Removal of NH3 and H2S from odor causing tannery emissions using biological filters: Impact of operational strategy on the performance of a pilot-scale bio-filter. Issue 6 (30th June 2021)

• Record Type: Journal Article
• Authors: Gandu, Bharath; Palanivel, Saravanan; Juntupally, Sudharshan; Arelli, Vijayalakshmi; Begum, Sameena; Anupoju, Gangagni Rao
• Is Part Of: Journal of environmental science and health. Volume 56:Issue 6(2021)
• Page Start: 625
• Page End: 634
• Publication Date: 2021-06-30
• Subjects: Biofilter -- full-scale -- H2S -- microbial diversity -- NH3 -- odor -- pilot-scale; Environmental engineering -- Periodicals; Environmental sciences -- Periodicals; Ecology -- periodicals; Hazardous Substances -- periodicals; 628
• DOI: 10.1080/10934529.2021.1903283
• Languages: English
• ISSNs: 1093-4529

Abstract

Abstract: Deodorization of gases emitted from Tanneries using eco-friendly and cost-effective approaches is necessary for the safe disposal of industrial emissions. There is limited research available on the treatment of odorous gases emitted from tanneries using bio-filter. In this endeavor, pilot-scale studies were performed in a 2.7 m 3 bio-filter with synthetic gas mixture containing hydrogen sulfide (H2 S) and ammonia (NH3 ) as input gas to study the impact of bedding material for the removal of H2 S and NH3 using bio-filter and identification of various design parameters for scale-up. The pilot-scale studies showed that the removal efficacy of both NH3 and H2 S was about 90–99% at an empty bed residence time of 55 seconds at an inlet concentration (NH3 and H2 S) of 200 to 210 ppmV and microbial count enhanced from 3.5 × 10 3 to 8.9 × 10 9 in 210 days. The microbial biodiversity analysis revealed the dominance of proteobacteria as as well as Firmicutes and Acinetobacter . A full-scale bio-filter (13.75 m 3 ) was designed, installed, and commissioned in a tannery and observed that the removal efficiency of >99% since last three years.