A kinetic study of hydrogenotrophic denitrification

Experimental and modelling study of drinking water hydrogenotrophic denitrification in packed-bed reactors

“…Although there are several studies on hydrogenotrophic denitrification reported in the literature, only few of them use biological kinetic data to facilitate the design and operation of biological nitrogen removal plants [10,[13][14][15] and even less study the kinetics of the biofilm process in a hydrogenotrophic denitrifying reactor [16]. However, modelling of denitrifying biofilm reactors has been carried out by several authors in heterotrophic [17,18] and sulphur autotrophic [19,20] denitrification.…”

“…The novelty of the model is the diffusion of the dissolved components in a biofilm which grows according to the kinetics of substitutable substrates (nitrate and nitrite) with nitrate inhibition, which initially was used by Vasiliadou et al [14] for hydrogenotrophic denitrifying biomass in suspended growth reactors.…”

Nitrate removal from drinking water in a packed‐bed bioreactor coupled by a methanol‐based electrochemical gas generator

“…In an extensive review of the most researches in the field of hydrogenotrophic denitrification of drinking water, it has been shown that H 2 and CO 2 have been separately supplied with different methods such as pressurized cylinders which are not economical in actual scale [4,14,15,21,22]. At present, there are four hydrogen production categories: biological, chemical, electrochemical (water electrolysis; photoelectrochemical; halide electrolysis; H 2 S electrolysis), and thermal technologies [23].…”

A kinetic study on drinking water denitrification using a membrane bioreactor

“…The biological removal of nitrate can be affected by various factors: different types of external C sources [6,7], various types of micro-organisms [6,8], various operational parameters such as C/N ratios [2,9,10], temperature [3,[11][12][13], pH [3,11], dissolved oxygen [12,14,15], hydraulic retention time [16][17][18], nitrate and nitrite concentratios [11,19] and mixed liquor suspended solids [10,20]. In addition, nitrate removal highly depends on the substrate amount that influences the denitrification rate, denitrification yield, and the composition of the microflora [6,21].…”

“…Although, the most commonly used relation describing microbial growth is Monod kinetics [28][29][30] and the heterotrophic denitrification is usually assumed as being described by Monod expressions [19]. There are several factors next to the pH, temperature, and dissolved oxygen [12,31], that can affect microbial growth and kinetics: type of substrate [2,9], microbial population [13,32,33], type of water source [32].…”