Microbial community in a pilot-scale biotrickling filter with cell-immobilized biochar beads and its performance in treating toluene-contaminated waste gases
| Autor: | Shu-Hui Liu, Chi-Yung Lai, Chi Wen Lin, Shih-Hsien Chang, Hsin-Hui Lin, Jyh Tyng Yau |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Pollutant 030106 microbiology Substrate (chemistry) Exhaust gas 010501 environmental sciences Biodegradation Contamination Pulp and paper industry 01 natural sciences Microbiology Toluene Filter (aquarium) Biomaterials 03 medical and health sciences chemistry.chemical_compound chemistry Biochar Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | International Biodeterioration & Biodegradation. 144:104743 |
| ISSN: | 0964-8305 |
| DOI: | 10.1016/j.ibiod.2019.104743 |
| Popis: | Cell-immobilized bamboo-biochar beads (cell-biochar beads) that were made of an environmentally friendly material were used as packing material in biotrickling filters (BTFs). Cell-biochar beads play the double role of an adsorber of pollutants and a carrier for the growth of attached bacteria, increasing the efficiency of pollutant removal by BTFs. A toluene removal rate of over 99% was achieved. The best organic loading rate (OLR) of BTF on toluene was 46.2 g m −3 h −1 and its elimination capacity (EC) was 34.9 g m −3 h −1 at an exhaust gas flow rate of 0.015 m 3 min −1 and an empty bed residence time (EBRT) of 99 s. According to a microbial community analysis, when the cell-biochar beads were immobilized with a targeted pollutant-degrader under various operating conditions, they were dominated by microbes, revealing that the beads had mitigated the inhibition effect of substrate on biodegradation. Therefore, when cell-biochar beads are used as a packing material in a BTF, the exhaust gas can be effectively treated; the impact of the organic load can be effectively buffered and the EC can be improved by scaling up. |
| Databáze: | OpenAIRE |
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