Entry number：05
SUBJECT
Feasibility evaluation of Nitrite/Nitrate Dependent Anaerobic Methane Oxidation (N-DAMO) Microorganisms for nitrate removal in industrial wastewater
DEPARTMENT
Department of Environmental Engineering
PROFESSOR AND STUDENT
Professor：Liang-Ming Whang
Student：Chen Tin Yin
ABSTRACT
Nitrite/Nitrate-dependent anaerobic methane oxidation (N-DAMO) microorganisms utilize methane as electron donor and carbon source for denitrification. The application of N-DAMO microorganisms in wastewater treatment process can simultaneously solve problem of methane emission and deficiency of carbon in wastewater for denitrification.
In this study, N-DAMO microorganisms was enriched in the anaerobic fluidized membrane bioreactor (AFMBR) in industrial wastewater with high conductivity, high nitrate concentration and low TOC. Batch experiments were conducted to evaluate N-DAMO microorganisms’ performance among different environmental factors, including nitrate concentration, methane concentration and conductivity. The result of batch experiments indicated that elevated nitrate concentration, methane concentration and conductivity could increase N-DAMO contribution.
The best performance of AFMBR was influent nitrate concentration and HRT set to 45 mg-N/L and 1.5 days, nitrate removal could maintain at 95%.
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