Nanobubbles in Pond & Lake Management

Oxygen nanobubbles can raise dissolved oxygen in ponds, and Honour Tech has confirmed increases in dissolved oxygen at actual pond sites.

In 2022, dissolved oxygen was observed before and after oxygen nanobubble supply at the Khera, Kanheri and Dangra ponds in Haryana, India. Dissolved oxygen rose at all three sites; representative results are shown under evidence and cases on the pond and lake management page.

The extent of the increase, however, depends on water temperature, depth, pollution load, supply flow and oxygen quantity, and the location and timing of measurement. Honour Tech checks current dissolved oxygen and target levels to review an oxygen supply configuration suited to site conditions.

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Oxygen nanobubbles are used to relieve dissolved oxygen shortage and manage water conditions that favor algal blooms. They should be distinguished from technologies that directly remove blooms that have already formed in large quantities, and we do not promise bloom removal.

Supplying oxygen to a pond or lake can help relieve oxygen shortage and the reducing environment near the bottom. However, algal blooms are affected by nutrients such as nitrogen and phosphorus, water temperature, sunlight and water residence time, so even keeping dissolved oxygen high cannot completely prevent them.

Honour Tech recommends using oxygen nanobubbles as a technology for preventing dissolved oxygen shortage and managing factors that degrade water quality, rather than for removing blooms directly. Only oxygen is supplied; no chemicals are added.

Oxygen nanobubbles can help suppress some odor generation by improving the reducing environment caused by oxygen shortage near the bottom.

When organic matter accumulates on the pond bottom and oxygen runs short, conditions favor the formation of odorous substances such as hydrogen sulfide. Oxygen supply can be used to improve these water conditions.

Oxygen nanobubbles do not, however, physically remove sediment that has already accumulated. Where sediment is heavy or pollution is severe, separate sediment management such as dredging may be needed. Honour Tech checks dissolved oxygen by depth, water quality and sediment condition to review oxygen supply points and circulation methods.

Required system capacity is judged by total water volume, oxygen consumption, depth and circulation characteristics rather than by lake area, and large water bodies are served by several units configured in parallel.

Even with the same area, different depths and volumes require different oxygen supply. Oxygen shortage can occur at the bottom even when surface dissolved oxygen is sufficient, so whether oxygen reaches where it is needed must be considered along with the quantity of oxygen.

Honour Tech reviews system capacity and installation method based on water volume, depth, water temperature, dissolved oxygen by depth and target water quality. For large water bodies, multiple supply points or combinations with flow-generating devices are also considered. Lakes and reservoirs are currently at the "validation" stage.

HEN is considered first where equipment sits on the bank and connects by piping; HOA is considered where a submerged system is installed solely to raise dissolved oxygen.

HEN circulates stored water from the water body with a standard transfer pump and supplies oxygen nanobubble water. HOA is an oxygen dissolver that operates underwater with a submersible pump; the choice depends on installation conditions and operating purpose.

Honour Tech checks surface area, depth, oxygen supply target, installation space for equipment, and power and piping conditions to review the product and installation configuration. For large water bodies, the area over which oxygen is delivered across the whole water body is considered along with the treatment flow of a single unit.

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