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The river basin model: municipal services department
1971
Heat shrinkable tubing as sewer pipe joints
1971
The effects of agricultural waste water treatment on algal bioassay response | Bio-engineering aspects of agricultural drainage, San Joaquin Valley, California
1971
A predictive model for thermal stratification and water quality in reservoirs
1971
Markofsky, Mark | Harleman, Donald R. F.
Closed system waste management for livestock
1971
Ngoddy, Patrick O.
Purification of mine water by freezing
1971
Potential environmental modifications produced by large evaporative cooling towers
1971
Complete mix activated sludge treatment of citrus process wastes
1971
Control of pollution from outboard engine exhaust
1971
A reconnaissance study has been made to determine the extent of pollution which results from the operation of a two-cycle outboard engine. Comparisons have been made of engine operation with and without a pollution control device attached. Studies have also been made of the biodegradability of the fuel and exhaust products. Tests made in a swimming tank with an untuned engine have shown that the quantity of fuel wasted as exhaust varied from about 7 percent of the volume of fuel used at high speeds, to over 30 percent at low speeds. For a recently tuned engine, the quantity of fuel discharged ranged from about 3 percent at high speeds to about 26 percent at low speeds. When the Goggi pollution control device was installed, these quantities were intercepted and collected rather than discharged with the exhaust. Analyses at various depths indicated that nearly all products separated from the water in a short time and collected on the surface. Very little dissolved or emulsified oil was noted. Various analytical techniques were studied. Both fuel and exhaust products are capable of supporting microbial growth. Growth rates, however, appear to be limited by available oxygen.
Mostrar más [+] Menos [-]Research on the physical aspects of thermal pollution
1971
Sundaram, Thirukurungudi Rangasamy
