Water/Wastewater Aeration Compressors with Excellent Efficiency
With the new AP series, Gardner Denver Thomas (Germany) is once again introducing a series of new linear diaphragm compressors. In contrast to motor drives, linear drives have an armature with a permanent magnet that is moved back and forth between two electromagnets (solenoid) in time with the mains frequency. The armature itself is mounted between the two opposing diaphragms of the pump heads. This technology reduces the wear parts to a minimum which guarantees a very long service life. In practical application, 20,000 operating hours or more are achieved.
The use of Neodym magnetic material made it possible to greatly increase the field strength and thus the efficiency of the linear drive. At the same time, the size was greatly decreased by increasing the power density. The data of the new AP series AP-40, AP-60, and AP-80 speaks for itself. For example, the power consumption is only between 0.63 and 0.53 Watts per l/min with a counter-pressure of 150 mbar. The volume flows here are between 46 and 86 l/min. The maximum pressure is now 300 mbar.
All screws for opening the compressor are now accessible from the top and greatly simplify the replacement of the pump block after approx. 20,000 operating hours. A diaphragm safety switch, which is triggered when the deflection of the armature is too great (caused by transport or in case of a tear in the diaphragm), is also accessible from the top by means of the cover of the filter and thus be reset.
Due to the smaller dimensions and the low weight of only 4.7 kg, installation in switchboxes, for example, is simplified.
Linear compressors by Thomas are used in various applications. Manufacturers of small wastewater treatment systems primarily use the technology for the aeration of wastewater and sludge. Due to their excellent efficiency, the compressors are also used for primary air supply in fuel cells.
Reader Reply Card No. 129
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High Precision Analysis of Organic Compounds in Water Samples
Shimadzu (Germany) introduces the TOC-L Series of analysers for total organic carbon testing in aqueous samples. With a wide sample range from 4 µg/L to 30,000 mg/L, the TOC-L is suitable for analysing ultra-pure to highly contaminated samples of wastewater, brine water, seawater, drinking water and pharmaceutical water.
Consisting of four models, including PC-controlled and standalone versions, the TOC-L uses Shimadzu’s 680°C combustion catalytic oxidation method to efficiently analyse all organic compounds. It features automatic sample acidification and sparging, as well as an automatic dilution function that reduces sample salinity, acidity and alkalinity. This significantly extends the use of catalysts and combustion tubes.
The TOC-L Series features variable syringe sizes when the sample volume is limited. High-precision mass flow controllers ensure uninterrupted carrier gas for accurate analysis. A zero-maintenance Peltier cooler used for maximum water vapor removal ensures accurate analysis. In addition, an on-board air purifier may eliminate the need for high-purity air during testing.
The optional salt kits permit 12 times more salt to be analysed before maintenance is required. The ASI-L autosampler can use three different vial sizes for various applications, while the smaller OCT-L autosampler can use any vial size for up to 8 or 16 samples.
TOC-L models can accept particulates up to 500 microns or 800 microns with the optional particulate kit. For larger particles, solids, soils and sludge, the SSM-5000 is the ideal solution. The TNM-L can be added for simultaneous TOC and Total Nitrogen analyses without increasing the size of the footprint.
Additional hardware features include a new color LCD monitor and USB communications for computer, printer and data storage. These eco-friendly systems use 36-percent less energy than previous models, and the TOC- L’s footprint has been reduced by 20 percent to save valuable lab space.
Reader Reply Card No. 130
Measure Fat, Oil and Grease
Levels in Wastewater... on-site results in 10-15 minutes!
Spectrophotometers Benefit From New Features in the Latest Software Version
Merck’s (Germany) Spectroquant® Pharo 100 and 300
spectrophotometers combine the benefits of system photometers with the versatility of spectrophotometers and open up the possibilities for water and food analysis. The latest software version v 2.03 provides new methods for the Pharo instruments.
The Pharo instruments in the APHA 2120F method record every 10 nm, a single value in the range of 400 to 700 nm. These 30 values are combined and expressed as a single result.
Additionally, the software provides 3 different methods for chlorophyll measurement and an option to analyse nitrate in the Pharo 300. Reader Reply Card No. 131
InfraCal TOG/TPH Analyzers let you quickly and easily:
• analyze produced water on offshore oil platforms
• monitor refinery or industrial plant wastewater effluents
• measure FOG discharge levels into treatment centers Part-Per-Trillion VOC Analyser Announced
Anatune (UK) has announced a part-per-trillion upgrade to their successful VOC Analyser. This instrument uses static headspace extraction with gas chromatography-mass spectrometry (HS-GC/MS) for the determination of volatile organic compounds (VOCs) in drinking water and waste water.
Until now, analysis in the concentration range 1 to 100 µg/L was the norm but Anatune’s upgraded VOC Analyser makes it possible to carry out measurements at sub
µg/L levels (i.e. parts per trillion). The system performs well for gases such as dichlorofluoromethane and vinyl chloride, through efficiently trapping these compounds
at the head of the column by cryo-focusing.
The upgrade uses a GERSTEL CryoTrapSystem (CTS 2) to improve headspace method sensitivity by refocusing the headspace extract. By so doing, it is possible to improve
sensitivity without loss of peak shape.
Limits of detection are in the order of 0.01 µg/L (10 parts per trillion) for most compounds, including some "problem" compounds such as oxygenates. This capability can be delivered as part of a complete Rapid Results Solution, or can be bought as an upgrade to an existing Anatune VOC Analyser.
Reader Reply Card No. 132
With over 2,500 in operation, InfraCal Analyzers are the worldwide industry standard for on-site measurement of total oil and grease (TOG), total petroleum hydrocarbons (TPH) or Fats, Oils and Grease (FOG) in water.
Don’t wait for off-site lab tests to ensure compliance as fines for discharges above permit requirements can be costly – often more than the price of an InfraCal TOG/TPH Analyzer!
To learn more, visit our web site
www.wilksir.com or call: 203-855-9136 or email:
info@wilksir.com
Reader Reply Card No. 133
IET May / June 2011
www.envirotech-online.com
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