a study was carried out in a strip of a river and in a nearby well in the rainy and dry seasons to assess the impact of tobacco waste disposal on the roadsides. there were significant seasonal variations in the concentration of nicotine being higher (p

activated sludge or extended aeration treatment involves a continous system where aerobic biological growths are mixed with waste water and then separated in a gravity clarifier. therefore, waste treatment system such as the activated sludge system depend on the activities of communities of living organism. in this study, an attempt was made on the indentification of the bacterial population in...

The textile industry is one of the industries that generate a high volume of waste water. Strong colour of the textile waste water is the most serious problem of the textile waste effluent. The disposal of these wastes into receiving water causes damage to the environment. With regard to their colour removal by conventional treatment methods lead to severe water pollution, thus developing cost ...

In the absence of recycling, water represents over 90% of the life-support consumables for a manned spacecraft. In addition, over 90% of the waste water generated can be classified as moderately or slightly contaminated (e.g. shower water, condensate from the air-conditioning system, etc.). The ability to recover potable water from moderately contaminated waste water hence enables significant s...

The bioremediation of industrial waste water by macroalgae is a sustainable and renewable approach to the treatment of waste water produced by multiple industries. However, few studies have tested the bioremediation of complex multi-element waste streams from coal-fired power stations by live algae. This study compares the ability of three species of green freshwater macroalgae from the genus O...

Diets based on molasses as the principle source of energy for cattle are well established (Preston and Willis 1974). However, the use of molasses as an energy source for sheep, particularly under drought conditions, has not been studied extensively. The main purpose of the studies reported here was to measure the intake and production of sheep given diets containing a high proportion of molasse...

A novel technique was adopted using wood waste as a new carrier for adsorption of invertase. The new method improved activity, pH and thermal stability of the immobilized invertase from Saccharomyces cerevisiae and was more resistant to washing out by concentrated salt solution (6M NaCl). This result encourages using sawdust as matrix for purification of invertase or may be for other enzymes. O...

Of ten mushroom cultures investigated, only Agaricus campestris, Boletus indecisus, and Tricholoma nudum were capable of growing in submerged culture in medium of vinasse with added salts. Higher fermentative efficiencies were found under these conditions than in medium containing molasses or waste sulfite liquor. A. campestris showed a better capacity to produce protein but, since B. indecisus...

The potential of using Effective Microorganisms (EM) to purify waste water, including that of a sewage system, for recycling purposes was evaluated. The studies were extended to examine the potential of using treated sewage sludge as a fertilizer in crop production. Long term application of EM reduced the adverse characteristics of waste water. The quality of the treated water was high, which i...