Biodiesel production potential of wastewater treatment high rate algal pond biomass

Mehrabadi, Abbas; Craggs, Rupert J.; Farid, Mohammed

doi:10.1016/j.biortech.2016.09.028

Cited by 45 publications

(16 citation statements)

References 46 publications

(108 reference statements)

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“…The required application of a resultant product defines the optimum treatment conditions. There is a significant number of studies proving the use of microalgae for bio‐oil and biodiesel production, however, little attention is being paid towards sole char yielding bio‐refineries. The main objective of the study is to provide recommendation towards the utilisation of these different types of biomass in bio‐refineries at a single point via different treatment temperatures.…”

Section: Introductionmentioning

confidence: 99%

Carbon conversion and stabilisation of date palm and high rate algal pond (microalgae) biomass through slow pyrolysis

et al. 2019

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Summary The processing of waste through pyrolysis technology is gaining momentum worldwide and is considered to be a green technology to reduce CO2 emissions. This study is devoted to analysing the lignocellulosic biomass (date palm) and wastewater‐derived microalgae and the carbon‐rich char produced between temperature range (400°C‐600°C) from these biomass types. The properties of microalgae char showed that significant variation with date palm char exhibited high heating values (24‐28 MJ/kg), low ash content (11%‐16%), and high energy yield (48%‐42%). Algal biomass char showed considerably high nitrogen content (6%‐7%) as compared with date palm char (<1%), lower stability, and more significant influence on the price with respect to treatment temperature. Quaternary, pyrrolic, and pyridinic nitrogen species were found on the surface of the microalgae char, whereas no nitrogen species detected on date palm char due to low nitrogen content. The activation energy was also noted to be high for algal char during pyrolysis and combustion process. It can be concluded that date palm char is suitable for energy applications, whereas, algal char can be used for soil amendment, wastewater treatment, and applications requiring nitrogen‐doped char.

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Section: Introductionmentioning

confidence: 99%

Carbon conversion and stabilisation of date palm and high rate algal pond (microalgae) biomass through slow pyrolysis

et al. 2019

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“…The biofuel yield from microalgae was estimated to be 10 ~ 20 times higher than those from oleaginous seeds and vegetable oils (Chisti, 2007). In microalgae based wastewater treatment, pollutants can be ecologically and safely removed through microalgae assimilation, with the added benefit of biofuel production (Mehrabadi et al, 2016;Tan et al, 2016). However, microalgae harvesting still remains a challenge due to the small cell size, electrical stability and low density in growth media (Cerff et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Synergy of flocculation and flotation for microalgae harvesting using aluminium electrolysis

Shi

Zhu

Chen

et al. 2017

Bioresource Technology

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Microalgae are often used as feedstock for renewable biofuel production and as pollutant up-takers for wastewater treatment; however, biomass harvesting still remains a challenge in field applications. In this study, electro-flocculation using aluminium electrolysis was tested as a method to collect Chlorella vulgaris. The electrolysis products were positively charged over a wide pH range below 9.5, which gave them a flocculation potential for negatively charged microalgae. As flocculants were in-situ generated and gradually released, microalgae flocs formed in a snowballing mode, resulting in the compaction of large flocs. When higher current density was applied, microalgae could be harvested more rapidly, although there was a trade-off between a higher energy use and more residual aluminium in the culture medium. Benefits of this flocculation method are twofold: the phosphate decrease in post-harvesting could improve nutrient removal in microalgae based wastewater treatment, while the ammonium increase may favor microalgae recovery for medium recycling.

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“…The cells produce polyunsaturated fatty acids under high CO 2 concentrations. A 6% lipid content increase was observed accompanied by a 10-15% increase in CO 2 supply [30].…”

Section: Influence Of Carbon Dioxidementioning

confidence: 87%

Algal Fuel Cell

Sivakumar¹,

Karuppasamy²,

Nagarajan³

et al. 2018

Microalgal Biotechnology

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Algal Fuel Cells (AFC) are bioelectric devices that use photosynthetic organisms to turn light and biochemical energy into electrical energy. The potential of a fully biotic AFC still remains an unexplored area of research and hence it has led to rethink the prospective use of plant-based bioelectricity. AFC consists of an anode and a cathode connected by an external electric circuit and separated internally by a membrane/no membrane in which the growth of algae is assessed. The key parameters for evaluating the performance of AFC are electrodes, separators, oxygen supplement, nutrients and its configurations. By controlling these parameters, the electric power production can be optimized. This chapter discusses the recent trends examined by a number of researchers and are interpreted to gain a better understanding. It is stressed that a greater focus must be given for a complete comprehension of the algal processes required for the development of AFC applications. Thus, it can be concluded that a further development of AFC technology with reduced costs and improved performance is required for sustainable development.

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Biodiesel production potential of wastewater treatment high rate algal pond biomass

Cited by 45 publications

References 46 publications

Carbon conversion and stabilisation of date palm and high rate algal pond (microalgae) biomass through slow pyrolysis

Carbon conversion and stabilisation of date palm and high rate algal pond (microalgae) biomass through slow pyrolysis

Synergy of flocculation and flotation for microalgae harvesting using aluminium electrolysis

Algal Fuel Cell

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