1. Introduction. Autotrophic nitrogen removal via partial nitritation (Reaction 1: NH 4 + + 1.5O 2 → NO 2 − + 2H + + H 2 O) and anammox (Reaction 2: NH 4 + + 1.32NO 2 − → 1.02N 2 + 0.26NO 3 − + 2•03H 2 O) has attracted increasing attention over the past decades owning to its abilities to reduce aeration consumption and to remove nitrogen …

Recently, autotrophic denitrification biofilters were conclusively implemented for advanced nitrogen removal in wastewater treatment plant (WWTP). However, residual organic sources after wastewater treatment could affect the electron distribution among denitrifying reductases and few studies are known about this issue.

Autotrophic FeBNR can treat low-C/N wastewater and greatly benefit the sustainable development of environmentally friendly biotechnologies for advanced …

CANON; Completely Autotrophic Nitrogen Removal Over Nitrite SHARON-ANAMMOX; Single Reactor High Activity Ammonia Removal Over Nitrite Combined - …

Nitrogen removal pathway and dynamics of microbial community with the increase of salinity in simultaneous nitrification and denitrification process ... Abundance of autotrophic ammonia-oxidizing bacteria (Nitrosomonas) increased with elevated salinity, while autotrophic nitrite-oxidizing bacteria (Nitrospira) exhibited extreme sensitivity to ...

In order to achieve high salinity autotrophic nitrogen removal, the effects of different salinities on the accumulation characteristics of NO 2 −-N and S 0 and microorganisms in DSSADN process were studied. The results showed that the effect of salinity on the DSSADN process could be categorized into the stimulation, stable, and …

Therefore, there were three main nitrogen removal pathways in E-CW, i.e., assimilation of plant and microbe, biological nitrification and denitrification and electrode-driven autotrophic denitrification. The specific nitrogen removal mechanism in E-CW was shown in Fig. 9. Download : Download high-res image (545KB) Download : Download full …

The completely autotrophic nitrogen removal over nitrite (CANON) process is a novel biological ammonium nitrogen removal technology that can serve as a power- and cost-saving alternativ e to nitri ...

The nitrogen removal pathway of the system gradually changed from autotrophic nitrogen removal to nitrification-denitrification. At the optimum C/N, the SPNAD system synergistically removed nitrogen through PNA and nitrification-denitrification. Overall, the unique reactor configuration facilitated the formation of …

The sulfur-based autotrophic denitrification (SADN) process was coupled with the PN-anammox in a single reactor to enhance and stabilize the nitrogen …

On the other hand, most of the autotrophic nitrogen removal systems reported in the literature, including anammox and related processes, were operated at temperatures above 25°C and influent ...

1. Autotrophic nitrogen removal in ecosystems 2. Biological wastewater treatment technologies 3. Anaerobic ammonia oxidation in water, wastewater, and soil 4. …

1. Introduction. Nitrogen (N) is essential for proteins, nucleic acids, enzymes, denitrifying bacteria, nitrifying bacteria, and ammoniating bacteria [].It is indispensable for plant growth, photosynthesis, energy transfer, and fertilizer synthesis [].However, excess nitrogen can harm aquatic ecosystems, causing eutrophication of amphibian systems …

It has been extensively used in nitrogen removal of mature landfill leachate due to its high efficiency, low cost and sludge yield. ... Huang, Y.; Yuan, Y.; Yuan, Y. Influence of seasonal temperature change on autotrophic nitrogen removal for mature landfill leachate treatment with high-ammonia by partial nitrification-Anammox process. J ...

The microflora from LD can completely realize nitrogen removal in man-made medium within 48 h, and remove 93.7 % ammonia nitrogen (NH 3-N) and 88.1 % COD from LD at optimum C/N ratio of 9. Sodium acetate and the fermented mash from grain ethanol production process are the preferable carbon sources to improve the removal of …

However, nitrogen removal by autotrophic microorganisms would be preferable, since it leaves the organic matter for methanogenic bacteria during wastewater treatment. Autotrophic denitrification (Ma et al., 2016), photoautotrophic systems (Ma et al., 2016) and anammox processes (Kartal et al., 2010) are the autotrophic nitrogen …

A coupling of Anammox and ZVI/Fe(II) reduction was achieved in a continuous-flow expanded granular sludge blanket (EGSB) to enhance autotrophic nitrogen …

Sulfur-driven autotrophic denitrification (SDAD), a process suited for the treatment of nitrogen and sulfur-polluted wastewater without extra supplement of organic carbon, is a promising biological nitrogen removal process.

The anammox bacteria then under anoxic conditions use this nitrite as the electron acceptor for oxidation of the other half of the ammonia, converting both to dinitrogen gas. This has been called the completely autotrophic nitrogen removal …

However, in another study using a thiosulphate-oxidising autotrophic denitrifying fluidised-bed reactor, Di Capua et al. found that although the ambient temperature was below 5 °C, the nitrogen removal rate could be successfully maintained at 3.3 kg N/(m 3 d). Thus, future studies should more extensively investigate the effect of …

Autotrophic nitrogen removal processes based on anammox are facing huge challenges of high effluent quality in wastewater treatment. In this study, a novel hybrid system of anammox coupled with heterotrophic endogenous metabolisms was developed in a single-stage bioreactor to treat real domestic wastewater. Complete nitrogen removal …

Due to carbon source dependence, conventional biological nitrogen removal (BNR) processes based on heterotrophic denitrification are suffering from great bottlenecks. The autotrophic BNR process represented by sulfur-driven autotrophic denitrification (SDAD) and anaerobic ammonium oxidation (anammox) provides a viable …

Nevertheless, when viewed from the aspect of nitrogen removal, the remediation efficiency of CWs is quite unsatisfactory and exhibits considerably fluctuating total nitrogen removal efficiencies ranging between 40% and 70%. ... Enhancement of the complete autotrophic nitrogen removal over nitrite process in a modified single-stage …

The membrane aerated biofilm reactor (MABR) is a novel bioreactor technology, facilitating single-stage autotrophic nitrogen removal. Two laboratory-scale MABRs equipped with non-woven fabrics were operated simultaneously without and with a self-forming dynamic membrane (SFDM) filtration module.

A new approach was developed to achieve autotrophic nitrogen removal from ammonium at low applied voltage in a single-compartment 3-dimensional microbial electrolysis cell (MEC). The MEC consisted of anodic and cathodic electrodes, on which nitrifying and denitrifying biofilms, respectively, were attached. Nitrogen removal can be …

Completely autotrophic nitrogen removal over nitrite (CANON) process was employed in an 18 L sequencing batch reactor (SBR) for treatment of optoelectronic industrial wastewater containing high strength ammonium nitrogen (3712 ± 120 mg NH 4 +-N L −1).About 89% of total nitrogen and 98% of NH 4 +-N removal efficiencies were …

The autotrophic nitrogen removal process coupling anammox with partial nitrification (PN) has been widely used in the treatment of wastewater with high ammonia and low carbon concentrations (Li et al., 2020a). Compared with the traditional nitrification and denitrification process, this coupled process has the characteristics of low oxygen ...

In conventional nitrogen removal process, the deep nitrogen removal was realized by nitrification and denitrification for low carbon wastewater with external organic carbon addition, which would lead to higher cost, excessive sludge production and also greenhouse gas emission (Li et al., 2022). Carbon neutrality is an unprecedented …

In order to enhance nitrogen removal, most organic matter is used as carbon source for the denitrifier. This results in lower energy production by the methanogenic bacteria. Therefore, autotrophic nitrogen removal technology, which can remove nitrogen without using organic matter, is considered to be a more sustainable way for …

Completely Autotrophic Nitrogen Removal over Nitrite (CANON) The CANON process is an integration of partial nitrification and anammox processes [ 57 ] [ 58 ] [ 59 ] . The name of this process derives from the sequential working mechanism of the two sets of bacterial communities in a single and aerated reactor: Nitrosomonas -like aerobic …