The trend towards reuse of effluent for land application of domestic and industrial wastewater is driven by the need to maximise limited water resources and benefit from the plant nutrients available in the effluent. Of significant impact upon the value of the wastewater for reuse is its chemical properties as well as biochemical oxygen demand and suspended solids. While the sewage treatment pl...

The toxicity and presence of heavy metals in wastewater pose environmental-disposal problems because of their non-biodegradability and persistence in the environment. Heavy metals in wastewater were removed by using physical, chemical and biological treatment. Biosorption is one of the biological treatments emerging as an alternative environmental friendly technology for the removal of metal io...

Constructed wetlands have gained much importance for treating domestic, industrial and agricultural wastes and are considered as an effective secondary or tertiary treatment method. The main characteristics affect the removal efficiency of constructed wetland are the vegetation type, hydraulic residence time and substrate. The aim of the present study is to examine effect of vegetation type on ...

The Three Gorges Project was implemented in 1994 to promote sustainable water resource use and development of the water environment in the Three Gorges Reservoir Area (hereafter "Reservoir Area"). However, massive discharge of wastewater along the river threatens these goals; therefore, this study employs a grey prediction model (GM) to predict the annual emissions of primary pollution sources,...

Treating endocrine disrupting compounds (EDC’s) in domestic wastewater has become a major concern for the safety of human health and the environment. Human derived EDC’s, such as 17βestradiol are present in domestic wastewater effluent at levels high enough to jeopardize normal endocrine functions of aquatic organisms leading to decreased fecundity and feminization. In wastewater treatment faci...

Stable nitritation is a critical bottleneck for achieving autotrophic nitrogen removal using the energy-saving mainstream deammonification process. Herein we report a new strategy to wash out both the Nitrospira sp. and Nitrobacter sp. from the treatment of domestic-strength wastewater. The strategy combines sludge treatment using free nitrous acid (FNA) with dissolved oxygen (DO) control in th...

Background/Need: The potential for groundwater contamination by fixed nitrogen forms originating from septic tank soil absorption systems is a widespread and growing concern. This concern is exacerbated by significant difficulties and uncertainties in predicting the transformations and fate of nitrogen in any given soil-based wastewater infiltration system. Monitoring to evaluate the extent to ...

This paper reports the results of an investigation into influence precipitation and air temperature on efficiency pollutant removal processes effluent concentrations in a one-stage constructed wetland with subsurface vertical flow. We studied on-site system that used Phragmites australis for treatment domestic wastewater. The was located central Europe, south-east Poland, temperate climate zone...

In synthetic wastewater, growth and phosphorus absorption by two species of microalgae, Chlorella sorokiniana and Chlorella vulgaris, and in domestic wastewater by C. sorokiniana significantly enhanced after a starvation period of 3 days in saline solution, combined with co-immobilization with the microalgae growth-promoting bacterium (MGPB) Azospirillum brasilense Cd in alginate beads. Starv i...