Technology news 13

Filtration+Separation September/October 2012

New adapters for SFE filters

Small Flow Element (SFE) filters from Meissner can now be specified with a variety of adapters for installation into new housings or retrofit applications.

Adapter selection includes an industry standard 116 O-ring, 222 O-rings and 226 O-rings. A specialised SK adapter version is also available for Meissner SKR filter housings, or retrofit of competitive housings that require a skirt-flange sealing mechanism.

The new filters are available in lengths of 2.5 in. (6.4 cm) or 5 in. (12.7 cm). Media options

available for specification include PVDF, PES, PP, PTFE, borosilicate glass microfibre, PP microfibre, and PP depth. Filtration ratings can be specified from 0.04 to 99 μm. SFE filters are specifically designed for point-of-use filtration and small batch processing of liquids and gases, where flow requirements are less than 3 gpm (11 L min-1) or 60 scfm (102 Nm3hr-1).

Meissner adds that the pleated small-area filters provide good chemical compatibility and extremely low extractables.www.meissner.com

Small flow element filters from Meissner.

Severn Trent secures Chinese deal

Severn Trent Services has signed a contract with the Yangtaizi Wastewater Treatment Plant in the city of Bengbu in China’s Anhui Province, to provide a TETRA® Denite® denitrification system for its Phase II project - a water pollution control development with a 260 million yuan ($41 million USD) investment. The system is capable of simultaneously removing total phosphorus (TP), nitrate-nitrogen (NO3-N) and total suspended solids (TSS) to meet the stringent Level 1A standard for effluent discharge.

The TETRA Denite denitrification filter technology has more than 30 years of experience in secondary, tertiary and advanced wastewater treatment applications throughout the world. TETRA Denite acts as a bioreactor to achieve denitrification; the technology allows the growth of microorganisms on the gravel surface and filter layer. Such biological treatment processes can also achieve Level 1A standard quality of effluent discharge through secondary wastewater treatment.

Severn Trent Services adds that the TETRA Denite system is both a fixed-biofilm bioreactor and a deep bed filter, whose main function is to remove NO3-N and TSS. TP is reduced by adding flocculant to meet a high standard of effluent discharge. The Denite denitrification filter is capable of simultaneously removing NO3-N, TP and SS to meet the extremely stringent discharge requirements in a single step, which greatly reduces the floor space, capital investment costs and operating costs while ensuring space for future upgrade and transformation.

The Yangtaizi Wastewater Treatment Plant is one of the first wastewater treatment plants to meet the Level 1A standard of effluent discharge in China. The plant’s construction was undertaken as part of the State’s ‘three rivers and three lakes’ water pollution control project. The plant will account for nearly one-third of the total wastewater treatment in the surrounding urban areas. Phase II of the project is expected to reach a scale capable of treating 100,000 tons (24 million gallons) of wastewater per day. www.severntrentservices.com

GKD expands in Latin America

German company Gebr. Kufferath AG (GKD) has formed a subsidiary in Chile. GKD LatAm S.A. is a joint venture with the Chilean corporate group Eco Inversiones Limitada. The new production site, based in Santiago de Chile, will handle filter media,

process belts, architectural and design mesh, as well as systems technology for defined solid-liquid filtration markets. The new company is 70% owned by GKD and commenced operations on 1 September 2012.www.gkd.de

FISE0512_news_technology 13 19-09-12 17:34:20