectively). No decrease in the treatment efficiency was observed for 21 months, including the periods of negative temperatures (two seasons). During the tests the hydraulic discharge of the trapped pollutants from the FOPS®-S filter was carried out twice: suspended solids (~ 130 kg) and oil products (~ 2.1 dm3).

scholarly journals Poultry Slaughterhouse Wastewater Treatment Using Submerged Fibers in an Attached Growth Sequential Batch Reactor

2018 ◽  
Vol 15 (8) ◽  
pp. 1734 ◽  
Author(s):  
Hamidi Aziz ◽  
Nur Puat ◽  
Motasem Alazaiza ◽  
Yung-Tse Hung
Keyword(s):  
Removal Efficiency ◽  
Suspended Solids ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Treatment Efficiency ◽  
Slaughterhouse Wastewater ◽  
Sequential Batch Reactor ◽  
Treated Effluent ◽  
Different Types

In this study, a sequential batch reactor (SBR) with different types of fibers was employed for the treatment of poultry slaughterhouse wastewater. Three types of fibers, namely, juite fiber (JF), bio-fringe fiber (BF), and siliconised conjugated polyester fiber (SCPF), were used. Four SBR experiments were conducted, using the fibers in different reactors, while the fourth reactor used a combination of these fibers. The treatment efficiency of the different reactors with and without fibers on biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammonia-nitrogen (NH3-N), phosphorus (P), nitrite (NO2), nitrate (NO3), total suspended solids (TSS), and oil-grease were evaluated. The removal efficiency for the reactors with fibers was higher than that of the reactor without fibers for all pollutants. The treated effluent had 40 mg/L BOD5 and 45 mg/L COD with an average removal efficiency of 96% and 93%, respectively, which meet the discharge limits stated in the Environmental Quality Act in Malaysia.

scholarly journals Physicochemical and electrocoagulation treatment of wastewater from a cardboard packaging company

2020 ◽  
pp. 1-8
Author(s):  
Blanca Viviana Olvera-Valadez / ◽  
Martha Betzabé Murillo-Hernández ◽  
Javier Páramo-Vargas
Keyword(s):  
Removal Efficiency ◽  
Suspended Solids ◽  
Combined Treatment ◽  
Operating Costs ◽  
Optimal Conditions ◽  
Treatment Efficiency ◽  
Physicochemical Treatment ◽  
Permissible Limits ◽  
A Company

The diagnostics of the physicochemical treatment and electrocoagulation plant of the cardboard packaging company showed that currently, the wastewater has a COD of 18,000 mg/L and suspended solids of 2425 mg/L, therefore, it does not comply with the maximum permissible limits stipulated in nom-001-semarnat-1996. It was found that the physicochemical treatment has a removal efficiency of 33% for COD and 58% of total solids; while the electrocoagulation stage has a negligible effect. In the physicochemical treatment tests, a removal of 92% of the COD was obtained and in the treatment by electrocoagulation, a removal of 37.5% of the residual COD from the previous stage was achieved. This information shows that both treatments can be viable alone or in combination. Objectives: Evaluate the physicochemical treatment and electrocoagulation of wastewater of a company that produces cardboard packaging. Methodology: 1. Develop characterization of wastewater, 2. Develop treatability tests through physicochemical treatment, 3. Develop treatability tests by electrocoagulation treatment, 3. Analyze results. Contribution: This project allowed to know the efficiencies of COD removal, which can be had with the physicochemical treatment, with the treatment by electrocoagulation and with the combined treatment; as well as their optimal conditions in each case. This made it possible to generate operating proposals, which allow reducing operating costs and increasing treatment efficiency.

Hybrid filtration method for pre-treatment of stormwater

2010 ◽  
Vol 62 (12) ◽  
pp. 2937-2943 ◽  
Author(s):  
M. A. H. Johir ◽  
S. Vigneswaran ◽  
J. Kandasamy
Keyword(s):  
Removal Efficiency ◽  
Suspended Solids ◽  
Hybrid Filter ◽  
Filtration Method ◽  
Zinc Removal ◽  
Filtration System ◽  
Lead Zinc ◽  
Pre Treatment ◽  
Modified Fouling Index ◽  
Solids Removal

In this study the hybrid filtration process (combining fibre filter with deep bed dual media filtration) was investigated as pre-treatment to stormwater. This process was investigated in-terms of reduction in turbidity, dissolved organic carbon (DOC), colour, headloss development across the filters, suspended solids removal, organic matter removal, nutrients and heavy matter (such as iron, copper, lead, zinc) removal efficiency. A comparison was made between the hybrid filter with single media (sand) deep bed filter and fibre filter. It was found that the hybrid filtration system successfully removed turbidity (98%), colour (99%), suspended solids (99%), and DOC (55%). The removal efficiency of heavy metal was relatively low as the concentration of heavy metals present in stormwater was low. The removal efficiency of nitrate, nitrite and phosphorous (as orthophosphate) was 27, 35 and 72% respectively. Hybrid filtration processes showed a better reduction of Modified Fouling Index (MFI) value (from 15.500 s/l2 to 9 s/l2) compared with single media sand, anthracite and fibre filter which were 35 s/l2, 13 s/l2and 14 s/l2 respectively when operated at FeCl3 dose of 15 mg/l.

Investigation of the Treatment of Wastewater Using Activated Sludge Process

2012 ◽  
Vol 260-261 ◽  
pp. 969-976
Author(s):  
Ayo Samuel Afolabi ◽  
Oluwagbenga Johnson ◽  
Ambali Saka Abdulkareem ◽  
Bada Samson Oluwaseyi
Keyword(s):  
Activated Sludge ◽  
Removal Efficiency ◽  
Maximum Concentration ◽  
Suspended Solids ◽  
Activated Sludge Process ◽  
Nutrients Removal ◽  
Low Concentration ◽  
Effective Application ◽  
Process Operation ◽  
Solids Removal

The treatment of wastewater with activated sludge process has been received with a great attention for decades. However, the effective application of this field is not as widely spread. In this study, the treatment of wastewater was investigated, and samples were collected and ascertained. The process operation was monitored and major observation and findings were noted. Consistent pH of 7.4 was almost maintained. High nutrients removal efficiency was sustained with low concentration of nitrates and phosphates in effluent wastewater. Suspended solids removal was satisfactory, although undesired spike of 19 mg/l and three undesired values beyond >15mg/l were measured. The micronutrient metals such as Al and Zn were found to be high with highest concentration of 113600 mg/kg and 940 mg/kg. The maximum concentration of 300 mg/kg and 332 mg/kg of Mn and Cr respectively were recorded.

scholarly journals Physical Model Testing Of An Experimental Vortex Device For Controlling Total Suspended Solids In Stormwater

2021 ◽  
Author(s):  
Zihan Mi
Keyword(s):  
Flow Rate ◽  
Suspended Solids ◽  
Performance Testing ◽  
Oil Removal ◽  
Test Results ◽  
Treatment Efficiency ◽  
Compact Size ◽  
Treatment Technologies ◽  
Solids Removal ◽  
Regulatory Guideline

In highly urbanized area, lack of space limits the application of most stormwater quality treatment technologies. Oil/Grit Separators (OGSs) are preferred in these cases due to their compact size and reasonable solids removal efficiency. The objective of this research is to identify the challenges and practical potential solutions of solids treatment performance testing on a full-scaled experimental vortex device (EVD) adopting TRCA’s regulatory guideline titled the “Procedure for Laboratory Testing of Oil/Grit Separators” (referred to in this paper as the Procedure) which stipulates the standards of sediments and oil removal tests in Canada. The test results indicated that: (1) TSS treatment efficiency of EVD was observed to decline with the particle size and flow rate; and (2) the average overall TSS treatment efficiency decreased from 52% to 44% as the flow rate doubled.

Sign in / Sign up

Export Citation Format

Share Document