Respirometric assessment of aerobic sludge stabilization.

Abstract:

:Aerobic sludge stabilization was assessed respirometrically with the sludge taken from the secondary settling tank of a domestic wastewater treatment facility in Istanbul, Turkey. Zero-order removal rates of 178, 127 and 44 mg/L day were found for Suspended Solids (SS), Volatile Suspended Solids (VSS) and Total Organic Carbon (TOC) at the end of 18 days sludge stabilization, respectively. Significant nutrient release was observed by the mineralized nitrogen and phosphorus from the death and lysis of microorganisms. The model simulations for the batch respirometric assays for initial, 7th and 18th days of the stabilization agree reasonably well with the experimental data. The maximum storage rates (k(sto)) as well as maximum growth rates on stored products (micro(H2)) decrease with increasing stabilization period. Respirometric assays indicated the presence of microorganisms that started to compete with the dominant microorganisms as a result of the stabilization. As such, these findings have significance in terms of the efforts related to the sludge management and application processes.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Tas DO

doi

10.1016/j.biortech.2009.10.058

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

2592-9

issue

8

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(09)01434-5

journal_volume

101

pub_type

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