Open AccessPhytoremediation of Maninjau Lake water using Minute Duckweed (Lemna perpusilla Torr.)
Author(s) -
Tjandra Chrismadha,
Tri Suryono,
M. Magfiroh,
Y. Mardiati,
Endang Mulyana
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/308/1/012021
Subject(s) - environmental science , eutrophication , biomass (ecology) , nutrient , lemna minor , aquatic plant , agronomy , biology , ecology , macrophyte
Lake Maninjau is a tecto-volcanic lake in West Sumatra, which is currently facing eutrophication problem and urgently needs measures to be recovered. A preliminary experiment was carried out to assess the possibility of using minute duckweed ( Lemna perpusilla Torr.) for healing the lake water, while also producing biomass for alternative feed. This experiment was carried out in The Unit for Technology Transfer of Lake Restoration – Indonesian Institute of Sciences, which located next to Maninjau Lake. It employed 9 plastic containers of 30X20X20 cm 3 filled with lake water taken from 3 locations of different level nutrient contamination. As much as 10 g minute duckweed was put into each container and let to grow for 9 days. Observation on the plant growth and biomass productivity along with the water nutrient concentration was carried out every 3 days. At the end of experiment duckweed biomass was sampled for proximate analysis. The results shows that Maninjau Lake water supported only sub-optimal growth of the duckweed, indicated by low growth rate (ranged 8-22 %/day) as well as the biomass protein content (13-15 % DW). The duckweed, however, can eliminate up to 94% phosphate and 54% total in-organic nitrogen from the water, which also indicating that phosphorous was the limiting factor for duckweed growth in the lake.