Rapid acclimation of methanogenic granular sludge into denitrifying sulfide removal granules.

Abstract:

:Rapid formation of denitrifying sulfide removal granules is of practical interest to start up an expanded granular sludge bed reactor for wastewater treatment. This study demonstrates that methanogenic granules can be easily acclimated into DSR granules in one day, removing all 1.30 kg m(-3) d(-1) sulfide and converting >90% of 0.56 kg-Nm(-3)d(-1) nitrate into di-nitrogen gas. Under high loadings, reactor performance, however, declined. Under high loading rates, sulfide first inhibited the heterotrophic denitrifier (Caldithrix sp.), thereby accumulating nitrite in the system; the autotrophic denitrifier (Pseudomonas sp. C23) was then inhibited by accumulated nitrite, leading to breakdown of the entire DSR process.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Zhou X,Chen C,Wang A,Liu LH,Ho KL,Ren N,Lee DJ

doi

10.1016/j.biortech.2011.01.049

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

5244-7

issue

8

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(11)00118-0

journal_volume

102

pub_type

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