Effect of nitrite from nitritation on biological phosphorus removal in a sequencing batch reactor treating domestic wastewater.

Abstract:

:Although nitrite effect on enhanced biological phosphorus removal (EBPR) has been previously studied, very limited research has been undertaken about the effect of nitrite accumulation caused by nitritation on EBPR. This paper focused on nitrite effect from nitritation on EBPR in a sequencing batch reactor treating domestic wastewater. Results showed that nitrite of below 10mg/L did not inhibit P-uptake and release; whereas EBPR deterioration was observed when nitrite accumulation reached 20mg/L. Due to P-uptake prior to nitritation, nitrite of 20mg/L has no effect on aerobic P-uptake. The main reason leading to EBPR deterioration was the competition of carbon source. Batch tests were conducted to investigate nitrite effect on anaerobic P-release. Under sufficient carbon source, nitrite of 30 mg/L had no impact on poly-β-hydroxyalkanoate (PHA) storage; contrarily, under insufficient carbon source, denitrifiers competing for carbon source with phosphorus accumulating organisms resulted in decrease of PHA synthesis and P-release.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Zeng W,Yang Y,Li L,Wang X,Peng Y

doi

10.1016/j.biortech.2011.03.091

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

6657-64

issue

12

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(11)00448-2

journal_volume

102

pub_type

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