Hire a consulting engineer ...

Published by Thomas Wilson, OWNER

Hire a consulting engineer who specializes in wastewater treatment. Most  domestic  plants are activated  sludge, but  circumstances ( size, location , availability of  raw  materials , effluent  requirements, existing  facilities, local  costs  etc) could dictate other  choices. MOP 8 published  by WEF discusses  options. N & P  are  normally important  only if  effluent  requirements  include them.