flowing-water

Waste Water Treatment Plant Reuse – WA, Australia

Clean TeQ received a Western Australian Premier’s Water Foundation grant which aimed to kick-start research and innovation in water conservation. As a result of this funding, Clean TeQ Water worked with WorleyParsons to install and test a 42m3/h pilot plant at the Woodman Point Wastewater Treatment Plant (WWTP). The pilot plant aimed to validate the effectiveness, efficiency, and cost of Clean TeQ Water’s CIF® (continuous ionic filtration) technology. View the full report.

woodman 2
Photo of the completed pilot plant

Testing mostly focused on the treatment of secondary treated wastewater, which is produced by treating wastewater using primary filtration and biologically based processes. This water still contains a variety of constituents including suspended solids, nutrients, organics, bacteria and viruses. While secondary wastewater can be suitable for some applications, including agricultural and irrigation, it is not suitable as industrial water without further extensive tertiary treatment. Micro-Filtration (MF) followed by reverse osmosis (RO) is the typical technology of choice for this tertiary treatment, which usually has the significant issues of scaling, bio-fouling and particulate fouling.

Testing Results – Comparison of CIF® to MF/RO When Scaled to 670(m3/h)

CIF®MF/RO
Produced Water Flow (m3/h)670670
Recovery (%)9575
Waste (m3/h)24167
Power (kWh/m3)0.221.166
Capital Expenditure (CAPEX)($)$13,000,0001$25,000,0002
Operational Expenditure (OPEX)($/m3)0.5130.503
1. Excludes infrastructure costs. 2. Includes infrastructure costs. 3. Direct costs only, excludes amortisation of capital

Testing Results – Water Treated with CIF®

Units ppm unless specifiedFeed WaterProduct Water
Total Dissolved Solids (TDS)670<20
Total Suspended Solids (TSS)55<5
Turbidity62.2
True Colour (TCU)499
Hardness1602
Na1592.3
K251.2
Ca28<0.1
Mg9.1<0.1
Hardness as CaCO31090.1
Total Phosphorus7.70.4
NH4 as Nitrogen7.30.3
NO3 as Nitrogen4.6<0.05
NO2 as Nitrogen0.70.01
Fe0.10.04
Cl185<0.5
SO4660.7
Total alkalinity as CaCO31407
Chemical Oxygen Demand (COD)58<10-25

Summary

Testing successfully validated the CIF® technology has the ability to consistently satisfactorily treat secondary treatment wastewater and produce industrial quality water. Furthermore, it has demonstrated its capability of doing so with similar operating cost, lower power requirements and higher recoveries than MF/RO technology.

Also noted is the flexibility and robustness of the CIF® ion exchange process which indicates that this technology will lend itself to a broad range of water management strategies and recycling applications. Of particular interest is the potential for CIF® to provide cost-effective solutions for wastewater treatment from large-scale metropolitan to small regional systems, reuse of WWTP effluent for industrial applications, treatment of aquifer water in remote communities, reduction of such as nitrogen-containing ions (nitrates, nitrites, and ammonia), phosphates and sulphates, and capture and use of stormwater. For more information, read the full report.