denitrification process Articles
-
Treatment of mixed municipal and winery wastewaters in a conventional activated sludge process: a case study
ABSTRACTThe possibility of co-treating municipal and winery wastewaters in a conventional activated sludge process was studied at full scale. The wastewater treatment plant considered in this paper operated an extended-oxidation process during vintage (four month per year) and a pre-denitrification/oxidation process during the rest of the year. The experimentation showed that good performances, ...
-
Effects of carbon sources, COD/NO2−-N ratios and temperature on the nitrogen removal performance of the simultaneous partial nitrification, anammox and denitrification (SNAD) biofilm
The aim of the present work was to evaluate the effects of carbon sources and chemical oxygen demand (COD)/NO2−-N ratios on the anammox–denitrification coupling process of the simultaneous partial nitrification, anammox and denitrification (SNAD) biofilm. Also, the anammox activities of the SNAD biofilm were investigated under different temperature. Kaldnes rings taken from the SNAD biofilm ...
-
Simultaneous carbon and nitrogen removal from municipal wastewater in full-scale unaerated/aerated submerged filters
Characterization and evaluation of a biological submerged filter was carried out on a full-scale pilot plant performing removal of biochemical oxygen demand (BOD) and total nitrogen (TN) from pre-treated urban wastewater. The average influent values of BOD5, chemical oxygen demand (COD) and TN were 370, 1,015 and 60 mg/L, respectively. The pilot plant produced good discharge quality during ...
-
Bioelectrochemical nitrogen removal as a polishing mechanism for domestic wastewater treated effluents
Addition of an external carbon source is usually necessary to guarantee a sufficiently high C/N ratio and enable denitrification in wastewater treatment plants (WWTPs). Alternatively, denitrification processes using autotrophic microorganisms have been proposed i.e., with the use of H2 as electron donor or with the use of cathodic denitrification in bioelectrochemical systems (BES), in which ...
-
Toluene in sewage and sludge in wastewater treatment plants
Toluene is a compound that often occurs in municipal wastewater ranging from detectable levels up to 237 μg/L. Before the year 2000, the presence of the aromatic hydrocarbons was assigned only to external sources. The Enhanced Biological Nutrients Removal Processes (EBNRP) work according to many different schemes and technologies. For high-efficiency biological denitrification and ...
-
Technical and experimental evaluation of an innovative decentralized technology for the municipal wastewater treatment in the city of Rome
The present paper shows the results obtained through an experimental activity carried out on a pilot-scale plant using an innovative technology which couples the granular aerobic sludge with the sequencing batch process. Treatment efficiency and operation costs were evaluated in order to assess feasibility of this new technology for the upgrading of the existing continuous flow activated sludge ...
-
Impact of fine mesh sieve primary treatment on nitrogen removal in moving bed biofilm reactors
The purpose of this project was to investigate the effect of selective particle removal during primary treatment on nitrogen removal in moving bed biofilm reactors (MBBRs). Two small MBBR pilot plants were operated in parallel, where one train treated 2 mm screened municipal wastewater and the other train treated wastewater that had passed through a Salsnes Filter SF1000 rotating belt sieve ...
-
A combined UASB-MBR with shortcut nitrification-denitrification for energy reduction in wastewater reclamation
Shortcut nitrification has been successfully applied in a laboratory scale nitrification-denitrification process consisting of an up-flow anaerobic sludge blanket (UASB) and an aerobic membrane bioreactor (MBR) in treating synthetic and municipal wastewater to simultaneously remove organic carbon and nitrogen. For the treatment of synthetic wastewater, the combined system exhibited a high TOC ...
-
Analysis of the impact of the industrial fat, oil and grease (FOG) on a municipal wastewater treatment plant by means Respirometry and microscopic Bioindication
Abstract The main impact that the industrial fat, oil and grease (FOG) could make in a municipal wastewater treatment plant is mainly coming from its slowly biodegradable COD (sbCOD) The wastewater entering in a municipal WWTP tends to include a percentage of slowly biodegradable COD in the range of 35 to 65% of the total COD; but when this percentage surpasses the habitual range, normally it ...
By SURCIS, S.L.
-
Ammonia and nitrate measurement in municipal wastewater applications - Case Study
Advantages of the Advanced Sensor Technology real-time continuous online measurement systems for ammonia and nitrate Low Initial Procurement Cost compared to competing technologies and offerings No need for chemical feed and rebuilding of sensors Lower Cost of Ownership due to very long sensor lifetime, low maintenance & cleaning requirements for inline, immersion & submersion ion ...
-
N2O emissions from secondary clarifiers and their contribution to the total emissions of the WWTP
Recent studies have indicated that the emissions of nitrous oxide, N2O, constitute a major part of the carbon footprint of wastewater treatment plants (WWTPs). Denitrification occurring in the secondary clarifier basins has been observed by many researchers, but until now N2O emissions from secondary clarifiers have not been widely reported. The objective of this study was to measure the N2O ...
-
Wastewater Use in Crop Irrigation Higher Than Thought
While many farmers around the world rely on wastewater for their crops, the practice can be dangerous without proper treatment and management A recent study reveals that the amount of water originating from urban wastewater used for crop irrigation around the world is much higher than thought. For the first time, researchers decided to assess not only the direct use of wastewater for crop ...
-
Study: Wastewater Use in Crop Irrigation Higher Than Thought
Many farms in countries including China are highly reliant on wastewater for irrigation, which may affect public safety. While many farmers around the world rely on wastewater for their crops, the practice can be dangerous without proper treatment and management A recent study reveals that the amount of water originating from urban wastewater used for crop irrigation around the world is much ...
-
What is Ion Exchange?
Although many water purification technologies are available, ion exchange is well-suited for highly selective removal of specific contaminants Ion exchange is a water treatment process commonly used for water softening or demineralization, but it also is used to remove other substances from the water in processes such as dealkalization, deionization, denitrification, and disinfection. With many ...
-
General Oxygen Requirements for Wastewater Treatment
TECHNICAL BULLETIN 135 General Oxygen Requirements for Wastewater Treatment Oxygen requirements for municipal wastewater treatment can be predicted closely with the standard laboratory analysis using g the BOD test (special requirements exist for some industrial wastewater). The BOD test is designed to measure Biological Oxygen Demand for the wastewater and provides an excellent basis for ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you