© Presby Environmental, Inc., Maine Design & Installation Manual, June 2019 Edition -3-
2.0 Ten Stages of Wastewater Treatment
The Presby Wastewater Treatment System's
10 STAGES OF TREATMENT
Advanced Enviro-Septic (AES) and Enviro-Septic (ES)
Stage 1:
Warm effluent enters the pipe and is cooled to ground temperature.
Stage 2:
Suspended solids separate from the cooled liquid effluent.
Stage 3:
Skimmers further capture grease and suspended solids from the existing effluent.
Stage 4:
Pipe ridges allow the effluent to flow uninterrupted around the circumference of the pipe and aid in
cooling.
Stage 5:
Bio-Accelerator
®
fabric screens additional solids from the effluent, enhances and accelerates treatment,
facilitates quick start-up after periods of non-use, provides additional surface area for bacterial growth,
promotes even distribution, and further protects outer layers and the receiving surfaces so they remain
permeable. (AES only)
Stage 6:
A mat of coarse, randomly oriented fibers separates more suspended solids from the effluent.
Stage 7:
Effluent passes into the geo-textile fabrics and grows a protected bacterial surface.
Stage 8:
Sand wicks liquid from the geo-textile fabrics and enables air to transfer to the bacterial surface.
Stage 9:
The fabrics and fibers provide a large bacterial surface to break down solids.
Stage 10:
An ample air supply and fluctuating liquid levels increase bacterial efficiency.
SKIMMER TABS
CROSS SECTION
SYSTEM SAND
1
2
3
5
4
6
7
8 9
10
2
EFFLUENT
SCUM
SLUDGE
BIO-ACCELERATOR
FABRIC (AES ONLY)
GEO-TEXTILE
FABRIC
COARSE
FIBERS
RIDGES
®
C
I
R
B
A
F
R
O
T
A
R
E
L
E
C
C
A
-
O
I
B
AIR SPACE
®
(AES ONLY)
SEWN SEAM
(ALWAY UP - AES ONLY)