Water/Wastewater

  • Dedicated solution for online monitoring of ammonia in wastewater streams

Dedicated solution for online monitoring of ammonia in wastewater streams

Dec 21 2017 Read 940 Times

Metrohm Process Analytics offers a dedicated solution for hassle-free online monitoring of ammonia in wastewater streams. This turn-key solution uses photometric determination and is performed on the ICON Analyzer, a dedicated online photometer for water and wastewater analysis.

 

The importance of nutrient removal in the form of nitrogen in industrial and municipal wastewater has increased significantly over the past decade to minimize water pollution and avoid eutrophication of water bodies. Nitrogen present in wastewater as mostly organic nitrogen, ammonium/ammonia and nitrate must be treated to meet stringent effluent requirements imposed by legislation. Biological nutrient removal processes (BNR) in place at modern wastewater treatment plants employ nitrification and denitrification processes to convert ammonium into harmless N2 gas, which is then released into the atmosphere.

Online monitoring of the nitrogen compounds in waste effluent guarantees high nutrient treatment efficiency and low operating and energy costs. For example, an increase in ammonia and nitrite levels in the effluent indicate an insufficient aeration step or that a change in toxicity or pH is disturbing the nitrifier (bacteria) population. Costs incurred from a plant shutdown due to insufficient nutrient removal, including replacement of the bacteria, can be extremely high. Metrohm Process Analytics offers robust single-method process analyzers which come fully configured for analyses such as ammonia and nitrite – just Plug and Analyze.

The fully-automated photometric ammonia analysis is based on the Berthelot method. After addition of a stabilized hypochlorite solution, the ammonia reacts quantitatively to monochloramine. The formed monochloramine creates a quinone monoimine when nitroprusside is added to the cuvette. This quinone monoimine reacts finally with a thymol molecule to the respective indophenol dye, which in an alkaline medium occurs in the blue basic form and is measured at 660 nm in a thermostated cuvette for added stability.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment




Digital Edition

Asian Environmental Technology September 2019

September 2019

In This Edition Business News - Lord Lieutenant presents Queen’s Award to water testing equipment manufacturer - AGT-PSG open subsidiary in Singapore to offer perfect sample gas solutions...

View all digital editions

Events

Analitica Latin America

Sep 24 2019 Sao Paulo, Brazil

CEM India

Sep 24 2019 New Delhi, India

LABComplEX

Sep 25 2019 Kiev, Ukraine

Thai International Water Week

Sep 26 2019 Taipei, Taiwan

Environment and Energy Trade Fair 2019

Sep 27 2019 Riga, Latvia

View all events