Showing papers on "Trickling filter published in 1973"

Waste water treatment system

Abstract: The invention represents a new concept in liquid processing particularly in sewage treatment utilizing air, oxygen or a carrier fluid with some liquid or gas disinfectant as an attenuator or anaerobic biota, for generalized disinfection, for aeration, or for oxygenation Essentially, unique designs and/or processes are incorporated into the conventional settling tanks associated with sewage treatment, as well as in the bioprocesses, activated sludge or trickling filter operations The structural improvements in settling reduce velocity, inhibit boundary layer separation and act to suppress mixing of the sewage to greatly enhance solid and fluid separation, while the bioprocessing operations, the key is to improve efficiency of the liquid-gas exchange whereby much better oxygen contact is achieved The liquid-gas exchange feature utilizes a high momentum exchange under turbulent flow conditions in a hydraulic pressure gradient to achieve intimate mixing of the desired gas in the fluid so as to achieve the desired very reliably and efficient liquid-gas exchange

Substrate Removal Mechanism of Trickling Filters

Abstract: A mechanistic model was formulated for substrate removal in a trickling filter with plastic media of the film-flow type by considering the basic physical and biological processes occurring in an elemental volume of slime. It was found that the model developed could be adequately represented by an existing mathematical model. The model was verified in a study using a laboratory-scale filter reproducing the expected hydraulic regime of full-scale units and a waste with glucose as the sole carbon source. It is anticipated that the laboratory and data analysis procedures developed can be used to provide basic design and performance relationships for full scale trickling filters.

The microbial associations developing on experimental trickling filters irrigated with domestic sewage.

Abstract: Summary. The bacterial flora of the film which developed on experimental trickling filters irrigated with domestic sewage was dominated by Acinetobacter and yellow-pigmented Gram negative rod-shaped organisms and it was deduced that purification in certain aerobic waste treatment processes may depend upon an association of these 2 organisms. Further evaluation of the operational procedures likely to have a selective influence on the microbial association which becomes dominant was made in studies using synthetic sewage.