Water / Wastewater Treatment


Realising Energy Savings There are several factors that contribute to the cost of compressed air. These include the plant’s physical


climate, the layout, the amount of waste, the equipment in use (including the diffuser, compressor and control system), the piping configuration, the flow instrumentation and the energy supplier. If you could design the perfect system, all of these factors would work together to promote the


optimum microorganism growth rate needed to treat thewater in the shortest amount of time by using the least amount of compressed air. While perfection is beyond most of us, improvement is possible and valuable. If your energy costs seem high, be sure to consider all the variables, including the type of the flow meters, where they are placed in the pipeline and their calibration for your application. You can optimise compressor efficiency and minimise energy costs by selecting the best flow


meter technology for your application. To determine the potential savings, consider the amount of compressed air consumed daily and then look atwhat a small percentage improvement in compressor efficiency is worth. Then ask your flow meter supplier to help you review the performance of the instrument in the actual application.


Conclusions Improved process effectiveness and reduced energy consumption are two of the main benefits of


choosing the best flow meter for your wastewater treatment aeration system. Looking carefully at measuring accuracy and range needs, installation conditions and complexity, and maintenance requirements will result in selecting the most cost effective flow metering solution. In recent years, manufacturers have developed flow meter technologies that do a better job of


meeting the measurement needs of air flow, digester gases and other gases. Wastewater treatment facility operators now have more options to improve their processes and manage costs. At Fluid Components International, for example, we have designed a broad range of new and enhanced flow meters for aeration flow measurement and other wastewater treatment applications. We designed the ST50 model Flow Meter (Fig 3) specifically for optimising the aeration and


compressed air applications used inwastewater treatment facilities like yours. The ST50 incorporates thermal mass flow sensor technology for a no-moving parts insertion style element with optional wireless IR communication, which is easy to install and requires virtually no maintenance. Its


transmitter electronics include dual analog outputs and optional digital readout all housed in a small, rugged, metal enclosure for long service life regardless of installation of environment.


Accuracy is an important factorwhen you are evaluating flowmeters for an application. However,


focusing on accuracy alone can be misleading since it’s the flow meter repeatability that ultimately optimises the aeration system. Add overall performance, reliability, installation requirements and lifecycle costs to your flow meter checklist. You can also avoid headaches if you ask about how well the flow meter will operate within your specific environment. Don’t forget to consider the ease of installation and think ahead about maintenance. To evaluate your true total investment cost, compare the initial cash outlay to the total cost of operating your next flow meter over its lifecycle.


Roche Uses Energy from Wastewater


The pharmaceuticals company Roche Diagnostics has decided to build at its Penzberg site in Upper Bavaria, Germany a new anaerobic plant for the biological pre-processing of a partial wastewater flow. The plant, which produces energy-rich biogas, will supplement an existing membrane system. The anaerobic plant will be built by Aquantis, a subsidiary of VeoliaWater Solutions & Technologies.


The new system is to pre-treat partial wastewater flows which are especially rich in carbon and biologically degradable liquid waste from the bio-technological production. Employed will be a 480 m3


Biobed® EGSB reactor (Expanded Granular Sludge Bed) for the biological treatment. In the course


of this process energy-rich biogas is produced, collected and processed. The gas will be used in a combined heat and power plant in the Penzberg site’s boiler house to generate both forms of energy. The amount of electricity thus gained will cover more than 90 per cent of the energy needs of the wastewater treatment plant, and the heat energy will be used to pre-heat the boiler feedwater in the Energy Centre. Further savings will be achieved by the elimination of the previous upstream aerobic high-load stage. The carbon dioxide emission will be reduced by about 950 metric tons a year, by which Roche in Penzberg will achieve a sustainable reduction of its carbon footprint. Assembly of the anaerobic plant is planned for end-March 2011, and start-up for November 2011. The project was planned by the consulting engineering office of Dr Resch in Weissenburg.


The Biobed® system has so far successfully proved itself in more than 500 reference plants


around the world, of which the Aquantis experts alone have built 60 large-scale plants. The determining factor for the Roche company’s decision in favour of a Biobed®


system was the


mature process technology that has been proven many times in practice. The company convinced itself in advance of its decision by comparing the operating experience of the reference plants of various competitors. This evaluation was finally so convincing that Roche decided to award the contract to Aquantis.


Reader Reply Card No 85


Koch Membrane Systems (USA) has been selected to provide PURON™ membrane bioreactor modules for the wastewater treatment plant at United Auburn Indian Community’s Thunder Valley Casino in Lincoln, Calif. The project will upgrade and expand capacity at Thunder Valley Casino’s existing wastewater treatment plant.


Kruger Wins IFAS Contract in New Hampshire


Kruger (USA), a Veolia Water Solutions & Technologies company, received the Purchase Order from Penta Corporation to furnish the AnoxKaldnes IFAS process for the expansion and upgrade of the Hooksett, New Hampshire Wastewater Treatment Plant. Hooksett’s facility will be one of the first wastewater treatment plants in New Hampshire with biological nitrogen removal and it will also be the first plant in the United States to use the high surface area Biofilm Chip™ M IFAS media with 1,200 m2


/m3 of specific surface area. By using the Biofilm Chip™ M media, Graves Engineering of Worcester, Massachusetts was able to design the upgrade of the


wastewater treatment plant without the construction of additional aeration tanks on the highly constrained site, which saved Hooksett Sewer Commission over $1.0 million. When the plant goes on line in the spring of 2011, the treatment capacity will be increased from 1.1 MGD to 2.2 MGD. Target effluent concentrations are 15 mg/l BOD, 15 mg/l TSS and 1.0 mg/l of ammonia. Nitrogen will be removed in anoxic zones upstream of the IFAS aeration tanks by returning nitrified mixed liquor to the anoxic zones, and anaerobic zones are being constructed for biological phosphorus removal.


The plant expansion is being funded in part by the American Recovery and Reinvestment Act. While most of the media is produced in the United States, this specific type is not. Therefore, to comply with the “Buy American Requirements,” Graves Engineering, in conjunction with Kruger Inc., obtained a waiver for the foreign made Biofilm Chip™ media. This was the only media that could meet the design objective of expanding the plant without the need to construct additional aeration tanks.


In addition to the Biofilm Chip™ M media, Kruger is also supplying the medium bubble aeration grids for the IFAS zones, and media retention sieves. Reader Reply Card No 86


KMS provided 12 PURON PSH 500 modules, ancillary equipment, controls, engineering and technical services for installation in two new process trains and as replacements to an existing competitive double header module. The system is designed for a daily flow of 1.2 million gallons.


“Retrofitting existing systems with PURON modules is


relatively easy and KMS has seen an increase in our MBR retrofit business,” said Imran Jaferey, vice president of water and wastewater at KMS. “The design of the PURON modules improves air efficiency and energy costs. The wastewater produced for Thunder Valley meets the stringent requirements for use of recycled water for on-site irrigation, required under California Code of Regulations Title 22.”


According to Bill Slenter, principal, HydroScience Engineers,


Inc., which designed and managed the project’s construction, “We evaluated multiple membrane technologies and selected KMS based on our determination that it was a robust, quality membrane system with innovative features that would work well in the intended application. In addition, it was offered at a very competitive price.”


Reader Reply Card No 87


Casino Expands Wastewater Treatment Plant


24


www.pollutionsolutions-online.com • Annual Buyers’ Guide 2011


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52