WAVING BIOMEDIA (WBBR)
Our innovations reduce costs, improve performance, and above all, protect human health and nature.
A New Hope For An Old Approach
Microbubble Aeration and Waving Biomedia bring new hope to lagoon systems that fail, pollute, or treat wastewater too slowly.
Invented by a recognized industry leader
Dr. Govind leads the technology and engineering behind product development and innovation. He has many years of experience in wastewater treatment, biofiltration, and material science.
More for Less
Our biomedia costs less per cubic foot. And you buy less per basin. So you can treat more water, better, for lower costs.
The Science of Lagoons
Dissolved oxygen is present throughout much of the depth of aerobic lagoons. They tend to be much shallower than other lagoons, so sunlight and oxygen from air and wind can better penetrate the wastewater. In general, they are better suited for warm, sunny climates, where they are less likely to freeze.
Wastewater usually must remain in aerobic lagoons from 3 to 50 days to receive adequate treatment. Wastewater treatment takes place naturally in many aerobic lagoons with the aid of aerobic bacteria and algae. Because they are so shallow, the bottoms need to be paved or lined with materials that prevent weeds from growing in them.
Conditions inside facultative lagoons are always changing—due to variations in weather, composition of wastewater, and other factors. Typically wastewater in facultative lagoons settles into three layers or zones. Treatment takes place in all three.
The aerobic zone is the top layer in a facultative lagoon, where most oxygen is. The wastewater in this part of the lagoon receives oxygen from air, algae, and wind or rain agitation. This zone also serves as a barrier for the odors from gases produced by the treatment processes occurring in the lower layers.
The anaerobic zone is the layer at the bottom of the lagoon has no oxygen. It includes a layer of sludge, which forms from solids that settle out of wastewater. Here, treatment is by anaerobic bacteria, microscopic organisms.
Names for the middle layer include the facultative, intermediate, or aerobic-anaerobic zone. Both aerobic and anaerobic conditions exist in this layer in varying degrees. Depending on the conditions in any given part of this zone, different types of bacteria and other organisms contribute to wastewater treatment.
Mixing of Water in Lagoons
Mixing and aeration of water in the lagoon is important to prevent algae growth. Without mixing, thermo stratification will occur, thereby permitting the retention of undisturbed surface layers for relatively long periods of time. Such conditions provide an excellent environment for algae to become established and grow.
Aeration and Microbubbles
The transfer of oxygen from the air bubble to the water depends on wastewater characteristics: (1) concentration of soluble salts (Total Dissolved Solids or TDS), water temperature, water depth, total suspended solids (TSS), presence of surface active agents, etc.; (2) tank geometry, bubble size, kinetic energy of the fluid, etc.; and (3) extent and type of liquid mixing with the bubbles, which determines the path length of the air bubble.
To enable efficient nitrification and subsequently de-nitrification, which is the conversion of nitrates/nitrites to nitrogen gas, and to decouple the solids age from the Hydraulic Retention Time (HRT), the use of biomedia in the lagoon is very important. Waving Biomedia, which has a greater surface area than other media, enables biofilms to grow on the surface of the biomedia. This attached biomass stays in the lagoon for a very long time, while water continues to flow through the lagoon, at its hydraulic retention time. This allows the solids age to be decoupled from the lagoon’s HRT.In addition, the biofilms on the surface of Waving Biomedia allow both nitrification and de-nitrification of the water, as it flows past and through the biomedia, that is waving around in the water. This allows effective water treatment, without pumping the water out of the lagoon.
Relevance of Nitrification and De-Nitrification in Lagoons
Nitrification is the process of converting the ammonium in the water to nitrates/nitrites. Some nitrification generally occurs in most aerated lagoons. However, such nitrification is usually unpredictable and cannot be depended upon to meet effluent limits, especially during the winter. For aerated lagoons to be a viable processes for nitrification, the lagoon process must be modified so that the solids age is uncoupled from the hydraulic retention time (HTR).