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Subject: search.filters.subject.Bioremediation

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    Potential enzymatic microbes for releasing plant nutrients and siderophore production
    (2026-05-01)
    Thongsri, B.
    ;
    Song, J. J.
    ;
    Soytong, K.
    Burkholderia cepacia strain S001-08, Pseudomonas aeruginosa strain S001-11 and Pseudomonas fluorescens strain S001-15 were isolated from soil planted to Durian and selected for the properties to solubilize phosphate for plant nutrient and siderophore production for bioremediation. These selected strains were morphological and molecular phylogenic identification to confirm species level. B. cepacia strain S001-08, P. aeruginosa strain S001-11 and P. fluorescens strain S001-15 are found to be active responding as phosphorous solubilizers and producing siderophores. These active strains are being investigated to be synergistic effect and developing to be biological product as biostimulant and bioremediation. The developing biological product is promising to apply for crop production as an agricultural input for modern organic agriculture.
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    Insight review of attached microalgae growth focusing on support material packed in photobioreactor for sustainable biodiesel production and wastewater bioremediation
    (2020-12-01)
    Rosli, Siti Suhailah
    ;
    Amalina Kadir, Wan Nadiah
    ;
    Wong, Chung Yiin
    ;
    Han, Fon Yee
    ;
    Lim, Jun Wei
    The suspended microalgal cultivation systems targeting the production of lipid for biodiesel is still unable to meet the commercial and economic feasibility due to high energy and cost inputs during the harvesting process. Currently, the attached microalgal cultivation systems are known as an innovative technology to resolve the problematic aspects of suspended cultivation as the biomass can be easily separated from the culture medium with negligible energy input and no chemical need. Accordingly, this paper is focusing on reviewing various support materials utilized by researchers in growing the attached microalgal biomass in either fixed bed or fluidized bed bioreactor to ensure sustainable biomass production prior for biodiesel. An extensive review of the cultivation conditions impacting the growth of attached microalgal biomass is conducted in determining the optimized condition to enhance biomass productivity. The novelty of this paper is presented through in-depth analyses and discussions concerning the kinetic models and mechanisms study in selecting the suitable support materials for attached microalgal growth system. The incorporation of the cultivation condition parameter in predicting the growth of attached microalgae biomass via kinetic study is crucial in proffering new directions for technological developments and microalgal industry application. The ability of attached microalgal biomass in efficiently assimilate the nutrients available in the nutrient-rich wastewater for the microalgae growth is considered as an economical feasible approached. The suitable photobioreactor designs for growing the attached microalgal biomass are also discussed in detail in ensuring the sustainability of attached microalgal biomass production.
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    Comparison of bioremediation and phytoremediation in treatment of diethylene glycol from stationery industry
    (2017-01-01)
    Teamkao, Pattrarat
    ;
    Techkarnjanaruk, Somkiet
    ;
    Kullavanijaya, Pratin
    ;
    Thiravetyan, Paitip
    Diethylene glycol (DEG) was found to contaminate wastewater from the stationery industry. The wastewater, after chemical precipitation, still had high DEG and Chemical oxygen demand (COD) resulting in undischarge according to the standard wastewater policy. Bioremediation and phytoremediation were chosen to solve this problem. Comparison of bioremediation and phytoremediation revealed that adding nutrient rich microorganisms removed more DEG, but less COD than using plants grown under hydroponic conditions. However, the bioremediation system had lower potential than plant + soil conditions. The application of a plant-soil system as a constructed wetland was able to remove all DEG (1,500 mg/L) in the wastewater within 8 d. The potential of a constructed wetland system can be enhanced by the addition of microorganisms and nutrients, reducing the time of remediation from 8 to 5 d. In addition, COD reduction to 110 mg/L was reduced from 14 to 11 d, which was lower than the acceptable level (COD ≤ 120 mg/L). However, the use of microorganisms alone cannot reduce COD in contaminated wastewater to the acceptable level. Using constructed wetland with the addition of microorganisms and nutrients is an effective way to remediate DEG and COD from stationery industry wastewater.
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