The runoff of suspended solids and nutrients from land into the nation’s lakes and rivers can have severe impacts on the health of these systems and their uses. Highfrequency environmental data from sensors can provide insight into fundamental biogeochemical processes that dictate water quality and provide regulators with valuable knowledge on how to manage critical resources. The goal of this ...

hospital wastewater has special importance since having pathogens, radioactive materials, pharmaceutical wastes and heavy metals. removing them into environment without any treatment may cause serious problems for the public health. membrane biological reactor is the combination of the activated sludge and membrane filters. this research has investigated the performance of the nano-filtration i...

a bench scale aerobic sequencing batch reactor (sbr) was evaluated in terms of its potential to treat synthetic dairy wastewater. the 2-l plexiglass bioreactor was supplied with oxygen via a fine bubble air diffuser, fed with synthetic dairy wastewater under various operational conditions. to analyze the process, three significant independent variables — influent chemical oxygen demand (cod), m...

A model was developed for the fate of the natural estrogens estrone (E1) and estradiol (E2) in municipal sewage collection systems. Six municipalities throughout the Northern Hemisphere provided data to aide in the calculation of the biotransformation/degradation kinetics of the natural estrogens estrone (E1) and estradiol (E2) in wastewater collection systems. The mean pseudo-first-order kinet...

The performance of isolated designed consortia comprising Bacillus pumilus, Brevibacterium sp, and Pseudomonas aeruginosa for the treatment of sewage wastewater in terms of reduction in COD (chemical oxygen demand), BOD (biochemical oxygen demand) MLSS (mixed liquor suspended solids), and TSS (total suspended solids) was studied. Different parameters were optimized (inoculum size, agitation, an...

A novel fractionation method, based on both particle size and settling characteristics, was employed to examine metal distributions among five fractions. In-stream and stormwater runoff samples were collected from four land use types: highway, urban, agricultural (storm event and irrigation), and natural. Highway samples contained the highest dissolved concentrations for most metals, and freshw...

Reservoirs are manmade habitats, intermediate between rivers and lakes, presenting distinct hydrological and morphometric characteristics, with differential mean water residence time. They also present proper vertical and horizontal organisations, and their evolution depends on several variables acting on different special and temporal scales. The water quality evolution of the Itaipu Reservoir...

Anaerobic digestion is a promising technology for treating and disposing of oily sludge, but the presence oil in sludge reduces methane production volume reduction. To overcome this limitation, study creatively reports use magnetite to enhance mesophilic anaerobic elucidates underlying mechanism. Results show that addition increases production, with 5% content leading 1.42-fold increase cumulat...

In this research, an experimental study to evaluate nutrient removal from synthetic wastewater by a lab-scale moving bed biofilm process was investigated. Also, kinetic analysis of the process with regard to phosphorus and nitrogen removal was studied with different mathematical models. For nutrient removal, the moving bed biofilm process was applied in series with anaerobic, anoxic and aerobic...

Removal of heavy metals and suspended solids from shrimp culture wastewater in Bushehr Province, using cold ‎plasma technology