Abstract：
:The anaerobic treatment of low-strength wastewater bearing pentachlorophenol (PCP) at psychro-mesophilic temperatures has been investigated in an expanded granular sludge bed reactor. Using an upward flow rate of 4 m h(-1), a complete removal of PCP, as well as COD removal and methanization efficiencies higher than 75% and 50%, respectively, were achieved. Methanogenesis and COD consumption were slightly affected by changes in loading rate, temperature (17-28°C) and inlet concentrations of urea and oils. Pentachlorophenol caused an irreversible inhibitory effect over both acetoclastic and hydrogenotrophic methanogens, being the later more resistant to the toxic effect of pentachlorophenol. An auto-inhibition phenomenon was observed at PCP concentrations higher than 10 mg L(-1), which was accurately predicted by a Haldane-like model. The inhibitory effect of PCP over the COD consumption and methane production was modelled by modified pseudo-Monod and Roediger models, respectively.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Lopez J,Monsalvo VM,Puyol D,Mohedano AF,Rodriguez JJdoi
10.1016/j.biortech.2013.04.049subject
Has Abstractpub_date
2013-07-01 00:00:00pages
349-56eissn
0960-8524issn
1873-2976pii
S0960-8524(13)00656-1journal_volume
140pub_type
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