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Company OWAC
Country Italy
Booth C06
Introduce OWAC is an engineering company composed of a team of skilled professionals with a long-time expertise in the waste-to-energy sector. Having achieved a solid international experience through projects on industrial plants and their construction around the globe, OWAC can be the ideal advisor for those entrepreneurs who intend to diversify or strengthen their business in the field of environmental protection.
OWAC can handle complex problems and guarantee that the technologies most appropriate to each specific project are applied. The company can also develop new solutions thanks to its partnerships with many university departments, including the Department of Mechanical and Aerospace Engineering of Sapienza University in Rome. As a matter of fact, OWAC represents this University Department in the Asian countries for all the aspects regarding the production and re-use of secondary solid fuels (waste-to-energy).
OWAC’s main customers are: industrial businessmen involved in the fields of the collection, recycling, treatment, and disposal of solid and liquid waste; municipal enterprises that want to improve their waste management strategies; businessmen who intend to start producing green energy from renewable sources.


Projects for waste-to-energy plants and environmental remediation of contaminated soil
OWAC designed an integrated plant for the treatment of contaminated soils. The thermal desorption process allows the treatment of contaminated soil in order to separate both volatile and semi-volatile organic contaminants. The process operative temperature stands between 90 and 650 °C; the air of combustion or other inert gas are used as fluid of transportation to remove the contaminants. Compared to other incineration treatments, thermal desorption has the following advantages: emissions are usually free of polychlorinated, PCDD, dibenzofurans, and PCDF (dioxins); remediated soil still maintains the mechanical characteristics so it can be used for industrial purposes; treatment costs are certainly lower. The project designed has certain advantages because the used technologies allow to recover, through thermal desorption, the contaminated soil that can be used again or to transform, through the use of both processes, the hazardous waste into less dangerous materials, reducing the disposal costs due to the chance to use final plants located in the surroundings.
Project of a plant for biomethane and electricity production
OWAC designed a plant that produces biomethane using the anaerobic digestion of organic waste from cities; this process is aimed at treating, in the absence of oxygen, the organic substance which is transformed into biogas, a mixture consisting of methane and carbon dioxide, in variable percentages depending on the conditions of process. Different technologies can be used, depending on the dry matter content of the reactor-fed substrate. The technology in the plant is made by Martin; in the plant two dry anaerobic digesters with Thöni system are provided. This type of digester is particularly suitable for organic waste with a high concentration of impurities. Electricity is produced as well, to supply the energy consuption of the plant.
Wastewater and sewage treatment systems
Innovative technology for wastewater and sewage treatment uses organic or inorganic membranes obtaining several advantages, such as: minimized membrane surface fouling, increased process efficiency, significant cost reduction, low energy consumption, effortless cleaning procedure with long intervals between cleanings, substantial extended membrane lifetime.
Depending on the membrane type, the ultrafiltration removes particulates and free or emulsified oil components larger than 0.01 μm. Ensuring a constant operation at high performance levels between the Clean-In-Place and to lower the surface load, low fouling membranes with high hydrophilic membrane surface are integrated into the systems.
Reverse Osmosis, commonly referred to as RO, is a process where water is demineralized by pushing it under pressure through a semi-permeable Reverse Osmosis Membrane. These systems are used for landfill leachate treatment, oil-water separation, scrub water treatment from large ships, etc.
Multi-purpose plant for mixed urban waste treatment and material recycling
OWAC has built a multi-purpose system for mixed urban waste treatment and material recycling. The plant is composed of two sections: one for mechanical treatment and one for biological stabilization of the organic waste (composting). The facility has the purpose of maximizing the recovery of materials from the mixed urban waste; it takes place through some mechanical sorting operations and some supplementary treatment to prepare the material for packaging the output products. The biological section is an aerobic biostabilization plant to stabilize the organic fraction; the process allows to obtain the reduction of both weight and volume and the disinfection of urban waste, according to the application and optimization of the biological reactions that normally occur in nature. The entire platform is designed to treat up to 1,000,000 t/year of mixed urban waste.
Monitoring system with Drone
OWAC uses a Remote Pilot Aircraft Systems (SAPR) for the generation of three-dimensional and digital models and high resolution orthophotos, of the areas to be designed and monitored. The aerofotogrammetria with drones allows the survey of the land characteristics not easily perceivable at ground level, and it allows, even through the use of infrared cameras, plant sections otherwise difficult to reach in the industrial plants. Through the design and implementation of custom hardware, it is possible to remotely control any signal, both analogue and digital, coming from the sensors present in the system. The data obtained are sent and stored in remote databases and made accessible with different levels through a highly customizable remote monitoring portal which meets the customer's specific needs. Thanks to remote monitoring, there are multiple benefits: monitoring the current level of productivity compared to forecasts, analyzing performance, collecting production data, operating in relation to production capacities; planning and implementing ordinary and extraordinary maintenance with the least possible impact on the continuity and high reliability of the service; detect faults quickly and intervene to ensure continuity of service.

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