Impact of isolated dissolved organic fractions from seawater on biofouling in reverse osmosis (RO) desalination process

Avaliação de alumina e carvão ativado conjugados com nanopartículas de prata como pré-tratamentos para nanofiltração visando à redução da incrustação

“…O biofilme obtido com a amostra de água sem pré-tratamento foi o que apresentou maior concentração de EPS, tanto no que se refere a carboidrato quanto proteína. Além disso, nesse caso, nota-se maior concentração de proteínas do que de carboidratos, similar ao que foi encontrado por outros autores (YIN et al, 2020). Todos os pré-tratamentos foram eficientes na redução das EPS, o que contribui para a mitigação da incrustação da membrana de NF, especialmente o pré-tratamento conjugado.…”

Seawater Reverse Osmosis Desalination: Assessment and Pre-treatment of Fouling and Scaling

“…But due to the inability of these strains to assimilate all available nutrient for growth, the use of an indigenous microbial consortium is encouraged to diversify nutrient assimilation range compared to pure strain(s). In seawater, AOC accounts for 30% of low molecular weight compounds of DOC, which played a significant role in biofouling by enhancing microbial growth and thus boosted the production of soluble microbial products (SMPs) and extracellular polymeric substances (EPS) (Yin, et al, 2020). As reported for bacterial growth in seawater, the assimilable organic carbon content ranges from about 50 to 400 µgC/L (Javier, et al, 2020).…”

Effective removal of proteins using carbon‐based nanoadsorbent: relevancy to the application of membrane‐driven pre‐water treatment

“…The pH was adjusted using various buffers in the ranges of 3.0-0.0 such as citrate buffer (3.0-5.0) and phosphate buffer (6.0-8.0). Parameters including contact time (1-300 min), pH (3)(4)(5)(6)(7)(8)(9), temperature (20, 25, 30 and 35°C), NGO concentration as adsorbent (0.2-1.0 mg mL −1 ), adsorbate concentration (i.e. protein) (0.2-1.0 mg mL −1 ) were studied during batch adsorption.…”

“…Thus, membrane biofouling generally necessitates higher chemical usage for cleaning, thereby resulting in a shortening of the membrane life as well as increasing treatment cost. 4 Moreover, the degradation of proteins further enhances exertion during membrane treatment as its byproducts increase viscosity and froth formation. [5][6][7] Membrane-based treatment is a widely accepted technique for wastewater treatment for ascertaining water quality and for resource recovery from wastewater (e.g.…”