Water & Wastewater Asia May/Jun 2021

IN THE FIELD WATER & WASTEWATER ASIA | MAY/JUNE 2021
HFNF membrane
technology for direct
treatment of peat
water
Layout of HFNF
system with capacity
of 450L/s
RAW WATER PERMEATE REJECT
Pressure
(Bar)
T (ºC) pH Turbidity
(NTU)
Color
(PCU)
TDS
(mg/l)
Pressure
(Bar)
T (ºC) pH Turbidity
(NTU)
Color
(PCU)
TDS
(mg/l)
T (º C) pH Turbidity
(NTU)
2.5 30 3,7 11,46 1100 60 2,3 30 4,6 0 0 34 30 3,8 15,26 2600 80
2.5 34,5 3,6 7,55 1000 55 2.3 35,1 4 0 0 31 34 3,6 7,6 1000 54
2.4 34,8 3,6 7,25 900 57 2.2 34,9 3,9 0 0 31 37,1 3,6 7,9 1000 57
2,44 34,3 3,5 5,93 1890 54 2,3 34,6 4 0 0 28 34,1 3,6 12,4 1890 69
2.5 32,7 3,5 4,24 960 58 2.3 32,8 4 0 0 25 32,8 3,4 6,16 1600 84
2.5 32,5 3,6 4,59 810 58 2.3 32,9 3,9 0 0 25 33,1 3,4 4,88 1530 88
Color
(PCU)
TDS
(mg/l)
plant results, it can be concluded
that HFNF membrane technology
can produce drinking water that
fulfils the required standard, and
PROCESS DESCRIPTION AND
COST ESTIMATION
Peat water treatment with HFNF
membrane technology is performed
less than 800 Dalton. As such, colour
particles sourced from humic acid
and included in the natural organic
matter (NOM) category, alongside
Results of the
pilot plant with
HFNF membrane
technology for direct
peat water treatment
is able to offer drinking water
with an operational pressure that
turbidity particles and suspended
quality that is more consistent
depends on the osmotic pressure
solids, can be removed completely.
than UF membrane technology as
generated from the dissolved solids
Furthermore, it is necessary to add
polishing treatment of the existing
content (TDS) in raw water. The
pH adjustment facilities in production
conventional WTP.
higher the TDS content, the higher the
water as HFNF membranes are
operating pressure of the system. For
unable to increase the degree of
During the pilot plant, HFNF
instance, the raw water source from
acidity of treated water.
membrane technology does not
Sungai Mesjid has a TDS content of
require chemicals for maintenance.
less than 100ppm, so the operational
As for cost, Opex includes costs for
Although UF technology, as
pressure of the HFNF membrane
electricity, manpower, membrane,
polishing treatment of existing
system is in the range of 2.5 bar.
replacement, chemical for membrane
conventional WTP produces results,
maintenance, and spare parts
the conventional WTP still requires
The principle of processing with
and consumables maintenance.
extensive amount of chemicals
HFNF membrane technology using
The Capex, for all three stages of
and produces sludge that consist
the dNF080 membrane filters all the
development, is estimated at around
hazardous and toxic material.
molecules less than 1nm and MWCO
Rp107.4 billion (US$7.4 million).
28