The effectiveness of coagulation for water reclamation from a wastewater treatment plant that has a long hydraulic and sludge retention times: A case study

Cui, Xiaochun; Zhou, Dandan; Wang, Fan; Huo, Mingxin; Crittenden, John C.; Yu, Zhisen; Ju, Pengfei; Wang, Yang

doi:10.1016/j.chemosphere.2016.05.009

Cited by 41 publications

(13 citation statements)

References 40 publications

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“…The concentrations of most parameters in the treated effluent decreased significantly, such as total COD (59%), TKN and NH 4 + -N (29%), TP (90%), TSS (98%), and Ca 2+ (51%) ( Table 3). However, the concentration of soluble COD was only reduced by about 10% indicating that the coagulation was not as effective for the removal of soluble proteins contained in the sample [55]. The total recovery rate for the crude protein content from the sample after preliminary sedimentation and chitosan coagulation was up to 29%.…”

Section: Coagulation By Chitosan (Experiments 1)mentioning

confidence: 93%

Coagulation of Chitin Production Wastewater from Shrimp Scraps with By-Product Chitosan and Chemical Coagulants

et al. 2020

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Chitin production wastewater contains nutrient-rich organic and mineral contents. Coagulation of the wastewater with a natural coagulant such as by-product chitosan would be an economical and environmentally friendly method of treatment. This study investigated the treatment efficiencies of a preliminary sedimentation process followed by coagulation. The removal efficiencies for wastewater parameters were evaluated and compared for coagulants including by-product chitosan, polyaluminum chloride, and polyacryamide. The evaluation was based on the removal of wastewater turbidity and other criteria, including tCOD, sCOD, TKN, NH4+–N, TP, TSS, calcium, and crude protein. The results showed that the preliminary sedimentation (before coagulation) can remove over 80% of turbidity and more than 93% of TSS at pH 4 in 30 min. At optimal conditions, when the ratio of crude protein and calcium was 4.95, by-product chitosan dose of 77.5 mg·L−1 and pH = 8.3, the wastewater characteristics changes were tCOD 23%, sCOD 32%, TKN and ammonium 25%, TP 90%, TSS 84%, Ca2+ 29%, and crude protein 25%. The residue recovered through coagulation consists of up to 55 mg·g−1 crude protein, which is used for animal feed or crop fertilizer.

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Section: Coagulation By Chitosan (Experiments 1)mentioning

confidence: 93%

Coagulation of Chitin Production Wastewater from Shrimp Scraps with By-Product Chitosan and Chemical Coagulants

et al. 2020

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“…Figure 6 schematically summarizes some of the water sources and water uses that can be interlinked through systems and unit operations designed to provide fit-for-purpose water, either at large scale, or for "point-of-use" operations. [69][70][71][72] This figure is organized to reflect the anticipated need for modularity in the purification strategies used. Depending upon the water source and the intended use, not all technologies may be needed for water purification, especially if high impurity levels can be tolerated in the end use.…”

Section: Materials Technologies and Unit Operations Associated Withmentioning

confidence: 99%

Challenges and opportunities at the nexus of energy, water, and food: A perspective from the southwest United States

Armstrong

Shallcross

Ogden

et al. 2018

MRS Energy & Sustainability

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“…Aluminum salt coagulants are commonly used in wastewater reclamation on account of their high efficiency and low cost [9]. However, aluminum ions remain in the effluent, with observed concentrations within the range of 0.54-2.12 mg/L [10]. In previous work, Cui (2016) investigated the role which aluminum plays in wastewater reclaiming [10].…”

Section: Introductionmentioning

confidence: 99%

“…However, aluminum ions remain in the effluent, with observed concentrations within the range of 0.54-2.12 mg/L [10]. In previous work, Cui (2016) investigated the role which aluminum plays in wastewater reclaiming [10]. In another work, Cui (2018) reported that residual Al could stimulate biofilm formation, thus changing the EPS characteristics when combined with proteins [11].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Residual Coagulant Al on the Biofilm EPS and Membrane Fouling Potential in Wastewater Reclamation

Sun

Zhao

Cui

et al. 2020

Water

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Biofouling is inevitable in wastewater reclamation when using membrane technology. In particular, the extracellular polymeric substances (EPS) from biofilm is a major contributor to biofouling. Coagulation is critical in the process of reusing wastewater before membrane treatment, and residual coagulants (e.g., Al salts) are able to alter the characteristics of the biofilm EPS. However, the distribution of residual Al across varying biofilm EPS fractions and its effect on the membrane fouling potential resulting from biofilm EPS remains unclear. We found that 34% of the residual Al was present in the soluble EPS (S-EPS), 26% in the loosely bound EPS (LB-EPS) and 40% in the tightly bound EPS (TB-EPS). Moreover, compared with the control groups, the residual Al in biofilm induced more biofilm formation and more EPS formation. Al reduced the zeta potential and increased the hydrophobicity of the EPS. These changes induced a significant rise in the membrane fouling potential of S-EPS and LB-EPS. This work provides coagulation support for wastewater reclamation using membrane technology.

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The effectiveness of coagulation for water reclamation from a wastewater treatment plant that has a long hydraulic and sludge retention times: A case study

Cited by 41 publications

References 40 publications

Coagulation of Chitin Production Wastewater from Shrimp Scraps with By-Product Chitosan and Chemical Coagulants

Coagulation of Chitin Production Wastewater from Shrimp Scraps with By-Product Chitosan and Chemical Coagulants

Challenges and opportunities at the nexus of energy, water, and food: A perspective from the southwest United States

The Influence of Residual Coagulant Al on the Biofilm EPS and Membrane Fouling Potential in Wastewater Reclamation

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