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...
A study of the effect of elevated pressure on the activated
sludge waste treatment process is presented. The method of study
involved a comparison of two laboratory, batch type, activated sludge
units. One unit was operated at atmospheric pressure as a base control
and the other operated at elevated pressures...
The purification capacity of an activated sludge process is highly
dependent of the rate of oxygen transfer from the air to the microorganisms.
This rate can be increased in an air diffusion system by
subjecting the culture to high shear and high pressure.
A study of the effects of high...
Dissociation between catabolism and anabolism, generically termed
“metabolic uncoupling”, has been studied for aerobic cultures of Shewanella
oneidensis MR-1. Under conditions promoting metabolic uncoupling, the cell yield
diminishes while the substrate utilization rate remains largely unchanged. The
effects of excess substrate conditions and TCS addition on the metabolism of
Treatment efficiency in a constructed wetland is related in part to the amount of
time that a wastewater remains in the system. Current design methods idealize the system
as a plug flow reactor and use a "residence time" based solely on the volume of the cell
and the flow rate....
The purpose of this research is to hydraulically characterize an engineered wetland in Albany, Oregon. The wetland receives treated wastewater from both Albany Millersburg Water Reclamation Facility (AMWRF) and ATI Wah Chang. AMWRF's water is municipal waste water. ATI Wah Chang's water comes from its nearby metal processing plant. The...
Due to the effective antimicrobial properties of silver nanoparticles they represent a significant proportion of all consumer-‐related nanomaterials. The introduction of silver nanoparticles from these products into domestic and industrial wastewater streams poses potential complications for biological treatment systems. A critical component of biological treatment that is extremely sensitive to...