Bioconversion of wastewater to single cell protein by methanotrophic bacteria

Zha, Xiao Xiong; Tsapekos, Panagiotis; Zhu, Xinyu; Khoshnevisan, Benyamin; Lü, Xiwu; Angelidaki, Irini

doi:10.1016/j.biortech.2020.124351

Cited by 69 publications

(34 citation statements)

References 43 publications

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“…However, the reliance on animal and dairy production to meet the growing demand for protein is ultimately unsustainable [3]. Hence, alternative sources should be explored to supply food for humans and animals [19].…”

Section: Mechanism Of Productionmentioning

confidence: 99%

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Single Cell Protein: A Potential Substitute in Human and Animal Nutrition

2021

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Single cell protein (SCP) is the first product of the fermentation process and has proven to be a good protein alternative. Food competition is becoming more intense as the world’s population continues to grow. Soon, SCP may be able to compensate for a protein deficit. Various global businesses are focusing on SCP production, and the scope of its application is expanding as time and knowledge increases. High quantities of SCP can be produced by microorganisms, such as algae, yeast, fungi and bacteria, due to their fast development rate and the significant level of protein in their chemical structure. Beside proteins, SCP contains carbohydrates, nucleic acids, lipids, minerals, vitamins and several important amino acids. SCP has been an effective substitute for more expensive protein sources such as fish and soybean products. In conclusion, SCP can easily replace traditional protein sources in human and animal feed without detrimental effects. Potential substrate candidates and optimization strategies for SCP production have been extensively studied. This review article focuses on the various aspects of SCP, from its production, using different substrates, player microorganisms and nutritional benefits, to its economic aspects.

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Section: Mechanism Of Productionmentioning

confidence: 99%

“…produced 41% more protein content when sewage sludge was used as substrate. They also contain essential amino acids as histidine, valine, phenylalanine, isoleucine, leucine, threonine and lysine [19]. Methylomonas, widely used for SCP production [64], reached 69% protein when fed with natural gas.…”

Section: Bacterial Sourcesmentioning

confidence: 99%

Single Cell Protein: A Potential Substitute in Human and Animal Nutrition

2021

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“…Hence, in the recent years, application of waste streams as nitrogen source for microorganisms' growth has shown a good promise with zero or negative cost when adopted to replace high-energy intensive process such as activated sludge. These waste streams include supernatant of the anaerobically digested sludge/bio-waste (ADs) [68,70,71], and food industry wastewater (FIWW), for instance, the effluent of a potato processing plant [53]. The ADs/FIWW can be considered as a promising alternative to the synthetic mediums for SCP production making the process economically more viable.…”

Section: Choice Of Microorganisms and Culture Mediumsmentioning

confidence: 99%

Conversion of biogas from anaerobic digestion to single cell protein and bio-methanol: mechanism, microorganisms and key factors - A review

Salehi¹,

Chaiprapat

2021

Environmental Engineering Research

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Biogas is a mixture of mainly CH 4 and CO 2 , which can be generated from anaerobic digestion of organic materials. The use of biogas is mostly limited to thermal energy and electricity generation. However, the abundance of cheap shale gas and solar energy could drive out biogas for such applications in the near future. Hence, alternative applications of biogas have recently received great attention among researchers across the globe. This review, for the first time, discusses the feasibility of the bioconversion of biogas to value-added products, including single cell protein as animal feed supplement, and methanol that is an important building block in the chemical industries. Mechanisms of the process, microorgnisms involved and key parameters affecting their efficiency are discussed in detail. Some future research needs are suggested in order to deepen our understanding of these biochemical processes.

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“…Microbial protein (MP), as a cutting-edge technology, can be considered as the nexus of clean energy and food security. On the one hand, it can assimilate nitrogen from digestate in the form of protein and on the other hand produce a protein-rich biomass competitive with conventional protein sources such as soybean meal and fishmeal [14][15][16]. In the 1980s, scientists made efforts to produce high-quality protein-rich microorganisms which can be used as food/feed ingredient, named MP [17].…”

Section: Introductionmentioning

confidence: 99%

Bioconversion of wastewater to single cell protein by methanotrophic bacteria

Cited by 69 publications

References 43 publications

Single Cell Protein: A Potential Substitute in Human and Animal Nutrition

Single Cell Protein: A Potential Substitute in Human and Animal Nutrition

Conversion of biogas from anaerobic digestion to single cell protein and bio-methanol: mechanism, microorganisms and key factors - A review

From renewable energy to sustainable protein sources: Advancement, challenges, and future roadmaps

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