Performance of two-step moving bed biofilm reactor (MBBR) process for the treatment of P-nitrophenol
Journal of Environmental Management, cilt.415, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 415
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jenvman.2026.130693
- Dergi Adı: Journal of Environmental Management
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Compendex, EMBASE, Environment Index, Geobase, Greenfile, Index Islamicus, MEDLINE, Public Affairs Index, Social Sciences Abstracts, Zoological Record, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Social Science Premium Collection (ProQuest), Engineering Source (EBSCO)
- Anahtar Kelimeler: Biofilm carriers, Biofilm reactor, Moving bed biofilm reactor, Paranitrophenol, Staged bioreactors
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
P-nitrophenol, a significant pollutant used in industry for various purposes, negatively impacts biomass growth as it is an uncoupler of oxidative phosphorylation. Therefore, properly treating PNP and rendering it environmentally harmless are crucial. While studies on its treatment using suspended biomass or certain biofilm reactors have been conducted in the literature, studies using serially-connected moving-bed biofilm reactors (MBBRs) are extremely limited. In the present study, PNP treatment up to an influent concentration of 100 mg/L was investigated using two serially-connected MBBR processes, and the effects of PNP on COD removal, nitrification performance, and biofilm density were also thoroughly investigated. The study determined that at a PNP loading of 50 mg/(L·d), PNP removal reached up to 100%; the first reactor was primarily responsible for organic matter removal, and the second reactor acted as a polishing step. PNP removal decreased as the PNP loading rate was increased from 50 to 100 mg/(L·d); in parallel with this, a decline in nitrification performance was observed, ammonium accumulation occurred, particularly in MBBR-1, and an increase in COD concentrations in the system effluent was noted. The study demonstrated effective biological removal of PNP, with negligible contribution from adsorption. The MBBR process successfully treated PNP up to a concentration of 50 mg/L (loading up to 50 mg/(L·d)) without any by-product accumulation.