Removal of nitrogen from secondary effluent of a petrochemical industrial park by a hybrid biofilm-carrier reactor with one-stage ANAMMOX

Abstract

A laboratory study was undertaken to explore the capability of one-stage ANAMMOX in a hybrid biofilm-carrier reactor (HBCR) fed with petrochemical wastewater. Under favorable operating conditions in continuous-flow operations (at the dissolved oxygen level of 0.5-1.0 mg L(-1)), the average total nitrogen (TN) removal efficiency reached 62-67% and approximately 90% of TN can be removed by ANAMMOX. In batch operations of the hybrid biofilm-carrier reactor (without adding carbon substrate), the specific TN removal rate of the reactor in which both Kaldnes and nonwoven carriers were kept was two-fold higher than that of the reactor in which only nonwoven carriers were kept. This indicated that the microbial activity of thinner biofilms (Kaldnes carriers) was remarkably higher than that of thicker biofilms (nonwoven carriers). Finally, based on the 16S rRNA clone library, a cluster of ANAMMOX Candidatus Kuenenia stuttgartiensis was identified.

The start-up of an anammox reactor as the second step for the treatment of ammonium rich refinery (IGCC) wastewater with high C org /N ratio

“… observed up to 86% NRE in an anammox CSTR treating synthetic wastewater at various NLR (0.1-1.2 gN L -1 d -1 );Alavi et al (2011) reported a total nitrogen removal efficiency of 92.4% in an upflow anaerobic bioreactor (UABR) treating ammonium-rich wastewater produced by an ammonia plant, at similar applied NLR (0.45 gN L -1 d -1 );Lin et al (2014) observed a total nitrogen removal efficiency of 62-67% in a one stage anammox hybrid biofilmcarrier reactor (HBCR) treating petrochemical wastewater (NLR, 0.11-0.31 gN L -1 d -1 ).…”

Micro-Polluted Surface Water Treated by Yeast-Chitosan Bio-Microcapsules

“…Some studies have shown that Candida has a certain effect on the removal of nitrite from aquaculture water [41,42], but it requires a rich organic nutrient substrate in water. Therefore, the small fluctuation in the concentrations of NO 2 -N and NO 3 -N in the water is caused by microbial nitrification and denitrification.…”