Research Abstracts

The mulch tower (MT) system described in Part I was tested to failure to determine its range of operating conditions. An increase in the influent temperature led to a statistically significant release of components of the chemical oxygen demand (COD) and the five day biochemical oxygen demand (BOD5)

A mulch tower (MT) system for greywater treatment is introduced in this paper. Materials used to assemble the MT system included mulch, coarse sand, fine and coarse gravel. Limited removal efficiency of the MT system was demonstrated for alkalinity, total hardness, pH, Cl–, PO3–, NH+, and SO2–, with

This work deals with the temperature effect on rejection of neutral and charged solutes by a nanofiltration membrane (Desal 5 DK of GE Osmonics). The experiments were conducted with a tangential Sepa CF cell with a flow velocity equal to 1.27 m/s. The pressure was varied form 5 to 15 bar and the tem

Arsenic poisoning in drinking water is a health issue in many Asian countries including Bangladesh, India, China and Vietnam. In areas where the drinking water supply contains unsafe levels of arsenic, technologies to remove arsenic are of prime importance. Many technologies have been developed for

Exergy analysis is a powerful tool to determine inefficiencies of a process and to evaluate the performance. The reverse osmosis (RO) plant of Al-Hussein thermal power station was analyzed thermodynamically using actual plant data. Exergy flow rates are evaluated throughout the plant. The rates of e

There is a strong need to improve the single slope solar still thermal performance and increase the production rate of distilled water. Different types of absorbing materials were used to examine their effect on the yield of solar stills. These absorbing materials are of two types: coated and uncoat

The process of organic dye removal from various water solutions containing organic dyes and inorganic additives by DC diaphragm discharge has been studied in he so-called “negative part” of this discharge. The concentration of treated dye decreased almost exponentially to constant residual value. Th

The photo-oxidation of Rhodamime B was carried out in the presence of H2O2 using UV light. The effects of dye concentration, pH, H2O2 dose and irradiation time were studied. These parameters strongly influenced the degradation of the dye. As expected, the increase of initial dye concentration decrea

Plasticized cellulose triacetate membranes with dinonylnaphthalenesulfonic acid (DNNS) as the ion carrier containing 2-nitrophenyl pentyl ether as the plasticizer were synthesized for competitive transport and sorption of Cs-137, Sr-90, and Co-60 radioisotopes from aqueous solutions of sodium nitrat

The nanophotocatalytic process using semiconductors with a nanostructure is one of the technologies used for the destructive oxidation of organic compounds such as dyes. The photocatalytic oxidation of Reactive Orange 16 aqueous solution applied in textile industries was assessed by UV ray irradiati