to evaluate the effect of chemical and bio-fertilizer on nitrogen, phosphorus and potash concentration, biochemical traits and calyxes yield of roselle, an experiment was conducted in the split plot based on randomized coplete block design with three replications, at the research station in zabol university, during 2013 and 2014. the main plot consisted of three levels: phosphorus, nitrogen and...

OBJECTIVE To investigate phosphorus limitation and its effect on the removal efficiency of organic matters in drinking water biological treatment. METHODS Bacterial growth potential (BGP) method and a pair of parallel pilot-scale biofilters were used for the two objectives, respectively. RESULTS The addition of phosphorus could substantially increase the BGPs of the water samples and the ef...

Phosphorus plays a critical role in cellular biology (5). Many cellular processes require phosphorus in one form or another and include nucleic acid synthesis and metabolism (37), energy metabolism (42, 46), cellular signaling (38), membrane integrity (53, 58), muscle function (10, 33), enzyme activity (74), lipid metabolism (25), and bone mineralization (30). Phosphorus is present in virtually...

The ever-expanding world-wide application of biological nutrient removal (BNR) technology is generating a greater appreciation for the performance of BNR processes under different operating conditions. This paper examines the effects of high process temperature on the biological phosphorus and nitrogen removal mechanisms and the sludge settling properties in BNR activated sludge processes. Thes...

rhizosphere has different chemical and biological properties from the bulk soil. information about phosphorus (p) availability in the rhizosphere soils treated with municipal sewage sludge (mss) is limited. therefore, the objectives of this research were to evaluate the rhizospheric effects of wheat (triticum aestivum l.) on phosphorus availability and biological properties in 10 calcareous soi...