Numerous studies have reported the masculinization of freshwater wildlife exposed to androgens in polluted rivers. Microbial degradation is a crucial mechanism for eliminating steroid hormones from contaminated ecosystems. The aerobic degradation of testosterone was observed in various bacterial isolates. However, the ecophysiological relevance of androgen-degrading microorganisms in the enviro...

Human fecal matter contains a large number of viruses, and current bacterial indicators used for monitoring water quality do not correlate with the presence of pathogenic viruses. Adenoviruses and enteroviruses have often been used to identify fecal pollution in the environment; however, other viruses shed in fecal matter may more accurately detect fecal pollution. The purpose of this study was...

A study was completed to investigate temporal trends of organochlorine pesticides (OCPs; aldrin, chlordane, dieldrin, heptachlor, hexachlorbenzene, and DDT) and polychlorinated biphenyls (PCBs) in sewage sludge. Between 2004 and 2006 the concentration of OCPs and PCBs in Australian sewage sludge (n=829) was consistently <1000mugkg(-1) dry solids DS. Dieldrin, chlordane and DDE were detected in ...

Organic and inorganic contaminants in sewage sludge may cause their presence also in the by-products formed during gasification processes. Thus, this paper presents multidirectional chemical instrumental activation analyses of dried sewage sludge as well as both solid (ash, char coal) and liquid (tar) by-products formed during sewage gasification in a fixed bed reactor which was carried out to ...

Sewage treatment system is a complicated nonlinear system with multi-variables, chemical reaction, biological process and altered loads, hard to describe mathematically. Thus prediction of the effluent quality parameters of sewage treatment plant has being a challenge. In this paper we adopt fusion of two BP networks to predict sewage quality parameters with a popular process Cyclic Activated S...

The study of the ways harmful volatile substance formation in sewerage systems, as well a rapid and economical neutralization these substances by construction, mechanical, physical chemical, hydrodynamic other methods is an urgent task that contributes to protection humans environment from toxic pollutants. purpose presented studies evaluation effectiveness impact on substances, through applica...

Oil refineries and other industrial enterprises generate a large amount of sewage contaminated with petroleum products. Sewage must be treated before it can discharged into water body. treatment methods often do not allow reducing the content products to maximum allowable values. This is because microheterogenous system characterized by variable composition high stability. It thus important stu...

BACKGROUND Hepatitis A spreads by the fecal-oral route. We hypothesize that it is more common in Aboriginal communities because of poverty, crowded housing and inadequate or substandard water and sewage systems. METHODS We tabulated on-reserve cases reported to First Nations and Inuit Health Branch, Health Canada. We obtained information on community water supply, sewage disposal and mean pop...