Ammonia Removal Using Biotrickling Filters: Part A: Determination of the Ionic Nitrogen Concentration of Water Using Electrical Conductivity Measurement

ChemEngineering

Solène Lagadec¹  Nadine Guingand²  Laurence Loyon³  Annabelle Couvert⁴  Valérie Couroussé⁴  Abdeltif Amrane⁴  Éric Dumont⁵ 

[1] Chambre d’Agriculture de Bretagne, 35042 Rennes, France;IFIP Institut du Porc, 35651 Le Rheu, France;INRAE, 35044 Rennes, France;ISCR–UMR6226, CNRS, ENSCR, Université de Rennes, 35000 Rennes, France;UMR 6144, Oniris, GEPEA, Université de Nantes, IMT Atlantique, 44307 Nantes, France;

关键词: ammonia;    absorption;    mass transfer;    air treatment;    biofiltration;    electrical conductivity;   

DOI  :  10.3390/chemengineering4030049

来源: DOAJ

【 摘 要 】

It is emphasized that a generalized relationship can be used to predict the ionic nitrogen concentration (i.e., sum of ammonium NH₄⁺, nitrite NO₂⁻ and nitrate NO₃⁻) of the scrubbing liquid in a biotrickling filter treating ammonia emissions by measuring the electrical conductivity (EC) of the water directly. From measurements carried out on different water samples from six biotrickling filters in operation in pig husbandries, the generalized relationship is: Σ([NH₄⁺]+[NO₂⁻]+[NO₃⁻]) _{g N/L} = 0.22 EC _mS/cm. This equation is valid provided the fresh water feeding the biotrickling filter has a low electrical conductivity (<1 mS cm⁻¹). Moreover, since ammonium, nitrite and nitrate ions are the ultra-majority ions in the liquid phase, the balance between NH₄⁺ and (NO₂⁻ + NO₃⁻) was confirmed, and consequently the relationship NH₄⁺ = 0.11 EC _mS/cm can also be applied to determine the ammonium concentration from the EC. As a result, EC measurement could be applied extensively to monitor operating biotrickling filters worldwide and used to determine ammonia mass transfer in real time, keeping in mind that the accuracy of the generalized relationship is ±20%.

【 授权许可】

Unknown