Developing Selenium-Enriched Animal Feed and Biofuel From Canola Planted for Managing Se-Laden Drainage Waters in the Westside of Central California

We studied the reuse of selenium (Se)-laden effluent for producing canola (Brassica napus) and subsequent bioproducts in central California. Canola was irrigated with poor quality waters [electrical conductivity (EC) of ≈5 dS m −1 sulfate-salinity, 5 mg B L −1 , and 0.25 mg Se L −1 ]. Typical seed y...

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Bibliographic Details
Published in:International journal of phytoremediation 2010-03, Vol.12 (3), p.243-254
Main Authors: Banuelos, G.S, Da Roche, J, Robinson, J
Format: Article
Language:English
Subjects:
Animal Feed - analysis
Animals
Biodegradation, Environmental
biodiesel
Biodiesel fuels
biofuel
Biofuels - analysis
blood chemistry
Brassica napus
Brassica napus - growth & development
California
Canola
canola oil
Cattle
cattle feeding
crop production
dairy cows
Dairying
drainage water
Drainage, Sanitary
Effluents
energy crops
feeds
milk
Milk - chemistry
nutrient availability
phytoremediation
rapeseed meal
Selenium
Selenium - analysis
Selenium - blood
Waste Disposal, Fluid
water pollution
Water Purification
Water quality
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Summary:We studied the reuse of selenium (Se)-laden effluent for producing canola (Brassica napus) and subsequent bioproducts in central California. Canola was irrigated with poor quality waters [electrical conductivity (EC) of ≈5 dS m −1 sulfate-salinity, 5 mg B L −1 , and 0.25 mg Se L −1 ]. Typical seed yields were 2.2 metric tons ha −1 . Seeds were processed for their oil, and transesterified to produce ASTM-quality biodiesel (BD) blends. The resulting Se-enriched seed cake meal (containing ∼2 mg Se kg −1 DM) was used in a dairy feed trial. Seventy-two Jersey and Holstein cows, 36 respectively, were fed Se-enriched canola meal as 6.2% of their daily feed ration for five weeks. Blood and milk samples were collected weekly and analyzed for total Se. This study showed that Se-enriched canola meal did not significantly increase total blood Se content in either cow breed. Milk Se concentrations did, however, significantly increase to safe levels of 59 μg Se L −1 and 52 μg Se L −1 in Jersey and Holstein cows, respectively. The production of BD 20 biofuels and Se-enriched feed meal from canola irrigated with poor quality waters may help sustain similar phytomanagement strategies under Se-rich conditions.
ISSN:1522-6514
1549-7879
DOI:10.1080/15226510903563850