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Showing 1 to 20 of 102 for “"Chemical oxygen demand (COD)"”.
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Manual and Automated Measurement of the Chemical Oxygen Demand (COD) of Wastewaters
… in the United Kingdom and the usefulness of oxygen demand tests to measure the organic pollution is outlined. Because oxyeen demand tests are arbitary the relative merits and shortcomings of the commonly used tests are discussed, as are some new techniques for measuring organic pollution.The …
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Stormwater Runoff from Elevated Highways: Prediction of COD from Field Measurements and TSS
… focused on the prediction and identification of chemical oxygen demand (COD) concentrations in storm water runoff from elevated roadways, which transports a significant load of contaminants. The objective of this research was to develop a mathematical model to relate COD concentration to …
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Analysis of temporal trends in southern Nevada wastewater pond parameters with an emphasis on ammonia removal
This paper examines physico-chemical and biological properties and processes in four Southern Nevada wastewater pond systems located in Alamo, Beatty, Blue Diamond, and Searchlight. Pond parameters examined include pond dimensions, hydraulic retention time (HRT), alkalinity, pH, chemical oxygen …
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Anaerobic treatment of a paper plant effluent
… waste paper. Effluent from the process has a Chemical Oxygen Demand (COD) concentration of approximately 4500 mg/l with a sulphate content of approximately 300 mg SO₄²⁻/l. The upflow anaerobic sludge bed (UASB) reactor was selected for the study. Important information derived from the …
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Effect of Solids Retention Time on Activated Sludge Properties and Effluent Quality
… resulted in an increase in effluent chemical oxygen demand (COD). The increase in effluent COD was not accompanied by a similar increase in effluent biological oxygen demand (BOD), indicating that the EMPs released were resistant to biodegradation. At the highest SRT, the resistance …
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Anaerobic co-digestion of municipal solid waste and sewage sludge.
… were evaluated: thermal, alkaline and thermochemical. Using a central composite experimental design, two factors were studied, the total solids content of the feed and its particle size. For all three pretreatments, second order empirical models were developed with respect to common …
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Eletro-oxidação de efluente contendo nitrogênio amoniacal na presença de cloreto
… ammoniacal nitrogen was higher than 90% and the Chemical Oxygen Demand (COD) higher than 80%, for both sells. These results indicated that tratament is efficient to reduce the concentration of inorganic and organic pollutants presents in the sample. The Ti/RuO2 anode presented better corrosion …
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The removal of organic waste matter from secondary sewage effluents by chemical coagulation
… operation. Removal was evaluated in terms of Chemical Oxygen Demand (COD) of the wastewater. It was found that, among the inorganic coagulants tested, ferric chloride was, in all cases, the most effective coagulant for COD removal. In general, the final COD achieved with ferric chloride was …
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Pilot-scale study on anaerobic/aerobic treatment of a textile dye wastewater
… for: color, total organic carbon (TOC), 5-day biochemical oxygen demand (BODs), chemical oxygen demand (COD), total phosphorus, sulfide, sulfate, total Kjeldahl nitrogen (TKN), ammonia, nitrate, chloride and oxidation-reduction potential (ORP). Nearly 50% color removal was observed during …
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Membrane Distillation for Leachate Treatment with Fenton Pre-Coagulation Treatment Process
… therefore, a proper usage of physicochemical treatments is required. In this study, membrane distillation (MD) has been used along with Fenton treatment process for pre-coagulation to achieve an effective removal of contaminants. MD is a technology derived with vapor pressure …
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Estudio comparativo de diferentes tecnologías de higienizacion de lodos de depuradora con fines para su reutilización
… Sólidos Totales Volátiles (STV) kg/m3 y 41.7 de Demanda Química de Oxigeno (DQO) Kg/m3 y un pH de 6.6, la duración de cada tiempo de retención hidráulica fue de 15, 15 y 15 días respectivamente. El contenido de Coliformes fecales presentes en el lodo crudo promedio fue 2.67 x 106 NMP/g y el …
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The Effect of Antecedent Dry Time on Water Quality Inflow and Outflow to Wet Ponds and Pollutant Removal Efficiency
… resulted in a significant increase of influent chemical oxygen demand (COD), nitrate+ nitrite (N023), volatile suspended solids (VSS), and total suspended solids (TSS), and effluent TSS. Additional research is necessary to determine if the engineering requirements used by the COA, and …
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Effectiveness of Wastewater Treatment for Selected Contaminants Using Constructed Wetlands in Mediterranean Climates
… solids (TSS) and organic matter: biological oxygen demand (BOD) and chemical oxygen demand (COD). Removal rates for pathogenic microorganisms and nutrients such as total Kjeldahl nitrogen and total phosphorous were variable among the case studies. Overall removal effectiveness was affected by …
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Inverse solid-liquid fluidization of aerogel granules and its application in removing oil from water
… is a very well known unit operation used in the chemical industry for various purposes. Inverse solid-liquid fluidization, where the solid particles to be fluidized are less dense than the fluid, is one of the several different kinds of fluidization being studied for its potential in industrial …
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A Review of Alternatives to Injection of Petroleum Wastewater from Oil and Gas Extraction
… With the predicted increase in global energy demands by 2030, to include increases in petroleum consumption and production up to 107 million barrels of crude oil per day; the negative environmental impact and freshwater dearth can also be expected to progressively worsen as petroleum refinery …
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Laboratory scale aerobic bioreactor conditioning of dairy processing wastewater as feedstock for Lemna minor production
… is a nutrient-rich resource, containing chemical oxygen demand (COD) ranging from 1,150 – 68,814 mg/L, nitrogen (N) from 14 – 1,462 mg/L and phosphorus (P) from 7.2 – 650 mg/L, depending on the product stream. This resource has potential to be utilised for cultivation of Lemna minor as a …
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Production, characterization, and applications of biochar from olive processing byproducts
… mill wastewater, measuring parameters including chemical oxygen demand (COD), total organic carbon (TOC), and total phosphorus. The lead adsorption efficiency of these biochar products was also assessed in lead nitrate solution, with kinetic models revealing adsorption mechanisms. Additionally, …
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Investigation of biological phosphorus removal for the treatment of a cellulose acetate manufacturing wastewater
… removal of carbonaceous material as measured by Chemical Oxygen Demand (COD) was attained, but BPR was not achieved. Other advantages of BPR and its anaerobic-aerobic sequencing were also monitored. While the loading on the aerobic zone was reduced 10 to 20% by the anaerobic zone, there was no …
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Application of Ozone in Dissolved Air Flotation (DAF) for Enhanced Removal of TOC and Suspended Solids in Pulp and Paper Wastewaters
… water quality parameters were used, especially chemical oxygen demand (COD), turbidity, and color. The most suitable coagulant and coagulant aid, aluminum chlorohydrate and cationic polymer NS 4700P respectively, were selected, and an effective bench-scale experimental procedure was established. …
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Experimental investigation of dark fermentation of poplar leaves for biohydrogen production
… of 0.76 mL/g. The results suggest that a biochemical reactor designed in this study effectively reduced the salinity of water and chemical oxygen demand (COD) of biomass by approximately 51% and 75%, respectively.
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