Effects of inoculum size, light intensity, and dose of anaerobic digestion centrate on growth and productivity of Chlorella and Scenedesmus microalgae and their poly-culture in primary and secondary wastewater

Bohutskyi, Pavlo; Kligerman, Débora Cynamon; Byers, Natalie; Nasr, Laila Khaled; Cua, Celine; Chow, Steven J.; Su, Chunyang; Tang, Yuhan; Betenbaugh, Michael J.; Bouwer, Edward J.

doi:10.1016/j.algal.2016.09.010

Cited by 144 publications

(56 citation statements)

References 83 publications

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“…Other investigations also reported that the growth rate of Phaeodactylum tricornutum and Chlorella sp. increased when they were inoculated at low concentrations . As reviewed by Chen et al .…”

Section: Resultsmentioning

confidence: 99%

Treatment of real aquaculture wastewater from a fishery utilizing phytoremediation with microalgae

Liu

Feng

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: In this study, five microalgal species (Chlorella vulgaris, Chlorococcum sp. GD, Parachlorella kessleri TY, Scenedesmus quadricauda, and Scenedesmus obliquus) were cultivated in batch mode to evaluate their respective potential for the treatment of real aquaculture wastewater from a fishery. Subsequently, the microalga with the best performance was cultivated with different initial inoculation concentrations to evaluate the effect of initial inoculation on pollutant removal efficiency. RESULTS: When real aquaculture wastewater was inoculated with exogenous microalgae, the growth of both indigenous microalgae and bacteria was significantly inhibited. Pollutant removal was closely related to exogenous inoculationof microalgae. Parachlorella kessleri TY had high growth potential and pollutant removal capability in aquaculture wastewater, compared with the other four microalgae. When the wastewater was inoculated with low biomass concentrations of P. kessleri TY (50-100 mg L −1 ), it grew well and degraded most of the encountered pollutant. In particular, P. kessleri TY with 100 mg L −1 of inoculation concentration removed 94.4% of COD, 96.2% of ammonium, 99% of nitrite, 94.3% of nitrate, and 95.6% of phosphorus after 3 days of cultivation. CONCLUSIONS: Both the screening for microalgal species and the regulation of initial inoculation concentrations are promising approaches to enhance pollutant removal efficiency from real aquaculture wastewater. Determination of water qualityTo determine the water quality, the microalgal suspension was centrifuged at 5000 rpm for 5 min and the supernatant J Chem Technol Biotechnol 2019; 94: 900-910 /jctb up to 94.4%, 96.2%, 99%, 94.3%, and 95.6% for COD, ammonium, nitrite, nitrate, and total phosphorus, respectively. In the remaining tested inoculation concentrations (25, 50, 200, and 400 mg L −1 ), 77.8-88.9% of COD, 54.2-86.1% of ammonium, 64.1-91.7% of nitrite, 57.1-85.7% of nitrate, and 53-81.4% of total phosphorus were removed from the aquaculture wastewater J Chem Technol Biotechnol 2019; 94: 900-910

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Section: Resultsmentioning

confidence: 99%

Treatment of real aquaculture wastewater from a fishery utilizing phytoremediation with microalgae

Liu

Feng

et al. 2018

J of Chemical Tech & Biotech

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“…Microalgal-bacterial processes have been reported as a suitable technology for the removal of organic matter and nutrients from centrates generated in sludge thickening or from anaerobic digestion processes. 1,2 Removal performances of total organic carbon, nitrogen, and phosphorus ranging from 75% to 100% have been consistently recorded in microalgal-bacterial systems treating centrate. [3][4][5][6] These processes are based on the aerobic oxidation of organic matter by heterotrophic bacteria, which produce carbon dioxide (CO 2 ) that is taken up by microalgae.…”

Section: Introductionmentioning

confidence: 97%

Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

Vital‐Jácome

Díaz‐Zamorano

Cuautle-Marín

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Centrate treatment using microalgal-bacterial processes might be limited by the hydraulic retention time (HRT) required to achieve satisfactory chemical oxygen demand (COD) and nutrients removal. Moreover, the poor settling of microalgal biomass still limits the technical and economic performance of microalgal-bacterial processes. In this work, the performance of microalgal-bacterial aggregates (MABAs) supplied with flue gas was investigated as an effective strategy to improve the treatment of centrate from anaerobic digestion of winery wastewater. RESULTS: MABAs supplied with flue gas achieved maximum soluble COD, N-NO 3− , P-PO 4 3− and N-NH 4 + removal efficiencies of 95%, 94%, 100%, and 100%, respectively, in five-fold centrate dilution within 7 days of operation. Centrate turbidity or its components did not hinder the performance of the MABAs under the conditions tested and no aggregates were formed in controls without MABAs inoculation. The mean diameter of the MABAs after centrate treatment was the same or even larger than that of the aggregates of the inoculum. Scanning electron microscopy analyses showed that the liquid medium composition influenced the structure and the type of microalgae cells established in the MABAs. CONCLUSION: MABAs-based centrate treatment supported by flue gas is a promising technology for improving COD and nutrients removal from centrate as well as further biomass harvesting.

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“…The anaerobic digestion of algal biomass is still a challenge because of unbalanced nutrient composition and low biodegradability (Bohutskyi et al, 2016). The limitations include a huge investment in biomass generation, inadequate degradation of algal cells, a sluggish rate of bioconversion of biogas, and high sensitivity of methanogens (Bohutskyi et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Methane Yield by Codigestion of Sewage Sludge with Microalgae and Catering Waste Leachate

Siddique

Wahid

2018

Water Environment Research

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The codigestion of different wastes is a promising concept to improve methane generation during anaerobic processes. However, the anaerobic codigestion of catering waste leachate with algal biomass and sewage sludge has not been studied to date. The present study investigated methane generation by the anaerobic codigestion of different mixtures of catering waste leachate, microalgal biomass, and sewage sludge. Codigestion of waste mixture containing equal ratios of three substrates had 39.31% higher methane yield than anaerobic digestion of raw sludge. This was possibly because of a proliferation of methanogens during the codigestion period, induced by multiphase digestion of different wastes with different degrees of digestibility. Therefore, codigestion of catering waste leachate, microalgal biomass, and sewage sludge appears to be an efficient technology for energy conversion from waste resources. The scientific application of this codigestion technology with these three substrates may play a role in solving important environmental issues of waste management.

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Effects of inoculum size, light intensity, and dose of anaerobic digestion centrate on growth and productivity of Chlorella and Scenedesmus microalgae and their poly-culture in primary and secondary wastewater

Cited by 144 publications

References 83 publications

Treatment of real aquaculture wastewater from a fishery utilizing phytoremediation with microalgae

Treatment of real aquaculture wastewater from a fishery utilizing phytoremediation with microalgae

Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

Enhanced Methane Yield by Codigestion of Sewage Sludge with Microalgae and Catering Waste Leachate

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