Evaluation of membrane cake fouling mechanism to estimate design parameters of a submerged AnMBR treating high strength industrial wastewater

Gautam, Rajneesh Kumar; Kamilya, Tuhin; Verma, Saumya; Muthukumaran, Shobha; Jegatheesan, Veeriah; Navaratna, Dimuth

doi:10.1016/j.jenvman.2021.113867

Cited by 7 publications

(3 citation statements)

References 45 publications

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“…Due to high concentrations of organic matter, extracellular polymeric substances (EPS) and soluble microbial products (SMP) play a crucial role in membrane fouling [18,19]. Some authors have modeled the membrane fouling mechanisms in a submerged AnMBR in response to the SMP and EPS concentrations [20,21]. The critical limitation of these models is the use of single substrates (e.g., hexoses), which might not represent actual wastewater and could lead to idealistic results in hydrogen generation.…”

Section: Introductionmentioning

confidence: 99%

“…A summary of the main model structures in the literature used for modeling AnMBR is shown in Table 1. Modeling structures often do not include biochemical and physical processes together, except those modeling membrane cake fouling due to EPS and SMP, which are limited to one substrate and focus on the EPS [21,25]. Elucidate the membrane fouling due to EPS in SAnMBR and its impact in membrane durability.…”

Section: Introductionmentioning

confidence: 99%

“…Elucidate the membrane fouling due to EPS in SAnMBR and its impact in membrane durability. [21,25] In this study, we developed a mechanistic model for hydrogen production in submerged AnMBR treating high-strength wastewater. The model builds on the ADM1 model and incorporates physical and biochemical processes to describe membrane fouling due to a multi-substrate influent (i.e., carbohydrates, proteins, and fats) and their impact on hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

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A Mechanistic Model for Hydrogen Production in an AnMBR Treating High Strength Wastewater

Vera,

Feijoo,

Prieto

2023

Membranes

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In the global race to produce green hydrogen, wastewater-to-H2 is a sustainable alternative that remains unexploited. Efficient technologies for wastewater-to-H2 are still in their developmental stages, and urgent process intensification is required. In our study, a mechanistic model was developed to characterize hydrogen production in an AnMBR treating high-strength wastewater (COD > 1000 mg/L). Two aspects differentiate our model from existing literature: First, the model input is a multi-substrate wastewater that includes fractions of proteins, carbohydrates, and lipids. Second, the model integrates the ADM1 model with physical/biochemical processes that affect membrane performance (e.g., membrane fouling). The model includes mass balances of 27 variables in a transient state, where metabolites, extracellular polymeric substances, soluble microbial products, and surface membrane density were included. Model results showed the hydrogen production rate was higher when treating amino acids and sugar-rich influents, which is strongly related to higher EPS generation during the digestion of these metabolites. The highest H2 production rate for amino acid-rich influents was 6.1 LH2/L-d; for sugar-rich influents was 5.9 LH2/L-d; and for lipid-rich influents was 0.7 LH2/L-d. Modeled membrane fouling and backwashing cycles showed extreme behaviors for amino- and fatty-acid-rich substrates. Our model helps to identify operational constraints for H2 production in AnMBRs, providing a valuable tool for the design of fermentative/anaerobic MBR systems toward energy recovery.

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