Global ETD Search
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Showing 1 to 18 of 18 for “"Industrial wastewaters"”.
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Metals recovery from industrial wastewaters and metallic hydroxide sludges through microbial sulphate-reduction.
This paper describes how metals originate in industrial wastewaters from the mining and metal finishing industries. Treatment of wastewaters containing dissolved metals produces a metallic hydroxide sludge which has to be disposed of in an environmentally acceptable way. It is estimated that the …
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Evaluation of the microbial risks associated with duckweed cultivation on agro-industrial wastewaters
In Europe, the livestock sector is one of the biggest consumers of plant protein, with 70% being directed to pig and poultry feed alone. It is a challenge for the sector to meet this demand, resulting in a reliance on imported soy protein in several countries. Duckweed species are free floating …
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Tratamientos combinados físico-químicos y de oxidación para la depuración de aguas residuales de la industria corchera
… character pollution and for the purification of industrial wastewaters. The considerer treatments to be studied include physico-chemical processes and oxidation processes. The wastewaters to study are the residues of cork industries.
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The Effectiveness of Multiple Redox Treatment Strategies on the Treatability of a High Strength Industrial Wastewater
The treatability of a high strength industrial wastewater, 9,000 mg/L as chemical oxygen demand (COD), by three sequencing batch reactor (SBRs) systems operated under alternating redox environments: anaerobic/aerobic (ANA), anoxic/aerobic (ANX), and aerobic was investigated. A synthetic wastewater …
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Evaluating the Source-Effect Relationship of Industrial Toxins in Wastewater Treatment
… the source of upset events at a regional industrial wastewater treatment plant (WWTP). Part two of this study determined the process performance effects of two chemical shocks, cyanide (zinc-cyanide complex) and pH, on nitrifying and non-nitrifying activated sludge. A modified …
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Local marine wastewater discharges : characterisation and impacts
Raw municipal wastewaters from the three major sewage pumping stations in the Maltese Islands were sampled three times daily over a 7-day period in August-September 2002 so as to identify levels of suspended matter, nutrients (nitrates, nitrites, orthophosphates and total phosphorus), and …
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Combined Anaerobic/Aerobic Treatment for Municipal Wastewater
… has been shown feasible, especially for industrial wastewaters with high concentration of organics. However, the utilization of this type of technology for treating wastewaters with low content of organic matter, such as domestic sewage is quite recent, and very limited information is …
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GENOMIC AND PHYSIOLOGICAL INSIGHTS INTO BACTERIAL HEAVY METAL RESISTANCE MECHANISMS FOR ENVIRONMENTAL DECONTAMINATION
… the role of tightly bound EPS in Cu removal from industrial wastewaters; (2) Genome sequencing and transcriptomic analysis of Rhodococcus erythropolis strain SC26 provide insights into its Cr(VI) reduction pathways; (3) Characterization of Cd resistance and plant growth-promoting (PGP) bacteria …
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Effect of mean cell residence time on the base hydrolytic assist activated sludge process
Treatment of municipal and industrial wastewaters results in the production of wastes in the form of sludge. Since the quantity and characteristics of sludge depend upon the degree of treatment, the upgrading of treatment facilities has had the effect of increasing sludge production. Since the …
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Permeability reduction in porous media due to suspended particles
… available, reclaimed agricultural, municipal and industrial wastewaters appear to be the water of choice for injecting into the underground reservoir. Frequently, the recharge capacity of wells decreases with time due to reductions in hydraulic conductivity of the aquifer material by suspended …
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Variations in the Oxidative Rates of Nitrosomonas europaea in Coke-Plant Activated Sludge.
The indiscriminate discharge of industrial wastewaters such as those containing high levels of ammonia, has resulted in toxicity to animal and human life and in eutrophication of receiving streams. Stringent government regulations now limit effluent volumes of affected industries. The destructive …
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Developing methods to access sensitive industrial wastewater information in South Africa (with treatment in mind)
… gaps in the characterisation and remediation of wastewaters in South Africa. Wastewater management can take advantage of wastewater as a valuable resource. However, treatment is required to recover this value, while characterisation is required to develop treatments. Yet wastewater …
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Development of carbon nanotube membranes for wastewater treatment and surface enhanced Raman scattering study of the membrane efficiency and eventual contamination caused
… (MBRs) are well established preferably in industrial wastewater treatment and were introduced aiming at the coupling of membrane separation properties simultaneously with a biochemical reaction. The solid-liquid separation that is conventionally carried out in gravity-based clarifier is …
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Engineered osmosis technology for desalination of oil and gas exploration wastewaters: assessment of membrane performance and process sustainability
… technology that can treat impaired water for industrial reuse is forward osmosis (FO). In FO, a highly concentrated draw solution imparts an osmotic pressure difference across a semipermeable membrane to extract water from impaired feed solutions. The use of FO has already shown many …
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Wastewater application to soils: hydraulic and nitrogen considerations
Land application of domestic and industrial wastewaters provides an effective means of recycling water and its components into the ecosystem. Successful treatment by soil requires that wastewater is applied in quantities that both maintain infiltrative capacity of the soil and do not exceed the …
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Using agricultural wastes to treat lead-contaminated water in Western Australia
… distributed in urban stormwater run-off and industrial wastewaters as a result of some mining operations, electronic assembly planting, battery manufacturing, and etching operations (Kadirvelu et al. 2001). Pb (II) is a heavy metal that causes significant damage in the human body. Drinking …
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USE OF MICROALGAE FOR WASTEWATER TREATMENT AND BIOFUEL PRODUCTION: EFFECTS OF ENVIRONMENTAL CONTAMINANTS ON THE CELLULAR RESPONSE
… presence of toxic contaminants in municipal or industrial wastewater could negatively affect the biomass growth and modify the pattern of lipid accumulation in algae cells. This research aims to evaluate the potential of cultivating microalgae in wastewater for the removal of selected …