UKTC Archive

Re: Biodisc effluent - impact to trees?

Subject: Re: Biodisc effluent - impact to trees?
From: Wayne Tyson
Date: Dec 21 2017 18:31:56
As I recall, the Dutch had a "bioremediation" program going with willows
many years ago. I believe they burned the wood and retrieved the heavy
metals, but I could be wrong.

Wayne



On Thu, Dec 21, 2017 at 10:27 AM, Rupert Baker <rupert_baker@xxxxxxxx.co.uk>
wrote:

Trees can cope with high levels of heavy metals - but perhaps not as a
sudden input if they have not grown and adapted to the site.  Foresting
contaminated land is a way of reducing the load of such pollutants, as they
are absorbed and laid down in the wood of trees. -ok if you use the wood
for construction, not so good if it is burned at the end of the cycle.
Look up bioremediation on line
Rupert

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info [mailto:uktc-request@lists.
tree-care.info] On Behalf Of Ben Maxted
Sent: 21 December 2017 12:25
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Biodisc effluent - impact to trees?

It's the heavy metal content of human sewage sludge that was the main
threat as I recall,fading and selective memory notwithstanding!

This was one of the reasons t fell out of favour for treating agricultural
land.

Any change in pH and nutrient values will likely affect the micro and
macro biology of the site. Perhaps the change wont be drastic if it is not
a SSSI or similar

I would get a lab test done on a sample for heavy metal content.

I expect Newton Rigg/University of Lancaster might be able to help?
Contact Andrew Leslie he is a good chap and is likely to help but I expect
the research has been done by good old Forest Research and Defra,good luck

Murky Solstice to one and all
Ben

On 21 Dec 2017 10:20, "Igoea, Andrew" <Andrew.Igoea@xxxx.im> wrote:

Hi All,

Has anyone had experience with assessing the impact of discharging
biodisc effluent (treated sewage) into the rooting zone of trees?

The treated effluent will contain 10mg/L suspended solids and 3.8mg/L
ammonia, and will have a BOD of 10mg/L. The output could be between
1-2 cubic metres per day.

The treatment facility is at the top of a steep bank and the trees are
below it.

I know the proposal will impact the moisture content and chemical
composition of the soil, which could impact the mycorrhizal
associations and soil fauna, but will it have a significant
detrimental impact on the trees?

Regards,

Andrew Igoea  | Arboricultural Officer Forestry, Amenity and Lands
Directorate | Department of Environment, Food and Agriculture Thie
Slieau Whallian | Foxdale Road | St Johns | Isle of Man | IM4 3AS
TEL:  (+44) 01624 XXXXXX | MOB: (+44) 07624 XXXXXX | E-MAIL:
andrew.igoea@xxxx.im<mailto:andrew.igoea@xxxx.im>



Isle of Man. Giving you freedom to flourish


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The UKTC is supported by Bosky Trees arboricultural consultancy
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