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REUSE OF INDUSTRIAL
TREATED SEWAGE EFFLUENT
FOR CHILLER & RO

REFERENCE FACT SHEET

PROJECT DESCRIPTION

  • Filtered water capacity 2,400 m³/d: 300 m³/d (station 1); additional 2,100 m³/d (station 2)
  • Greenfield EPC
  • Pre-treatment process steps and ceramic filtration
  • Location: Thailand
  • In operation since 12/2019

PROCESS CHAIN

  • Treated sewage effluent (TSE) from pond pumped to treatment plant
  • Retention tank with chlorine dosage for chemical oxidation
  • Injection of Alum for coagulation
  • Dead-end submerged ceramic flat sheet membrane filtration
  • Reverse osmosis (for station 2)

PROCESS FLOW DIAGRAM (STATION 1)

PERFORMANCE DATA (STATION 1)

The TSE comes from a soybean food processing plant. High amounts of remaining undegraded proteins and oil are daily challenges that can lead to rapid membrane fouling. Further, the storage of the TSE in the ponds increases the formation of algae. Both challenges are solved using CERAFILTEC’s process-integrated membrane cleaning function (CapClean). The membranes are fully recovered with each automated cleaning cycle using chlorine with a soaking time of 3 minutes. 

Consistently high flux is achieved by operating the system as active cake layer filtration (ACLF) in conjunction with frequent CapClean execution.

PARAMETER
UNIT
FEED WATER
FILTERED WATER
Color
Pt-Co
117
39
COD
ppm
68
30
BOD
ppm
9
4
TDS
ppm
946
967
TSS
ppm
18
< 1 (nil)
Turbidity
NTU
11.2
< 0.5
Oil
ppm
7.2
< 0.2
PARAMETER
UNIT
VALUE
No. of trains
1
Max. flow per train
m³/hr
15.5
Max. flux rate
LMH
215
Filtration time
hrs
12 x 1.93
Backwash time
sec
12 x 30
Recovery rate
%
92.2
Power consumption
kWhr/m³
0.04

PLANT PICTURES (STATION 1)

TSE pond and
intake pump

Skid-mounted
filtration
plant from
local systems
integrator

Skid-mounted
filtration
plant from
local systems
integrator

Completed
plant by
systems
integrator

Completed
plant by
systems
integrator

Completed
plant by
systems
integrator

Feed water after
coagulation inside
filtration train

Start of backwash
Cake layer 
removal

Air-scouring
during
backwash
mode

CapClean
during
backwash
mode

Plant
performance
testing

Filtered water
(left)
feed water
(right)

Filtered water
(left)
feed water
(right)

Filtered water
for chillers

Contaminated
chiller prior to
CERAFILTEC
installation

Contaminated
chiller prior to
CERAFILTEC
installation

Clean chiller
with
CERAFILTEC
operation

Clean chiller
with
CERAFILTEC
operation

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