scholarly journals Assessment of Probability Distribution of Dissolved Oxygen Deficit

1988 ◽  
Vol 114 (6) ◽  
pp. 1421-1435 ◽  
Author(s):  
Yeou‐Koung Tung ◽  
Wade E. Hathhorn
Keyword(s):  
Probability Distribution ◽  
Dissolved Oxygen ◽  
Oxygen Deficit

Methods for studying dissolved oxygen levels in coastal and estuarine waters receiving combined sewer overflows

1995 ◽  
Vol 32 (2) ◽  
pp. 95-103
Author(s):  
José A. Revilla ◽  
Kalin N. Koev ◽  
Rafael Díaz ◽  
César Álvarez ◽  
Antonio Roldán
Keyword(s):  
Dissolved Oxygen ◽  
Coastal Waters ◽  
Computational Cost ◽  
Oxygen Deficit ◽  
Alternative Methods ◽  
Coastal Zones ◽  
Combined Sewer Overflows ◽  
Sewer Systems ◽  
Combined Sewer ◽  
High Computational Cost

One factor in determining the transport capacity of coastal interceptors in Combined Sewer Systems (CSS) is the reduction of Dissolved Oxygen (DO) in coastal waters originating from the overflows. The study of the evolution of DO in coastal zones is complex. The high computational cost of using mathematical models discriminates against the required probabilistic analysis being undertaken. Alternative methods, based on such mathematical modelling, employed in a limited number of cases, are therefore needed. In this paper two alternative methods are presented for the study of oxygen deficit resulting from overflows of CSS. In the first, statistical analyses focus on the causes of the deficit (the volume discharged). The second concentrates on the effects (the concentrations of oxygen in the sea). Both methods have been applied in a study of the coastal interceptor at Pasajes Estuary (Guipúzcoa, Spain) with similar results.

Use of the water quality index and dissolved oxygen deficit as simple indicators of watersheds pollution

2007 ◽  
Vol 7 (2) ◽  
pp. 315-328 ◽  
Author(s):  
Enrique Sánchez ◽  
Manuel F. Colmenarejo ◽  
Juan Vicente ◽  
Angel Rubio ◽  
María G. García ◽  
...  
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Quality Index ◽  
Quality Index ◽  
Oxygen Deficit

scholarly journals DAYA TAMPUNG SUNGAI REMBAGAN TERHADAP BEBAN PENCEMARAN MENGGUNAKAN METODE STREETER-PHELPS

2021 ◽  
Vol 10 (2) ◽  
pp. 209
Author(s):  
Sri Wahyuningsih ◽  
Elida Novita ◽  
Irfan Dwi Satya
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Agricultural Waste ◽  
Oxygen Deficit ◽  
Research Needs ◽  
Agricultural Activities ◽  
Class Iii ◽  
Pollution Load ◽  
Community Activities

Rembagan River is the main tributary of the Bedadung River in Cangkring Village, Patrang District, Jember Region. Various community activities in the Rembagan River area such as bathing, washing, defecating and urinating as well as agricultural activities will produce domestic and agricultural waste. These wast can cause river water pollution, especially water quality degradation. then the research needs to be done an analysis of the capacity of the Rembagan River in receiving pollution costs. The purpose of this study is to find out how much the ability of the Rembagan River to accept the burden of pollutants using the Streeter-Phelps method. Streeter-Phelps modeling takes into account two phenomena, namely the process of measuring dissolved oxygen (deoxygenation) and the process of increasing dissolved oxygen (reaeration). The results obtained from these calculations are oxygen drop curves determined on the basis of oxygen deficit values. The average values of deoxygenation rate and reoxygenation rate were sequentially 1.58931 mg/L/day and 10.09982 mg/L/day. So that self-purification can run well which means the water quality of the Rembagan River was still relatively good. This can be seen in the DO model pattern that goes up in each segment. The actual DO of 5.6760 mg / L was greater than the DO standard of class III quality of 3 mg / L. It can be interpreted that the Rembagan River still has a remaining DO of 2.676 mg / L and was still able to accept pollution cost of 18.8 kg/day. Keywords:  pollution load, Rembagan River, river capacity

scholarly journals Ozone Ice as an Oxygen Release Reagent for Heap Leaching of Gold Ore

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1251
Author(s):  
Ziyuan Liu ◽  
Jue Kou ◽  
Yi Xing ◽  
Chunbao Sun ◽  
Peng Liu ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Ozone Concentration ◽  
Heap Leaching ◽  
Oxygen Deficit ◽  
Leaching Rate ◽  
Oxygen Release ◽  
Ice Melting ◽  
Gold Leaching ◽  
Column Leaching ◽  
Rate Of Increase

The issue of poor aeration efficiency and low oxygen transfer in the heap leaching of gold has gained considerable attention. In this study, ozone ice was studied as an oxygen release reagent in the cyanide heap leaching of gold at a low temperature of approximately 5 °C, owing to its effective oxidation and clean and green properties. Quartz Crystal Microbalance with Dissipation (QCM-D) was used to monitor the effect of different ratios of cyanide and oxygen concentrations on the gold leaching rate. The results showed that the leaching rate doubled when the dissolved oxygen (DO) was increased from 8.2 mg/L to 12 mg/L at a relatively high cyanide concentration of 60 mg/L. The release of oxygen during the process of ozone ice melting was analyzed by simulating the oxygen-deficient condition of the ore heap in column leaching. In the first stage of ice melting, the DO in the solution increased dramatically, and the rate of increase improved with increased initial ozone concentration in the ice. In the second stage of ice melting, the rate of increase in the DO of the solution was not significantly affected by the initial ozone concentration in the ice; this was consistent with the decomposition rate of ozone. The addition of ozone ice containing 300 mg/L ozone increased the gold extraction by 4.1% in the ore column leaching experiment, compared to a column with no ozone ice. However, continuously increasing the ozone concentration up to 600 mg/L had no further significant effect, because the dissolved oxygen in the leaching solution reached saturation. The results facilitate a better understanding of the decomposition law of ozone in the melting process of ozone ice and help to improve the oxygen deficit state in gold leaching heaps.

scholarly journals Prediction of Dissolved Oxygen and Study of Engineered Nanoparticles to Improve Water Quality

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Kelly Chee ◽  
Richard Kyung
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Metal Ion ◽  
Arid Regions ◽  
Chemical Properties ◽  
Oxygen Demand ◽  
Biological Oxygen Demand ◽  
Engineered Nanoparticles ◽  
Oxygen Deficit ◽  
Water Quality Control

The lack of fresh water is one of the greatest challenges of our time. Increasing population and arid regions due to the temperature change limitthe use of clean water. In this paper, Streeter-Phelps equation was used tofind the levels of DO(Dissolved Oxygen) and the oxygen deficit which arethe main criteria for the water body quality. Reaeration constants and deoxygenation coefficients were used to find how the DO and BOD(Biological Oxygen Demand) of the water bodies converge to equilibrium. Somepollutants cannot be removed from water efficiently via traditional watertreatment. EDTA derivatives, owing to their engineered chemical properties, are also studied to be the potential metal ion chelator for enhancementof water quality. These molecules were tested for their thermodynamicstabilities, reactivities, and polarizations, and these characteristics are foundto be important factors in selecting the most suitable chelator for metal ionchelation which is used for water quality control.

Parametric Evaluation of a Dissolved Oxygen-Deficit Profile

2007 ◽  
Vol 24 (10) ◽  
pp. 1389-1398 ◽  
Author(s):  
Mehmet Berkun ◽  
Egemen Aras
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Deficit

Incorporation of oxygen contribution by plant roots into classical dissolved oxygen deficit model for a subsurface flow treatment wetland

2009 ◽  
Vol 59 (6) ◽  
pp. 1179-1184 ◽  
Author(s):  
Achintya N. Bezbaruah ◽  
Tian C. Zhang
Keyword(s):  
Dissolved Oxygen ◽  
Municipal Wastewater ◽  
Model Development ◽  
Subsurface Flow ◽  
Oxygen Demand ◽  
Oxygen Deficit ◽  
Model Parameters ◽  
Treatment Wetland ◽  
Deficit Model

It has been long established that plants play major roles in a treatment wetland. However, the role of plants has not been incorporated into wetland models. This study tries to incorporate wetland plants into a biochemical oxygen demand (BOD) model so that the relative contributions of the aerobic and anaerobic processes to meeting BOD can be quantitatively determined. The classical dissolved oxygen (DO) deficit model has been modified to simulate the DO curve for a field subsurface flow constructed wetland (SFCW) treating municipal wastewater. Sensitivities of model parameters have been analyzed. Based on the model it is predicted that in the SFCW under study about 64% BOD are degraded through aerobic routes and 36% is degraded anaerobically. While not exhaustive, this preliminary work should serve as a pointer for further research in wetland model development and to determine the values of some of the parameters used in the modified DO deficit and associated BOD model. It should be noted that nitrogen cycle and effects of temperature have not been addressed in these models for simplicity of model formulation. This paper should be read with this caveat in mind.

Sign in / Sign up

Export Citation Format

Share Document