Lee, Ju Yeon Rahman, Arifur Behrens, Juliana Brennan, Conor Ham, Baknoon Kim, Hyung Seok Nho, Chu Won Yund, Seong-Taek Azam, Hossain Kwon, Man Jae 2024-01-19T23:03:45Z 2024-01-19T23:03:45Z 2021-09-03 2018-03-25 1871-6784 https://pubs.kist.re.kr/handle/201004/121585 The potential of microbial processes for removal of major nutrients (e.g., N, P) and inorganic cations (e.g., Ca2+, Mg2+, and Fe2+) from hydroponic systems was investigated. Microbial consortium- and axenic culture-based experiments were conducted in a waste nutrient solution (WNS). A microbial consortium grown in the WNS and selected microalgae species of Paracercomonas saepenatans were inoculated in two different synthetic media (Bold's Basal Medium (BBM) and synthetic WNS) in batch systems, and the microbial growth characteristics and the rate and extent of nutrient removal were determined for each system. No toxicity or growth inhibition was observed during microbial growth in either media. Both the waste-nutrient-grown microbial consortium and Paracercomonas saepenatans can be grown effectively in BBM and WNS, and both remove most ions from both media (e.g., > 99% removal of NO3- and 41-100% removal of PO43-) within 16 days. Significant nutrient removal was observed during the growth phase of the microbial communities (4-10 days period), indicating major nutrient utilization for microbial growth as well as chemical mineral precipitation. Furthermore, MINEQL + 4.6 modeling showed higher PO43- removal in WNS during microbial growth (compared to BBM) due to precipitation of phosphate minerals ( e.g., hydroxyapatite, vivianite). The dominant microbial species in both systems were also identified. DNA sequencing showed that Vorticella (58%) and Scenedesmus (33%) in WNS and Scenedesmus (89%) in BBM were the predominant species. This study demonstrates the potential application of microbial consortium (predominantly algae and protozoan)- based treatment techniques for hydroponic systems. English ELSEVIER SCIENCE BV PHOSPHORUS REMOVAL STRUVITE CULTIVATION BIODIESEL TOMATO SYSTEM Nutrient removal from hydroponic wastewater by a microbial consortium and a culture of Paracercomonas saepenatans Article 10.1016/j.nbt.2017.11.003 1 NEW BIOTECHNOLOGY, v.41, pp.15 - 24 NEW BIOTECHNOLOGY 41 15 24 scie scopus 000425194600003 2-s2.0-85034812665 Biochemical Research Methods Biotechnology & Applied Microbiology Biochemistry & Molecular Biology Biotechnology & Applied Microbiology Article PHOSPHORUS REMOVAL STRUVITE CULTIVATION BIODIESEL TOMATO SYSTEM Algae Hydroponic system Nitrogen and phosphorous uptake Microbial community Mineral precipitation