A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Thermophilic anaerobic digestion of industrial orange waste (2006)

Kaparaju, P., & Rintala, J. (2006). Thermophilic anaerobic digestion of industrial orange waste. Environmental Technology, 27(6), 623-633. https://doi.org/10.1080/09593332708618676

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Kaparaju, Prasad; Rintala, Jukka

Lehti tai sarja: Environmental Technology

ISSN: 0959-3330

Julkaisuvuosi: 2006

Volyymi: 27

Lehden numero: 6

Artikkelin sivunumerot: 623-633

Kustantaja: SELPER LTD, PUBLICATIONS DIV

Kustannuspaikka: ENGLAND

Julkaisun kieli: englanti

DOI: https://doi.org/10.1080/09593332708618676

Pysyvä verkko-osoite: http://apps.isiknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=Y1@bb@9Kbm9C4jHd8cL&page=2&doc=12

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus: 

Tiivistelmä

Thermophilic anaerobic digestion of industrial orange waste (pulp and peel) with subsequent aerobic post-treatment of the digestate was evaluated. Methane production potential was first determined in batch assays and the effects of operational parameters such as hydraulic retention times (HRT) and organic loading rates (OLR) on process performance were studied through semi-continuous digestion. In batch assays, methane production potential of about 0.49 m3 kg−1 volatile solids (VS)added waste was achieved. In semi-continuous digestion, loading at 2.8 kgVS m−3 d−1 (2.9 kg total solids (TS) m−3 d−1) and HRT of 26 d produced specific methane yields of 0.6 m3 kg−1 VSadded waste (0.63 m3 kg−1 TSadded waste). Operating at a higher OLR of 4.2 kgVS m−3 d−1 (4.4 kg TS m−3 d−1) and 40 d HRT produced 0.5 m3 of methane kg−1 VSadded waste (0.63–0.52 m3 kg−1 TSadded waste). Up to 70% of TS of industrial orange waste (11.6% TS) was methanised. Further increase in OLR to 5.6 kgVS m−3 d−1 (5.9 kgTS m−3 d−1; HRT of 20 d) resulted in an unstable and non-functional digester process shown directly through complete cessation of methanogenesis, drop in methane content, reduced pH and increase in volatile fatty acid (VFA) concentrations, especially acetate and soluble chemical oxygen demand. A pH adjustment (from an initial 3.2 to ca. 8) for the low pH orange waste was necessary and was found to be a crucial factor for stable digester operation as the process showed a tendency to be inhibited due to accumulation of VFAs and decrease in digester pH. Aerobic post-treatment of digestate resulted in removal of ammonia and VFAs.

YSO-asiasanat: biojätteet; jätteiden hyötykäyttö; jätteiden käsittely; mädätys; jälkikäsittely; metaani

Vapaat asiasanat: aerobic-post treatment; CSTR; industrial orange waste; thermophilic anaerobic digestion

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Alustava JUFO-taso: Not rated