My Biolectric 52kw AD Plant

[Chippy]

Biolectric have said 35c to us

Well when I log into my biolectric account, it says target temp is 42 on there

 

[Kirk]

Well when I log into my biolectric account, it says target temp is 42 on there

I'll ask them today.

 

[Chippy]

One I saw in Staffordshire had the farms biomass boiler connected to get it going? My biolectric already has a heat exchanger fitted.

I've got one of the first plants brought over to the UK so they have changed since. The stirrer has changed and now they pre heat slurry on its way in where as mine is heated once it's in there.

 

[Kirk]

Oh ok.

 

[Kirk]

are those temperatures to low to sterilize the slurry?
ad would be good if could kill weed seeds and bugs in the slurry

Would you need pasteurise to do that? Maybe could add one onto the system after if comes out the digester?

 

[Mucktogold]

Would you need pasteurise to do that? Maybe could add one onto the system after if comes out the digester?

Yes, you need 70C for an hour to meet EA rules

 

[Mucktogold]

Was Portagster supposed to finish it, have it running at 52KW or whatever it needs to get ROC?

 

[Mucktogold]

I don't want my experience with Portagester to put people off buying off Dairy energy/Solcap because there great company's to deal with. They now have better installation teams working for them

Sounds terrible, who else is owed money?

 

[Mucktogold]

Yes it's all in the container. Not separating it know but was tempted. Currently milking 150 but fairly sure it's not enough but won't know until it's up to full production which could take 2-3 month. When my dry cows and youngstock are houses then there's enough slurry. It's just summer when I may not have enough. It's slurry only but can also put whey in

If 120 cows make 5 tons slurry a day. Looking at cow slurry to biogas tables on Google, a tonne of slurry makes 25 to 27 cube metres gas, so you will need about 25 to 30 tons day for 52 KW so we could need to have 600 to 720 cows on zero grazing!

 

[thesilentone]

Would you need pasteurise to do that? Maybe could add one onto the system after if comes out the digester?

Yes, you need 70C for an hour to meet EA rules

To sterilize you need 140 degrees C.

To pasteurise 70 degrees one hour.

However the question was regarding the kill of weed seed and pathogen, and the answer is no, you do not need to do either, as the retention period in the tank at 40 degrees will be sufficient for most. (not all)

see: http://www.wrap.org.uk/sites/files/wrap/The effects of AD on common crop pests diseases.pdf

 

[Mucktogold]

Some of the farmers who I don't know apparently are still waiting for equipment to show up

Did you read about this on forums?

 

[Mucktogold]

No it's just what I've heard from a reliable source [emoji6]
I'm getting the feeling you work for Portagester? [emoji23]

We were thinking about getting one. Interesting to read the forums and to see things in black and white.

 

[Duncan Peters]

interesting conversation, would you mind if we joined in we have had 2 digesters from portagester there own design and they work beautifully if fact from our point of view no one else came close, just shows you there all ways 2 sides to these things, however we do a fair amount of contracting in the south west and there's quite a few of these small digesters not working did you say they were Bioelectric ? if so we have come across at least three that have packed up after working for six months or so apparently the funders are looking in to getting there clients money back something to do with the stirring bits they keep braking down

 

[Mucktogold]

interesting conversation, would you mind if we joined in we have had 2 digesters from portagester there own design and they work beautifully if fact from our point of view no one else came close, just shows you there all ways 2 sides to these things, however we do a fair amount of contracting in the south west and there's quite a few of these small digesters not working did you say they were Bioelectric ? if so we have come across at least three that have packed up after working for six months or so apparently the funders are looking in to getting there clients money back something to do with the stirring bits they keep braking down

Did portagester design and build their own or just assemble someone else's?
We have 150 cows and cannot get anywhere near gas for 40KW or even 52 KW (to get ROC's). Nearly all the biogas yields on the internet are 25 to 30 cube meter from 1 ton cow slurry so we'll have to treble the herd size? Or breed bigger cows!

 

[Chippy]

There's a reason why it's annoyed me so much which is because the exact same thing happened to me when I bought my dragon heat boiler but that was worse because they went bust as well

 

[Chippy]

This shows what my slurry will produce from the sample I had analysed. Bear in mind there's no water in my slurry and my cows are nearly doing 11000 litres so I'm estimating in summer I'm either going to need almost 200 cows or I'm going to have to add whey or another sort of additive to make up for lack of cows. In winter I have all my youngstock slurry also going in so I have plenty then.

 

[Chippy]

Did portagester design and build their own or just assemble someone else's?
We have 150 cows and cannot get anywhere near gas for 40KW or even 52 KW (to get ROC's). Nearly all the biogas yields on the internet are 25 to 30 cube meter from 1 ton cow slurry so we'll have to treble the herd size? Or breed bigger cows!

They assembled someone else's or attempted to I should say [emoji23]

 

[Duncan Peters]

Portagester designed and built there own we have a O&M agreement which also is top notch cant fault them,

re your feed stocks I believe your right gas wise did you get the sample tested ??? when you did your calculations what figures did you use ???? max or low gas yield's

yes we had some issues regards biomass install doesn't sound like as bad as you though we only have a small unit what size did you plumb for in the end with 150 milking

 

[Duncan Peters]

there's not many of yours out there or is there don't know to much about them

 

[Chippy]

No there's not many but I'd say there's at least 15 by now. Yes I got it tested. I just used a figure of 45 m3 of gas per tonne of slurry I think