Research Abstracts

Intense treatment of feed water solves high demands on a demineralized water quality in the processes involving hot water/steam boilers. There are various demands on water quality parameters — its hardness, alkalinity, pH value, carbon dioxide and oxygen content, etc. — according to the type of boil

The study aimed to assess the effectiveness of meat industry wastewater treatment applying two hybrid systems of activated sludge and ultrafiltration in: (1) an aerobic bioreactor in combination with ultrafiltration and (2) a bioreactor equipped with separate denitrification and nitrification tanks

According to date from the literature, steroidal sex hormones are present in water environments in very low concentrations, about 1 ng/l (yet for organisms they are physiologically active). Estradiol and ethinylestradiol were also found in drinking water samples at concentrations of up to 2.1 ng/l a

Red wine contains many compounds which have a beneficial effect on human health. The aims of this study were to concentrate the valuable components of wine by nanofiltration, to describe the mathematical model of the permeate flux and to estimate the cost of the process. Laboratory-size equipment wi

Poly(vinyl chloride) membranes loaded with lipids in contact with a solution to be tasted (citric acid) were characterized by electrochemical impedance spectroscopy in a frequency range from 100 kHz to 0.1 Hz of AC signal. Positively charged electrode membranes (with benzylhexadecyldimethylammonium

The model discussed in a previous work for the simulation of a deaerator to remove the oxygen from seawater in desalination plants has been improved. The conservative character of that model has been revised on the basis of the experimental industrial experience of FISIA Italimpianti S.p.A. In parti

Nanofiltration is an effective technique in improving the organic matter removal from coagulated surface water, but the process should also be economically feasible and environmentally sustainable when applied. Cost and environmental impact of nanofiltration installed after conventional surface wate

A thermoeconomic analysis of a cogenerative system with steam bleedings produced starting from the thermal energy recovered in a municipal solid waste thermovalorization plant is presented. The authors assume that the bled steam is used to feed a seawater multi-stage flash (MSF) desalination plant.

Material performance and corrosion resistance in multistage flash (MSF) plants are considered among the most important drives and central issues in promoting the advancement of this technology. This study was aimed at testing materials of construction of high, medium, and low temperature stages of t

Humidified gas turbines (HGT) have been identified as a promising way of producing power. The use of the steaminjected gas turbine (STIG) HGT cycle in a combined power and water desalination system was analyzed using energy and exergy performance criteria. A brief description and rationale of the ba