Microalgae biomass from swine wastewater and its conversion to bioenergy

Cheng, Dongle; Ngo, Huu‐Hao; Guo, Wenshan; Chang, Soon Woong; Nguyen, Dinh Duc; Kumar, Sanjay

doi:10.1016/j.biortech.2018.12.019

Cited by 203 publications

(56 citation statements)

References 119 publications

(115 reference statements)

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“…An assortment of research has been conducted to increase the cost-effectiveness of microalgae cultivation [3], and growing microalgae with wastewater is a potential solution to this problem, because it is inexpensive and contains nutrient sources [4]. Indeed, microalgae can treat various kind of wastewater, including those from municipal, porcine, and industrial sources [5][6][7][8]. These studies suggest the feasibility of wastewater treatment using microalgae, which can decrease nutrient cost and water demand while improving water quality by reducing nutrient levels, biochemical oxygen demand (BOD), chemical oxygen demand (COD), coliform bacteria [9], and heavy metals.…”

Section: Introductionmentioning

confidence: 99%

A Feasibility Study of Wastewater Treatment Using Domestic Microalgae and Analysis of Biomass for Potential Applications

Kim

et al. 2019

Water

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Water scarcity and emerging demands for renewable energy have increased concerns about energy security and advanced wastewater treatment, and microalgae have emerged as promising candidates to solve these problems. This study assesses the feasibility of microalgal wastewater treatment, and the utilization of the resulting microalgal biomass, as a renewable energy source. We cultured four selected microalgal species in filtered wastewater collected from the municipal treatment facility in Daegu, Republic of Korea. We measured nutrient consumption, growth rate, and physicochemical properties during cultivation, then analyzed the biomass for biochemical composition, ultimate analysis, proximate analysis, and biodiesel and lubricant properties, to estimate its potential applications. Desmodesmus sp. KNUA024 emerged as the most promising strain, removing 99.10% of ammonia nitrogen, 91.31% of total nitrogen, and 95.67% of total phosphate. Its biomass had a calorific value of 19.5 MJ kg−1, similar to terrestrial plants. α-linolenic acid was the most abundant polyunsaturated fatty acid (PUFA; 54.83%). Due to its PUFA content, Desmodesmus sp. KNUA024 also had a high iodine value, indicating its potential for use as a bio-lubricant. Therefore, Desmodesmus sp. KNUA024 shows promise for wastewater treatment, energy, and industrial applications.

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Section: Introductionmentioning

confidence: 99%

A Feasibility Study of Wastewater Treatment Using Domestic Microalgae and Analysis of Biomass for Potential Applications

Kim

et al. 2019

Water

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“…It is well known that essential trace elements play important roles in algae growth, such as structural, physiological, catalytic, and regulatory roles . Thus, trace elements are essential for the algal growth although their concentrations were low . Additionally, concentrations of metal elements in wastewaters were different from that in TAP medium.…”

Section: Resultsmentioning

confidence: 99%

Cultivation of Chlorella sorokiniana using wastewaters from different processing units of the silk industry for enhancing biomass production and nutrient removal

Deng

Xue

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Previous studies have documented that searching for wastewaters with appropriate nutrient profiles to cultivate microalgae directly was an effective measure to reduce the cost of algae cultivation. In this work, wastewaters collected from different processing units of the silk industry were used to cultivate Chlorella sorokiniana directly or after preliminary pretreatment for producing algal biomass and removing nutrients. RESULTS:The data showed that C. sorokiniana could grow on reeling wastewater and cooking cocoon wastewater with a maximum biomass of 0.26 and 0.49 g L −1 , respectively, but could not grow on frigon wastewater because of high salinity and turbidity. Furthermore, the binary mixed wastewaters were used to cultivate this alga, which were mixed according to the algal nutritional requirements. Results indicated that the highest algal biomass (0.56 g L −1 ), and total nitrogen and phosphorus removal efficiencies (71.7% and 97.1%) were obtained when frigon wastewater was diluted with reeling wastewater (v/v) at a dilution multiple of eight, which was used as the algal culture media. Additionally, contents of protein, lipids, carbohydrates, and pigments in the algal cells varied with the changes in nutrient profiles of wastewaters. CONCLUSIONS: It is concluded that (i) reeling wastewater and cooking cocoon wastewater were rich in nutrients for the growth of C. sorokiniana, which could be used as algal culture medium directly; and (ii) growing C. sorokiniana on mixed wastewaters could enhance biomass production and nutrient removal. Thus, the silk industry wastewaters could be considered as suitable media to cultivate microalgae directly or by simply mixing. Figure 4. Variations in the concentrations of nutrients and the culture's pH when Chlorella sorokiniana grew on the mixed silk industry wastewater (SIW) for 7 days. (a) Total nitorgen (TN) removal; (b) total phosphorus (TP) removal; (c) chemical oxygen demand (COD) removal; and (d) pH variation. Each point represents the mean of three replicates, and the error bars represent the standard deviation.wileyonlinelibrary.com/jctb

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“…Different microorganisms, microalgae and cyanobacteria were preselected according to previous experience and the bibliography [18][19][20]. We selected only robust strains suitable for large-scale production under non-optimally controlled conditions ( Table 2).…”

Section: Microorganisms and Culture Mediamentioning

confidence: 99%

Comparative evaluation of microalgae strains for CO2 capture purposes

Sepúlveda

Gómez-Serrano

Bahraoui

et al. 2019

Journal of CO2 Utilization

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In this paper we have compared eleven microalgae/cyanobacteria strains used for the development of a CO 2 capture process. Firstly, we studied the tolerance of the selected strains to the water quality available at the production site. The results confirmed that no toxins were present in the water used; in addition, we confirmed that fertilizers could be utilised as the nutrient source instead of pure chemicals. Secondly, the strains were evaluated in terms of growth rate, biomass productivity and photosynthetic efficiency concluding that Scenedesmus almeriensis, Neochloris oleoabundans and bloom from the River Seine were the most productive, above 1.0 g•L −1 •day −1. Thirdly, we determined the biochemical composition of the biomass with the results showing that most of the strains mainly accumulate carbohydrates in the stationary phase, over 60% d.wt.; the exceptions were Neochloris oleoabundans and Chlorella vulgaris, which accumulate lipids, above 20% d.wt. In any case, the performance of the microalgae strains was better than that of cyanobacteria both in terms of biomass productivity and the biochemical composition; consequently, using these types of microorganisms is recommended. By considering a fixed value for the main biomass components, we concluded that the most promising strains were Scenedesmus almeriensis, Neochloris oleoabundans and bloom from the River Seine, yielding a biomass value above 0.6 €•kg −1 and an economic value higher than 0.7 €•m-3 •day −1. These figures confirm that, in order to obtain profitable CO 2 capture processes and to develop more efficient production systems that reduce current production costs, coupling with wastewater treatment schemes is required.

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Microalgae biomass from swine wastewater and its conversion to bioenergy

Cited by 203 publications

References 119 publications

A Feasibility Study of Wastewater Treatment Using Domestic Microalgae and Analysis of Biomass for Potential Applications

A Feasibility Study of Wastewater Treatment Using Domestic Microalgae and Analysis of Biomass for Potential Applications

Cultivation of Chlorella sorokiniana using wastewaters from different processing units of the silk industry for enhancing biomass production and nutrient removal

Comparative evaluation of microalgae strains for CO2 capture purposes

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