ATLAS GAS ANALYZERS
of the large unit. Your report was based on a press release describing completion of the first of the six field demonstrations. Averill J. Wiley Technical Director Pulp Manufacturing Research League, Inc. Appleton, Wis. 5491 1
THE N E W INDUSTRY STANDARD FOR AIR POLLUTION M O N I T O R I N G
so2
so2
Specific Colorimetric
a n d Reducing Agents lodometric
Specific Colorimetric
a n d Total Oxidants lodometric
NO Specific Colorimetric
Aldehydes Specific Colorimetric
Specific Colorimetric
DEARSIR: In your March 1969 Current, “Paper makers evaluate portable reverse osmosis unit,” the copy implies that the Pulp Manufacturers Research League, Inc., alone developed the reverse osmosis or industrial kidney process. This implication is not entirely correct. The system, in its entirety, was manufactured and assembled by Havens International in San Diego, Calif. The reverse osmosis modules used are a proprietary product of Havens, and our firm hzs spent more than $4 million and seven years in their development. The people at Pulp Manufacturers Research League have conducted several years of laboratory and pilot-scale work with the modules and furnished the technical and operating data necessary to permit the design and construction of the larger mobile system. Fred B. Leonard Vice President, Marketing Havens International Sari Diego, Calif. 92123 Educators’ vital role
Now approved and recommended by many governmental agencies and private industry, Atlas analyzers are available for use with fixed, mobile and stack installations. Schulze patented chemical methods of analysis. Extremely accurate, best available sensitivity and response speeds. Continuous recording ( o r input to any recorder or telemetry system) Automatic re-calibration and standardization. Automatic water-make-up and reagent handling. Unique in design and easy to operate. Low installed cost. Highly reliable-unattended operation Dual channel models available.
ATLAS ELECTRIC DEUXCES COMPANY 4114 N. RAVENSWOOD AVE., CHICAGO, ILL.. U . S . A . 60613 P H O N E 312-327.4520 C A B L E , ATELDECO C i r c l e No. 11 on Readers’ Service Card
508
Environmental Science & Technology
DEARSIR: Time has finally caught up with us and our technological tampering with the environment no longer can be lightly brushed aside. The problems and challenges must be met by those with enough background to enable them to efficiently and broad-mindedly set to work, and this calls for education. I think we would all agree with H. E. Hoelscher, W. R. Turkes, and J. I. Abrams, that “Educators have a vital role in environmental engineering” (ES&T, March, 1969, pages 23540). The need for appropriate training in engineering graduate work has been demonstrated and solutions outlined. I wonder, however, if such educational programs should not also be included in physics and chemistry courses not necessarily leading to an engineering degree, at the undergraduate level. (Continued on page 5 1 0 )
Does your plant have bad breath? SO, -sulphur dioxide - i s the major cause of air pollution by industry and the chief target of government complaint. Leeds & Northrup, long active in environmental measurement and control, has attacked the problem and devised equipment to detect SO, and provide the records you need to prove your stack exhaust is within established standards. These include: The L&N Infrared Gas Analyzer, to measure SOn concentration i n the stack. L&N Low-Range Force-Balance Transmitters, to measure pressure, differential pressure and flow of gases in combustible-fuel processes.
L&N Thermocouple Assemblies, to detect gas temperature in the stack. Speedomax' recorders, used with such detectors, provide permanent, day-to-day records of the factors of the mass-flow equation. A simple analog computer can provide a direct, on-the-spot analysis of your plant's SO, characteristics, in terms of pounds of sulphur per hour, for example. Equipment is also available for the measurement of other gases significant to air pollution, and of other factors related t o the problem; for example, the L&N Smoke Density Recorder and its associated Smake Sampler can give you a continuous
record of smoke density in the stack -and a prompt warning if a pre-set limit i s accidentally exceeded. For more information on any of these instruments, or the solution to any environmental problems, contact your local L&N field office-or write Leeds & Northrup, North Wales, Pa. 19454.
LEEDS Phrladelphia
N~ORTHRUP Pioneers in Precision
C i r c l e No. 58 on Readers' Service Card
Volume 3, Number 6, June 1969 509
membrane
filter
technique
for water and waste-water analysis
S&S B9 Membrane filters are used to trap water sample bacteria to get coliform colony counts. B9’s are white with black grid marks, and have a porosity of 0.45 micron. Diameter size, 47 mm. After 20 hours of incubationat 35’C *2”, a count of coliform colonies can be made to determine if the water is suitable for drinking or swimming. Membrane Filter Techniques, in the analysis of water and waste-water,are detailed in STANDARD METHODS. These BAC-T-FLEXrM filters are packaged 100 to a box. Also available in special autoclaved packed units. B9’s are listed and approved in U.S. Oept. of the Interior Training Manuals. the first name in filtration.. .
SCHLEICHER & SCHUELL (603)352-3810
I
Schleicher & Schuell, Inc. Keene, New Hampshire 03431 Please send Bulletin 90 for information on Membrane Filters and Apparatus.
1
City
State
Zip-
ES 669
Circle No. 51 on Readers’ Service Card 510 Environmental Science & Technology
Granted, “pure” sciences d o not present the immediate appeal for problem solving and applied on-the-job manipulation of environmental circumstances. But, since engineering is at least partially based on research efforts and theory of the “pure” sciences, and because basic research may well be a key to new methods and information which may readily be applied to problem areas, students of physics and chemistry also should be introduced to the environmental outlook. Seen as a larger framework in which physics and chemistry can operate fruitfully, the environmental approach can be a valuable addition to their study and research. I d o not propose any specific programs here, but from my own experience, a liberal arts college seems to be an ideal place to take ad4antage of a wide variety of established frameworks through interdepartmental studies. The whole spectrum of academic areas being available, the student can learn from many different approaches how science and technology fit into the world’s biological, geographical, and social systems. F o r example, such seemingly unrelated fields as history and philosophy are useful in placing man’s technological framework in a continuum of advancement and change of ideas concerning his surrounding world. Biology is important for the knowledge of life processes obviously necessary in dealing with biotic communities in the environment. Even sociology, for instance. can show how technology changes our ways of life and offers an ecological model for change. In fact, the more one looks. the harder it becomes to find areas which are not applicable to studies of environment and technology. Within the physics and chemistry departments themselves, more can be done to show the student how his knowledge and the tools of his field are relevant to current work in environmental control and the world around him. Professors are well aware-and students wholeheartedly agree-that course materials are tightly packed into the year’s work. There should, however. be time for a few comments on relevant applications along with the all too often sterile course topics. Programs can be worked out-must be worked out-to fit each school’s situation and the environment’s needs. Roger L. Franz Grinnell College Grinnrll, Iowci 501 12
*TVA uses it. FWPCA uses it. Ontario Water Resources Commission uses it. Gulf Research uses it, .Humble Oil uses it. Shell Oil uses it. Nalco Chemical uses it. Ohio Dept. of Health uses it. City of Dallas uses it. *Texas A & M uses it. Purdue University uses it. I
.
And so do scores of others to fight Organic Water Pollution.
This Beckman Model 915 Total Organic Carbon Analyzer gives a complete determination of total organic carbon in less than 5 minutes. It lets you monitor effluents and receiving waters for fast control of industrial and sanitary wastetreatment plant operation and detects product loss. To see what it will giveyou, contact your Beckman Field Sales Representative.. . o r write for Data File PTOC-12-169.
INSTRUMENTS, INC. PROCESS INSTRUMENTS DIVISION FULLERTON, CALIFORNIA
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