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MARPAK is a modular PVC corrugated media
specifically designed for biological treatment
applications. MARPAK media is manufactured
from rigid PVC sheets that are UV protected
and resistant to rot, fungi, bacteria, acids
and alkalies commonly found in wastewater.
MARPAK modules are manufactured in various
sheet thicknesses to meet specific structural
requirements. MARPAK includes a full range of
modular PVC media geometries for wastewater
treatment including - complete secondary
treatment (Figs. 8-1 and 8-2), nitrification (Fig.
9-1), denitrification, industrial roughing filters and
anaerobic treatment.
4-3
Retention Time Versus Flow
At A Media Depth Of 10ft.
Source: “Evaluation of Plastic Media In Trickling Filters”,
by T. Richards and D. Reinhart
1.2 2.4 3.6
0 0.5 1.0 1.5
20
16
12
8
4
2
0
Flow m
3
/m
2
/h
60° Cross Flow
Modular Media
Random Media
Flow GPM/ft
2
Retention Time In Minutes
4-2
Retention Time Versus Flow
At A Media Depth Of 10ft.
Source: “Plastic-Packed Trickling Filters” by E. Sarner
2.0 3.0 4.0 5.0 6.0
0.8 1.2 1.6 2.0 2.4
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Retention Time In Minutes
Flow GPM/ft
2
Flow m
3
/m
2
/h
Vertical Flow
Modular Media
0.4
60° Cross Flow
Modular Media
4-1
Flow Configuration
of MARPAK MXF Series Media
Modular Biological Treatment Media
Faster Installation
Extensive testing has proven that taller mod-
ules produce the same water distribution as
alternating 1'-0 modules. This means 4 ft, 6 ft,
or even 8 ft modules can be used to reduce
installation time and minimize the number of
clog-prone module interfaces.