NEW LITERATURE DIGEST Pressure switches. Bulletins ZA300 describes pressure switches which are responsive in the range 18 to 375 p s i . The bulletin includes a glossary of pressure terms and a discussion of some important areas to be considered when selecting a pressure switch. Bristol Co. 90
Flocculator-Clarifier The Nu-Treat flocculator-clarifier is designed for use as a final clarifier in activated sludge applications which require flocculution to enhance the sludge settling. The unit combines the features of random motion flocculation and Tow-Bro sludge removal. Random motion flocculation is achieved through a unique arrangement of the paddles and their relation to the drive shaft. The paddles are connected to the tank wall with Teflon connectors which accommodate the oscillating motion o f the paddles and do not require lubrication or maintenance. The Tow-Bio sludge remover gives complete sludge removal through u gentle suction action rather than the conventional plowing of sludge to sludge hoppers. The suction action reduces agitation of the sludge to a minimum which is particularly important when the sludge is of the light and flocculent type. Rex Chainbelt, Inc. 86
Disposal system. Bulletin 6052 is an 8-page publication that describes a compact, sludge combustion system expressly designed for communities of less than 10,000. The type CR FS disposal system consumes sludge in a cyclonic-flow combustion process, reducing sludge volume by 99%. The self-contained system includes the necessary dewatering, combustion control, and accessory components. It comes pre-wired, prepiped, and can be installed in less than a week. DorrOliver. Inc. 87
956 Environmental Science and Technology
Mechanical aerators. Bulletin B-545 describes Lightnin’ mechanical aerators for the treatment of wastes. Included is an order blank for a slide chart that can be used to make calculations of aeration needs. Mixing Equipment Co., Inc. 88 Catalyst kills odors. A single page reprint describes how a producer of vulcanized vegetable oils for the rubber industry removed mercaptans and other malodors with a catalytic oxidation unit. Oxy-Catalyst, Inc. 89
Desludging information. Technical paper 212 describes how onstream desludging restores heat transfer-for example, as encountered in cooling tower systems. The paper reviews the need for effective materials; discusses antifoulants, chelants, sequestrants, dispersants, coagulants, and mechanical considerations; and cites case histories where selected agents maintained efficient operations. Betz Laboratories, Inc. 91 Oil and waste water treatment. Bulletin C70-65 is a 4-page description of the Gravi-Flote packaged system for treatment of oil waste and other types of industrial waste water. Bulletin C69-65 describes Gravi-Pak, an oil water interceptor-separator, which is useful in automatic waste disposal plants, treating emulsified oils, and removing emulsified oils. Bowser-Briggs. 92 Air pollution control guide. Guide FL67-65 describes chemical methods for reducing pollutants from fuels and coals. The guide primarily discusses stack pollutants such as sulfur oxides. carbon monoxide, hydrocarbons, nitrogen oxides, and particulate matter. Apollo Chemical Corp. 93
SO, recovery process. A 12-page brochure describes the Wellman-Lord process for the recovery of sulfur dioxide from utility and industrial plant stack emissions. The pilot plant was built with the cooperation and assistance of the Tampa Electric Co. at their Gannon Power Station, Tampa, Fla.. where, during the past five
months, tests have been conducted to tiemonstrate the effectiveness of the process. The process involves chemical absorption of the SOz from the flue gas and recovery of the SO2 as a pure anhydrous liquid. Bechtel Corp. 94
Temperature test chambers. Bulletin EP4 describes the company's line of temperature test chambers. The bulletin includes a chart summarizing the features of each chamber such as temperature range, control accuracy, heating and cooling rate, coolant used, and other items. Statham Instruments, Inc. 95 Atomic absorption supplies. Bulletin 82 contains information on supplies for use in atomic absorption spectroscopy. The 8-page bulletin includes information on standard solutions, cathode lamps, lamp holders, a lamp power supply, and the like. Beckman Instruments, Inc. 96
Laboratory instruments. Catalog SI-20 describes dry chemistry analysis units such as p H meters, glass and metallic electrodes, and accessories. Corning Glass Works 97 Biological oxidation media. A 12-page brochure describes Surfpac biological oxidation media for water pollution control. Surfpac media, made of PVC or saran plastic, combines large surface area with high void space and is used as packing for high-rate trickling filters for treating soluble organic waste. The brochure includes a cost comparison of treatment plants using Surfpac media and rock trickling filters, photographs of Surfpac installations, and operating data needed to design full scale Surfpac units. Dow Chemical Co. 98 Organic silicon compounds. Catalog S-3 is a 12-page handbook of more than 200 compounds. It contains a special section on reagents and stan-
dards for trimethylsilylation and packings for gas chromatography of polar compounds. Pierce Chemical Co. 99
Lubricated plug valves. Reference Book 40-1 is a 48-page catalog of the company's line of lubricated plug valves. The valves feature a controlled high pressure lubricant system, a builtin means for moving the plug to prevent sticking, closely mated sealing surfaces, and a triple seal around the stem. Homestead Valve Manufacturing co. 100 Pressure recorders and indicators. Bulletin G-11A describes a series of pressure recorders and indicators for measuring and recording pressures from 0 to 80,000 p.s.i. The 12-page bulletin includes recorders and indicators for outdoor models, panel instruments, portable models, and gas distribution pressure recorders. The catalog contains a chart which shows
IC ROCAPS" (DISPOSABLE MICRO=PIPETTES1
GUARANTEED ACCURACY TO ONE PERCENT AVAILABLE IN 37 STANDARD SIZES FROM ONE HALF TO 100 LAMBDAS SPECIAL SIZES MADE TO YOUR ORDER EASIEST MICRO-PIPETTE TO USE NO NEED TO FILL TO A LINE
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ECONOMICAL ENOUGH TO USE ONCE AND DISCARD
Send f o r f r e e samples and complete descriptive Literature
Volume 1, Number 11, November 1967 957
CHEMISTRY AND THE ENVIRONMENT THE SOLID EARTH THE OCEANS THE ATMOSPHERE
appropriate elements and materials €or different pressure ranges. Foxboro Co. 101
Glassware equipment. LAB-1 is a 336page catalog which gives details on some 3000 laboratory glassware products and equipment. It includes standard Pyrex, Vycor. and Corex brand products, water distillation units, and the like. Corning Glass Works 102
Chemistry and the Environment
7 ’ THE ATMOSPHERE 1 I
-I
[
i
THE SOLID EARTH
;I
Floating oil skimmers. Bulletin 200 describes skimmer models for separating oil from industrial waste waters. Standard models will collect, separate, and pump supernatant oils and oilwater emulsions having viscosities up to 50,000 S.S.U. Surface Separator Systems, Inc. 103
I
Industrial heaters and devices. A 72page catalog, GEC-1005N, describes the company’s line of heaters and heating devices. The catalog includes new products such as quartz tubular heating elements, minicirculation heaters. over-the-side immersion heaters for deep tanks, general purpose air heaters, finned strip heaters, multistage thermostats, and soldering iron holders. In addition the catalog contains information for calculating heating needs. General Electric Co. 104
THE OCEANS /-------\
Special Reports originally published in CHEMICAL & ENGINEERING NEWS A survey of our present knowledge in such areas as gaseous content of sea water the earth’s interior phosphorus cycle in the sea continental d r i f t regions of the atmosphere ocean-floor spreading volcanoes auroras chemical releases in the air Three detailed and absorbing reports written from the special perspective of chemistry’s main contributions t o our understandit consists of, how it was formed, ing of the total earth-what added information from other physical how it is changing-with sciences, as well as the life and earth sciences, t o give a broad, revealing picture.
166 pages with index
cloth bound
(1967)
$5.00
postpaid in U.S.; plus 35 cents, Canada and PUAS; 50 cents other foreign Also available are reproductions, suitable for framing, of the five Dong King.
man water colors which illustrated the article The Solid Earth. Set of Five Order from: Dept.
F
Special Issues Sales American Chemical Society 1155 Sixteenth Street, N.W. Washington, D.C. 20036 958 Environmental Science and Technology
Telemetering systems. Bulletin 36 is a 2-page guideline to assist in the selection of telemetering systems for data collection, transmission, storage, and display. These systems handle variables such as flow rate, gate movement, water level, and water temperature. Leupold & Stevens Instruments, Inc. 105 Automatic deionizer. Bulletin 639 describes four models of automatic deionizers. The deionizers operate at pressures from 40 to 100 p.s.i., in the temperature range 40” to 120” F. The deionizers can be used to deliver demineralized water at moderate flow rates. Elgin Softener, Inc. 106
$2.00 Postpaid
Filtration manual. A 64-page technical specifications manual describes the company’s line of filters, filter holders, air samplers and accessories, and recorders. The manual contains information on typical properties of membranes and filters, chemical compatibil-
ity of filters, methods for calculating flow rates, and instructions for sterilization of holders. Gelman Instrument Co. 107
Glass fiber gates and guides. Catalog W F 67-1 describes glass fiber gates and guides. The 2-page catalog describes gates which have a flexural strength of 40,000 p.s.i. and are one third the weight of steel. The gates and guides are useful for the control of water and waste water and eliminate the need for mechanical operators such as turn wheels. Warminster Fiber108 glass Co. Pressure filters. Bulletin N-400 describes Infilco pressure filters for water filtration in industry, municipalities, and institutions. The 4-page bulletin discusses numerous applications for pressure filters and includes information on backwash procedures. General American Transportation Corp. 109
Low flow indicators. Bulletin DS- 15 10 features flow rate indicators which are designed for applications where accuracy requirements are not stringent. The 4-page bulletin describes models having 65 mm. and 150 mm. scales and are useful for services such as purging. bearing lubrication, seal oil systems and cooling water flow indication. Emerson Electric Co. 110 Nuclear instrumentation supplies. BulLetin 81 includes a complete line of supplies for nuclear instruments. The 16-page bulletin features liquid-scintillation vials, primary and secondary fluors, thixotropic silica, quenched and unquenched standards, standardized solutions, glass fiber filters, and Fluorally mixes. The bulletin also describes accessories such as planchets, syringes, papers, cabinets, and the like. Beckman Instruments, Inc. 111 Pipeline inspection. A 6-page booklet describes the Q-TV system of internal pipeline inspection. The system records the pipe condition as a television camera moves through the pipe and enables the operator to locate any defects. Community Utility Equipment and Supplies, Inc. 112
20 pollutant analyses/minute The Aminco Fluoro-Microphotometer - a filter fluorometer with Multiple Sample Changer accessory, can perform up t o 20 fluorometric or nephelometric analyses per minute, simply and accurately. Used for analysis of: Poly-
7H-benz(de)ant hracen -7 - one, ring.carbonyl compounds and benzo(a)pyrene.
New Moni-Corder is Continuous Pollution Monitoring Station The new Aminco Moni-Corder employs the proven reliability of the Aminco Fluoro-Microphotometer t o provide a continuous pollution monitoring station. Metering pumps sup. ply sample and reagents t o flow-cell of the built-in FluoroMicrophotometer. Strip-chart recorder supplies continuous record of concentration of the monitored contaminant at a preselected absorption of fluorescence wavelength. Alarm sounds, or control mechanism is triggered, when programmed pollution level is exceeded. For full details on the Aminco Fluoro-Microphotometer and Moni-Corder, request Portfolio EST-1 1.
AMERICAN INSTRUMENT CO., INC. 8030 Georgia Avenue, Silver Spring, Maryland 20910 Circle No. 25 on Readers’ Service Card
Volume 1, Number 11, November 1967 959
