AI Article Synopsis
- This study introduces a new composite material, TMCC/PAA/SA@Fe(TPSA), designed for immobilizing bacteria in bioreactor systems to improve the removal of nitrate, Ni(II), and phosphorus.
- Under optimal conditions (8-hour hydraulic retention time and pH 7.0), nitrate removal achieved about 100%, while phosphorus removal reached 61.7%, and nearly 100% Ni(II) removal was noted at a concentration of 1 mg/L.
- The research also examined the structure of the bacterial pellets and found that while microbial activity was generally higher in the treatment reactor, high levels of Ni(II) could negatively impact bacterial function.
Article Abstract
This study presents the novel composite material TMCC/PAA/SA@Fe(TPSA), a bacteria immobilized carrier for use in bioreactor systems to enhance the simultaneous removal efficiency of nitrate, Ni(II) and phosphorus. The influence of various operational factors were evaluated on the performance of nitrate, phosphorus and Ni(II) removal. Results demonstrate that under optimum conditions of an hydraulic retention time (HRT) of 8 h and pH 7.0, nitrate and phosphorus removal reached nearly 100% and 61.7%, respectively. When the initial Ni(II) concentration was 1 mg/L, approximately 100% Ni(II) removal efficiency was achieved. Furthermore, the morphology and components of the TPSA immobilized bacterial pellets were analyzed to investigate the mechanism of simultaneous nitrate, Ni(II) and phosphorus removal. Microbial metabolism was more active in the experimental reactor compared with control, although high concentrations of Ni(II) could inhibit bacterial activity.
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| http://dx.doi.org/10.1016/j.biortech.2020.123081 | DOI Listing |
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