Richard Boylan <rjb-oai@CAPE.COM> wrote:
>In response to Jacky's question of a while back...
>>how do the floating, lagoon-based systems look like and consist ?
>
>We are adapting our Lake Restorer units to treat higher-strength organic
>wastes that are presently disposed of in lagoons...........(cut)
>Our new designs are basically modular and scalable series of fluidized
>bed biofilters and intensified wetland systems.

I am beginning to understand that your Lake Restorer units are not floating on the lagoon
......Am I correct, Richard?

Are the LR units installed on land and ideally beside the lake where you then draw water from the lake to these LR units for treatment ? SO they are not on "barges" nor floating on a lake as Dave  Cannon has also understood.

In Japan, I am aware of four techniques that are being researched and used for lake water restoration.

One method tackles the problem before the water source enters the lake. Sections of a constructed canal will have many vertically fixed supports (rope-like) to provide a surface for the adherance of microorganisms -- like a fixed film oxidation system.

Another method is to pump (using solar or wind energy) water into a flow-through canal beside the lake with a variety of water plants (wetland type and floating plants) and mussels in the canal - a constructed wetland system. They encourage the public to participate since many of the plants used can be used in the kitchen. So such a system has now become a family water garden for the community - of course the quality of the lake in-flowing water is monitored. It is also popular for school children to visit.

The third method is to float enclosures of floating aquatic plants on to the lake itself. The biomass is removed periodically.

The fourth method is still new and a prototype was constructed recently for research. This is actually a floating aerator which operates using photovoltics. It pumps water up and lets it trickle down the platform surface where  algae and bacterial film eventually establishes. The company will improve it by incorporating living plants.

In systems that uses plants, it is essential to remove a certain portion of the plant biomass periodically. This actually offers great opportunities for the development of integrated bio-systems to use the plant biomasses, composting, vermiculture, water gardens, etc.

Richard:
are plant biomasses periodically removed in LM systems ? I dont think I read it in any of the homepages, etc.

regards
jacky