Not sure I understand your ...
Published by Dave Johnstone
Not sure I understand your intent so sorry if I have it wrong. You remove solids, (Poly aides removal) then you want to slurry with treated effluent and add to digester? You don't mention what type of digester you have but if this is an IC then there is risk you will wash out, damage the sludge structure and seriously reduce the performance, reducing biogas & increasing discharge COD. On the other hand other constructions can tolerate some level of solids but quantity and nature of solids is important.
Reducing the efficiency of removal of solids (less poly) or bypassing some flow from solids separation will have a similar effect simplifying your process. Another option is to consider a solids digester - long process time, risk of managing the ammonia and capex.. But some savings in more biogas, less to mass for downstream management.. Have fun..
1 Comment
It will be an Anaerobic Digester. At this stage it is an idea to feed this sludge to the Digester but I am worried that Poly in already in the Sludge that will feed the Anaerobic digester might influence biogas yield. I was thinking that the design or sizing of the Digester should be consider the Poly as well...maybe a longer time in the digester.
Published by Ghoewylah Darries, Process Engineer at NuWater