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Title: Potential of aquatic weed Salvinia molesta (Mitchell) for water treatment and energy recovery
Authors: Abbasi, S A
Nipaney, P C
Issue Date: Jul-1994
Publisher: NISCAIR-CSIR, India
Abstract: Salvinia molesta (Mitchell), has been studied as a bioagent for treating wastewaters containing 1-100 ppm of nickel (II), copper (II), chromium (VI), molybdenum (VI), cadmium(II), and mercury (II). Subsequently, conversion of Salvinia harvested from these metal-spiked waters into energy (biogas) has been explored. The results indicate that Salvinia can survive and grow (multiply) for atleast a week on waters containing 10 ppm of chromium, nickel or cadmium; and < 100 ppm of zinc or molybdenum. The weed can also grow upto 4-5 days in 100 ppm of nickel and cadmium. Anaerobic digestion of the weed spiked with low concentrations (1.18 mg L-1) of each of the metals revealed that all metals studied, except chromium, enhance biogas yield. The stimulatory effect followed the trend Cu (51%) >Mo (45%) >Zn (30%) >Hg (24.4%)ͭ = Cd (23.8%) > Ni (14%). Chromium retarted biogas production by 44%.
Page(s): 204-213
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.01(4) [July 1994]

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