sewage sludge Articles
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Ultrasonic impact on bacterial population in sewage sample
Nine samples of sewage sludge from different paper mills of New Delhi were treated with ultrasonic waves of two different frequencies, viz., 35 kHz and 130 kHz for different time periods (5, 10, 20 and 30 min). Treated sewage sludge was then evaluated with different parameters, viz., Chemical Oxygen Demand(COD), Biochemical Oxygen Demand (BOD), Total Nitrogen, Total Phosphorus, Total Ammonia and ...
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Determination of Perfluorinated Compounds (PFCs) in Soil and Sewage Sludge using the SpeedExtractor E-916
Perfluorinated Compounds (PFCs) are fluorocarbons used in many commercial and domestic applications. They make materials stain, oil, and water resistant. They are persitent pollutants and are therefore monitored worldwide. Twelve PFC congeners were extracted from soil and sewage sludge samples using the SpeedExtractor E-916 and an ASE 200 system (Dionex). The PFC congeners were analyzed by ...
By BUCHI
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Ultrasonic irradiation of activated industrial sludge
Sludge is a by-product of wastewater treatment and contains multitude of pollutants. In the present study, irradiation with ultrasound as treatment technique was carried out to treat complex effluent paper sludge, sugar sludge and sewage sludge samples from different industrial places. Wastewater samples were treated in ultrasonic bath at 25 kHz for different time periods of 5 min, 10 min, 20 min ...
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Concentrations of 61 Trace Elements in Sewage Sludge, Farmyard Manure, Mineral Fertiliser, Precipitation and in Oil and Crops
This report details the concentrations of over 60 elements in sewage sludge from 48 sewage treatment plants across Sweden; manure from pigs and cattle from 12 farms; the most common NPK and P fertilisers (2 of each sort); precipitation during one year from Gårdsjön in west Sweden; 25 topsoil and 25 subsoil samples from a variety of soil types; and 20 samples of winter wheat grains and 5 samples ...
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An interlaboratory comparison study for the determination of dialkyl phthalate esters in environmental and biological samples
A series of interlaboratory comparison exercises were conducted to assess the accuracy of dialkyl phthalate ester (DPE) concentration measurements in environmental and biological samples. Five laboratories participated in analyses to determine DPE concentrations in standard test solutions; marine sediments; three certified reference materials (CRMs), including CARP‐2 (fish muscle) and BCR‐07 ...
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Factors affecting decay of
Salmonella Birkenhead and coliphage MS2 during mesophilic anaerobic digestion and air drying of sewage sludgeFactors affecting the decay of Salmonella Birkenhead and coliphage, as representatives of bacterial and viral pathogens, respectively, during mesophilic anaerobic digestion (MAD) and air drying treatment of anaerobically digested sewage sludge were investigated. Controlled concentrations of S. Birkenhead were inoculated into non-sterile, autoclaved, γ-irradiated and nutrient-supplemented ...
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Microbial safety of air-dried and rewetted biosolids
To assess microbial safety of treated sewage sludge (biosolids), we examined the inactivation of microbial indicators for potential bacterial, viral and protozoan pathogens. The levels of indicators were determined throughout the air-drying and storage phases of anaerobically digested sewage sludge. Samples were collected from two wastewater treatment plants (WWTPs) in Victoria, Australia. ...
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Analysis of Sewage and Sewage Sludge by Simultaneous ICP Spectroscopy
In recent years, the development and expansion of sewage treatment facilities has resulted in increased amounts of sludge which is generated in the treatment process, and which has presented a problem due to processing of the sludge itself. Sludge is normally incinerated or solidified and then disposed of in landfills or recycled for use in construction materials such as concrete or fertilizer. ...
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Optimization of a microwave-assisted extraction procedure for the determination of selected alkyl, aryl, and halogenated phenols in sewage sludge and biosolids
A microwave-assisted extraction method for the determination of 15 alkyl, aryl, and halogenated phenols in sewage sludge and biosolids samples was developed and optimized. The effects of solvent, temperature, time, moisture content, acid, and number of extractions on the recovery of phenols were evaluated. Results indicated that extraction solvent had the greatest impact on the recovery of ...
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Using FIMS to determine mercury content in sewage sludge, sediment and soil samples
Tim Flow Injection Mercury System (FIMS) is a dedicated system that integrates flow injection mercury cold vapor generation with a very sensitive detector. The exceptional system stability and the long path measurement cell provide instrumental detection limits as low as 5 ng/L using a sample volume of 5(H) jxL. The improved sensitivity of the FIMS permits sample dilution, therefore reducing the ...
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