scholarly journals Peel Oil Recovery by Recycling Centrifuge Effluent

1979 ◽  
Author(s):  
Elizabeth S. Steger
Keyword(s):  
Waste Water ◽  
Organic Matter ◽  
Oil Recovery ◽  
Waste Treatment ◽  
Treatment Costs ◽  
Water Recycling ◽  
Recycling Techniques ◽  
Peel Oil

The pollution problems associated with the disposal of waste water, especially those high in organic matter, have drawn increasing attention in recent years. An increasing number of plants are developing various water recycling techniques in an effort to comply with EPA regulations and to reduce waste treatment costs. Paper published with permission.

Pre-Precipitation Facilitates Nitrogen Removal without Tank Expansion

1990 ◽  
Vol 22 (7-8) ◽  
pp. 85-92 ◽  
Author(s):  
Ingemar Karlsson ◽  
Gunnar Smith
Keyword(s):  
Waste Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Carbon Source ◽  
Nitrogen Removal ◽  
Waste Water Treatment ◽  
Chemical Precipitation ◽  
Sewage Water ◽  
Laboratory Studies ◽  
Denitrification Process

Chemically coagulated sewage water gives an effluent low in both suspended matter and organics. To use chemical precipitation as the first step in waste water treatment improves nitrification in the following biological stage. The precipitated sludge contains 75% of the organic matter in the sewage and can by hydrolysis be converted to readily degradable organic matter, which presents a valuable carbon source for the denitrification process. This paper will review experiences from full-scale applications as well as pilot-plant and laboratory studies.

Modelling waste output from trout farms

1995 ◽  
Vol 31 (10) ◽  
pp. 103-121
Author(s):  
J.-O. Frier ◽  
J. From ◽  
T. Larsen ◽  
G. Rasmussen
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Numerical Model ◽  
Organic Compounds ◽  
Waste Treatment ◽  
Waste Water Treatment ◽  
Nitrogen And Phosphorus ◽  
Waste Discharge ◽  
Scientific Background ◽  
Trout Farms

The aim of waste modelling in aquaculture is to provide tools for simulating input, transformation, output and subsidiary degradation in recipients of organic compounds, nitrogen, and phosphorus. The direct purpose of this modelling is to make it possible for caretakers and water authorities to calculate waste discharge from existing and planned aquaculture activities. A special purpose is simulating outcome of waste water treatment and altered feeding programmes. Different submodels must be applied for P, N, and organics, as well as for the different phases of food and waste treatment. Altogether this calls for an array of co-operating submodels for a sufficient coverage of the options. In all the required fields there is some scientific background for numerical model approaches, and some submodels have been proposed. Because of its multidisciplinary character a synthesized approach is still lacking. Within trout farming this work attempts to establish the different submodels and outlines future possibilities for synthesizing the knowledge to a numerical model.

scholarly journals Reducción de la carga orgánica de aguas residuales tóxicas de los laboratorios de la unas mediante oxidación avanzada Foto – Fenton

2018 ◽  
pp. 31-41
Keyword(s):  
Waste Water ◽  
Organic Matter ◽  
Soil Analysis ◽  
Organic Matter Content ◽  
Matter Content ◽  
Toxic Waste ◽  
Significant Variable ◽  
Total Phenols ◽  
La Selva ◽  
Biodegradable Organic Matter

Reducción de la carga orgánica de aguas residuales tóxicas de los laboratorios de la unas mediante oxidación avanzada Foto – Fenton Gian Marco Castillo Avila, José Antonio Blaz Matienzo Universidad Nacional Agraria de la Selva, Av. Universitaria Km. 1.5 s/n, Tingo María-Perú Resumen Se investigó la reducción de la materia orgánica contenida en aguas residuales tóxicas proveniente de siete laboratorios de la Universidad Nacional Agraria de la Selva (Química General e Inorgánica, Fitoquimica, Análisis de Suelos, Bioquímica, Microscopia y Sanidad Animal) mediante el proceso Foto-Fenton solar. Para optimizar el proceso, se utilizó la metodología de superficie de respuesta, estudiando el efecto de los factores dosis de H2O2 y Fe (II) sobre la variable respuesta porcentaje de remoción de DQO. Previo al tratamiento se caracterizó el agua residual (DQO 10551 mgO2/L, DBO5 850 mgO2/L, fenoles totales 1740mg/L, nitratos 83250 mg/L, sulfatos 104402 mg/L y pH 2.8) cuyas concentraciones superan ampliamente los valores máximos admisibles. La concentración de Fe (II) fue la variable significativa sobre la remoción de la DQO. Con la optimización del proceso, se alcanzó remover un 95.3% de DQO, 67.88% de DBO5, 100% de fenoles totales 91.12% de nitratos y 90.4% de sulfatos, reduciendo la concentración de los parámetros hasta valores de: 495 mgO2/L, 273 mgO2/L, 0.002mg/L, 7312 mg/L y 10031 mg/L, respectivamente, los cuales se encuentran por debajo de los Valores Máximos Admisibles. Se logró incrementar el índice de biodegradabilidad (DBO5/DQO), partiendo de 0.08 de contenido de materia orgánica difícilmente biodegradable, hasta un óptimo de 0.57 de contenido de materia orgánica parcialmente biodegradable. Con lo que se comprueba que el agua residual tratada es menos toxica que el agua residual inicial. Descriptores: Aguas residuales, Foto-Fenton, Valores máximos admisible, biodegradabilidad. Abstract The reduction of the organic matter content in toxic waste water from the seven laboratories at the Universidad Nacional Agraria de la Selva (General Chemistry and Inorganic, Phytochemistry, Soil Analysis, Biochemistry, Microscopy and Animal Health) through the solar photo-Fenton process was researched. To optimize the process, the response surface methods were used, studying the dosing factors of H2O2 and Fe (II) on the variable, percentage of removal response of DQO (acronym in Spanish). Before treatment, the waste water was characterized (DQO 10551 mgO2/L, DBO5 850 mgO2/L, total phenols 1740mg/L, nitrates 83250 mg/L, sulfates 104402 mg/L and pH 2.8); having concentrations which greatly surpassed the maximum allowable values. The concentration of Fe (II) was the significant variable for the removal of the DQO. With the optimization of the process, it was possible to remove a 95.3% of the DQO, 67.88% of the DBO5 (acronym in Spanish), 100% of the total phenols, 91.12% of the nitrates and 90.4% of the sulfates was achieved, reducing the concentration of the parameters to values of: 495 mgO2/L, 273 mgO2/L, 0.002mg/L, 7312 mg/L and 10031 mg/L, respectively, which come in under the maximum allowable values. An increase in the biodegradable index (DBO5/DQO) was achieved, having started with 0.08 difficult biodegradable organic matter content, reaching an optimal 0.57 partially biodegradable organic matter content. With which, it is proven that the treated waste water is less toxic than the initial waste water. Keywords: waste water, Foto-Fenton, Maximum admissible values, biodegradability.

The implications of point source phosphorus management to potable water treatment

1998 ◽  
Vol 37 (2) ◽  
pp. 343-350
Author(s):  
Ralph G. Heath ◽  
Machiel C. Steynberg ◽  
Rita Guglielmi ◽  
Annelie L. Maritz
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
South African ◽  
Water Intake ◽  
Waste Treatment ◽  
Waste Water Treatment ◽  
Algal Species ◽  
Raw Water ◽  
Urban Settlements ◽  
Informal Urban Settlements

The Vaal River Barrage reservoir is an important source of raw water for Rand Water which supplies at least 10 million people with drinking water daily. Return effluents from waste water treatment works, industries and informal urban settlements in the catchment has resulted in algal problems in the raw water and treatment process. In order to attempt to reduce the effect of eutrophication of South African inland water quality the Department of Water Affairs implemented in 1985 a 1 mg/l ortho-phosphate standard for waste water treatment works effluents. The amount of phosphate originating from the waste treatment works decreased significantly over the 10 years after the standard was implemented even though 40% of the time the works do not comply to the standard. This has resulted in no significant change in the chlorophyll values at Rand Water Intake No. 1. The algal species composition has changed with blue-greens becoming more dominant which has resulted in a higher incidence of algal related problems. The stabilizing of the chlorophyll values is not only as a result of lower ortho-phosphate levels but also due to residence times, turbidity and conductivity. To further reduce the algal concentrations at Rand Water Intake No. 1 the 1 mg/l ortho-phosphate standard will have to be enforced, the standard possibly reduced and diffuse sources managed on a catchment basis.

scholarly journals The Oil-Bearing Strata of Permian Deposits of the Ashal’cha Oil Field Depending on the Content, Composition, and Thermal Effects of Organic Matter Oxidation in the Rocks

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-19 ◽  
Author(s):  
Galina P. Kayukova ◽  
Anastasiya N. Mikhailova ◽  
Igor P. Kosachev ◽  
Dmitry A. Emelyanov ◽  
Mikhail A. Varfolomeev ◽  
...  
Keyword(s):  
Organic Matter ◽  
Thermal Effect ◽  
Mineral Composition ◽  
Oil Recovery ◽  
Thermal Effects ◽  
Total Content ◽  
Hydrocarbon Composition ◽  
Oil Field ◽  
Scanning Calorimetry ◽  
Organic Matter Oxidation

The features of the oil-bearing capacity of the productive strata of Permian deposits in the interval of 117.5-188.6 m along the section of individual wells of the Ashal’cha field of heavy superviscous oil (Tatarstan) were revealed depending on the content, composition, and thermal effects of organic matter (OM) oxidation in the rocks. It is shown that the rocks are very heterogeneous in their mineral composition and in the content of both free hydrocarbons by extraction with organic solvents and insoluble OM closely associated with the rock. The total content of OM in rocks varies from 1.72 to 9.12%. The features of group and hydrocarbon composition of extracts from rocks are revealed depending on their mineral composition and the content of organic matter in them. According to the molecular mass distribution of alkanes of normal and isoprenoid structure, extracts from rocks are differentiated according to three chemical types of oil: type A1, in which n-alkanes of composition C14 and above are present, and types A2 and B2, in which n-alkanes are destroyed to varying degrees by processes microbial destruction, which indicates a different intensity of biochemical processes in productive strata of Permian sediments. These processes lead to a decrease in the amount of OM in the rocks and an increase in the content of resins and asphaltenes in the oil extracted from them, as well as an increase in the viscosity of the oil. Using the method of differential scanning calorimetry of high pressure, it was found that the studied rock samples differ from each other in quantitative characteristics of exothermic effects in both low-temperature (LTO) 200-350°С and high-temperature (HTO) 350-600°С zones of OM oxidation. The total thermal effect of destruction processes of OM depends on the content of OM in the rocks and its composition. The research results show that when heavy oil is extracted using thermal technologies, the Permian productive strata with both low and high OM contents will be involved in the development, and the general thermal effect of the oxidation of which will contribute to increased oil recovery.

scholarly journals Waste Water Treatment Costs in Poultry Rendering Plants in Georgia

1974 ◽  
Vol 6 (2) ◽  
pp. 65-71 ◽  
Author(s):  
Harold B. Jones ◽  
Waldon R. Kerns
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Treatment Costs ◽  
Agricultural Income ◽  
Poultry Products ◽  
Secondary Stage ◽  
Poultry Processing

Poultry products are an important source of agricultural income in Georgia and other southeastern states. Yet, the waste from poultry operations can lower water quality unless ways are found to reduce quantities discharged into streams and waterways. Present regulations require that all sewage discharged from processing and rendering plants have the equivalent of secondary stage treatment as defined by conventional biological standards [4]. More stringent regulations that would completely eliminate discharge of pollutants into waterways have been proposed [10]. Poultry processing and rendering plants must therefore adopt more advanced in-plant processes or private treatment systems or utilize public systems to achieve higher levels of waste water treatment in future years.

Sign in / Sign up

Export Citation Format

Share Document