Feasibility of Marine Microalgae Immobilization in Alginate Bead for Marine Water Treatment: Bead Stability, Cell Growth, and Ammonia Removal

Soo, Chen-Lin; Chen, Cheng-Ann; Bojo, Othman; Hii, Yii Siang

doi:10.1155/2017/6951212

Cited by 27 publications

(13 citation statements)

References 23 publications

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“…These values were well correlated with the cell concentration profile in Figure 1. Similar trend was reported by several studies on higher ammonium removal for alginate-immobilized microalgae as compared to the free suspended cells (Banerjee et al, 2019;Soo et al, 2017).…”

Section: Nutrients Removalsupporting

confidence: 90%

Immobilized Microalgae using Alginate for Wastewater Treatment

Halim¹,

Haron²

2021

JST

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Organic and inorganic substances are released into the environment because of domestic, agricultural, and industrial activities which contribute to the pollution of water bodies. Removal of these substances from wastewater using conventional treatment involves high energy cost for mechanical aeration to provide oxygen for aerobic digestion system. During this process, the aerobic bacteria rapidly consume the organic matter and convert it into single cell proteins, water, and carbon dioxide. Alternatively, this biological treatment step can be accomplished by growing microalgae in the wastewater. Chlorella vulgaris immobilized in calcium alginate was used to study the removal efficiency of main nutrients in wastewater such as ammonium and phosphate that act as an important factor in microalgae growth. The immobilized cells demonstrated higher percentage of ammonium and phosphate removal of 83% and 79% respectively, compared to free-suspended cells (76% and 56%). COD removal recorded was 89% and 83% for immobilized cells and free-suspended cells, respectively. The kinetics parameters of nutrients removal for immobilized C. vulgaris in synthetic wastewater were also determined. The specific ammonium removal rates (RA) and phosphate removal rates (RP) for Chlorella vulgaris in synthetic wastewater were 8.3 mg.L-1day-1 and 7.9 mg.L-1day-1, respectively. On the other hand, the kinetic coefficient for each nutrient removal determined were kA = 0.0462 L.mg-1 day-1 NH4 and kP = 0.0352 L.mg-1 day-1 PO43-. This study proves the application of immobilized microalgae cells is advantageous to the wastewater treatment efficiency. Furthermore, optimization on the immobilization process can be conducted to further improve the nutrients removal rates which potentially can be applied in the large-scale wastewater treatment process.

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Section: Nutrients Removalsupporting

confidence: 90%

Immobilized Microalgae using Alginate for Wastewater Treatment

Halim¹,

Haron²

2021

JST

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“…The transparency of small calcium-alginate beads is enough to permit the growth of immobilized microalgae [40]. Additionally, it is an easy, cheap and feasible technique to be used in research laboratories [8,[27][28][29]41]. Removal efficiency of copper, iron, zinc, and lead from the contaminated effluent by the immobilized cultures of A. variabilis and T. ceytonica either individual or as a mixed culture in the continuous treatment recorded higher RE(s)% compared with the treatment with the free cells and differed according to the flow rate used (50 and 100 ml/h) as well as the type of heavy metal, incubation period, and the tested species.…”

Section: Discussionmentioning

confidence: 99%

Efficiency of immobilized cyanobacteria in heavy metals removal from industrial effluents

El-Bestawy¹

2019

Desalination and Water Treatment

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Anabaena variabilis and Tolypthrix ceytonica were selected for bioremediation of heavy metals-contaminated industrial effluents based on their high efficiency as metals accumulators. Sodium alginate immobilized individual or mixed cell cultures were examined to decontaminate Plastic and electrical industrial effluents in continuous mode (at 50 and 100 ml/h flow rates) for 6 h. Removal efficiency was a function of heavy metal type, concentration, microbial species and proportionally increased with exposure time. The maximum achieved removals recorded 94.45% for Fe 2+ (A. variabilis at 50 ml/h), Zn 2+ (98.98% by A. variabilis; 98.63% by A. variabilis and T. ceytonica mixture and 98.61% by T. ceytonica at 100 ml/h), 94.22% for Pb 2+ (A. variabilis and T. ceytonica mixture at 100 ml/h) as well as 93.33% and 91.33% for Cu 2+ by A. variabilis and T. ceytonica at 50 and 100 ml/h flow rates, respectively. Excellent selective metals bioremoval abilities were detected by the selected cyanobacterial species. Their manipulation in the proposed biotechnology provides an economic and excellent tool for remediation of industrial effluents and protection of the received environments. Moreover, treated wastewater may be reused in any purpose such as aqua-culturing or irrigation of agricultural edible and non-edible crops.

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“…Thus, alginate beads of type I contained microorganisms isolated from compost fixed within the internal bead structure (entrapped) and microalgae fixed on the bead surface (attached), while the alginate beads of type II contained both compost-based microorganisms and microalgae entrapped inside the bead structure. Various particular aspects related to the immobilization of the microalgae biomass using alginate are available elsewhere [6,[13][14][15].…”

Section: Immobilisation Of the Microorganismsmentioning

confidence: 99%

Moving forward sustainable solutions for VOCs biotrickling filtration through co-immobilised microorganisms

Soreanu¹,

Diaconu²,

Maier³

et al. 2021

RJEEC

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This study is moving forward with some available options for upgrading the biotrickling filters (BTFs) treating volatile organic compounds (VOCs) in air, in the light of lowering their greenhouse gas(GHG) emissions. One of such options refers to the addition of the microalgae component to the biological matrix involved in such systems, by (co)immobilization, for the capture of the carbon dioxide issued from the VOCs biodegradation and potentially contributing to the overall VOCs removal performance. Particularly, alginate beads with (co) immobilized microorganisms (microorganisms isolated from commercial compost and microalgae Arthrospira platensis PCC 8005) are for the first time tested for this purpose, as follows: beads with entrapped compost-based microorganisms and attached microalgae (BTF-I); beads with an entrapped mixture of microalgae and compost-based microorganisms (BTF-II). Although both options provided promising performances in treating air contaminated with ethanol (as a model VOC in this study), the last option exhibited lower CO2 emissions and higher packing bed durability, being more prone to further development and implementation.

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Feasibility of Marine Microalgae Immobilization in Alginate Bead for Marine Water Treatment: Bead Stability, Cell Growth, and Ammonia Removal

Cited by 27 publications

References 23 publications

Immobilized Microalgae using Alginate for Wastewater Treatment

Immobilized Microalgae using Alginate for Wastewater Treatment

Efficiency of immobilized cyanobacteria in heavy metals removal from industrial effluents

Moving forward sustainable solutions for VOCs biotrickling filtration through co-immobilised microorganisms

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