05 March 2015 | Online since 2003



13 June 2014|News

AD operators wrong to run pumps into the ground – say Landia


According to Landia, who will be at UK AD & Biogas on July 2 & 3, (Stand B001), the increasing amount of improperly shredded food waste and inevitable contaminants in domestic green bin waste mean that only the very toughest pumping and mixing equipment – designed for purpose – can meet the industry’s demands.

“Mass-produced, bog-standard propeller mixers don’t last very long at all in AD environments”, says Landia’s Paul Davies. “We now see some operators just running their pumps into the ground because it’s actually cheaper to replace them completely than get at them to carry out maintenance. This can be the case for any type of mixing system that doesn’t allow you to carry out a service from outside the tank. Externally-mounted units have huge operational and safety benefits. Everything is at ground level, so there’s no working at heights. Nothing is in the gas-zoned area, so there’s no need for breathing apparatus. To maintain equipment such as submersible mixers, there’s no option other than to climb up, peel back the lid of the digester and purge the tank, which is extremely costly and time-consuming”.

He added: “Small submersible mixers will often be running flat out, lasting two years or much less - compared to a chopper pump that can last 25 years. You’d think energy savings would be at least part of most AD operators’ decision making, but that’s not always so. Three 30kW pumps doesn’t automatically mean 90kW hours because they might only need to run for a maximum of fifteen minutes per hour”.

Landia GasMix at Cory's first AD Plant



Davies also points to the rising amount of acidic food waste being used as feedstock that corrodes cast iron equipment – and food waste that contains plastics from packaging that can also cause problems without the right processing or sufficiently strong pumps and mixers to handle it.

“Over-shredding of plastics will make particles too small to be screened out”, he says, “But under-shredding can create a floating mattress of plastic in the digester, which will see gas production reduce and then eventually have to stop so that someone has to go in manually and remove it all. AD downtime isn’t something you want. Lost revenue can amount to thousands of pounds per day - and a problem with fulfilling your contract to the energy provider”.

Founder ADBA members Landia will be promoting their externally-mounted GasMIx system during UK AD & Biogas at the NEC (July 2 & 3). GasMix is already in use at Cory’s first AD plant.

www.landia.co.uk
info@landia.co.uk
01948 661 200


Download



Comments


No comments posted yet. Be the first to post a comment

To post comment without approval login or register

Display name

Please enter your name

Email (optional)
Comment

Please enter your comment

Post Comment

Your comment submitted successfully.Please wait for admin approval.

Some error on your process.Please try one more time.



Jobs


2 March 2015
Salad and Watercress Packer
We have vacancies available within our Packing Department at our farm at Waddock Cross, 7 miles east of Dorchester....

4 March 2015
Legal Secretary - Real Estate
The Legal Secretary will need to hit the ground running and will involve varied duties such as drafting letters, dairy manage...

4 March 2015
Counter/ Food Service Assistant
For example, nut, dairy or wheat allergies. To provide excellent customer service from food service counters in a busy presti...

3 March 2015
Network and Flood Modeller
Wind Farms, Roads Schemes, & Mini Hydro Schemes. We are currently recruiting for an experienced Network and Flood Modelle...

16 February 2015
assistant Manager
Job Roles include Day to day pub management Delivering high levels of customer service Maintaining company standards Ensuring...




Top stories you may have missed
2 February 2015 | Arable
Is EU membership damaging UK farming?

Is EU membership damaging UK farming?

Membership of the EU is damaging the British farming industry, according to...


29 January 2015 | Machinery and Equipment
Drones 'rapidly changing' agriculture

Drones 'rapidly changing' agriculture

BASIS has launched an accreditation for pilots of Unmanned Aerial Systems (...


23 January 2015 | Arable
UK wheat yields have potential to double

UK wheat yields have potential to double

UK wheat yields have theoretical potential to more than double over the nex...


23 January 2015 | Machinery and Equipment
Crowds flock to LAMMA 2015

Crowds flock to LAMMA 2015

Britain’s farmers flocked to Peterborough for the first day of LAMMA’15 to ...


22 January 2015 | Cattle
Don't blame supermarkets for milk crisis...

Don't blame supermarkets for milk crisis...

The crisis in the dairy industry is not the fault of supermarkets, accordin...


16 January 2015 | CLA
Families affected by HS2 face 'major wor...

Families affected by HS2 face 'major wor...

Transport Minister Baroness Kramer visited three rural businesses in Cheshi...


16 January 2015 | Machinery and Equipment
John Deere unveil new 6R tractor range

John Deere unveil new 6R tractor range

Spearheading the John Deere range of mid-size tractors from Mannheim, the n...


14 January 2015 | Animal Health
Monthly TB checks more effective than ba...

Monthly TB checks more effective than ba...

Regular testing for bovine TB could significantly reduce the number of infe...


12 January 2015 | News
Government regulations hampering UK agri...

Government regulations hampering UK agri...

Single-issue policy-making threatens to hamper, not help, the progress of U...


8 January 2015 | Cattle
2015: The year ahead for the beef market

2015: The year ahead for the beef market

2014 has been a “rocky old year” for the beef industry but better prices ar...