Tech Bundle

Water Tech

Water is a critical resource that sustains all lifeforms on Earth that drives agricultural and industrial activities. Despite its abundance, half a billion people in the world face severe water scarcity all year round. Many of these water resources have been over- exploited and polluted to the extent that utilization is not possible without adequate treatment. The Water Tech Bundle features a well curated list of technologies to enable enterprises to access, license or co-innovate with technology providers to serve the water needs of the industry. This includes a range of solutions to produce potable drinking water and to treat wastewater, digital solutions to automate and optimize processes and  technologies to improve energy efficiency and infrastructures.

Supercritical Water Oxidation System for Treating Challenging Wastewater
Industrial wastewaters are usually treated by a combination of chemical and biological treatment methods. In some cases, COD and BOD levels are too high to be treated by these conventional methods and are sent directly for incineration which is often energy-intensive and costly. Supercritical water oxidation (SCWO) is a technology that is capable of oxidizing the toughest organic compounds in wastewater. Wastewater is mixed with oxygen and raised beyond the critical point of water (221 bar and 374oC). At supercritical conditions, oxygen rapidly and completely oxidizes all organic pollutants in the supercritical wastewater in a span of seconds to form water nitrogen and carbon dioxide. SCWO can be used to treat highly hazardous waste that cannot be handled by conventional technologies including brine, industrial wastewater, hazardous organic material or sludge from water treatment plants containing non-biodegradable pollutants.      
Novel Smart Rainfall Prediction System
Due to climate change, extreme weather events such as heavy rainfall are becoming a common occurrence. In a tropical setting, rain can be highly localized and changes quickly. Rainfall tends to appear and disappear quickly within an hour causing flash floods in urban areas. This technology relates to a novel smart rainfall prediction system utilizing data from multiple X- band rainfall monitoring radars. The X- band radar scans the sky for rain, feeding data into the system every 2 minutes to create an accurate map of the real-time rainfall intensity though the use of a nowcast model. This allows the relevant municipal authorities to improve on existing flood management measures and react quickly in case of flash floods. The technology owner is currently looking to license the technology to logistic companies and city governments.    
Controlling Excessive Microalgae Growth using Ultra Low Frequency (ULF) Treatment System
Freshwater algae blooms are the result of excessive nitrogen and phosphorous originating from runoff from fertilizers and household cleaning products. Excessive algal bloom may adversely affect the ecosystem as it causes the depletion of oxygen levels in water and prevents sunlight from reaching other organisms in the water. When microalgae die, the decomposition process also consumes dissolved oxygen and releases nutrients back to the water. This decreases the dissolved oxygen levels in the water and resulting in constant regeneration of microalgae under favorable conditions. This technology relates to an Ultra-Low Frequency (ULF) Algae Control Unit (ACU) treatment system that can be used to control excessive microalgae growth in water bodies. The ULF technology uses an electromagnetic field of ultra-low time-varying frequency range of 100 Hz to 2000 kHz. The ACU comprises emitters and receivers which are energized by a power unit during operations. The ACU creates a disinfecting effect on microorganisms similar to an avalanche current produced in fluorescent tubes.
Remote Sensing System for Water Quality Monitoring
Water quality parameters in water bodies are usually obtained using in-situ sensor probes or by laboratory measurements of water samples collected on-site. These conventional methods are laborious, costly and have limited spatial coverage. This technology relates to a contactless measurement method for water quality parameters and can be deployed on buildings’ roof-top overseeing reservoirs or unmanned multi-rotor drones. This technology was developed to measure freshwater (reservoirs) parameters like Chlorophyll-a, water turbidity and CDOM (colored dissolved organic matter) but can be extended to detect surface scum, oil, and other contaminants. The principle and methods employed are similar to satellite imaging and the water body naturally illuminated by sunlight and can be measured based on water reflectance. 
Chemosensing Method for Detection of Musty & Earthy Odor in Water
In developed countries, consumers' assessment of drinking water quality goes beyond the regulatory requirements of chemical and biological contaminants that are detrimental to health. Quality is intricately linked to the taste and odor of the drinking water. As such, this has increasingly become a concern for drinking water suppliers. Geosmin (GSM) and 2-methylisoborneol (2-MIB) are two compounds that are responsible for the musty and earthy odor in drinking water. This technology relates to a method for the detection of GSM and 2-MIB using a fluorescent displacement assay based on specially designed molecular imprinted polymers. This method is faster, cheaper, and visually detectable as well as can be used in the field as compared to conventional gas chromatography-mass spectrophotometry (GC-MS) techniques. Prior to GC-MS analysis, tedious pre-treatments are required. Furthermore, the chemosensing method can be potentially applied to water quality and monitoring of other small molecule contaminants as well. 
Novel Bioretention System for Sustainable Urban Stormwater Management
In an urban setting, rainwater flows over rooftops and concrete surfaces picking contaminants including bacteria, oil & grease, metals and pesticides before entering the sewer systems. These pollutants will eventually end up in the surrounding waterways contributing water pollution and increasing the treatment load to municipal wastewater treatment plants. Green infrastructure such as green rooftops, roadside plants and landscaped parks can potentially reduce the amount of polluted stormwater runoff, hence, reducing the reliance on wastewater treatment plants. Bioretention systems comprising of a novel engineered filter media and various types of plants were developed to mitigate the negative effects of urban stormwater runoff. This novel modular bioretention system process consists of detention, conveyance, sedimentation, filtration and biological denitrification. Compared to conventional media, the modular system is more cost-effective and customizable in managing the non-point source pollution.
SWAN - Real-time Water Quality Monitoring and Sensing
The technology described herein is a smart robotic autonomous platform and water sampler, with the ability to operate with minimal manual support. The platform constantly monitors the water quality of the entire water body as it propels around, increasing the efficiency of water sampling while reducing the costs involved. It utilises a cloud-based network to feed the data collected in real-time to the User for analysis, as well as incorporating various intelligent mission planning algorithms which then decides the next best route it should take to collect the necessary data. The platform aims to ensure that this important resource - water - remains optimal and safe to use, drink and enjoy, while reducing the carbon footprint to the environment.