Desalination & Reuse Handbook - Flipbook - Page 69
FEATURED REUSE PLANTS
TERMINAL ISLAND AWPF, USA.
Plant location
Los Angeles, California
Total capacity
45,425 m3/d
The ultimate expansion of the Terminal Island Advanced Water
Purification Facility (AWPF) doubled the treatment capacity of
the plant, which injects treated wastewater into the Dominguez
Gap Barrier for agricultural and industrial reuse, and to prevent
saltwater intrusion into the aquifer. The capacity of the AWPF
facility after the expansion is 45,425 m3/d.
Date awarded
5th December 2015
Date commissioned
18th September 2017
Product recovery
66%
Feedwater TDS
2,800–2,900 ppm
Feedwater temperature
20–32°C
Alongside the additional treatment capacity, the expansion added
a Xylem ultraviolet advanced oxidation (UV-AOP) system credited
for 6-log virus and protozoa removal. The UV-AOP system
also achieves NDMA removal and destruction of trace organic
compounds. The enhanced disinfection capacity of the system
creates greater options for other possible end-users, which could
also provide a potential revenue stream for the facility.
RO Process description
2 Stage
RO Operating pressure
130 PSI
Concentrate disposal
Ocean outfall
Number of trains
4
Energy recovery device
No
Design-build team
Walsh Group/Carollo Engineers
A Walsh Group/Carollo Engineers team was formally awarded
the design-build contract for the AWPF in May 2015, with
commissioning in September 2017. The project location on
dredged fill required soil stabilisation to be carried out before
construction and a compact design footprint of 12,000 m2.
Continuous plant operation was maintained throughout the
construction sequence, and the project included a 90-day
shutdown in which the existing AWPF was transitioned onto the
new plant Distributed Control System (DCS) provided as part of
the expansion.
Desalination system
provider
Doosan Hydro (now SafBon
Water Technology)
Pretreatment system
6 x CP 240 PVDF ‘N’ series module
Pretreatment supplier(s)
Evoqua
Membrane suppliers
Hydranautics
Disinfection system
UV / AOP (NaOCl, dosage 929 mJ/cm2)
Disinfection supplier(s)
Xylem
Post-treatment
Chlorine contact basin with calcium chloride
The plant runs tertiary treated effluent water from the Terminal
Island Water Reclamation plant through MF, RO and UV-AOP
disinfection stages. The expansion’s MF system uses 6 Memcor®
CP 240 PVDF ‘N’ series modules manufactured by Evoqua,
followed by a Doosan Hydro (now SafBon Water Technology) twostage, four-train RO system with a 130 PSI operating pressure
and 66% recovery rate. Biofouling is inhibited by maintaining
a 1–3 mg/l chloramine residual in the MF and RO feedwater,
and membranes were selected for their tolerance to this level of
chloramine concentration.
RO Equipment suppliers Doosan
Procurement model
Design-build
Offtaker
Los Angeles Department of Power and Water
Application of treated
wastewater
Groundwater replenishment
Project cost
$45 million
Total footprint
12,000 m2
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