A previous study demonstrated that denitrification synergized with Anammox could accelerate the anaerobic degradation of benzene. The inhibitory effects of benzene, toluene, phenol and benzoate in single and combination on Anammox activity were investigated by short-term batch tests. The results indicated that the inhibition of single compounds on Anammox could be well fitted with the extended non-competitive and Luong inhibition kinetic models. The inhibitions of the individual compound were in order as follows: benzene > toluene > phenol > benzoate. The joint inhibitions of bi-component mixtures of benzene with toluene, benzene with phenol and benzene with benzoate on Anammox activity were additive; the joint inhibition of a tri-component mixture (benzene, toluene and phenol) was partly additive; and the joint inhibition of a multicomponent mixture (benzene, toluene, phenol and benzoate) was synergistic. The effect of benzoate on the denitrification–Anammox synergy for benzene degradation was evaluated using a long-term test. Although the average rate of benzene degradation decreased by 13% with the addition of 10 mg L−1 benzoate, the average rate of NO3− and NH4+ increased by approximately 1- and 0.56-fold, respectively, suggesting that benzoate favors the stability of the denitrification–Anammox synergy. The carboxylation of benzene would be a more favorable pathway for the anaerobic degradation of benzene under denitrification synergized with Anammox.
This is a preview of subscription content, log in to check access.
The partial financial support from the State Fundamental Research Funds for the Central Universities in China (0222005202053), the research of foundational science and advanced technology of Chongqing (cstc2017jcyjBX0042), the Natural Science Foundation of China (NSF 51078365), the Scientific Research Foundation (2011DA105287-ZD201505) of the State Key Laboratory of Coal Mine Disaster Dynamics and Control and the National Science and Technology Major Project for Water Pollution Control and Remediation (2012ZX07307-001) is gratefully acknowledged.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no competing interests.
This article does not contain any studies with human participants or animals performed by any of the authors.
APHA (2006) American Public Health Association. Standard Methods for the Examination of Water and Wastewater. American Public Health Association, American Water Works Association, Water Environment Federation 1085Google Scholar