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AAMI QUALITY SYSTEM - Quality System Compendium
January 1, 2015 - AAMI
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AWWA M56 - Nitrification Prevention and Control in Drinking Water
January 1, 2013 - AWWA

INTRODUCTION Nitrification is a microbiological process by which reduced nitrogen compounds (primarily ammonia) are sequentially oxidized to nitrite and nitrate (AWWA and EES 2002). Nitrification can be problematic in potable water systems that use chloramines for residual (or...

DS/EN ISO 9509 - Water quality - Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms
July 13, 2006 - DS

This International Standard specifies a method for assessing the short-term inhibitory effect of waters, waste waters or test substances on nitrifying bacteria in activated sludge. The inhibitory effect is estimated over an exposure period of usually 4 h or up to 24 h with weakly nitrifying sludge....

DIN EN 17090 - Fertilizers - Determination of nitrification inhibitor DMPSA in fertilizers - Method using high-performance liquid chromatography (HPLC)
January 1, 2019 - DIN

This document specifies a method for the determination of nitrification inhibitor 2-(3,4-dimethylpyrazol- 1-yl)-succinic acid (DMPSA) using high-performance liquid chromatography (HPLC), which is applicable to all mineral fertilizers.

DS/EN 17090 - Fertilizers – Determination of nitrification inhibitor DMPSA in fertilizers – Method using high-performance liquid chromatography (HPLC)
November 12, 2018 - DS

This document specifies a method for the determination of nitrification inhibitor 2-(3,4-dimethyl-pyrazol-1-yl)-succinic acid (DMPSA) using high-performance liquid chromatography (HPLC), which is applicable to all mineral fertilizers.

DSF/FPREN 17090 - Fertilizers – Determination of nitrification inhibitor DMPSA in fertilizers – Method using high-performance liquid chromatography (HPLC)
DS

This document specifies a method for the determination of nitrification inhibitor 2-(3,4-dimethyl-pyrazol-1-yl)-succinic acid (DMPSA) using high-performance liquid chromatography (HPLC), which is applicable to all mineral fertilizers.

DS/ISO 15685 - Soil quality - Determination of potential nitrification and inhibition of nitrification - Rapid test by ammonium oxidation
September 6, 2012 - DS

This International Standard specifies a rapid method for the determination of the potential rate of ammonium oxidation and inhibition of nitrification in soils. This method is suitable for all soils containing a population of nitrifying microorganisms. It can be used as a rapid screening...

ISO 15685 - Soil quality - Determination of potential nitrification and inhibition of nitrification - Rapid test by ammonium oxidation
July 15, 2012 - ISO

This International Standard specifies a rapid method for the determination of the potential rate of ammonium oxidation and inhibition of nitrification in soils. This method is suitable for all soils containing a population of nitrifying microorganisms. It can be used as a rapid screening...

DS/EN ISO 11733 - Water quality - Determination of the elimination and biodegradability of organic compounds in an aqueous medium - Activated sludge simulation test (ISO 11733:2004)
November 29, 2004 - DS

This International Standard specifies a method for the determination of the elimination and the biodegradibility of organic compounds by aerobic micro-organisms. The conditions described simulate a waste-water treatment plant. Two test systems can be used: activated sludge plants or porous...

DIN ISO 15685 - Soil quality - Determination of potential nitrification and inhibition of nitrification - Rapid test by ammonium oxidation (ISO 15685:2012)
December 1, 2012 - DIN

This International Standard specifies a rapid method for the determination of the potential rate of ammonium oxidation and inhibition of nitrification in soils. This method is suitable for all soils containing a population of nitrifying microorganisms. It can be used as a rapid screening...

DS/EN ISO 14238 - Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes
January 2, 2014 - DS

This International Standard specifies laboratory procedures for measuring the mineralization and nitrification of nitrogen by the soil microflora. For investigations of a basic or advisory nature, outline procedures are given for evaluation of the rates and extent of N-mineralization in soil...

ISO 14238 - Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes
August 1, 2012 - ISO

This International Standard specifies laboratory procedures for measuring the mineralization and nitrification of nitrogen by the soil microbiota. For investigations on the evaluation of soil quality or on effects of contamination, a procedure is given to measure the rates and extent...

DIN EN ISO 14238 - Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes (ISO 14238:2012)
March 1, 2014 - DIN

This International Standard specifies laboratory procedures for measuring the mineralization and nitrification of nitrogen by the soil microbiota. For investigations on the evaluation of soil quality or on effects of contamination, a procedure is given to measure the rates and extent...

Photo-Activated Sludge: A Novel Algal-Bacterial Biotreatment for Nitrogen Removal from Wastewater
January 4, 2019 - CRC

Nitrogen rich wastewaters (10-400 mg N L-1) are usually produced by municipal, industrial and agricultural wastes, such as effluents from anaerobic treatments. These represent a risk to the environment due to the high nutrient concentrations (nitrogen and phosphorous), which can cause...

DS/EN 15360 - Fertilizers - Determination of dicyandiamide - Method using high-performance liquid chromatography (HPLC)
May 31, 2007 - DS

This document specifies a method for the selective determination of dicyandiamide (DCD) in addition to all the other forms of nitrogen fixations, particularly in fertilizers to which DCD has been added as a nitrification inhibiting agent.

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