
	Search edie for

News Jobs Suppliers Products edie+ Training Awards Consultancy Events Tenders Networking TV Conference
About us Feedback Register Contact Advertise Editorial Finditforme	Publications Partners Links Discussions Quiz

CRC on DVD

Six Experts, One Disk

All you need to know about the CRC on one handy DVD

Most read news | Latest Comments | Hot Jobs

ť New civil enforcement powers for green watch...
ť Winter Olympics get bronze for environmental...
ť 'Clipper in the clouds' concept attracts cor...
ť Salmon spawning grounds polluted by fishery ...
ť Benn: consign waste to the dustbin of history
ť America aims for energy independence

Edie Daily

Take full advantage of the speed of the web and subscribe to our free daily news updates

ť edie Ireland
ť Resource Centres ť Sustainabilitylive!

Site Sponsor

To see all site sponsors, click here

Latest Poll

US cuts green watchdogs funding is this a sign of things to come?

Supplier Links

ť Sludge Handling and Treatment

24 November 2009

Dewatering Sludge

Click here to enquire about this story

News Release

Dewatering Sludges is probably the most costly and onerous task on any effluent treatment plant.

Problems such as maintenance, noise, odour, gas zone, Site cleanliness, floc handling, and cake disposal are part and parcel of a days work in the sludge house. Added to this the OPEX and whole life costs create more headaches for the Plant managers. At Huber we have been reviewing these problems and a have addressed some of these with the Screw Press.

Solution to Problem 1-Maintenance

Operating at 3-6 RPM the wear is considerably less than a Centrifuge at 3400 RPM approx.

<10% of the power requirement of Centrifuges, smaller drive and bearings.

All stainless construction reduces corrosion.

Few moving and wearing parts reduces downtime.

Gull wing covers under no pressure allow good accessibility.

Flexibility in operation as multiple units can be used.

Less weight and vibration therefore smaller foundations

Solution to Problem 2 -Noise

Lower operating speed.

Less vibration than centrifuges.

Lower power.

Spray bars inside covers.

Solution to Problem 3- Odour

Totally enclosed casings which can be kept under low negative pressure.

Bagging units available to enclose cake.

Aerosols from washing are contained.

Solution to Problem 4-Gas Zone

There is no solution to this problem. However the area will be cleaner and the screw press will generally produce less odour.

Solution to Problem 5-Site Cleanliness

Totally enclosed to keep sludge inside press unlike Belt Presses.

Good filtrate drainage, at the lowest point of Press.

Elevated discharge therefore conveyors are not always necessary to transport the cake to the skip or storage area.

Wear parts are on the outside of drum inside covers.

Wash spray /splash back contained inside covers

Solution to Problem 6-Polymer Consumption

Consumption is 5-20% lower than that associated withCentrifuges as there is little shear on the floccs to break them down.

Liquid polymers may be used to reduce dust and mixing requirements

Solution to Problem 7- Cake Discharge

Comparable moisture content in most cases.

Elevated discharge under gravity to drop straight into a skip.

Positive discharge requiring no scrapers or carry over.

Solution to Problem 8- OPEX

Lower power.

Less Polymer.

Lower carbon emission.

Less operator attendance as plant is fully automatic.

Less maintenance.

Less corrosion.

Solution to Problem 9- Whole Life Costs

The CAPEX is comparable however recent independent reports have shown that the savings in power, flocc and OPEX make the Screw Press a very good whole life investment.

Conclusion

Whilst Huber cannot resolve all of the problems in the sludge house the Screw Press has considerable advantages over other sludge Dewatering technologies such as Centrifuges, Filter Presses and Belt Presses.

Tony Clutten

Process Sales Manager
Huber Technology

E-mail tc@huber.co.uk
Tel 01249 765050

For further information please email Huber Technology

Send to a friend

Printer friendly

Link to this page

Comment

Source: Huber Technology

Related Media

ť The RecycleBank Journey

Terry Gould from the Royal Borough of Windsor and Maidenhead and Meeta Gourney UK director of RecycleBank explain how the scheme is working.

ť WRAP on behaviour change

WRAP's chief executive, Liz Goodwin, on behaviour change.

ť Alan Whitehead MP

Labour MP Mr Whitehead talks about the Recycled Content Bill he pushed through Parliment.

ť See more

RSS

ť What is RSS?
ť List of RSS feeds
ť Social networking
ť News on your site?

News Jobs Suppliers Products edie+ Training Awards Consultancy Events Tenders Networking TV Conference
About us Feedback Register Contact Advertise Editorial Finditforme	Publications Partners Links Discussions Quiz

Other Faversham House Websites include
edie Ireland | Copenhagen Climate Talks, COP15 News | Environment Awards

Channel Homepages