Advanced Nitrogen Removal Characteristics of Low Carbon Source Municipal Wastewater Treatment via Partial-denitrification Coupled with ANAMMOX
(2.School of Ecology and Environment, Hainan University, Haikou, China 570228)
【Abstract】Partial-denitrification coupled with ANAMMOX is a novel biological nitrogen removal technology, which is expected to slash the external carbon source dosage for advanced nitrogen removal from municipal wastewater. In this study, ANAMMOX sludge was inoculated to investigate advanced nitrogen removal performance and sludge characteristics in a partial-denitrification/ANAMMOX reactor. The results showed that inoculation of ANAMMOX sludge could quickly start the partial-denitrification/ANAMMOX reactor. The effluent total nitrogen concentrations were (4.82 ± 1.84) mg·L−1 with a chemical oxygen demand of 2.19 ± 0.08. Sludge particles larger than 0.20 mm accounted for 86.16% in the reactor. This meant that granular sludge was formed, which was conducive to good retention of ANAMMOX bacteria in the reactor. The external carbon source dosage and the oxygen requirement for nitrification can be reduced by applying partial-denitrification coupled with ANAMMOX to advanced nitrogen removal from the effluent of secondary clarifier in municipal wastewater treatment plants.
【Keywords】 municipal wastewater; partial-denitrification; ANAMMOX; advanced nitrogen removal; granular sludge;
(Translated by CHEN ZZ)
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