Duckweed Closeups in Sunol regional park, near the Little Yosemite area Jef Poskanzer, amateur photographer, shares a vision of duckweed in Yosemite. Judging by the color, we prescribe a new lens for Jef, or some nitrogen for the duckweed. Failing that . . . Eugenia Olgu n, Elizabeth Hern ndez, Patricia Couti o and Rosal a Gonz lez provide a brief spanish language review of wastewater treatment using aquatic plants. Pennywort and Duckweed Marsh System for Upgrading Wastewater Effluent from a Mechanical Package Plant R. Wolverton and R. McCaleb recommend use of duckweed or pennywort to bridge the winter gap for wastewater treatment.
Efficiency is compared to water hyacinth systems.
The Use of Duckweed for Wastewater Treatment J. Zirschky and S.C. Reed, discuss the pros and cons of duckweed-based wastewater treatment. Hyacinth does a bit better. We recommend Professor Chen review his duckweed aquaculture paradigm. Maintained with no open spaces and harvested regularly, duckweed should outperform hyacinth. Joe Castiglione reports on Lemna Corporation's duckweed-based wastewater treatment system at Devil's Lake, North Dakota.