Feasibility of using brewery wastewater for biodiesel production and nutrient removal byScenedesmus dimorphus

Abstract

This work investigates the potential use of a brewery wastewater as a medium for the cultivation of the oleaginous species Scenedesmus dimorphus with the double aim of removing nutrients and to produce biomass as feedstock for biodiesel. For this purpose, effects of nitrogen (61.8-247 mg L(-1)), phosphorous (1.4-5.5 mg L(-1)), and iron (1.5-6 mg L(-1)) concentrations on growth, nutrients uptake, lipid accumulation, and fatty acids profile of this microalga were investigated. Results showed that brewery wastewater can be used as a culture medium even if nitrogen and phosphorous concentrations should have been modified to improve both biomass (6.82 g L(-1)) and lipid accumulation (44.26%). The analysis revealed a C16-C18 composition of 93.47% fatty acids methyl esters with a relative high portion of unsaturated ones (67.24%). High removal efficiency (>99%) for total nitrogen and total phosphorous and a reduction of up to 65% in chemical oxygen demand were achieved, respectively. The final microalgae biomass, considering its high lipid content as well as its compliance with the standards for the quality of biodiesel, and considering also the high removal efficiencies obtained for macronutrients and organic carbon, makes the brewery wastewater a viable option as a priceless medium for the cultivation of microalgae.

Polishing of anaerobic secondary effluent by Chlorella vulgaris under low light intensity

“…To investigate anaerobic secondary effluent phycoremediation by microalgae under low light intensity, the present study operated bench scale bubbling column reactors fed by synthetic anaerobic secondary effluent (with different nutrients concentration) and anaerobic membrane bioreactor (AnMBR) effluent in batch modes to assess the polishing capacity (mainly nitrogen and phosphorus removal) by Chlorella vulgaris UTEX-259. This unicellular microalgae is characterized as oleaginous and might deteriorate final effluent quality by releasing metabolites (e.g., lipids) (Hultberg et al, 2016;Lutzu et al, 2016).…”

Determining Indigenous Microalgae Species in Malakand Water Bodies for Potential Use as a Biofuel Production Source

“…The strains will be further analyzed for their abilities. Scenedesmus, another important strain, were also common in the hills of Malakand and is also a promising strain for biofuel and wastewater treatment, and is in wide practice in modern research [92][93][94][95]. It is concluded from the above work that there is a great variety of algae existing in the water bodies of this area.…”

Optimization conditions for native microalgal strains grown on high ammonia-containing wastewater and their biomass utilization

“…Microalgal strains which are highly tolerant to wastewaters and NH 3 -N, with a high oxygen producing and CO 2 capturing rate, high biomass, and lipid productivity, could be used for wastewater treatment (Wang et al 2016). Among the most commonly used strains, Chlorella (Du et al 2012; AlMomani and Örmeci 2016; Ramsundar et al 2017), Chlamydomonas (Kong et al 2010;Kothari et al 2013) and Scenedesmus (Zhang et al 2015;Duangjan et al 2016;Lutzu et al 2016) are selected for their easy cultivation, their potential for high biomass production, ammonia, phosphorus removal from wastewater and the production of valuable products.…”