nitrification Articles

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Nitrification Insurance

by Cleveland Biotech Ltd.  (Apr. 1, 2011)

A market leader in biomass engineering has launched a 24-hour biological safeguard system to protect organisations operating treatment plants against discharging illegal levels of ammonia. North East-based Cleveland Biotech (CB) has seen an increase in enquiries for its Amnite NS5000 product from companies which are obliged to prove to ...

Inhibition of unwanted nitrification

by SURCIS, S.L.  (Jan. 19, 2016)

Respirometer The respirometer utilized in this study corresponds to the BM-Advance model, with the following main features: Compact analyzer, with very low maintenance and user friendly operation Direct oxygen measurements from a maintenance-free oxygen sensor No oxygenation restriction during test performance Full control and results by ...

Nitrification case study

by Cleveland Biotech Ltd.  (May 29, 2014)

The Bay View effluent treatment plant is one of the largest wastewater treatment facilities in North West Ohio, USA. The facility is located near the mouth of the Maumee River and provides treatment for an area of about 100 square miles. About 84 square miles of this area is located within Toledo city. The population that it serves is ...

Case of Study – Low nitrification

by SURCIS, S.L.  (Jul. 15, 2011)

BM Respirometer The respirometer utilized for the study was a BM-T, provided with external thermostatic unit (bath) This “batch system” respirometer consists of: a single reactor vessel, divided into two interconnected compartments with closed recirculation loop between the two. Both compartments are kept completely mixed by means of ...

Nitrification in Monochloramine-Treated Water Systems

by LuminUltra Technologies Ltd.  (Jan. 21, 2013)

A Water utility based int the Midwest USA uses Monochloramine treatment to treat their two surface water treatment plants to disinfect raw water and establish residual disinfectant prior to discharge to their distribution system.  Like most water utilities that use Monocholoramines, a common area of concern is nitrification. Residual ammonia ...

Industrial Wastewater: Nitrification Inhibition Tests

by microLAN On-line Biomonitoring Systems  (Jan. 1, 2007)

Is the biology in your sewage plant working properly? During aerobic and anaerobic decomposition reactions nitrogen from nitrogen-containing organic substances is first converted to ammonium.   The subsequent two-step microbial oxidation of ammonia to nitrate via nitrite is called nitrification. In soil as well as in water it is ...

Nitrification of high salinity chemical effluents

by LEVAPOR GmbH, Biofilm Technologies  (Dec. 15, 2009)

1. The problem While during the biotreatment of non inhibitory chemical effluents containing 30 to 60 g/L salt the main part of organic pollutants (TOC, COD) do become degraded, is the nitrification of the present NH4N by suspended biomass because of high osmotic pressure in the reactor not possible. 2. The solution Lab scale tests have shown, ...

Tertiary Nitrification Process - Case Study

by Advanced Bioprocess Development Limited (ABD)  (Jul. 25, 2016)

Our nitrification process was originally developed for ammonia removal from activated sludge final effluent. However, it has since been applied to sludge liquor ("reject water", "centrate" or "filtrate") treatment. It is also suitable for nitrification of potable water sources (e.g. surface or ground water) prior to chlorination, to reduce the ...

Post Lagoon Nitrification in Cold Climates

by Nelson Environmental Inc.  (Aug. 1, 2009)

A Submerged Attached Growth Reactor (SAGR) Demonstration Site has been in operation following a primary aerated lagoon in Steinbach, MB since August 2007. This system provides nitrification, with influent winter water temperatures (post lagoon) below 0.5 degrees Celsius. The performance objective of the system was to achieve effluent cBOD5 and TSS ...

Nitrogen balance and transformation in the nitrification process of coking wastewater and the influence on nitrification kinetics

by IWA Publishing  (Apr. 10, 2014)

This paper describes the total nitrogen balance, and the direction and degree of nitrogen transformation during the nitrification process of coking wastewater. According to the actual nitrification process, the conventional nitrification kinetic equation was amended. After 48 h of nitrification, the total nitrogen content remained almost the ...

Kinetic study of compost liquor nitrification

by IWA Publishing  (Mar. 1, 2011)

This study is a first kinetic approach about the compost liquor treatment by activated sludge. This industrial wastewater is highly loaded in organic and nitrogen compounds (COD≈12,000 mg L−1 and NH4+-N≈4,000 mg L−1). The possibility of its treatment in an urban WWTP is studied measuring ammonia oxidation rate with non-acclimated sludge to the ...

High-Rate Nitrification by CO2-Sensitive Nitrifying Bacteria

by Water Environment Federation (WEF)  (Oct. 21, 2006)

High-rate nitrification has been observed in a lab-scale activated sludge reactor using synthetic wastewater under increased (1%) pCO2. The populations found in the reactors were challenged by drastically reducing the solids retention time to cause washout of slow growing bacteria. Under conditions of increased pCO2 the experimental reactor ...

Temporal variation in maximum cell-specific nitrification rate

by IWA Publishing  (Apr. 1, 2010)

The cell numbers of ammonia-oxidising bacteria (AOBs), Nitrospira and Nitrobacter in activated sludge used to treat wastewater from a thermal power plant in Japan were examined for nine months using a real-time PCR quantification technique. AOB cell numbers ranged 2.8 × 1010–2.3 × 1011 cell/L. The amoA clone analysis showed that the only ...

Influence of shear on nitrification rates in a membrane bioreactor

by IWA Publishing  (Apr. 24, 2014)

Grundfos BioBooster (GBB) installed and operated a membrane bioreactor (MBR) test plant in 2012. During the period it became evident that the nitrification rate was lower than expected and a study was carried out to investigate the possible reasons for the observed low-nitrification rate. Tests were conducted at a pilot plant and the effect of ...

Recovery of Nitrification pharmaceutical company case study

by Bio Systems Europe  (Aug. 9, 2013)

One Sunday in May our weekend standby service received a telephone call from a pharmaceutical company who’s waste water treatment system had suffered a plant upset, thought to have occurred the previous day, resulting in the loss of nitrification. The standard to be maintained is 10 mg/l. Because of the urgency of the situation our team ...

Factors influencing nitrification in point-of-use BioSand filters

by IWA Publishing  (Aug. 29, 2013)

The BioSand filter (BSF) is a point-of-use treatment technology used in developing countries to improve drinking water quality. Studies on the BSF to date have mainly focused on bacterial, protozoan and virus reduction and less on the filter's effect on chemical contaminants that may also affect human health. This study explored the ...

Nitrification toxicity evaluation using bench-scale testing

by Water Environment Federation (WEF)  (Oct. 13, 2007)

The Camas Wastewater Treatment Facility experienced a prolonged period of poor ammonia removal (nitrification). A variety of “real-world” bench tests were developed and performed to determine if toxins were inhibiting the nitrification process. The focus of this paper is on the methodology used and conclusions drawn from the bench-testing. ...

Achieving nitrification in sewage lagoons with an innovative floating RBC

by Water Environment Federation (WEF)  (Oct. 13, 2007)

The research involved the newly developed floating rotating biological contactor (FRBC), a unique unit consisting of a rotating cage filled with hollow, spherical packing of injection molded plastic. The cage rotates to provide biomass a chance to contact both substrate and air. A partially mixed three-cell aerated lagoon was selected for the ...

Simultaneous Nitrification and Denitrification through Low-DO Operation

by Water Environment Federation (WEF)  (Oct. 21, 2006)

Single-tank simultaneous nitrification and denitrification (SNdN) processes can potentially eliminate the need for separate tanks and for recycling mixed liquor from oxic nitrifying zones to the typically upstream anoxic zones for denitrification. However, the conditions involved are more susceptible to sludge bulking by excessive growth of ...

Nitrification of centrate from dewatering of anaerobically digested sludge

by Inderscience Publishers  (Sep. 15, 2009)

Nitrification of anaerobically digested sludge centrate was studied in bench-scale suspended growth and fixed film enhanced suspended growth systems at temperatures of 10.5-28.5°C and pH values of 6.0-9.1. Nitrification followed zero-order kinetics in both systems, and ammonia removals in excess of 99% were observed. The temperature ...

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