One of the major items in any program of municipal sanitation is the double problem of water supply and waste water disposal. Since streams are the general source of water supply and also the final receptacle for sewage, this dual use of the stream often leads to complications. Sewage and...
The objectives for this study were to determine the causes of
slime formation in activated sludge treatment and to recommend
possible control measures. The primary problem was a seasonal
filamentous bulking which was caused by the mold, Geotrichum
candidum. During the winter, mycelial fibers appeared and formed a
free floating...
A study was conducted to determine the quantity and distribution
of bark debris resulting from log rafting. Three distinct problems were
studied: (I) the quantity of bark dislodged from the logs while being
placed in the rivers and during transport in log rafts; (2) the percentage
of the bark that...
A 9.0 ppb solution of dieldrin in water was passed through a
granular-activated carbon bed at the rate of 4 gpm/sq. ft. The performance
of the carbon was monitored from sampling ports at bed
depths of 2-1/4 and 8-1/4 inches. Isotherm tests were also run with
a 9.0 ppb dieldrin...
A comprehensive study was made on the impact to surface and ground water pollution by a recently populated rural neighborhood located in the foothills of western Oregon. A stream originating in a limited access forest and flowing through a modern zoned housing development was routinely monitored. Sampling was performed during...
A study was conducted to determine the quantity and character
of substances leached from logs floating in water, and the rate of
leaching of these substances. The species of wood studied were Douglas
fir and ponderosa pine. The research was carried out in a controlled
laboratory environment with log sections...