I think it's the potassium they are after. I know the main source of potash these days is from mined marine deposits. I just have concerns regarding the PAHs, and the accumulation of PAHs from constant burning and spreading ash over the years.
Regards
Christopher Taylor
Enforcement Officer
Regulatory Services
Brent Council
Tel: 020 8937 5159
www.brent.gov.uk
-----Original Message-----
From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Clive Williams
Sent: 21 April 2015 09:01
To: [log in to unmask]
Subject: Re: Wood ash vs coal ash
I would imagine the conc of PAH would be much higher in coal ash given the massive concentration factor in a 1m seam of coal coming from up to 30m of plant stuff depending on the type of coal.
What is the benefit of wood ash spreading, is it the phosphorous? that you can extract from wood ash by soaking it.
Cheers
Clive
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