Simultaneous nutrient removal and lipid production with Chlorella vulgaris on sterilized and non-sterilized anaerobically pretreated piggery wastewater

Marjakangas, Jatta M.; Chen, Chun‐Yen; Lakaniemi, Aino–Maija; Puhakka, Jaakko A.; Whang, Liang Ming; Chang, Jo Shu

doi:10.1016/j.bej.2015.07.011

Cited by 36 publications

(15 citation statements)

References 34 publications

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“…Although it is not clear from the present study why the particular treatment was effective, a 2-h (twice) autoclaving approach showed better extraction than the 1-h (single) autoclave result. Autoclaving for an extended time at high temperature could eliminate bacterial and protozoal invaders, which may be limiting factors for microalgae growth ( Marjakangas et al., 2015 ). Marjakangas et al.…”

Section: Discussionmentioning

confidence: 99%

“…Autoclaving for an extended time at high temperature could eliminate bacterial and protozoal invaders, which may be limiting factors for microalgae growth ( Marjakangas et al., 2015 ). Marjakangas et al. (2015) also noted that the final biomass of C. vulgaris was higher in sterilised wastewater compared to unsterilised wastewater.…”

Section: Discussionmentioning

confidence: 99%

“…As for modified SEs, media + 105 °C twice, media + 121 °C, and media + 121 °C twice have the high values of maximum OD in KP SE. Autoclaving for an extended time at high temperature could eliminate bacterial and protozoal invaders, which can limit microalgal growth ( Marjakangas et al., 2015 ). Marjakangas et al.…”

Section: Discussionmentioning

confidence: 99%

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Enhancement of targeted microalgae species growth using aquaculture sludge extracts

Arumugam

Ahmad

Yaacob

et al. 2020

Heliyon

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Natural growth-promoting nutrients extracted from aquaculture sludge waste can be used to maximise microalgal growth. This study identified the influence of aquaculture sludge extract (SE) on four microalgae species. Conway or Bold's Basal Media (BBM) was supplemented with SE collected from a Sabak Bernam shrimp pond (SB) and Kota Puteri fish pond (KP), and tested using a novel microplate-incubation technique. Five different autoclave extraction treatment parameters were assessed for both collected SE, i.e., 1-h at 105 °C, 2-h at 105 °C, 1-h at 121 °C, 2-h at 121 °C, and 24-h at room temperature (natural extraction). Microalgae culture in the microplates containing control (media) and enriched (media + SE) samples were incubated for nine days, at 25 °C with the light intensity of 33.75 μmol photons m −2 s −1 at 12-h light/dark cycle. The total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP) in KP SE were 44.0–82.0 mg L −1 and 0.96–8.60 mg L −1 . TDN (8.0%–515.0%) and TDP (105%–186 %) were relatively higher in KP SE compared to SB SE. The growth of microalgae species Nannochloropsis ocenica showed significant differences ( p < 0.05) between the five extraction treatments from SB and the control. However, Chlorella vulgaris , Neochloris conjuncta , and Nephroclamys subsolitaria showed no significant differences ( p > 0.05) in SB SE. N. ocenica , C. vulgaris , and N. conjuncta showed significant differences ( p < 0.05) between five extraction treatments from KP and the control while N. subsolitaria showed no significant difference ( p > 0.05). The specific growth rate (SGR) in the exponential phase of all microalgae species were relatively higher in SB SE compared to KP SE. While the organic matter content of KP SE was relatively higher, there were no significant differences in microalgae growth compared to SB SE. Nonetheless, modified SE did influence microalgae growth compared to the control. This study shows that modified SE could be used as enrichment media for microalgae cultivation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Enhancement of targeted microalgae species growth using aquaculture sludge extracts

Arumugam

Ahmad

Yaacob

et al. 2020

Heliyon

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“…Microalgae, known as new sources of biofuel production, have features such as extensive distribution, wide adaptability, rapid growth and high lipid content [1,2] . Microalgae can grow in different kinds of wastewater, which reduces the cost of microalgae cultivation and mitigates pollution [3,4] .…”

Section: Introductionmentioning

confidence: 99%

Life cycle assessment of biofuel production from microalgae cultivated in anaerobic digested wastewater

Zhang

et al. 2020

International Journal of Agricultural and Biological Engineering

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The whole process of biofuel production from Desmodesmus sp. EJ 8-10 cultivated in anaerobic digested wastewater (ADW) under the optimal temperature was evaluated by using the method of Life Cycle Assessment (LCA). The energy efficiency and environment emissions were under considerable for the corresponding parametric study. The functional unit was 1 kg microalgae. It was concluded that the harvest stage was responsible for the main energy consumption during the microalgal whole pyrolysis process. The energy conversion efficiency of the whole process was larger than 1, which indicated that the process was profitable. The environmental impact of the whole process was 1165.67 mPE T2000 , among which the primary impact on the environment was eutrophication that accounts for 57.36%, followed by photochemical ozone synthesis (22.56%), acidification (17.36%); and global warming (2.73%), respectively.

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“…To date, there have been a number of studies regarding the technology of culturing Chlorella with sterilized piggery/swine wastewater [18–31]. However, little work has been reported on culturing Chlorella with unsterilized piggery/swine wastewater for biofuel production [32]. Therefore, the feasibility of culturing Chlorella with unsterilized piggery wastewater for biofuel production needs to be further demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive evaluation of a cost-effective method of culturing Chlorella pyrenoidosa with unsterilized piggery wastewater for biofuel production

Zhang

et al. 2019

Biotechnol Biofuels

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Background The utilization of Chlorella for the dual goals of biofuel production and wastewater nutrient removal is highly attractive. Moreover, this technology combined with flue gas (rich in CO 2 ) cleaning is considered to be an effective way of improving biofuel production. However, the sterilization of wastewater is an energy-consuming step. This study aimed to comprehensively evaluate a cost-effective method of culturing Chlorella pyrenoidosa in unsterilized piggery wastewater for biofuel production by sparging air or simulated flue gas, including algal biomass production, lipid production, nutrient removal rate and the mutual effects between algae and other microbes. Results The average biomass productivity of C. pyrenoidosa reached 0.11 g L −1 day −1 /0.15 g L −1 day −1 and the average lipid productivity reached 19.3 mg L −1 day −1 /30.0 mg L −1 day −1 when sparging air or simulated flue gas, respectively. This method achieved fairish nutrient removal efficiency with respect to chemical oxygen demand (43.9%/55.1% when sparging air and simulated flue gas, respectively), ammonia (98.7%/100% when sparging air and simulated flue gas, respectively), total nitrogen (38.6%/51.9% when sparging air or simulated flue gas, respectively) and total phosphorus (42.8%/60.5% when sparging air or simulated flue gas, respectively). Culturing C. pyrenoidosa strongly influenced the microbial community in piggery wastewater. In particular, culturing C. pyrenoidosa enriched the abundance of the obligate parasite Vampirovibrionales, which can result in the death of Chlorella . Conclusion The study provided a comprehensive evaluation of culturing C. pyrenoidosa in unsterilized piggery wastewater for biofuel production. The results indicated that this cost-effective method is feasible but has considerable room for improving. More importantly, this study elucidated the mutual effects between algae and other microbes. In particular, a detrimental effect of the obligate parasite Vampirovibrionales on algal biomass and lipid production was found. Electronic supplementary material The online version of this article (10.1186/s13068-019-1407-x) contains supplementary material, which is available to authorized users.

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Simultaneous nutrient removal and lipid production with Chlorella vulgaris on sterilized and non-sterilized anaerobically pretreated piggery wastewater

Cited by 36 publications

References 34 publications

Enhancement of targeted microalgae species growth using aquaculture sludge extracts

Enhancement of targeted microalgae species growth using aquaculture sludge extracts

Life cycle assessment of biofuel production from microalgae cultivated in anaerobic digested wastewater

Comprehensive evaluation of a cost-effective method of culturing Chlorella pyrenoidosa with unsterilized piggery wastewater for biofuel production

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