Enhancement of aerobic granulation and nutrient removal by an algal–bacterial consortium in a lab-scale photobioreactor

Zhang, Bing; Lens, Piet N.L.; Shi, Wenxin; Zhang, Ruijun; Zhang, Zhiqiang; Guo, Yuan; Bao, Xian; Cui, Fuyi

doi:10.1016/j.cej.2017.11.151

Cited by 203 publications

(57 citation statements)

References 46 publications

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“…In the case of nutrient deficiency, some EPS can be utilized as carbon sources by its own producers [63]. Experiments have proved that EPS can be secreted in algal-bacterial granules systems, which can promote the nutrient removal efficiency, enhance aerobic granulation, improve physico-chemical properties and strengthen system stability [64].…”

Section: Resultsmentioning

confidence: 99%

Bibliometric Analysis of Algal-Bacterial Symbiosis in Wastewater Treatment

Chen

et al. 2019

IJERPH

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In recent years, the algae-bacteria symbiotic system has played a significant role in the sustainable development of wastewater treatment. With the continuous expansion of research outputs, publications related to wastewater treatment via algal-bacterial consortia appear to be on the rise. Based on SCI-EXPANDED database, this study investigated the research activities and tendencies of algae-bacteria symbiotic wastewater treatment technology by bibliometric method from 1998 to 2017. The results indicated that environmental sciences and ecology was the most productive subject categories, followed by engineering. Bioresource Technology was the most prominent journal in this field with considerable academic influence. China (146), USA (139) and Spain (76) had the largest amount of publications. Among them, USA was in a leading position in international cooperation, with the highest h-index (67) in 79 countries/territories. The cooperation between China and USA was the closest. The cooperative publishing rate of the Chinese Academy of Sciences was 83.33%, but most of them were in cooperation with domestic institutions, while international cooperation was relatively limited. Methane production, biofuel production, and extracellular polymeric substance were future focal frontiers of research, and this field had gradually become a multi-perspective and inter-disciplinary approach combining biological, environmental and energy technologies.

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Section: Resultsmentioning

confidence: 99%

Bibliometric Analysis of Algal-Bacterial Symbiosis in Wastewater Treatment

Chen

et al. 2019

IJERPH

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“…The harvested biomass can be processed for biofuel generation without any loss of quality [11, 12]. There have been quite a few studies on the algal–algal and algal–bacterial interactions for bio-harvesting of algal cells from bulk media [13–20]. A very recent approach is the use of filamentous fungi for harvesting algal cells [21–23].…”

Section: Introductionmentioning

confidence: 99%

Potential role of N-acetyl glucosamine in Aspergillus fumigatus-assisted Chlorella pyrenoidosa harvesting

Bhattacharya

Mathur

Kumar

et al. 2019

Biotechnol Biofuels

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Background Algal harvesting is a major cost which increases biofuel production cost. Algal biofuels are widely studied as third-generation biofuel. However, they are yet not viable because of its high production cost which is majorly contributed by energy-intensive biomass harvesting techniques. Biological harvesting method like fungal-assisted harvesting of microalgae is highly efficient but poses a challenge due to its slow kinetics and poorly understood mechanism. Results In this study, we investigate Aspergillus fumigatus – Chlorella pyrenoidosa attachment resulting in a harvesting efficiency of 90% within 4 h. To pinpoint the role of extracellular metabolite, several experiments were performed by eliminating the C. pyrenoidosa or A. fumigatus spent medium from the C. pyrenoidosa – A. fumigatus mixture. In the absence of A. fumigatus spent medium, the harvesting efficiency dropped to 20% compared to > 90% in the control, which was regained after addition of A. fumigatus spent medium. Different treatments of A. fumigatus spent medium showed drop in harvesting efficiency after periodate treatment (≤ 20%) and methanol–chloroform extraction (≤ 20%), indicating the role of sugar-like moiety. HR-LC–MS (high-resolution liquid chromatography–mass spectrometry) results confirmed the presence of N -acetyl- d -glucosamine (GlcNAc) and glucose in the spent medium. When GlcNAc was used as a replacement of A. fumigatus spent medium for harvesting studies, the harvesting process was significantly faster ( p < 0.05) till 4 h compared to that with glucose. Further experiments indicated that metabolically active A. fumigatus produced GlcNAc from glucose. Concanavalin A staining and FTIR (Fourier transform infrared spectroscopy) analysis of A. fumigatus spent medium- as well as GlcNAc-incubated C. pyrenoidosa cells suggested the presence of GlcNAc on its cell surface indicated by dark red dots and GlcNAc-specific peaks, while no such characteristic dots or peaks were observed in normal C. pyrenoidosa cells. HR-TEM (High-resolution Transmission electron microscopy) showed the formation of serrated edges on the C. pyrenoidosa cell surface after treatment with A. fumigatus spent medium or GlcNAc, while Atomic force microscopy (AFM) showed an increase in roughness of the C. pyrenoidosa cells surface upon incubation with A. fumigatus spent medium. Conclusions Results strongly suggest that GlcNAc prese...

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“…In addition, the algal-bacterial granular symbiosis system can be successfully achieved by using mature AGS (Liu et al, 2017) or 50% (w/w) algalbacterial granules in continuous-flow reactors (Ahmad et al, 2017). Most recently, Zhang et al (2018) and Liu et al (2018) claimed that enhanced system stability and improved nutrients removal efficiency could be achieved by using the algal-bacterial consortium in lab-scale photobioreactors.…”

Section: Introductionmentioning

confidence: 99%

Response of algal-bacterial granular system to low carbon wastewater: Focus on granular stability, nutrients removal and accumulation

Zhao

Yang

Cai

et al. 2018

Bioresource Technology

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The effect of influent chemical oxygen demand to nitrogen (COD/N) ratio on the granular stability, nutrients removal and accumulation of the algal-bacterial AGS was investigated. Two sequencing batch reactors were operated under different influent COD/N ratio, i.e., R (control, COD/N = 8) and R: (COD/N = 8, 4, 2, and 1 through stepwise decrease of COD). Results showed that the integrity coefficient of the granules in R stabilized at 0.7-5.4% during the whole operation. Significantly enhanced dissolved inorganic carbon (DIC) uptake and the faster growth of algae indicated the great potential for reduction in greenhouse gases (GHGs) emission by using the algal-bacterial AGS system. The algal-bacterial AGS biomass contained high phosphorus (P) and N contents as well as extremely high P bioavailability (up to 98%) which could be easily used for resource recovery. Loosely bound extracellular polymeric substances (LB-EPS) might be the key factor to control the deterioration of granular stability in this system.

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Enhancement of aerobic granulation and nutrient removal by an algal–bacterial consortium in a lab-scale photobioreactor

Cited by 203 publications

References 46 publications

Bibliometric Analysis of Algal-Bacterial Symbiosis in Wastewater Treatment

Bibliometric Analysis of Algal-Bacterial Symbiosis in Wastewater Treatment

Potential role of N-acetyl glucosamine in Aspergillus fumigatus-assisted Chlorella pyrenoidosa harvesting

Response of algal-bacterial granular system to low carbon wastewater: Focus on granular stability, nutrients removal and accumulation

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