Characterization of synthetic and activated sludge and conditioning with cationic polyelectrolytes
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Cited by (34)
Treatment of high turbidity mine drainage with iron-based hybrid flocculants: Synthesis process and mechanism, and its interfacial flocculation mechanism
2023, Separation and Purification TechnologySewage sludge electro-dewatering
2020, Advanced Water Treatment: Electrochemical MethodsDrinking water treatment by stepwise flocculation using polysilicate aluminum magnesium and cationic polyacrylamide
2019, Journal of Environmental Chemical EngineeringCitation Excerpt :Traditional flocculants, such as polyaluminum chloride (PAC) or its polymer, are the most widely used inorganic coagulants in water treatment plants due to their low price, low toxicity, and abundance. However, these flocculants have shortcomings, such as the formation of small flocs, the requirement of high dosages, common removal efficiencies, and easily affected by water quality and pH conditions [5–7]. The synthetic organic polymeric flocculants, such as polyethyleneimine, polyvinylpyridinium salt, and polyacrylamide and its derivatives, have been reported in the flocculation treatment [8,9].
Influence of polyelectrolyte architecture on the electrokinetics and dewaterability of industrial membrane bioreactor activated sludge
2019, Journal of Environmental ManagementCitation Excerpt :o Rheological impacts (Vachoud et al., 2017; Hsu and Nacu, 2004). Organic flocculants studied and used for activated sludge conditioning have predominantly been cationic in nature (Pambou et al., 2016; Liu and Mavarro, 2017; Zhou et al., 2017; Fu et al., 2009; Phong et al., 2008; Bi et al., 2015; Zemmouri et al., 2015; Yigit et al., 2010) and with polyacrylamide (PAM) polymers featuring prominently (Liu and Mavarro, 2017; Zhou et al., 2017; Bi et al., 2015). This is a consequence of the inherent affinity of the positively-charged ionogenic for the negatively charged suspended particles, thereby affecting charge neutralization of the latter (Shaikh et al., 2018a).
Cationic nanocelluloses in dewatering of municipal activated sludge
2017, Journal of Environmental Chemical EngineeringCitation Excerpt :Conditioning increases particle sizes by combining small, colloidal particles into larger, cohesive aggregates. This chemical conditioning is done using inorganic, multivalent cationic coagulants such as aluminum (Al) or iron (Fe) salts or with synthetic polyelectrolytes such as synthetic polyacrylamides (PAM) [6–11]. However, PAM and its derivatives pose a number of environmental problems, as the intermediate products of their degradation are hazardous and their monomers are highly toxic.