Microbial community in a pilot-scale biotrickling filter with cell-immobilized biochar beads and its performance in treating toluene-contaminated waste gases

Shu Hui Liu, Hsin Hui Lin, Chi-Yung Lai, Chi Wen Lin, Shih Hsien Chang, Jyh Tyng Yau

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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 m3 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.

Original languageEnglish
Article number104743
JournalInternational Biodeterioration and Biodegradation
Volume144
DOIs
Publication statusPublished - 2019 Oct 1

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Biomaterials
  • Waste Management and Disposal

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