This paper provides evidence of the effects of urban wastewater discharges on the trophic state and environmental quality of a coastal water body in a semiarid subtropical region in the Gulf of California. The concentrations of dissolved inorganic nutrients and organic matter from urban wastewater primary treatment were estimated. La Salada Cove was the receiving water body and parameters measu...

A techno-economic analysis was performed for a 100 dry-ton/day (90,719 kg/day) fast pyrolysis transportable plant. Renewable Oil International® LLC provided the life cycle cost of operating a 100 dryton/day fast pyrolysis system using southern pine wood chips as feedstock. Since data was not available from an actual large-scale plant, the study examined data obtained from an actual 15 dry-ton/d...

A method for the quantitative determination of humanuse fluoroquinolone antibacterial agents (FQs) ciprofloxacin and norfloxacin in sewage sludge and sludge-treated soil samples was developed. The accelerated solvent extraction was optimized with regard to solvents and operational parameters, such as temperature, pressure, and extraction time. A 50 mM aqueous phosphoric acid/ acetonitrile mixtu...

This paper presents a comparison of dry anaerobic digestion reactors fed with differently sorted municipal organic solid wastes. One reactor was fed with source sorted organic wastes and a second reactor was fed with mixed organic wastes consisting of grey wastes, mechanically selected municipal solid wastes and sludge. The two reactors utilised the same process (Valorga) and operational condit...

The study aimed to assess the most efficient solution of raw material management in selected biogas plants into concept circular economy and evaluate due quality quantity feed final product obtained, which is biogas, as well at closed circulation (circular economy). evaluated two agricultural on a real scale one sewage treatment plant (in scale) northeastern Poland. A year-long showed that tech...

The degree of inactivation by UV irradiation was different between vegetative cells and spores of bacteria isolated from sewage sludge composting at 60 degrees C. By using this property, a method to estimate the spore ratio of a mixture of vegetative cells and spores was presented. This UV irradiation method was applied to the estimation of the spore ratio of sewage sludge compost samples colle...

The hypereutectic aluminium-silicon alloys AlSi25Cu4Cr and AlSi25Cu5Cr are heat treated T5, T6 T7. quenching of the was carried out under same conditions. Artificial aging at T5 a temperature 180º C for 2, 4 6h, 8, 10, 12 14h. artificial studied compositions T7 370º 20, 40 60 min. influence treatment on size, shape distribution primary eutectic silicon crystals in alloy structure investigated. ...

A large variety of different RNA species that are replicated by DNA-dependent RNA polymerase from bacteriophage T7 have been generated by incubating high concentrations of this enzyme with substrate for extended time periods. The products differed from sample to sample in molecular weight and sequence, their chain lengths ranging from 60 to 120. The mechanism of autocatalytic amplification of R...

This study was conducted to assess the effect of spice blends varying in salt and pepper concentrations on microbial quality Quanta: Ethiopian dried red meat. The experiment had seven treatments: 25% spices, salt, 50% (T1); 20% 55% (T2); 15% 60% (T3); 10% 65% (T4); 5% 70% (T5); 100% spices (without pepper), a positive control (T6); negative without any added ingredient (T7). Microbiological ana...