Nitrogen Removal Review

Nitrogen Removal from Oil: A Review

The review of processes to remove nitrogen from oil emphasizes studies that investigated denitrogenation of industrial feedstocks, such as refinery fractions, heavy oils, and bitumens. The main topics covered are hydrotreating, liquid−liquid phase …

Nitrogen Removal: A Literature Review

Nitrogen removal: a literature review Thomas G. Reeves The removal of nitrogen and nitrogen compounds from wastewater is re ceiving wide attention because the dis charge of these contaminants is manifested in the growth of algae and aquatic plants. Unless steps are taken to control the dis charge of these contaminants, overfertiliza

Nitrogen Removal from Oil: A Review | Energy & Fuels

The selective removal of nitrogen-containing compounds from oil and oil fractions is of interest because of the potential deleterious impact of such compounds on products and processes. Problems caused by nitrogen-containing compounds include gum formation, acid catalyst inhibition and deactivation, acid–base pair-related corrosion, and metal complexation. A brief overview of the classes of nitrogen compounds found in oil is provided. The review of processes to remove nitrogen …

Nitrogen Removal from Oil: A Review - ResearchGate

Download Citation | Nitrogen Removal from Oil: A Review | The selective removal of nitrogen-containing compounds from oil and oil fractions is of interest because of the potential deleterious ...

Critical review of effluent dissolved organic nitrogen ...

This paper critically reviews these systems with a focus on removing nitrogen, particularly low levels of dissolved organic nitrogen (DON) present in the wastewater effluent. DON in wastewater effluent is a concern because of its contribution to nitrogen concentration in surface or groundwater and its role as a precursor of nitrogenous disinfection by-products, which are harmful to human health. Biodegradation and sorption are the main DON removal …

A Review of Nitrogen Removal for Urban Stormwater …

Nitrogen has a complex biogeochemical cycle, and thus the removal processes of nitrogen are typically slower than other pollutants. This study summarizes recent studies that have focused on nitrogen removal for urban stormwater runoff and discusses the latest advances in bioretention systems. The performance, influencing factors, and design enhancements are comprehensively reviewed in this paper. The review …

Nitrogen removal in constructed wetland systems - Lee ...

This paper provides a review of the current state of nitrogen removal technology, focusing on existing types of wetlands, the mechanisms of nitrogen removal, major environmental factors relative to nitrogen removal, and the operation and management of the wetlands.

(PDF) Physico-chemical technologies for nitrogen removal ...

Among the novel techniques for nitrogen removal from aqueous solutions, the freezing-melting process is of the most convenient and effortless especially for a nonexpert person. The main objective ...

How effective are created or restored freshwater wetlands ...

09/05/2016· In this review, removal refers to a reduced amount of nitrogen and phosphorus in the water phase. Removal processes imply transformation of the nutrients to other forms; for nitrogen this often means nitrogen gas and a smaller proportion of the greenhouse gas nitrous oxide, which will be emitted to the atmosphere.

Review: recent developments of substrates for nitrogen …

29/05/2020· Substrates are the main factor influencing the performance of constructed wetlands (CWs), and especially play an important role in enhancing the removal of nitrogen and phosphorus from CWs. In the recent 10 years, based on the investigation of emerged substrates used in CWs, this paper summarizes the removal efficiency and mechanism of nitrogen and phosphorus by a single …

A Review of Nitrogen Removal for Urban Stormwater …

Nitrogen has a complex biogeochemical cycle, and thus the removal processes of nitrogen are typically slower than other pollutants. This study summarizes recent studies that have focused on nitrogen removal for urban stormwater runoff and discusses the latest advances in bioretention systems. The performance, influencing factors, and design enhancements are comprehensively reviewed in this paper. The review …

A Review of Nitrogen Removal for Urban Stormwater …

The review of current literature reveals that a bioretention system shows great promise due to its ability to remove nitrogen from stormwater runoff. Combining nitrification and denitrification zones with the addition of a carbon source and selecting different plant species promote nitrogen removal. Nevertheless, more studies on nitrogen …

(PDF) Effective Biological Nitrogen Removal Treatment ...

Therefore, this article reviews innovative nitrogen removal pathways and available biological treatment processes that are capable of nitrogen removal with low or zero organic carbon demand. In addition, conventional and alternative external carbon sources that can be used for enhanced nitrogen removal are also discussed and summarized. Hopefully, this review can provide guidance to municipal WWTPs operators and planners to select cost-effective nitrogen removal …

Effective Biological Nitrogen Removal Treatment …

16/02/2010· Biological nitrogen removal can remove nitrogenous components via conversion to harmless nitrogen gas with high efficiency and relative low costs. However, the removal of nitrogen from domestic wastewater with a low carbon/nitrogen (C/N) ratio can often be limited in municipal wastewater plants (WWTPs) because organic carbon is a limiting factor for denitrification. The present work reviews innovative bacterial nitrogen removal …

Review: recent developments of substrates for nitrogen …

29/05/2020· Shen, S., Li, X., Cheng, F. et al. Review: recent developments of substrates for nitrogen and phosphorus removal in CWs treating municipal wastewater. Environ Sci Pollut Res 27, 29837–29855 (2020). https://doi.org/10.1007/s11356-020-08808-y

Effective Biological Nitrogen Removal Treatment …

The present work reviews innovative bacterial nitrogen removal pathways such as shortcut nitrification/denitrification, simultaneous nitrification/denitrification, and the nitritation Anammox process, which can remove nitrogen with low or zero dosage of organic carbon sources. We conclude that advanced process control and some new biological treatment processes including the modified …

Anammox and partial denitrification coupling: a review ...

As a new wastewater biological nitrogen removal process, anammox and partial denitrification coupling not only plays a significant role in the nitrogen cycle, but also holds high engineering application value. Because anammox and some denitrifying bacteria are coupled under harsh living conditions, certain operating conditions and mechanisms of the coupling process are not clear; thus, it is more difficult to …

Meta‐Analysis of Nitrogen Removal in Riparian Buffers ...

Nitrogen removal effectiveness varied widely. Wide buffers (>50 m) more consistently removed significant portions of nitrogen entering a riparian zone than narrow buffers (0–25 m). Buffers of various vegetation types were equally effective at removing nitrogen but buffers composed of herbaceous and forest/herbaceous vegetation were more effective when wider. Subsurface removal of nitrogen was efficient, but did not appear to be related to buffer width, while surface removal of nitrogen …

How effective are created or restored freshwater wetlands ...

28/08/2013· Vymazal reviewed nitrogen retention in constructed wetlands (Free-floating Plants (FFP), Free Water Surface systems (FWS), horizontal sub-surface flow systems (HSSF) and vertical sub-surface flow systems (VSSF)) and concluded that removal of total nitrogen varied between 40 and 50% with removed load ranging between 250 and 630 g N m −2 yr −1 depending on CW type and inflow loading.

The Kinetic Expressions for the Nitrification Process ...

Last Updated on Fri, 05 Mar 2021 | Nitrogen Removal. A review of the literature concerning the nitrification process shows diverse opinions regarding the reaction rate equation for the nitrification process. Several rate equations have been proposed.

Nitrogen removal in constructed wetland systems

Review Nitrogen removal in constructed wetland systems Since the mid 1990s, constructed wetlands have been increasingly used as a low-energy ‘green’ technique, in the treatment of wastewater and stormwater, driven by the rising cost of fossil fuels and increasing concern about climate change. Among various applications of these wetlands, a significant area is the removal of nitrogenous ...

Ammonia Nitrogen Removal by Single-stage Process: A …

The conventional biological nitrogen removal process is used for treating wastewaters with The working principle of single-stage relatively low nitrogen concentrations (total nitrogen nitrogen removal process is based on microbiology concentration less than 100 mg N/L). The and application technology of functional requirement of added electron donors (methanol, microorganisms. acetate etc) makes full-scale denitrification quite expensive for wastewater with higher nitrogen …

[Impact of salinity on nitrification in the process of ...

Nitrification is the key step of biological nitrogen removal process, thus researching the effect of salinity on nitrification is significant. In this article, the research progress of the impact of salinity on wastewater biological nitrification process was summarized. The influences of salinity stress on various aspects of nitrification process, including the efficiency of ammonia oxidation and nitrite oxidation processes, and …

Effective biological nitrogen removal treatment processes ...

Biological nitrogen removal can remove nitrogenous components via conversion to harmless nitrogen gas with high efficiency and relative low costs. However, the removal of nitrogen from domestic wastewater with a low carbon/nitrogen (C/N) ratio can often be limited in municipal wastewater plants (WWTPs) because organic carbon is a limiting factor for denitrification denitrification Subject …

Review: recent developments of substrates for nitrogen …

29/05/2020· Shen, S., Li, X., Cheng, F. et al. Review: recent developments of substrates for nitrogen and phosphorus removal in CWs treating municipal wastewater. Environ Sci Pollut Res 27, 29837–29855 (2020). https://doi.org/10.1007/s11356-020-08808-y

Meta‐Analysis of Nitrogen Removal in Riparian Buffers ...

Nitrogen removal effectiveness varied widely. Wide buffers (>50 m) more consistently removed significant portions of nitrogen entering a riparian zone than narrow buffers (0–25 m). Buffers of various vegetation types were equally effective at removing nitrogen but buffers composed of herbaceous and forest/herbaceous vegetation were more effective when wider. Subsurface removal of nitrogen was efficient, but did not appear to be related to buffer width, while surface removal of nitrogen …

The Kinetic Expressions for the Nitrification Process ...

Last Updated on Fri, 05 Mar 2021 | Nitrogen Removal. A review of the literature concerning the nitrification process shows diverse opinions regarding the reaction rate equation for the nitrification process. Several rate equations have been proposed.

Nitrogen and Phosphorous Removal in Municipal …

Nitrogen removal could be improved in Carrousel OD by controlling the return sludge flow, dissolved oxygen (DO), and influent sites according to the influent loadings and temperature . The promotion of DO distribution to nitrogen removal was also observed in a fluidized bed reactor, which was affected by the vertical stratification of active sludge populations [ 35 ].

Anammox Process for Nitrogen Removal from Water …

18/01/2021· Amongst biological treatment ways for removal of nitrogen from waterways, anaerobic ammonium oxidation (anammox) has gained researchers’ attention. Anammox is a biological procedure capable of anaerobic conversion of NH4+ to dinitrogen (N2) gas with NO2 as an electron acceptor. The anammox process has been demonstrated to be a better substitute for conventional techniques …

Physical-Chemical Nitrogen Removal Wastewater …

The relative costs of the physical-chemical nitrogen processes for a 10-mgd plant are • Ammonia stripping, 5 cents per 1,000 gallons • Selective ion exchange, 10-13 cents per 1,000 gallons • Breakpoint chlorination, 11 cents per 1,000 gallons These costs all are based on the removal of 25 mg/1 ammonia nitrogen. The cost of biological nitrogen removal by the three-stage activated-sludge ...

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