Spent regenerant brine from ion-exchange technology for the removal of perchlorate and nitrate produces a high salt waste stream, which requires remediation before disposal. Bioremediation is an attractive treatment option. In this study, we enriched for salt tolerant bacteria from sediments from Cargill salt evaporation facility (California, USA), the Salton Sea (California, USA), and a high d...

the expansion of a microbial bank for the degradation of polycyclic aromatic hydrocarbons (pahs) is crucial for removal of these persistent pollutants. in this study, five gram-negative, aerobic, non-fermentative bacterial strains (iii-r3, iv-p11, iv-p13, iv-r13, and v-p18) were isolated from the activated sludge of a petrochemical wastewater treatment plant using enrichment pro­ tocol based on...

The effect of demycarosylturimycin H on bacterial growth, polypeptide synthesis and peptidyltransferase was studied. The effects are compared with those of intact turimycins acylated or deacylated in 4''-position of mycarose. The removal of the acyl group in 4''-position of mycarose leads to a total loss of inhibition of acceptor substrate binding while the removal of acyl mycarose moiety chang...

In this work it is describe for the first time, the use of an esterase with null activity (Tfu_0883 bacterial cutinase from Thermobifida fusca) on the removal of fat from the surface of a cotton substrate. Similar levels of fat removal were found for both null and wild-type proteins, despite that only wild type protein yielded fatty acids. Our results show that molecular recognition of esterase...

biodetoxification is considered as one of the method for eliminating of aflatoxins including aflatoxin m1 (afm1). in the present study, the ability of lactobacillus acidophilus (la-5) in reduction of afm1 in a simulated gastric model was studied. in this regard, two levels of bacterial suspension (3×109 and 3×1010 cfu/ml) were used to determine their ability to reduce three concentrations of af...

background: acute bacterial meningitis is among serious infections of the central nervous system (cns). the early diagnosis and empiric antibiotic treatments have led to a reduction in morbidity and mortality rates. pcr and the enzymatic digestion of 16s rdna fragment following the pcr by universal primers led up fast and sensitive determination. the aims of the present study was to improve our...

Waste Stabilisation Ponds (WSPs) are characterised by low phosphorus (P) removal capacity. Heterotrophic bacteria are principal microbial agents in WSPs in addition to algae. As treatment proceeds in WSPs, algal growth increases and pH rises, this has lead to believe that P removal is mainly through sedimentation as organic P algal biomass and precipitation as inorganic P. In activated sludge t...

Water scarcity, inappropriate sanitation and wastewater pollution are critically important global issues. Greywater is a sustainable water source for recycling, so this thesis examined simple, robust, low-cost alternatives for on-site treatment of greywater to irrigation water quality. Laboratory-scale pine bark, activated charcoal and sand filters were evaluated as regards their pollutant remo...