Water Journal : Water Journal May 2015
MAY 2015 water 89 water Business WATER BUSINESS HOW TO REMOVE STRUVITE AND PRODUCE FERTILISER New to the Australian market is a technology capable of creating a by-product phosphate fertiliser for sale, simply by removing struvite and reducing phosphate in sewage treatment plants. The technology, called AirPrex®, is an advanced struvite removal and biosolids enhancement process by German cleanteq group CNP. It is now available in Australia and New Zealand via water and wastewater treatment expert Hydroflux. AirPrex® can remove struvite for fertiliser, but also reduce phosphorus load returned to the plant by 90 per cent. This improves sludge dewatering performance, reduces polymer consumption, creates higher cake solids and reduces a plant’s overall operational expenditure. “This technology is ideal for municipal sewage treatment plants as it can reduce operational expenditure by removing struvite, which can block pipes and cause expensive mechanical issues. All without increasing chemical use,” said John Koumoukelis, Director of Hydroflux. “The by-product fertiliser can be sold or offered to industry or community for use, creating another opportunity for councils to support their local area.” CNP G.m .b.H of Germany have several AirPrex® installations throughout Europe. The technology is most applicable for sewage treatment plants with equivalent population loadings from 50,000 through to 1.5 million. For more information please go to www.hydrofluxhuber.com.au. EDUR DAF PUMP SAVES CAPITAL COST, ENERGY AND MAINTENANCE COSTS A single DAF Pump is said to be able to replace the entire air bubble system on DAF (Dissolved Air Floatation) plants, according to pump supplier, Hydro Innovations. Their Edur® “Multiphase” pumps draw in air through a “snorkel” in the suction line, sheer the air, then feed it into the DAF plant, producing a discharge stream into the tank that is saturated with 30 to 50 micron air bubbles. Conventional DAF systems normally consist of a wastewater tank, compressor, air saturation vessel and effluent pump. The effluent pump draws effluent from the tank and pumps it into the air separation vessel. A compressor pumps air into this same vessel. The air/water mixture is “saturated” under pressure, then released back into the wastewater tank at atmospheric pressure where tiny bubbles form and adhere to the suspended matter (fats, oils and other small wastewater particles). The bubbles, with their attached suspended matter, float to the surface of the tank, where floatables can be skimmed off the surface. By using Edur® Multiphase pumps, which can produce their own micro- bubbles, asset owners can do away with the compressor, the air saturation vessel and any control and/or ancillary components for these items. The reduction of these system components, and the simplification of the system design, results in lower investment costs and higher operational reliability. The Edur® Multiphase (DAF) pump is also an efficient alternative. Now, one pump can replace the conventional pump, air saturation tank, and the compressor. Energy costs (as well as maintenance costs) of running the compressor are eliminated. Edur® multiphase pumps can deliver flows from 1 l/s for smaller DAF plants to 15 l/s for larger DAF plants, and produce pressures to 12 Bar. A variety of materials and seal arrangements enable Edur pumps to operate in a wide range of applications. Available materials include ductile iron, “gunmetal” bronze, stainless steel and super duplex. Mechanical seals are available as balanced, double and tandem. For more information please email email@example.com or phone 02 9898 1800. MCBERNS STRENGTHENS PRESENCE IN NSW Due to changes in its distribution arrangements, McBerns will now have a stronger presence in New South Wales. The company has been operating in Queensland for the past 23 years and has become a leader in the design and manufacture of Odour Control Filter Units and 4-Side Void Protection Safety Access Covers. McBerns’ Engineering and Operations team has over 100 years of water industry experience collectively and is capable of providing technical expertise and support in odour management. McBerns is also able to design and manufacture a wide range of safety access covers for the water/ wastewater industry and private sector. The smallest of the Edur ‘Multiphase’ range. Zulauf Schmutzwasser Inflow Waste-water Luft Air Kompressor Compressor Luft Air Standardpumpe Standard pump Flotat Flotate Feststoffe Solids Ablauf Effluent EDUR Mehrphasenpumpe EDUR multiphase pump Lösestrecke Solution Line Lösestrecke Solution Line Schematic of the Edur® Multiphase pump.
Water and CSG
Water Journal June 2015