UKTC Archive

Re: Biodisc effluent - impact to trees?

Subject: Re: Biodisc effluent - impact to trees?
From: Michael Richardson
Date: Dec 21 2017 13:53:34
Check this article out:

It might give you some ideas of where to start.

Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care


On Thu, Dec 21, 2017 at 7:25 AM, Ben Maxted <> wrote:

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

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

On 21 Dec 2017 10:20, "Igoea, Andrew" <> wrote:

Hi All,

Has anyone had experience with assessing the impact of discharging
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


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