Response of rotating biological contactor started up by heterotrophic nitrification-aerobic denitrification bacteria to various C/N ratios

Bioelectrochemical systems for enhanced nitrogen removal with minimal greenhouse gas emission from carbon-deficient wastewater: A review

“…Carbon-deficient wastewater includes a wide range of municipal and industrial sources and secondary effluents from biochemical treatment of domestic, industrial, and agricultural wastewater. Carbon-deficient wastewater also includes tail-water with limited carbon source such as toilet recycling flushing water, secondary effluents from wastewater treatment plants, and industrial and agricultural wastewater tail-water from the fertilizer, coking, breeding, livestock and poultry industries (Cao et al, 2019;Chen et al, 2022). The annual production of carbondeficient wastewater is estimated to reach 60 billion tons by 2030 in China for municipal treatment plants (Chang and Wang, 2015).…”

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

“…The Proteobacteria also accumulate phosphorus, thereby contributing to phosphorus removal from water 36 . Patescibacteria play a significant role in biofilm formation 37 , degrade organic compounds 38 , and extensively participate in denitrification processes 39 . Fusobacteria is the key microorganism responsible for nitrificationdenitrification in municipal wastewater treatment system 40 According to Fig.…”

“…Polynucleobacter belongs to the β-Proteobacteria is a major participant in nitrogen removal 35 , and is the predominant biofilm communities adhering at concrete structures in reservoirs 42 . Cetobacterium accelerates the nitrification, denitrification, and nitrate reduction processes in coarse sediments 36,37 , whereas Lacibacter is an iso-ammoxidation bacterium 38 that can reduce the ammonia nitrogen content and use a small amount of nitrite as a nitrogen source for growth. Flavobacterium contains denitrifying bacteria with NOx-reduction properties 42 , and could effectively use carbon sources for heterotrophic denitrification 43 .…”

“…Cetobacterium possesses nitrate reduction activity and can enhance nitrification, denitrification, and nitrate reduction processes in coarse sediments 19 . Polynucleobacter and Devosia, belonging to Proteobacteria, are major participants in nitrogen removal 19,35,37 . Flavobacterium is one of the denitrifiers with NOx-reduction characteristics 42 .…”

A Review of Rotating Biological Contactors for Wastewater Treatment

“…If the discs in the RBC become clogged, the treatment efficiency is significantly reduced, requiring regular maintenance and cleaning. RBCs are limited in their ability to retain sludge, a disadvantage in certain applications where sludge retention is important [25,26].…”