Biodiesel production through algal cultivation in urban wastewater using algal floway

Abstract

A B S T R A C TThe aim of this work was to study algal floway (AFW) to treat urban wastewater and to evaluate biomass productivity, lipid contents and biodiesel production. The results indicated the seasonal average algae productivity of 34.83 g dry weight m 2 d −1 with a nutrient removal rate of 2.52 g m 2 d −1 N and 1.25 g m 2 d −1 P while the lipid content ranged between 14 and 22% of dry cell weight with the highest lipid productivity of 9.29 g m −2 d −1 during summer. Biodiesel quality was superior during summer with high centane number and cold filter plugging point values. High eicosapentaenoic acid content was found during winter growth cycles. AFW algae community was dominated by pennate diatoms during all growing seasons. This study is one of its kinds in Indian wastewaters and it provides fundamental information for further optimization and use of AFW to treat domestic wastewater and to produce algae biofuel feedstock.quantities of untreated domestic wastewater in urban and semi-urban areas, using this water as a source for nutrients for algae feedstock production is an attractive option to offset the biodiesel production costs (Craggs et al., 2011).Algae culture technologies like raceway ponds and photobioreactors are in use for decades but they are expensive and energy intensive due to which net energy recovered from algae oil is high (Chisti, 2013). Method of cultivation plays a key role in how the biomass can be https://doi.

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

“…The composition of fatty acids extracted from Scenedesmus obliquus was shown in Table 2. C16:0 (palmitic acid) and C18:1 (oleic acid) were the main components, being ideal for biodiesel production [38]. The highest proportion of C18:1 (55.8%) was observed following treatment with 0.1 mg N L −1 of NaNO3.…”

Avaliação De Formação De Biofilme Perifítico E Identificação De Microalgas Em Um Sistema Piloto Algal Turf Scrubber

“…Por exemplo, os lipídios são os metabólicos primários produzidos pelas microalgas e que normalmente são usados para a produção de biodiesel, já a composição dos ácidos graxos juntamente com o teor de carotenoides, possuem uma atenção maior, pois podem ser voltados para a produção de produtos de maior valor agregado. A composição bioquímica da biomassa das microalgas é determinada pela natureza de cada espécie algal, pela forma de cultivo e de fatores como a intensidade de luz, temperatura, pH, nutrientes e concentração de CO2 (FERREIRA et al, 2013;MARELLA et al, 2019).…”

Diatoms’ Breakthroughs in Biotechnology: <i>Phaeodactylum tricornutum</i> as a Model for Producing High-Added Value Molecules

“…Diatoms exhibit optimal criteria such as high growth rates, tolerance of harsh environmental conditions, and performance in large scale cultures [134]. Whereas, making their productivity ecologically viable mandatory needs developing novel methods of algal biomass production [140].…”