The Effects of Hot Water and Ultrasonication Pretreatment of Microalgae (Nannochloropsis oculata) on Biogas Production in Anaerobic Co-Digestion with Cow Manure

被引:14
作者
Saleem, Muhammad [1 ]
Hanif, Muhammad Usman [2 ,3 ]
Bahadar, Ali [4 ]
Iqbal, Hamid [2 ,5 ]
Capareda, Sergio C. [3 ]
Waqas, Adeel [6 ]
机构
[1] King Abdulaziz Univ, Dept Ind Engn, Rabigh 21911, Saudi Arabia
[2] Natl Univ Sci & Technol, Inst Environm Sci & Engn, Sch Civil & Environm Engn, Sect H-12, Islamabad 45710, Pakistan
[3] Texas A&M Univ, Bioenergy Testing & Anal Lab BETA Lab, Biol & Agr Engn Dept, College Stn, TX 77843 USA
[4] King Abdulaziz Univ, Dept Chem & Mat Engn, Rabigh 21911, Saudi Arabia
[5] Rawalpindi Waste Management Co, A-81,Iran Rd, Satellite Town 46300, Rawalpindi, Pakistan
[6] Natl Univ Sci & Technol, Ctr Adv Studies Energy, Islamabad 45710, Pakistan
关键词
microalgae; cotton gin trash; co-digestion; hydrocarbon; alternative energy; biogas; WASTE;
D O I
10.3390/pr8121558
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Anaerobic co-digestion provides a promising solution for converting inexpensive carbon from wastes to biogenic methane. We used microalgae (Nannochloropsis oculata) with cow manure and sludge to produce a better quantity and quality of biogas. To further improve the gas production, microalgae were pretreated with ultrasonication, hot water, and a combination of both. Interestingly, the results showed that the pretreatment of microalgae decreased biogas production by 5 to 30%. The no-pretreatment runs produced a maximum of 118 L of biogas. The relative content of biogenic methane was higher in the pretreated feedstock (48 to 52%) in comparison with the no-pretreatment runs (44%). The conversion of volatile suspended solids present in the feedstock to total biogenic methane production was highest in hot-water-treated runs. The carbon content in the gas produced by the pretreated microalgae peaked (38%) in the middle of the experiment (i.e., at 45 days), whereas for no-pretreatment runs, the content remained constant from the start to the middle and declined (from 36 to 34%) at the end of the experiment (i.e., at 90 days). We also report the chemical structure of microalgae with and without pretreatments.
引用
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页码:1 / 10
页数:10
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