Tech Bundle

Industrial Wastewater Treatment

Superlyophobic Materials for Immiscible Liquids Separation
Separation of oil/water mixture using wetting materials has been extensively investigated. However, the wastes released in industrial processes such as multi-phase liquids extraction, food industries or chemical reaction contain more complicated liquids components. The technology presents a novel strategy to prepare a broad range of superlyophobic materials based on polydopamine (PDA) mediated coating. The results demonstrate that the deposition of PDA nanoparticles enhances the growth of silicone microsheets (SMS), which increases trapped air fraction and results in superlyophobicity towards high surface tension liquids and superlyophilicity to liquids with surface tension smaller than 30 mN/m. Superlyophobic sorbents generated from melamine foam and polyurethane foam can absorb various oils with capacity from 53 g/g to 120 g/g (melamine foam) and from 26.5 g/g to 52.5 g/g (polyurethane foam), depending on the oil type and density. High absorption capacity of porous foams towards oils makes them possible to remove low surface tension liquids from a batch of high surface tension immiscible organic liquids such as formamide or diethylene glycol. On the other hand, superlyophobic membranes fabricated from stainless steel mesh, cotton fabric and filter papers can filter chloroform and carbon tetrachloride from water and formamide with efficiency higher than 96%. All as-prepared superlyphobic materials show excellent regeneration. The preparation of superlyophobic materials introduced in this work opens a general strategy for separation of immicible liquids by both static and continuous methods. The technology provider is seeking partner for research collaboration, scale-up testing/test-bedding, product co-development, technology licencing or manufacturing.    
Conductive Material to Enhance Organic Waste Biodegradation
Anaerobic digestion (AD) is a biological method widely used to treat wastes and wastewater containing high levels of organic matter in the absence of oxygen to convert chemical energy in organic carbon to biogas. With AD, the waste volume can be reduced drastically with green energy generation simultaneously. In practical applications, complex structure or toxicity of substrates often impair AD performance associated with low degradation rate and unstable biogas production. Electron transfer among different guilds of microorganisms is the rate-limiting step of AD process, and it is also the basic reason behind the deteriorated AD performance. This technology relates to the dosing of conductive materials which can facilitate interspecies electron transfer and improve the overall metabolic activity in anaerobic digestion. In addition, it is a green and cost-effective technology as those selected materials (e.g. biochar, activated carbon, and iron scrap) can be readily obtained from nature or produced from wastes and recovered for repeated use. The technology provider is looking for waste and wastewater biological treatment providers to license and commercialize this technology.
Hybrid Adsorbent & Electrochemical AOP for Challenging Wastewater
Industrial processes can produce effluents that are challenging in terms of strength, variability and composition. Treatment of industrial effluent is complex and depends very much on the load and process nature of the wastewater stream. Advanced oxidation processes (AOP) are commonly used to deal with recalcitrant COD as a final polishing step in water treatment. However, conventional AOP consumes a significant amount of energy. This technology relates to an advanced water treatment method that is capable of breaking down persistent organic compounds, micropollutants, COD and colour through a combination of adsorption and electrochemical oxidation. The contaminants are bound to the adsorbents while an electric current is passed through the adsorbents, oxidizing the adsorbed pollutants to water, hydrogen and carbon dioxide which can be safely vented away.  The hybrid process utilizes lesser energy compared to conventional AOP processes.  The technology provider is keen to work with potential technology adopters through technical collaboration and licensing agreement to deploy the technology.
Catalytic Wet Air Oxidation for Textile Effluents
Environmental pollution is one of the major challenges that the world face today. Our water resources are threatened by contamination from industrial wastewater namely volatile organic pollutants generated from the petrochemical, textile, pharmaceutical, chemical, and automotive industries. A class of compounds that is of great concern are the organic dyes, which represent a large family of refractory organic pollutants. It is estimated that over 10,000 different dyes and pigments are used industrially and over 700,000 tons of synthetic dyes were produced in 2003 worldwide. With about 1-20% of the total world production of dyes being discharged to the aquatic environment during their application, this can potentially result in severe damages to the photosynthetic activities of aquatic plants and the health of humans. Conventional methods for wastewater treatment include biological process, thermal decomposition, adsorption, membrane separation, and advanced oxidation process. Each of these methods has its strengths and limitations. The catalytic wet air oxidation (CWAO) process has gained much attention recently as its uses air as the oxidant at a relatively low cost. This technology relates to a bimetallic hybrid catalytic system for oxidative degradation of organic pollutants. Compared to conventional wet air oxidation processes, CWAO utilizes less energy as it can operate under ambient conditions using a novel catalyst.
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.