Proceedings

High Performance sludge dewatering for drinking water plants with the Bucher Hydraulic Filter Press

Mischler, J-F. – Bucher Unipektin AG

(free)

Why a Bucher Hydraulic Filter Press for Sludge Dewatering?

Bucher presses provide a new superior technology for processing municipal and industrial sludges to yield filter cake with the lowest possible moisture content. The complete press is slowly rotated in order to loosen and crumble the filter cake thus achieving a superior performance and efficiency. Using common additives, sludge may be mechanically dewatered to the limit that is technically possible. With the Bucher press, the maximum
possible dry substance content is achieved for raw, digested, thermally or chemically treated waste water sludges and this is also the case for all drinking water sludges.

What are the performances and key benefits of a Bucher Hydraulic Filter Press on drinking water sludge?

The dewatering of drinking water sludges is a worldwide challenge, as drinking water sludges generally provide only limited results on decanters and filter presses. They usually only work well when the lime amount in sludge is over 20%. A good performance is furthermore linked to a low algae content of treated surface water.
With the Bucher press one attains the maximum dewatering and thus achieves the best possible results in dry substance content of the dewatered filter cake. In many cases the Bucher HPS press is able to dewater drinking water sludges to over 40% DS without lime addition.
The Bucher press allows to reach the best possible dewatering performances on all kind of drinking water sludges with all usual conditioning methods even for desalination plants or during algae periods.
Lime addition is not a must for the Bucher HPS press and by avoiding lime addition the sludge cake volume can possibly be halved in comparison with other technologies.
The sludge conditioning therefore can be adapted to the final sludge disposal routes and not the other way round. Options are for instance landfill (cover layer) and cement works as well as outlets for spreading and composting.
The paper highlights as well first industrial scale results of new installations of Bucher HPS presses in drinking water plants.

The Biosolids conference attracts the most authoritative global experts in the area of biosolids and organic resource handling, treatment and recycling. The programme covers both the latest innovations and updates of existing technologies. Presentations from respected industry experts and newcomers follow the development of technologies and legislation from inception to full-scale installations.

The conference regularly gathers over 200 delegates from all over Europe, many of them return every year both for the technical presentations and fantastic networking opportunities.

Regular conference themes include:

• Thickening and Dewatering
• Modelling Sludge Handling and Utilisation
• Commissioning and Operating Experiences with Thermal Hydrolysis
• Tackling Potential Odour Problems
• Operating Experiences and Potential Problems in Digester Operation
• Ensuring Optimum Energy Recovery from Biogas
• Liquor Treatment and P Removal
• Alternative Products from Sludge
• Enhancing the Value of Biosolids and Digestate
• Pathogens and Pollutants In Digestate
• Sharing Experiences

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