Biological Landfill Leachate, Wastewater and Effluent Treatment

Storm water aeration with Bubble Tubing® diffuser

Clients seek ways to treat leachate, wastewater and other effluents stored in catchment basins efficiently and effectively. Here are some examples:

A manufacturer dealing with wood residues such as wood chips, sawdust, fiber and other wood products wanted global improvements to the onsite waste water treatment system.

Mine effluents aeration with OctoAir diffusers Two catchment basins collect surface water from the processing areas. This water must be treated before being released into the environment to comply with environmental standards. Even though the customer was already aerating these ponds with surface injectors, they were looking for new technologies to increase energy efficiency, reduce maintenance of diffusers and compressors and ultimately have superior treatment results.

In the first pond, a 15HP (11.2kW) surface hydro-mixer was replaced with a 10HP (7.5kW) rotary claw compressor and linear Bubble Tubing® diffusers installed at the bottom of the basin. This change reduced electrical consumption and eliminated the need for machinery and electricity in the water. The result was a high level of oxygen in the water that immediately met environmental standards and provided significant energy savings.

The second basin previously used an expensive floating solar aeration system which proved to be the highly inefficient most of the time. It was replaced by a homogeneous distribution of Bubble Tubing® and a rotary claw compressor. The customer has now incorporated our solutions in these two basins and is pleased with the low energy costs associated with this innovative solution and the high performance results. These results had never been achieved with previous systems. In addition to aeration, they also use natural Bacterius™ C beneficial bacteria for digestion of organic matter and Bacterius™ N for nitrification during peak summer periods. Being geographically located near our office, the client also benefits from our maintenance and repair service.

A company specializing in the recovery and composting of solid waste from the pulp and paper industry needed to control and manage the runoff and infiltration of leachate.

Landfill Leachate Treatment with Bubble Tubing®

Their site consists of a series of catchment basins that lead into an anaerobic treatment basin followed by artificial filter marshes. Their original air diffusers were out date, costly to maintain and not achieving the expected results. In order to improve their overall operations, they wanted to reduce their energy consumption costs, increase the transfer of oxygen to improve the quality of the water and thus allow a better efficiency of treatments in the basins. Noisy compressors from the original installations were bothering the neighbors.

They replaced their homemade large bubble diffusers that were ineffective with our linear Bubble Tubing that had been independently tested for oxygen transfer and energy efficiency rates. When oxygen transferred to the water from Bubble Tubing placed on the basin floor, the oxygen transfer rate is exceptional due to the fine bubble size and large surface area covered by the linear tubing.

The company also upgraded the one large compressor as it consumed a lot of energy and was very noisy. Instead each air-line was served by a single piston compressor. The new systems have greatly reduced energy consumption and noise, but they have also increased the reliability of the entire aeration system. When a compressor is down for maintenance, the others can continue working, keeping the proper oxygen balance required for safe water treatment. For treating contaminated water dissolved oxygen levels of 2mg / l or more is required to keep a bacteria flora functioning properly.

The client has noted the diffusers rarely require maintenance, but when they do, it is fairly easy since does not require removal of the diffusers from the water as they can be purged from shore. They have now benefited from many years of effective aeration with our Bubble Tubing®. Owners are pleased with the results and have reduced their energy consumption while increasing the speed with which they treat winter runoff.

This international customer is located in Oman in the Middle East. The mandate? Aeration of a municipal leachate basin with Bubble Tubing ® to control odours.

CanadianAir Diffusion Aeration SystemThe client was interested in Bubble Tubing® due to its flexible nature that would adapt readily to the irregulary shaped leachate basin. Existing systems consisting of energy inefficient surface aerators, that highly agitated the water, creating thick foam on the surface that impeded the transfer of oxygen into the water and caused excess water evaporation. The surface aerators did not address odours at the periphery of the basins.

The customer’s engineers were looking for an alternative solution that would develop less turbulence in the water but still provide high oxygen inputs to maintain the leachate tank under aerobic conditions.

Several parallel lines of Bubble Tubing® were installed in the basin to add more oxygen. The foam produced by the previous system was substantially reduced and the odour problem was eliminated. For optimal results, we recommended the type, model and supplier of compressor required, closest to Oman to ensure that the Bubble Tubing was powered by the correct air to pressure ratio according to our established standards. The project was completed in 2013.

For this client, it was necessary to find an effective aeration system to manage water quality at the municipal wastewater treatment plant.

Treatment with aeration of pulp and paper run-off residues A CanadianAir Diffusion ™ aeration system using the Bubble Tubing® was offered as a solution to this city in the Eastern Townships of Quebec. The aeration system was compared to others by an independent engineering firm mandated by the municipality to determine the best option between the CanadianAir Diffusion™, Atara and Biolac systems. Our system came out ahead of the other two proposed systems. The actual results obtained by the CanadianAir Diffusion aeration system have been impressive compared to the results from previous systems.

This municipal client was looking for new technologies to aerate leachate from a dumpsite.

They wanted to switch from surface air injectors that were easily damaged by winter ice, inaccessible for repair, insufficient in providing the oxygen requirements, and costly to run. With the older system that used surface air injectors they were not respecting their environmental discharge license. As the site was in need to expansion the client came to us to find a solution.
With a new manager it was determined that there should be a better way to aerate the leachate. They contacted us to test our Bubble Tubing® diffusion system. Eventually they replaced all their surface aerators and are now exclusively using our CanadianAir Diffusion Systems with Bubble Tubing®. Their power requirements have been dramatically reduced and their discharge standards are now being respected, enabling them to increase their operations and their revenues.Leachate treatment

A Canadian company provides construction and waste management services including composting services.

Water from composting can create bad odours and problems of water quality. They turned to us to for effective and ecological solutions for managing the site.