Anaerobic Fixed-Bed Reactors for Treatment of Synthetic Wastewater and Estuarine-Like Water Containing Pentachlorophenol

作者：Rissato Zamariolli Damianovic Marcia Helena; Saia Flavia Talarico; Baraldi Elizabeth; Brucha Gunther; Vazoller Rosana Filomena; Foresti Eugenio

来源：Environmental Engineering Science, 2013, 30(2): 61-66.

DOI：10.1089/ees.2012.0104

• fixed bed reactor
• horizontal flow
• inocula
• pentachlorophenol
• start-up
• wastewater treatment

Pentachlorophenol (PCP) is an important hazardous compound present in industrial wastewaters and in the leachate of contaminated sites. This article reports on the application of horizontal-flow anaerobic immobilized biomass (HAIB) reactors (R1, R2, and R3) for PCP and chemical oxygen demand (COD) removal from contaminated waters. The reactors' feed consisted of synthetic wastewaters containing different cosubstrates, inoculated with different types of sludge. A mixture of glucose, organic acids, and alcohols fed R1 and R2, and estuarine-like water supplemented with glucose and formate fed R3. R1 and R2 inocula consisted of a mixture of sludge from up flow anaerobic sludge blanket reactors treating sewage and paper-recycling wastewater. R3 received inoculum derived from estuarine sediment contaminated with chlorophenols. Different start-up strategies were applied. COD removal efficiencies were 99% (R1), 95% (R2), and 80% (R3). Independent of the start-up strategy applied, efficient PCP (0.2-13.0 mg/L) removal occurred in the three HAIB reactors. Adsorption of PCP onto polyurethane foam matrix bioparticles was negligible. Tri- and dichlorophenol were observed in all reactors, suggesting that PCP removal occurred by reductive dechlorination. PCP was effectively removed by the reactor but high concentrations of other chlorinated phenols were still present in the effluent of the reactor.

• 出版日期2013-2