scholarly journals Utilization of sugarcane factories’ wastes as inexpensive source of nutrients and CO2 for microalgal biomass production: process coupling and potential evaluation

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Deribew Tefera Zewdie ◽  
Abubeker Yimam Ali
Keyword(s):  
Biomass Production ◽  
Algal Biomass ◽  
Wastewater Treatment Plants ◽  
Algal Growth ◽  
Oxygen Demand ◽  
Microalgal Biomass ◽  
Industrial Plants ◽  
Coupled Process ◽  
Energy Balance Approach ◽  
Spread Sheet

AbstractOne approach for the viable production of algal biomass is to couple its production with wastewater treatment plants, power and/or industrial plants. This is intended towards the utilization of the nutrients and the CO2 in the wastewater and in the flue gases of the industry respectively by the microalgae during their growth. In the present study microalgal biomass production was conceptually coupled with a sugar factory. The potential of the wastewater and the flue gas of the factory to support the growth of the microalgae was evaluated. Likewise the possible reduction of pollution by the microalgae was studied. The outputs from the coupled process were determined using the material and energy balance approach with a spread sheet. The cultivation model shows that 12 mg of total nitrogen (TN) and 7.4 mg of total phosphorus (TP) per liter of wastewater could be transferred to the algal growth ponds. It was found that there is a nitrogen deficit in the wastewater. With the supply of makeup nutrient, 120.5 tons/year microalgal biomass could be produced from the coupled process. Application of the assumptions resulted in the reduction of chemical oxygen demand (COD) (mg O2/L) from 2200 to 447, biological oxygen demand (BOD5) (mg O2/L) from 1200 to 207, TN (mg/L) from 15 to 0.6 and, TP (mg/L) from 10 to 1.5 in the wastewater. Integration of the sugarcane processing factories with algal biomass production is important for both biomass production and bioremediation.

scholarly journals Application of Two Indigenous Strains of Microalgal Chlorella sorokiniana in Cassava Biogas Effluent Focusing on Growth Rate, Removal Kinetics, and Harvestability

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2314
Author(s):  
Mohamad Padri ◽  
Nittaya Boontian ◽  
Neung Teaumroong ◽  
Pongdet Piromyou ◽  
Chatlada Piasai
Keyword(s):  
Nutrient Removal ◽  
Algal Biomass ◽  
Batch Reactor ◽  
Inorganic Nitrogen ◽  
Carbon Sources ◽  
Oxygen Demand ◽  
Biomass Accumulation ◽  
Chlorella Sorokiniana ◽  
Microalgal Biomass ◽  
Process Adjustment

Microalgae cultivation in wastewater is an emerging approach to remove its contaminants and generate microalgal biomass. This study aimed to screen and isolate potential strains in a cassava biogas effluent wastewater (CBEW) treatment system and produce algal biomass. Chlorella sorokiniana strains P21 and WB1DG were isolated from CBEW and found to grow by utilizing various carbon sources. Experiments conducted in a batch reactor using an unsterilized substrate were done to evaluate the nutrient removal and growth of isolated strains from CBEW. The results showed that C. sorokiniana P21 and WB1DG could achieve biomass accumulation of more than 2564 and 1301 mg L−1, respectively. The removal efficiencies of chemical oxygen demand (COD), total phosphorous (TP), and total inorganic nitrogen (TIN) were found up to be 63.42, 91.68, and 70.66%, respectively, in a WB1DG culture and 73.78, 92.11, and 67.33%, respectively, in a P21 culture. Harvestability of the P21 strain was examined using several coagulant–flocculants. FeCl3 was found to remove more than 90% of the cells. Nutrient removal and growth rates resulting from these indigenous strains with application of untreated CBEW support the possibility of this strain being a promising candidate to couple a CBEW treatment and algal biomass generation with minimal process adjustment.

scholarly journals A sequential membrane bioreactor followed by a membrane microalgal reactor for nutrient removal and algal biomass production

2020 ◽  
Vol 6 (1) ◽  
pp. 189-196 ◽  
Author(s):  
Luong N. Nguyen ◽  
Minh V. Truong ◽  
Anh Q. Nguyen ◽  
Md Abu Hasan Johir ◽  
Audrey S. Commault ◽  
...  
Keyword(s):  
Biomass Production ◽  
Nutrient Removal ◽  
Algal Biomass ◽  
Membrane Bioreactor ◽  
Hybrid Process ◽  
Microalgal Biomass ◽  
Single Compartment

A hybrid process combining a single compartment aerobic membrane bioreactor (MBR) and a membrane microalgal reactor (MMR) was evaluated for nutrient removal and microalgal biomass production.

scholarly journals A novel nanoemulsion based microalgal growth medium for enhanced biomass production

2020 ◽  
Author(s):  
Harshita Nigam ◽  
Anushree Malik ◽  
Vikram Singh
Keyword(s):  
Biomass Production ◽  
Biochemical Characterization ◽  
Silicone Oil ◽  
Algal Growth ◽  
Morphological Characteristics ◽  
Biomass Productivity ◽  
Growth Media ◽  
Freshwater Microalgae ◽  
Microalgal Biomass ◽  
And Control

Abstract Background: Microalgae are well-established feedstocks for applications ranging from biofuels to valuable pigments and therapeutic proteins. However, the low biomass productivity using commercially available growth mediums is a roadblock for its mass production. This work describes a strategy to boost algal biomass productivity by using an effective CO2 supplement.Results: In the present study, a novel nanoemulsion-based media has been tested for the growth of freshwater microalgae strain Chlorella pyrenoidosa. Two different nanoemulsion-based media were developed using 1% silicone oil nanoemulsion (1% SE) and 1% paraffin oil nanoemulsion (1% PE) supplemented in Blue-green 11 media (BG11). After 12 days of cultivation, biomass yield was found highest in 1% PE followed by 1% SE and control i.e, 3.20, 2.75, and 1.03 g L-1, respectively. The chlorophyll-a synthesis was improved by 76% in 1% SE and 53% in 1% PE compared with control. The respective microalgal cell numbers for 1% PE, 1% SE and control measured using the cell counter were 3.00 × 106, 2.40 × 106, and 1.34 × 106 cells mL-1. The effective CO2 absorption tendency of the emulsion was highlighted as the key mechanism for enhanced algal growth and biomass production. On the biochemical characterization of the produced biomass, it was found that the nanoemulsion cultivated C. pyrenoidosa had increased lipid (1% PE =26.80%, 1% SE =23.60%) and carbohydrates (1% PE =17.20%, 1% SE =18.90%) content compared to the control (lipid =18.05%, carbohydrates =13.60%).Conclusions: This study describes a novel nanoemulsion which potentially acts as an effective CO2 supplement for microalgal growth media thereby increasing the growth of microalgal cells. Further, nanoemulsions cultivated microalgal biomass depict an increase in lipid and carbohydrate content. The approach provides high microalgal biomass productivity without altering morphological characteristics like cell shape and size as revealed by Field Emission Scanning Electron Microscope (FESEM) images.

scholarly journals A novel nanoemulsion-based microalgal growth medium for enhanced biomass production

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Harshita Nigam ◽  
Anushree Malik ◽  
Vikram Singh
Keyword(s):  
Biomass Production ◽  
Biochemical Characterization ◽  
Silicone Oil ◽  
Algal Growth ◽  
Morphological Characteristics ◽  
Biomass Productivity ◽  
Growth Media ◽  
Freshwater Microalgae ◽  
Microalgal Biomass ◽  
And Control

Abstract Background Microalgae are well-established feedstocks for applications ranging from biofuels to valuable pigments and therapeutic proteins. However, the low biomass productivity using commercially available growth mediums is a roadblock for its mass production. This work describes a strategy to boost algal biomass productivity by using an effective CO2 supplement. Results In the present study, a novel nanoemulsion-based media has been tested for the growth of freshwater microalgae strain Chlorella pyrenoidosa. Two different nanoemulsion-based media were developed using 1% silicone oil nanoemulsion (1% SE) and 1% paraffin oil nanoemulsion (1% PE) supplemented in Blue-green 11 media (BG11). After 12 days of cultivation, biomass yield was found highest in 1% PE followed by 1% SE and control, i.e., 3.20, 2.75, and 1.03 g L−1, respectively. The chlorophyll-a synthesis was improved by 76% in 1% SE and 53% in 1% PE compared with control. The respective microalgal cell numbers for 1% PE, 1% SE and control measured using the cell counter were 3.00 × 106, 2.40 × 106, and 1.34 × 106 cells mL−1. The effective CO2 absorption tendency of the emulsion was highlighted as the key mechanism for enhanced algal growth and biomass production. On the biochemical characterization of the produced biomass, it was found that the nanoemulsion-cultivated C. pyrenoidosa had increased lipid (1% PE = 26.80%, 1% SE = 23.60%) and carbohydrates (1% PE = 17.20%, 1% SE = 18.90%) content compared to the control (lipid = 18.05%, carbohydrates = 13.60%). Conclusions This study describes a novel nanoemulsion which potentially acts as an effective CO2 supplement for microalgal growth media thereby increasing the growth of microalgal cells. Further, nanoemulsion-cultivated microalgal biomass depicts an increase in lipid and carbohydrate content. The approach provides high microalgal biomass productivity without altering morphological characteristics like cell shape and size as revealed by field emission scanning electron microscope (FESEM) images. Graphical abstract

scholarly journals Microalgae Cultivation Technologies as an Opportunity for Bioenergetic System Development—Advantages and Limitations

2020 ◽  
Vol 12 (23) ◽  
pp. 9980
Author(s):  
Marcin Dębowski ◽  
Marcin Zieliński ◽  
Joanna Kazimierowicz ◽  
Natalia Kujawska ◽  
Szymon Talbierz
Keyword(s):  
Biomass Production ◽  
Large Scale ◽  
Fossil Fuels ◽  
Wastewater Treatment Plants ◽  
System Development ◽  
Pilot Scale ◽  
Biofuel Production ◽  
Hazardous Air Pollutants ◽  
Microalgal Biomass ◽  
Production Technologies

Microalgal biomass is currently considered as a sustainable and renewable feedstock for biofuel production (biohydrogen, biomethane, biodiesel) characterized by lower emissions of hazardous air pollutants than fossil fuels. Photobioreactors for microalgae growth can be exploited using many industrial and domestic wastes. It allows locating the commercial microalgal systems in areas that cannot be employed for agricultural purposes, i.e., near heating or wastewater treatment plants and other industrial facilities producing carbon dioxide and organic and nutrient compounds. Despite their high potential, the large-scale algal biomass production technologies are not popular because the systems for biomass production, separation, drainage, and conversion into energy carriers are difficult to explicitly assess and balance, considering the ecological and economical concerns. Most of the studies presented in the literature have been carried out on a small, laboratory scale. This significantly limits the possibility of obtaining reliable data for a comprehensive assessment of the efficiency of such solutions. Therefore, there is a need to verify the results in pilot-scale and the full technical-scale studies. This study summarizes the strengths and weaknesses of microalgal biomass production technologies for bioenergetic applications.

Enhanced Growth Performance Of Microalgal Biomass For Lipid Production

2020 ◽  
Author(s):  
Ysa Francine Perez ◽  
Christine Ann Sta Maria ◽  
Rence Marrion Mangulabnan Pineda ◽  
John Dave Aquino ◽  
Jerwin Undan
Keyword(s):  
Biomass Production ◽  
Lipid Production ◽  
Scenedesmus Obliquus ◽  
Carbon Dioxide Emission ◽  
Algal Growth ◽  
Growth Conditions ◽  
Oil Reservoir ◽  
Microalgal Biomass ◽  
Renewable Fuel ◽  
Reduce Carbon Dioxide

Abstract The supply of petroleum-based fuel decreases, and the need to produce viable renewable fuel increases. In the wake of the uprising global energy crisis, microalgae serve as a promising feedstock for oil production. The researcher gained interest due to its hitting-two birds-with-one-stone approach as a potential solution for the continuously depleting source of oil reservoir worldwide and to reduce carbon dioxide emission into the atmosphere using microalgae. The potential of the strains (Chlorella vulgaris, Monoraphidium sp., Scenedesmus obliquus, Desmodesmus denticulatus, and Chlorophyta sp.) in the production of lipid was assessed in this study. Furthermore, optimization of the growth conditions of each microalgae strain were identified to enhance biomass production and lipid accumulation. Two microalgae strains namely Monoraphidium sp. and Desmodesmus denticulatus exhibited higher lipid productivity compared to other microalgae strains on biomass and lipid content. The following optimized growth conditions that support algal growth are as follows: pH 5, 0.5 moles in salinity level, outside temperature, and sunlight. The production of lipids is dependent on the microalgae strain, including the optimum condition that supports its biomass production.

Modelling of oxygen-evolving-complex ionization dynamics for energy-efficient production of microalgal biomass, pigment and lipid with carbon capture: an engineering vision for a biorefinery

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51941-51956 ◽  
Author(s):  
Ganeshan Subramanian ◽  
Ramalingam Dineshkumar ◽  
Ramkrishna Sen
Keyword(s):  
Carbon Dioxide ◽  
Energy Efficient ◽  
Carbon Capture ◽  
Algal Biomass ◽  
Carbon Dioxide Capture ◽  
Algal Growth ◽  
Efficient Production ◽  
Oxygen Evolving Complex ◽  
Microalgal Biomass ◽  
Oxygen Evolving

Development of an algal growth kinetics model, incorporating oxygen-evolving-complex ionization dynamics, for sustainable production of algal biomass, lipid, and chlorophyll (with associated carbon dioxide capture) in an algal biorefinery.

The Characteristics of Community Wastewater Biological Treatment Processes in Taiwan

1986 ◽  
Vol 18 (7-8) ◽  
pp. 289-296
Author(s):  
C. F. Ouyang ◽  
T. J. Wan
Keyword(s):  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Field Investigation ◽  
Oxidation Ditch ◽  
Trickling Filter ◽  
Rotating Biological Contactor ◽  
Treatment Processes ◽  
Treatment Characteristics ◽  
Sludge Thickening

This study investigated and compared the treatment characteristics of three different kinds of biological wastewater treatment plants (including rotating biological contactor, trickling filter and oxidation ditch) which are currently operated in Taiwan. The field investigation of this study concentrated on the following items: the performance of biological oxygen demand (BOD) and suspended solids (SS) removal; the sludge yield rate of BOD removal; the settleability of sludge solids; the properties of sludge thickening; the power consumption and land area requirement per unit volume of wastewater. Finally, based on the results of the field investigation, a comparison of the treatment characteristics of the three different biological treatment processes was evaluated.

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