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Low-maintenance sludge scraper launched
STRIAL NEWS
Low-maintenance sludgescraper launched A sludge scraper system new to Britain, and claimed to require minimal maintenance, is being introduced by Sevem Water Services of Kidderminster, which specialises in water treatment and liquid waste disposal equipment. The hydraulic sludpa scraper
was developed in Sweden by Sevem’s sister company Zickert and nearly 200 are now in operation in Scandinavia, Australia and Malaysia. The scraper is used in rectangular tanks on primary and secondary sludges in the treatment of municipal sewage and industrial effluent. A series of triangular scraper blades, located on glider bars at the bottom of the tank, are
moved alternately forwards and backwards by an automatic low-pressure hydraulic pump unit. The forward stroke of approximately 700 mm pushes the sludge towards the well; the return stroke, at a third of the speed of the forward stroke, creates a minimum of turbulence. It is claimed that no other type of sludge scraper has such a small number of mechanical components. This, together with the fact that the few submerged parts are made of stainless-steel, means that very little maintenance is required. The hydraulic scraper is claimed to produced a high consistency of sludge. Any size of flat-bottomed rectangular tank can be equipped with this system and those already in operation range from 4 x 3 to 63 x 8m. Severn Water Services, Frederick Rd, Hoo farm Industrial Est. Kidderminster, 7RA, UK.
Worcs.
DYll
Minnesota’s Entrepreneurof ‘91 President and CEO of Osmonits, Mr D. Dean Spatz has been named Minnesota’s Entrepreneur of the Year for 1991 in the High Tech/Medical category. He was one of 87 individuals nominated statewide for this award and will now enter the national competition. Conducted by Inc. Magazine, the event recognises individuals who have started and built successful enterprises. Osmonics originated from an engineering class project that Mr Spatz was assigned as an undergraduate at Dartmouth Collegein 1964.Theaimwast.o discover how to supply people of the world with drinkable water. His interest in the concept
continued
and
in
1969, in an effort to commercialise developments in reverse osmosis, nanofiltration and ultrafiltration, he started Osmonics in his garage. 5957,
Clearwaler
Drive. Minnetonka,
Osmonics,
Minnesota
55343, USA.
Membraneresearch
Cartridge filters from different manufacturers may fii the same housings, but that doesn’t make their performance interchangeable. Compared to other filters, only HMREX@ II filters have true graded dcnslty*. resulting In higher flow rates, longer service life and the lowest media mlgratlon.
That’sbecause HYTREX II fllters are manufactured from continuous, pure
_ _
polypropylene microfibersthat are thermally-bonded into a complex matrix. HYTREX II filters are not wound from yarn, with added lubricants and anti-staticagents. They’re not molded from chopped fibers, with chemical binders. And they’re not layered from non-woven microfibers.
--
For the inside story on how HYTREX II provides superior performance over other cartridge filters that claim to be depth filters, ask for our free brochure.
--
‘HYTREX graded densky paw-U Is 3.904.798 and 3.801.4CO
The Separation Processes Centre based at Exe& University recently received a grant of f260000 from Unilever, and the Science and Engineering F&search Council. This will be used to finance a membrane research project spanning three years. It is hoped to use membrane technology to both improve the quality of waste streams that are produced by the detergent, health care and cosmetics industries and reclaim valuable chemicals. Commercially available inorganic and polymer membranes are being used in the work, sometimes with specially applied surface treatment. Through an understanding of surfactant phase transformations at the membrane surface (or its pores), it should be possible to select appropriate membrane types for use in large scale installations. The selection process identifies the correct choice of operating conditions resulting in acceptable dltration/separation rates. School of Engineering, University
-
-
1-800~~1750,ext.300
..
-
ws
-
Telephone:612/933-2277 Telefax:612/9330141 Telex:29.0647
5951 Clearwater Drive Minnetonka, Minnesota 55343 USA -
of Exeter, North Park Road, Exeter, Devon EX44QF, UK. JanuarylFebrl
y 1992
FIRratIon 6 Separation
Low-maintenance sludgescraper launched A sludge scraper system new to Britain, and claimed to require minimal maintenance, is being introduced by Sevem Water Services of Kidderminster, which specialises in water treatment and liquid waste disposal equipment. The hydraulic sludpa scraper
was developed in Sweden by Sevem’s sister company Zickert and nearly 200 are now in operation in Scandinavia, Australia and Malaysia. The scraper is used in rectangular tanks on primary and secondary sludges in the treatment of municipal sewage and industrial effluent. A series of triangular scraper blades, located on glider bars at the bottom of the tank, are
moved alternately forwards and backwards by an automatic low-pressure hydraulic pump unit. The forward stroke of approximately 700 mm pushes the sludge towards the well; the return stroke, at a third of the speed of the forward stroke, creates a minimum of turbulence. It is claimed that no other type of sludge scraper has such a small number of mechanical components. This, together with the fact that the few submerged parts are made of stainless-steel, means that very little maintenance is required. The hydraulic scraper is claimed to produced a high consistency of sludge. Any size of flat-bottomed rectangular tank can be equipped with this system and those already in operation range from 4 x 3 to 63 x 8m. Severn Water Services, Frederick Rd, Hoo farm Industrial Est. Kidderminster, 7RA, UK.
Worcs.
DYll
Minnesota’s Entrepreneurof ‘91 President and CEO of Osmonits, Mr D. Dean Spatz has been named Minnesota’s Entrepreneur of the Year for 1991 in the High Tech/Medical category. He was one of 87 individuals nominated statewide for this award and will now enter the national competition. Conducted by Inc. Magazine, the event recognises individuals who have started and built successful enterprises. Osmonics originated from an engineering class project that Mr Spatz was assigned as an undergraduate at Dartmouth Collegein 1964.Theaimwast.o discover how to supply people of the world with drinkable water. His interest in the concept
continued
and
in
1969, in an effort to commercialise developments in reverse osmosis, nanofiltration and ultrafiltration, he started Osmonics in his garage. 5957,
Clearwaler
Drive. Minnetonka,
Osmonics,
Minnesota
55343, USA.
Membraneresearch
Cartridge filters from different manufacturers may fii the same housings, but that doesn’t make their performance interchangeable. Compared to other filters, only HMREX@ II filters have true graded dcnslty*. resulting In higher flow rates, longer service life and the lowest media mlgratlon.
That’sbecause HYTREX II fllters are manufactured from continuous, pure
_ _
polypropylene microfibersthat are thermally-bonded into a complex matrix. HYTREX II filters are not wound from yarn, with added lubricants and anti-staticagents. They’re not molded from chopped fibers, with chemical binders. And they’re not layered from non-woven microfibers.
--
For the inside story on how HYTREX II provides superior performance over other cartridge filters that claim to be depth filters, ask for our free brochure.
--
‘HYTREX graded densky paw-U Is 3.904.798 and 3.801.4CO
The Separation Processes Centre based at Exe& University recently received a grant of f260000 from Unilever, and the Science and Engineering F&search Council. This will be used to finance a membrane research project spanning three years. It is hoped to use membrane technology to both improve the quality of waste streams that are produced by the detergent, health care and cosmetics industries and reclaim valuable chemicals. Commercially available inorganic and polymer membranes are being used in the work, sometimes with specially applied surface treatment. Through an understanding of surfactant phase transformations at the membrane surface (or its pores), it should be possible to select appropriate membrane types for use in large scale installations. The selection process identifies the correct choice of operating conditions resulting in acceptable dltration/separation rates. School of Engineering, University
-
-
1-800~~1750,ext.300
..
-
ws
-
Telephone:612/933-2277 Telefax:612/9330141 Telex:29.0647
5951 Clearwater Drive Minnetonka, Minnesota 55343 USA -
of Exeter, North Park Road, Exeter, Devon EX44QF, UK. JanuarylFebrl
y 1992
FIRratIon 6 Separation