Covering Slurry lagoons??? Good thing or not???

[davidroberts30]

We add the acid pre-separator in a mixing tank, so we stop ammonia loss from the solids as well. The issue is then it tends to clump the fibres, making it hard to pump. We have found that only a piston pump (e.g. Houle) can cope after many tries.

It was supposed to be 5 kg/m3, but I find it to be about 16 kg to get to pH5.5 on our digestate. It will depend on the starting pH (we are about 7.8) and the buffering capacity of the slurry. We cannot get any more second user acid at the moment, and virgin acid is up to £750/tonne which makes it uneconomic.

I've seen 96% acid in ibc for 600

 

[sjt01]

I've seen 96% acid in ibc for 600

Second user stuff was coming in at £110 in IBC, so that is my target

 

[davidroberts30]

Second user stuff was coming in at £110 in IBC, so that is my target

didnt know that was a thing

 

[Bogweevil]

What do people think about putting floating covers on slurry lagoons? Good thing or not?
View attachment 828390

Old news, the most advanced people are using floating solar panels now, killing two stones with one bird.

 

[Janet Hughes Defra]

Anyone on here involved in the DEFRA Co-design on slurry/ammonia? I know @Janet Hughes Defra is very busy at the moment but it would be great to get an update on the direction of travel on all of the clean-air/slurry stuff

Yes, we're going to publish an update about this early next year

 

[cozzie]

Second user stuff was coming in at £110 in IBC, so that is my target

what process has it as a by product?

 

[sjt01]

what process has it as a by product?

Final stage industrial drying

 

[HGDickson]

Hi, I hope you don't mind me responding on here. I'm just wondering if anyone is located in Cornwall with a covered slurry pit? I am currently doing a research project for my Masters course and am seeking a covered slurry pit in Cornwall! If anyone is located down this way I would really appreciate it if you could give me a message! Many thanks

 

[stirrer]

I hope you will compare the crust covering a store reducing emissions and the use of covers.
obviously stirring covered lagoons is not easy compared to uncovered crust covered lagoons.

 

[HGDickson]

I hope you will compare the crust covering a store reducing emissions and the use of covers.
obviously stirring covered lagoons is not easy compared to uncovered crust covered lagoons.

I will be comparing ammonia emissions around a covered (hopefully!), uncovered and methane capture slurry pit. The uncovered slurry pit will have a crust so i hope to capture this in my data if i can also find a covered pit

 

[som farmer]

well, we will find out next week.

the dreaded EA inspection/and suggestion visit.

Thought/hoped we would have avoided one, having had a jobsworth EA inspector, trying to catch us out, on NVZ and storage, for 18 months, and fail.

not a lot to worry about, if to much to do, cows will depart, simple.

 

[crashbox]

Yes that is why I am asking. Trying to see what people really think of them both good and bad. I am dealing with some IPPC pig farmers at the moment who are having to cover there lagoons and they are not over the moon about it. However truth be told it looks like it is something that is going to be pushed on dairy industry as well as it looks like all dairy units over 150 head will fall under IPPC rules.

IPPC = Integrated Pollution Prevention and Control?

Many dairy farmers are adding water back into their lagoons to enable stirring and utilisation on grassland (thick slurry cannot be pumped, blocks low emission spreaders (trailing shoe, dribble bar) and can kill grass swards in lines if you try to use such spreaders.

Cost benefit unlikely justifiable in many circumstances unless legislation moves to make it compulsory (in which case you have to weigh up against stopping business).