1. Sludge and bioslurry; the profit is in the pudding!
Poleko 2012
21st of November 2012, Poznan
By Håkon Rognlien, Area sales manager, Cambi AS
Cambi AS
Skysstasjon 11A
Pb 78
N-1371 Asker
Norway
www.cambi.com
E-mail: office@cambi.no
Tel: +47 66 77 98 00
Fax: +47 66 77 98 20

2. CAMBI’S BUSINESS AREAS
Biosolids:
Plants for enhanced biogas production from municipal & industrial
sludge
Biowaste:
Plants for biogas fertilizer from source-separated organic waste
Biorenewables(not commercial):
• Biogas production from organic residues
• Ligno-cellulosic biomass pre-treatment for bio-ethanol & biogas
Operations:
Cambi Operations provides support and operation services to
maximize plant performance

3. CHALLENGE AND SOLUTION
• Overloaded digesters?
• Biological sludge difficult to dewater?
• Class /Grade A requirements?
• High disposal costs?
• High temperature
• High pressure
• Steam explosion
• CAMBI!

4. DECISION MAKING CRITERIAS
Disposal
Odour
Costs
Operational Biogas
Costs
Digester Plant
Odour
Volume payback
Plant Product
Footprint Quality
Carbon
Footprint

5. BIG CITY WWTP EXAMPLE - CAPEX
• 800 000 million p.e. sludge, or a mixture of sludge and slurry
• Yearly total dry solids ~19 000 tons
• Investment savings on digesters alone: € 3,2 millions

6. BIG CITY WWTP EXAMPLE -EXTRAS
• Add 2,8 mill € for THP
• Then add € 600 000 for extra costs from larger steam boiler, coolers, fundaments
etc, and you have about the same capex as conventional digestion.

7. BIG CITY WWTP EXAMPLE - OPEX
Every year deduct disposal cost of 19 000 tons
rest product (€ 570 000 / year)
Then add income from more
than 2 million m3 worth of
biogas (12 millon kWh)
• Add the pleasure of dealing
with much better, pathogen
free, drier and less smelly
rest product! 

8. BIG CITY WWTP EXAMPLE - SUMMATION
• Smaller digesters saves investments
• Thermal treatment ensures pathogen and disease free rest
product (+ fertilizer for farmland)
• Higher biogas yield guaranteed
• Better VS reduction ensures less cost on rest product
• Better dewatering capabilties also ensures less cost on rest
product
• Process limits smell considerably
• Double capacity in existing digesters

9. HOW DO WE PROCEED?
Thank you
for your time!