Semi-continuous removal of nutrients and biomass production from domestic wastewater in raceway reactors using Chlorella variabilis TH03-bacteria consortia

Do, Thi Cam Van; Nguyen, Thi Nham Tuat; Tran, Dang Thuan; Le, Truong Giang; Nguyen, Van Tuyen

doi:10.1016/j.eti.2020.101172

Cited by 15 publications

(4 citation statements)

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“…Authors who have used Chlorella sp. in domestic wastewater have reported biomass concentrations between 0.5 and 2.0 g•dm -3 [JAIMES- DUARTE et al 2012;LI et al 2008; VAN DO et al 2020]. However, in this study, wastewater with a much higher organic matter content than domestic wastewater was used, increasing its complexity to be assimilated by microorganisms.…”

Section: Growth Kinetics At a 100 Dm 3 Scalementioning

confidence: 90%

Journal of Water and Land Development

Urbina-Suarez,

Barajas-Solano,

Garcia-Martinez

et al. 2021

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The production of biofuels using wastewater as a microalgae culture medium is a little explored technology, but with potential for success. In order to contribute to the knowledge of these technologies and their technical feasibility for microalgae growth, in this work the Chlorella sp. strain was cultivated in two types of effluents generated in an experimental farm located in eastern Colombia, before and after a biological treatment process. The consumption of the main nutrients that regulate growth and lipid production was evaluated, in order to extract, quantify, characterize and convert them into biodiesel. The results showed that Chlorella sp. growth and lipid production is more favourable in R2 medium of treated water than in R1 medium of raw water, mainly due to phosphorus limitation and higher N-NO 3 concentration in R2 compared to R1. In the R2 medium culture, a percentage of 42.54% of long-chain fatty acids was found, which is necessary to obtain a high quality biodiesel. Finally, the best transesterification experiment allowed reaching a fatty acid methyl esters (FAME) percentage of 90.1 ± 2.7%. In general, the results demonstrated the potential viability of using the wastewater generated in the San Pablo farm to produce biomass with lipid content to obtain biodiesel, finding that where the concentration of nutrients, mainly nitrogen, has a great influence on the microalgal metabolism for lipid accumulation.

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Section: Growth Kinetics At a 100 Dm 3 Scalementioning

confidence: 90%

Journal of Water and Land Development

Urbina-Suarez,

Barajas-Solano,

Garcia-Martinez

et al. 2021

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“…The maximum potential for total nitrogen (TN) and total phosphate (TP) removals from municipal wastewater were found for Chlorella variabilis TH03 at a 96.8% and 100% removal rate [37]. The other microalgae removed between 28% and 95% of total nitrogen and between 12% and 99% of total phosphate.…”

Section: Microalgae Treatment Of Domestic Wastewatermentioning

confidence: 99%

“…. Nutrients and COD removals from domestic wastewater by microalgae [12,13,16,20,21,23,25,27,28,31,[33][34][35]37,[41][42][43][44][45][46][47][48][49][50][51]. COD (chemical oxygen demand), NO 3 -N (nitrate-nitrogen), NO 2 -N (nitrite-nitrogen), NH 4 -N (ammonium-nitrogen), PO 4 -P (orthophosphate phosphate), TN (total nitrogen), TP (total phosphate) and nr (not reported).…”

Section: Microalgae Treatment Of Domestic Wastewatermentioning

confidence: 99%

Recent Trends on Domestic, Agricultural and Industrial Wastewaters Treatment Using Microalgae Biorefinery System

Bakraoui

Slaoui²,

Mabrouki

et al. 2022

Applied Sciences

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In addition to producing bioenergy and molecules with high added value, microalgae have been recognized as an efficient microorganism for wastewater treatment. However, a major obstacle preventing its widespread use is the high energy cost of pretreatment, cultivation and downstream processes. Different types of wastewaters have been tested as culture mediums for microalgal biorefinery system. This review gives a summary of the most used microalgae strains for wastewater treatment, as well as information on the physical and chemical characteristics of domestic, agricultural, and industrial wastewaters. It also discusses wastewater pretreatment techniques, nutrient uptake and removal, biomass production and biomolecules productivities. There is also discussion on how microalgae remove contaminants from wastewater. Additionally, the problems and restrictions of microalgae-based wastewater treatment are explored, and recommendations are made for additional study and advancement. This literature review demonstrates that microalgae monoculture systems have proven to be beneficial as an innovative wastewater treatment technology, due to its high efficiencies in pollutant removals and biomolecule production; however, the upstream and downstream treatment pose a limit to industrialize the process. Until now, there has been no conventional design of the wastewater treatment process using microalgae in the biorefinery system, which constitutes a huge gap to assess a real life cycle assessment (LCA) and techno economic analysis (TEA).

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“…6 It was reported in the study by Do et al (2020) that higher biomass productivity was achieved in a semi-continuous mode for nutrient removal. 7 This shows that the microalgae–bacteria consortium has the potential to enhance both the production of microalgae-based biofuel and biomass in the future.…”

Section: Introductionmentioning

confidence: 99%