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Clean up stack gases I
Oxy-Catalyst Pre-Engineered Oxidation Units are, quite frankly, a good buy. Here, at last, is a series of 10 basic models
that effectively remove noxious gases and o d o r s . . .that require minimum servicing and maintenance.. . that can be designed into a complete air pollution control system . . . and all parts of the units are guaranteed.
More value per dollar? Yes! You get lower initial cost, faster delivery, and longer life because the construction quality is unsurpassed in the industry for standardized units. What's more, you get an array of options to meet virtually every system requirement. And here are your basic choices: Catalytic Oxidation Units in five basic models with capacities from 1,000 to 12,000 SCFM. Thermal Oxidation Units in five basic models with capacities from 500 to 6,000 SCFM.
Catalytic units are smaller than thermal units and operate at as much as 40% lower temperature. As a result they need less fuel. Either type of oxidation unit can be installed horizontally or vertically. For more information on our pre-engineered units, plus other products and services, write for free literature.
Pollution never had it so bad
OXY-CATALYST, INC. Research-Cottrell, Inc. East Biddle Street, West Chester, Pa. 19380
SUBSIDIARY OF
to the average homeowner is expected to rival the price of his house! The primary justification for sewers lies in preventing the contamination of groundwater supplies by nitrates from human toilet wastes. (Incidentally, sewers do nothing to curtail nitrate contamination by fertilizers, which are estimated to contribute about half of the loading in Suffolk County.) Other water-borne wastes are either degraded or filtered out in the soil (e.g., organic matter, phosphates), or banned (e.g., surfactants). Thus, if separate disposition could be provided for toilet wastes, which constitute less than 1 % of an average household's waste load, the remaining waste water could be recycled through the purifying mechanisms of the soil to replenish groundwater supplies. Fortunately, modern technology is able to provide for such separate disposal by thermal, chemical, or biological treatment. Several manufacturers are offering such systems at a small fraction of the cost of sewers and none of their adverse environmental effects. Why then have these innovations not been adopted in Nassau and Suffolk Counties? The rhetoric is long and tortuous, but it all boils down to the fact that most sanitation officials abhor innovative approaches, in spite of the immense economic and environmental benefits that would accrue. Alex Hershaft Environmental Technology Seminar Bethpage, N Y 11714
Missouri controls strippers
DEAR SIR: In your January 1972 article on surface mine legislation (p 27), you state that Missouri does not have legislation controlling the surface mining of coal. This is not correct. The 1971 Missouri General Assembly passed bills regulating the surface mining of coal and other minerals. These bills impose a bonding requirement on surface miners that is designed to ensure that the affected land is reclaimed. This legislation can be found in Chapter 444 of the Revised Statutes of Missouri, 1971 Supplement.
Peter H. Ruger Assistant Attorney General State of Missouri Jefferson City, M O 65101 0
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194 Environmental Science & Technology
We regret the error--Ed.
