Optimization of the coagulation-flocculation process for pulp mill wastewater treatment using a combination of uniform design and response surface methodology

Application of several pretreatment technologies to a wastewater effluent of a petrochemical industry finally treated with reverse osmosis

“…Aluminum Chloride was used in a pulp mill industry by Wang et al [11], Aluminum and Ferric Sulfate in a petroleum refinery by Santo et al [10], Polyaluminum Chloride in the treatment of distillery wastewaters (vinasses) by Rennola et al [12] and other inorganic coagulants in the treatment of municipal wastewater [14][15][16].…”

“…Santo et al [10] used similar flocculants with a petroleum refinery effluent, such as NALCO 71408, a high molecular weight polyacrylamide. Other authors used other anionic and cationic flocculants [8,11,12,14].…”

“…In this research, metal salts were used because of their high effectiveness and low cost [7,8,[10][11][12][13][14][15][16]. Other authors used organic coagulants, such as natural gums, in the pretreatment of petrochemical wastewater [8].…”

Statistical optimization of process parameters for the simultaneous adsorption of Cr(VI) and phenol onto Fe-treated tea waste biomass

“…Precipitation/coagulation (Wang et al 2011), chemical oxidation (Dittert et al 2014), biodegradation (Annadurai et al 2008), adsorption (Jain et al 2011), ion exchange (Cavaco et al 2007), membrane processing (Lin et al 2014), electrolytic methods (Hamdan and El-Naas 2014), carbon nanomaterial (Salam et al 2012), etc. are some important methods which have been used to remove the heavy metal ion and phenolic contents together.…”

Optimization of H2O2 dosage in microwave-H2O2 process for sludge pretreatment with uniform design method

“…Compared with the traditional orthogonal design method, the uniform design method is capable of selecting experimental points uniformly in the experimental region and highly representative in the experimental domain, so that higher reliability can be achieved with the same number of tests (Li and Hu, 2005;Zhao, 2006). As an efficient way for optimizing various processes, the uniform design method is widely used in materials preparation, membrane fabrication and wastewater treatment (Leung et al, 2000;Li et al, 2003;Wang et al, 2012). Therefore, the purpose of this study was to further optimize the H 2 O 2 dosage in the MW-H 2 O 2 process with the uniform design method, by investigating the effects of pH and H 2 O 2 dosage on both H 2 O 2 residues and releases of organic matter, nitrogen, and phosphorus from sludge pretreated by the MW-H 2 O 2 process.…”