Evaluation of laboratory-made sludge for an anaerobic biodegradability test and its use for assessment of 13 chemicals

Kawahara, Kazumi; Yakabe, Yoshikuni; Ohide, Tomohisa; Kida, Kenji

doi:10.1016/s0045-6535(99)00090-9

Cited by 12 publications

(14 citation statements)

References 9 publications

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“…On the other hand, the SOUR increased from 0.054 AE 0.012 in S-3 conditions to 0.060 AE 0.009 mmol O 2 /hÁg TKN in S-4. It seems that the 50% increment in the TCP input did not drastically affect the SMA or the SOUR (in fact, the second was essentially the same), although it is important to mention that decrease in the SMA seems to be in agreement with other works that show partial inhibition of the metabolism of methanogenic Archaea when chlorophenols were added to the culture (Guthrie et al, 1984;Horowitz et al, 1982;Kawahara et al, 1999;Robertson and Wolfe, 1970). Also, long-term aeration could have contributed to the decrease of SMA.…”

Section: S-4: 15 Vvd Aeration Rate 120 Mg/l Of Tcp and 30 Mg/l Of Phesupporting

confidence: 77%

“…Several works have suggested that biological dechlorination is not necessarily coupled to methane production (Ferguson and Jonsson, 1990;Fitzsimons et al, 1990;Madsen and Licht, 1992). On the other hand, other researchers have shown that chlorophenols such as PCP and TCP are strongly inhibitory to methanogenesis both in pure cultures of methanogenic Archaea (Guthrie et al, 1984;Robertson and Wolfe, 1970), and in anaerobic sludge and sediments (Horowitz et al, 1982;Kawahara et al, 1999).…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, metabolites of reductive dehalogenation of TCP were detected in effluent during the transient A and adsorbed onto bed bioparticles, suggesting that reductive dehalogenation actually occurred. Furthermore, there is a report of active reductive dehalogenation in systems where methanogenesis was inhibited or absent (Kawahara et al, 1999). Yet, it was also possible that after a so long operation under aeration the microbial consortium was finally able to enrich with strains with the ability to attack 2,4,6-TCP under aerobic conditions (Puhakka and Järvinen, 1992).…”

Section: S-4: 15 Vvd Aeration Rate 120 Mg/l Of Tcp and 30 Mg/l Of Phementioning

confidence: 99%

“…As we discussed above, dechlorination is not necessarily associated to methanogenesis (Ferguson and Jonsson, 1990;Fitzsimons et al, 1990;Madsen and Licht, 1992). On the other hand, chlorophenols such as TCP have been reported to be inhibitors to methanogenesis (Horowitz et al, 1982, Kawahara et al, 1999. Furthermore, previous studies that demonstrated resistance of methanogenic Archaea to oxygen lasted less than 300 days (Estrada-Vázquez et al, 2001, 2003Kato et al, 1993;Shrout, 1998, 2000).…”

Section: S-4: 15 Vvd Aeration Rate 120 Mg/l Of Tcp and 30 Mg/l Of Phementioning

confidence: 99%

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Impact of long-term partial aeration on the removal of 2,4,6-trichlorophenol in an initially methanogenic fluidized bed bioreactor

Garibay-Orijel

Hoyo‐Vadillo

Ponce-Noyola

et al. 2006

Biotechnol. Bioeng.

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A fluidized bed bioreactor (FBBR) was operated for more than 1000 days under two regimes, Methanogenic (M) and Methanogenic-Aerobic (M-A), to remove 2,4,6-trichlorophenol (TCP) and phenol (Phe) from a synthetic wastewater, containing different amounts of TCP and Phe, using different aeration flow-rates (0, 2.13, and 1.06 NL O(2)/L.day). M conditions (80:20 mg/L of TCP:Phe, 0 NL O(2)/L.day) showed similar TCP and Phe removal (>95%). Nevertheless accumulation of 4-chlorophenol (4CP) up to 16 mg/L and Phe up to 4 mg/L was observed, while in M-A conditions (80:20 mg/L of TCP:Phe, 2.13 NL O(2)/L.day) TCP and Phe removal achieved 99.9(+)% and after 70 days no accumulation of intermediates were detected. The increase of TCP and Phe in the influent under M-A conditions from 80:20 to 120:30 mg/L of TCP:Phe did not negatively affect the removal of TCP, intermediates and Phe; in fact, they were similar to those in previous M-A conditions. The decrease in the oxygen flow rate from 2.13 to 1.06 NL O(2)/L.day had no negative effect on pollutant removals, which were as high as in previous two M-A conditions. The specific methanogenic activity of bioparticles of the fluidized bed decreased with long-term partial aeration, starting from 1.097 mmol CH(4)/h.g(TKN) in the M regime (day 60) to <0.02 mmolCH(4)/h.g(TKN) at day 1050, suggesting aerobic regime in the bioreactor rather than an M-A regime. In conclusion, complete removal of TCP and less chlorinated intermediates could be achieved in an initially methanogenic FBBR under conditions of partial aeration, although long-term operation seemed to negatively affect the methanogenic activity of biomass. It is also likely that after extended aeration the microbial community was finally enriched with strains with the ability to attack 2,4,6-TCP under aerobic conditions. This report represents the first evidence of a long exposure to oxygen of an anaerobic microbial consortium that efficiently remove TCP.

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Section: S-4: 15 Vvd Aeration Rate 120 Mg/l Of Tcp and 30 Mg/l Of Phesupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: S-4: 15 Vvd Aeration Rate 120 Mg/l Of Tcp and 30 Mg/l Of Phementioning

confidence: 99%

Section: S-4: 15 Vvd Aeration Rate 120 Mg/l Of Tcp and 30 Mg/l Of Phementioning

confidence: 99%

See 2 more Smart Citations

Impact of long-term partial aeration on the removal of 2,4,6-trichlorophenol in an initially methanogenic fluidized bed bioreactor

Garibay-Orijel

Hoyo‐Vadillo

Ponce-Noyola

et al. 2006

Biotechnol. Bioeng.

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show abstract

“…Batch reactor setup was arranged as described earlier which was used for methanogenic activity [21] with 1.5 l batch reactor. Initially SO 2 from the cylinder was bubbled through the glass reactor for 5 min containing 1050 ml of wastewater.…”

Section: Anaerobic Batch Reactormentioning

confidence: 99%

Microbial conversion of sulfur dioxide in flue gas to sulfide using bulk drug industry wastewater as an organic source by mixed cultures of sulfate reducing bacteria

Rao

Ravichandra

Joseph

et al. 2007

Journal of Hazardous Materials

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2,4,6‐Trichlorophenol and phenol removal in methanogenic and partially‐aerated methanogenic conditions in a fluidized bed bioreactor

Garibay-Orijel

Rı́os-Leal

García‐Mena

et al. 2005

J of Chemical Tech & Biotech

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Evaluation of laboratory-made sludge for an anaerobic biodegradability test and its use for assessment of 13 chemicals

Cited by 12 publications

References 9 publications

Impact of long-term partial aeration on the removal of 2,4,6-trichlorophenol in an initially methanogenic fluidized bed bioreactor

Impact of long-term partial aeration on the removal of 2,4,6-trichlorophenol in an initially methanogenic fluidized bed bioreactor

Microbial conversion of sulfur dioxide in flue gas to sulfide using bulk drug industry wastewater as an organic source by mixed cultures of sulfate reducing bacteria

2,4,6‐Trichlorophenol and phenol removal in methanogenic and partially‐aerated methanogenic conditions in a fluidized bed bioreactor

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