Water / Wastewater Treatment


Improving Hydraulic Performance of Power Station Flume


Chemical Pumps Worth €1.7 Million Delivered to Chinese Customer


Allweiler (Germany) fulfilled a large order for centrifugal pumps in China. The PET, glycol, and thermal oil pumps are part of expanded polyester production in Wujiang.


The order was for eight pumps for PET production, 140 glycol pumps, and 20 thermal oil pumps for the plant’s primary and secondary loops. The pumps delivered to Wujiang will be used to expand a polyester production plant. According to Stefan Kleinmann, Vice-President of the Industry business segment and member of the Allweiler AG executive board: "Allweiler AG won this contract because the operator of the plant has been using our pumps with great success since 2003. The long-term and very effective support provided by our subsidiary in Shanghai was another reason."


The pumped liquid can reach temperatures as high as 280°C during production of synthetic yarns. For this reason, the pumps are manufactured from 1.4581-grade stainless steel, a highly heat-resistant material. The special metal bellows-type seals are also designed to handle these high temperatures. The CNH-B series pumps are equipped with supplemental heating because liquid polyester begins to solidify below


Fernco Environmental (UK) has successfully completed the first phase of a renovation project at the Liawenee Flume in Tasmania using the company’s epoxy coating system Ultracoat.


The main objectives of the project were to improve the hydraulic performance of the flume and to protect the surface from further erosion. By doing so, the water flow rate to the power station would improve, increasing the efficiency of power generation.


The Liawenee Flume, constructed in 1921 in the central highlands of Tasmania, forms a crucial part of the power generation infrastructure on the island, as a 100% of the island’s electricity supply is generated by a 30MW hydroelectric power station.


The flume is also in a ‘World Heritage’ site and home to several endangered species: the Spotted Tailed Quail, the Brown Poa Butterfly and the Tasmanian Devil, therefore any disturbance to the environment had to be kept to an absolute minimum.


Ultracoat is largely used to rehabilitate drainage infrastructure, and it was Ultracoat’s extremely smooth surface, providing virtually no resistance against the flow of water, that proved to be an ideal solution in Tasmania. Over 400 sq. m. of surface was rehabilitated using the product.


28m3


Since the upgrade, the flume is now capable of passing /s of water through the same cross section, an increase of


around 55%,


Jon Crean, managing director at Fernco Environmental, commented, “The project at the Liawenee Flume was extremely successful and shows the advantages and flexibility of the Ultracoat solution. We are looking forward to completing more projects like this in the future.”


Reader Reply Card No 28 250°C. Capacity is 400 m³ per hour at a pressure of approximately 14 bar; drive power is 180 kW.


Allweiler’s largest chemical-standard pumps from the CNH-B series in size 200-500 are used to move thermal oil in the primary loop. This series reaches a capacity of 1200 m³ per hour at a maximum pressure of 25 bar and a maximum delivery head of 147 m. Liquid temperature can be as high as 350°C. Pumps of types NTT and NTWH are used in the secondary loop, depending on the liquid properties. In this application, the "Therminol" heat transfer oil reaches temperatures of 330°C and higher.


Reader Reply Card No 26


Tsurumi Aerators Deliver Wastewater Treatment to Remote Areas


Tsurumi (Germany) aerators allow businesses to create their own cost-effective and self-contained solution for wastewater treatment – particularly useful in remote areas not covered by municipal wastewater treatment plants.


The global pump manufacturer’s TRN aerators have been used for this purpose at a remote holiday park on the island of Krk in Croatia. The island does not have a municipal wastewater treatment plant so businesses must create their own solution, which is why the campsite is now home to two TRN aerators from Tsurumi.


The aerators are situated in a small activated sludge tank where all of the


camp’s wastewater is delivered. The aerators distribute a strong flow of water and air throughout the tank to prevent sediment forming and to ensure the water is uniformly oxygenated.


Eko-Voda., a Croatian company that specialises in wastewater treatment, installed the aerators. The company enjoyed such success on this project that the company has decided to only use Tsurumi aerators in future.


“Tsurumi’s aerators are built to the highest level of quality, require a simple installation procedure and are easy and cost-effective to maintain,” explains Zoran Pribanić, director at EKO-VODA d.o.o. “Since using their aerators, we have removed all other manufacturer models from our range.”


Reader Reply Card No 27


Black & Veatch to improve coastal and inland water quality on behalf of Scottish Water


Scottish Water has selected Black & Veatch (UK), in joint venture with Morrison Construction, to design and implement a £31 million initial phase of a storm water management project that will improve surface water quality for more than 80,000 people in north and east Ayrshire.


“Black & Veatch is a leader in developing sustainable solutions for storm water management challenges in communities worldwide, improving the quality of local water ways and the surrounding environment,” said Dan McCarthy, President and CEO of Black & Veatch’s global water business. “Our integrated global workforce enables us to apply best practices, advanced technologies and processes to these complex programs, regardless of location.”


The initial element of the project is scheduled for completion in January 2013. Project execution in the Kilmarnock area will be phased in order to ensure delivery of the most robust and cost effective design. The first phase of this work will take place between Gatehead and Irvine.


Reader Reply Card No 29 Reader Reply Card No 30 www.pollutionsolutions-online.com • February / March 2011


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