sewage heat pump issue

[Abby Normal]

Yep, the sewage was the clarified effluent discharge.

Sweden does have a very large heat pump system which uses centrifugal compressors in the heat pump. Basically, it is just a big centrifugal water chiller.

On the bio-gas system... Was this being used for co-generation and combustion turbines? There might be some refrigeration required to condition (dehumidify) the methane before it is used. Have worked on some of these too.

The Biogas was from manure on a large dairy farm maybe 3,000 head.

It was treating the waste and producing the gas to replace propane. They seemed to find ways to use up as much of the biogas as they could but ended up burning a lot of it off.

They added greenhouses and heated with biogas, they ran stills made enthanol, but I do not rexall them generating electricity with it.

A starch plant in my hometown was forced to treat their effluent. They used an anerobic digestor to treat the waste and appease environmental concerns. It produced a substantial amount of gas, but it did not pay for itself. Was a smaller scale than 3000 crapping cows I guess.