drainfield diagram on white background. effluent absorption and purification scheme.

absorption background clean diagram dirt dirty disposal drain drainage drainfield effluent field filter filtration gravel ground groundwater illustration infographic isolated layer layers leach leachfield leak liquid part pipe pipeline plant plumbing pollution purification rock scheme scum section sedimentation septic sewage sewer sewerage sludge soil stock stone subsoil system treatment trenches tube underground vector waste wastewater water white