Ozone use to control odor and pollutants in large water treatment plants is well documented and growing. In addition to disinfection benefits, the ozone breaks down pollutants so that they are better removed with bacteria and filtration. The research and testing for these large plants provides a rich resource for developing a variety of small scale water treatment systems for applications like aquariums, car-washes, building water reclamation, and water condensate treatment.
The IOA convention this year provided an opportunity to visit the Atlanta Aquarium. This aquarium is the largest in the western hemisphere and is home to four whale sharks and over 100,000 other aquatic residents. The filtration system recycles the 10 million gallon capacity in approximately 1.5 hours. The filtration system incorporates ozone to maintain water clarity and disease control. The stunning display of aquatic life and continual maintenance of its health speaks well for the power of ozone.
Many of the presentations at the 2019 IOA convention presented research and studies relating to water treatment plants that treat over 500 million gallons of water per day. The aquarium was a great example of this process on a smaller scale. One of the presenters shared a project of implementing ozone to treat water-reuse for a train-car wash facility. Ozone was used to address a concern of biological contaminants picked up by the vehicles and entering the wash water. Ozone eliminated the danger of pathogens making the operators sick.
Ozone works well by itself for destroying pathogens, but needs help with filtration methods to clean up the left-over scraps. Many studies conducted for large waste water facilities demonstrate that ozone is often most effective for odor and pollutant removal when combined with filtering and/or hydrogen peroxide. Ozone alone will break down many pollutants, but some compounds require more energy. Hydrogen peroxide in the presence of ozone generates powerful oxidizing molecules Hydroxyl Radical (OH-) which are even more effective. Ozone often breaks pollutants down to the point where they are more easily digested by bacteria in a biologically active filter (BAF). The ozone causes some molecules such as dissolved iron to coagulate so they are larger and can be filtered out.
Our team at Oxidation Technologies has worked with various food and recycling industries looking for ways to reclaim water for further process use. We are dedicated to understanding your process so that we can provide the equipment and resources you need and stay within your budget. We offer rental systems that can be used for experimentation before committing to a permanent system designed to fit your application.
The Qatar Environment & Energy Research Institute (Qeeri), one of the three research institutes under Hamad Bin Khalifa University, is in the process of conducting a pilot research into the reuse of treated sewage effluent and agricultural waste water, Gulf Times has learnt.
“A modular pilot plant will be used in the experiments to deliver improved, high-quality water that can be used for irrigation, grey water application, district cooling and other purposes” said Qeeri acting executive director Dr Khalid al-Subai.
“The reuse of treated sewage effluent will provide a major water source in Qatar for agriculture and industrial applications and reduce the demand on desalinated water and major capital investments to build more desalination plants.”
According to Dr al-Subai, the Qeeri project “Reuse of Treated Sewage Effluent and Agriculture Waste Water” aims to investigate the efficacy of ozone and ozone-based advanced oxidation process in conjunction with other treatment processes for the reuse of treated sewage effluent, industrial, and agriculture wastewater.
The official explained: “The pilot scale research would investigate the improvement and optimisation of wastewater treatment processes from reuse perspectives and the efficacy of advanced treatment technology such as ozone and ozone based advanced oxidation process to provide the required treatment.”
These applications could provide wastewater treatment plant operating authorities significant information on best practices to reduce and eliminate negative impacts from waste water effluents.
The design will include hybrid technologies to provide an optimised operation that could improve treatment process.
The official pointed out that Qeeri was dealing with two national grand challenges of water security and energy security. “Ensuring water sustainability includes identification and management of water resources; maintaining water production in terms of quantity and quality, researching the most efficient desalination technologies at minimum cost, conserving environmental quality and managing water for society,” he maintained.
Dr al-Subai said Qeeri had a project-oriented structure where basic fundamental and applied sciences are integrated to achieve water sustainability.”The main research areas are desalination technologies, groundwater mapping and recharge, and reuse of treated wastewater.
We are conducting cutting-edge research and development programmes in these three areas.
“The aims of these R&D projects are to: increase energy efficiency, reduce costs, and minimise health risks and environmental impacts.The water security grand challenge programme at Qeeri involves the research and development of innovative techniques from concepts to near market products.”
The official noted that high quality and innovative research programmes were pursued at Qeeri along with other stakeholders including Kahramaa, QWEC, Ashghal, Ministry of Environment and Municipalities, Qatar Cool as well as with industries in the oil and gas sector that use and produce large amount of water.
“A key component for achieving water sustainability is the partnerships with governmental water authorities.
Qeeri has also launched a monthly open programme called “Science Majlis” as part of its activities to raise awareness among school children and the public on the topic,” he added.