The author presents a "state of the art" of the use of polymers
for better settling in domestic waste treatment and evaluates the
published research in the field.
Polymers have only recently been used to obtain better settling
in domestic waste treatment. Due to the number of polymer types
available...
The rotating flighted cylinder (RFC) was investigated
as a potential wastewater treatment deVice. A RFC is a
rigid tube with a helically-wound fin attached to the interior
surface and operates by flowing wastewater through
the tube as it rotates.
An 8-inch and 24-inch
diameter RFC was tested for
solids-liquid
separation,...
An evaluation of the service time of an activated carbon adsorption
column and the organic carbon removal efficiency treating activated
sludge process effluent was completed at aerator detention
times of three, five, and ten hours. Parameters used for evaluation
of treatment were biochemical oxygen demand, chemical oxygen
demand, total organic...
Several potential sorbent materials containing iron oxides were prepared and evaluated for potential to remove divalent metals from waste waters. These included a ferrihydrite-coated sand, maghemite incorporated in Dowex[Trademark] ion exchange resin, gothite and two thermally activated ferrihydrites. Attempts to prepare sorbents from steel shot by coating with ferrihydrite or...
Anaerobic digestion is a microbially mediated process by which organic matter is decomposed in the absence of oxygen. The end products of anaerobic digestion include treated sludge and biogas, a mixture of methane and carbon dioxide, which can be recovered and used for energy generation. The majority of wastewater treatment...
The colicidal efficiency of chlorine in both settled and unsettled
trickling filter effluent samples was determined by means of a series
of tests in which each sample was analyzed, at given time intervals,
for suspended solids, pH, residual chlorine (orthotolidine and
iodometric) and coliform count. A dye-tracer study, using Rhodamine...
The effluent from on-site sewage disposal systems has been
found to be a source of nitrates (NO
₃⁻
) in groundwater. Vegetation
has the ability to remove some of the nitrogen (N) from sewage
effluent as the solution moves through the soil around a disposal
trench, before it reaches groundwater....
This study evaluates the use and efficacy of biochar for treatment of source and nonpoint source pollutants in storm water. Biochar is the solid byproduct of incomplete combustion of biomass under low-oxygen and elevated temperature conditions (Keiluweit, 2010, Beesley and Dickinson, 2011, Bracmort, 2010). The source stock for tested biochar...
The primary objective of this study was to evaluate the rates of nitrate removal for a nitrate containing, low organic carbon wastewater interacting with four different carbon-containing solid substrates (alder woodchips, corn silage, manure and woodchip biochar). Batch systems were tested for nitrate removal, and systems with a combination of...