Comparison of a novel polytitanium chloride coagulant with polyaluminium chloride: Coagulation performance and floc characteristics

Zhao, Yilu; Phuntsho, Sherub; Bao, Gao; Yang, Yanzhao; Kim, J.-H.; Shon, Ho Kyong

doi:10.1016/j.jenvman.2014.09.023

Cited by 57 publications

(15 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The removal e ciency was highest at pH of 4. A similar result was reported by Zhao et al [45] on the effect of pH on coagulation, using ferric based coagulant in yellow river water treatment. Also, Sun et al [46] reported best removal e ciency within the same acidic region.…”

Section: Effect Of Ph On Coagulation E Ciencysupporting

confidence: 87%

Optimal Conditions of Paint Wastewater Coagulation With Gastropod Shell Conchiolin Using Response Surface Design and Artificial Neural Network-Genetic Algorithm

Ejimofor

Ezemagu

Menkiti

et al. 2022

Preprint

View full text Add to dashboard Cite

The potential of gastropod shell conchiolin (GSC) (a waste product of the deprotenization stage of chitosan production) as one of the alternatives to chemical coagulants has been explored for treatment of paint industrial wastewater (PW). The accuracy of response surface design (RSD) and the precision of artificial intelligence (AI) in predicting and optimizing the process conditions were harnessed in raising experimental design matrix and response optimization, respectively for the bench scale jar test coagulation experiment. PW was characterized using American public health association (APHA) standard methods. Extraction of conchiolin was done via alkaline extraction method. PW contains 2098mg/l total suspended solid (TSS) above discharge limit (1905mg/l). Fourier transform infrared (FTIR) spectrum of GSC revealed a broad N–H wagging band at 750 – 650 cm−1 indicating the presence of secondary amine linked to the presence of protein. Turbidity removal from PW via one factor at a time (OFAT) was found to be a function of pH, GSC dosage, temperature and time. Artificial neural network (ANN) response prediction shows 92% correlation with the response surface design (RSD) experimental result. The optimal conditions obtained via genetic algorithm (GA) for the response optimization at the best pH of 4 indicate optimal turbidity removal of 98% at GSC dosage, time and temperature of 4 g, 20 min and 45oC, respectively.

show abstract

Section: Effect Of Ph On Coagulation E Ciencysupporting

confidence: 87%

Optimal Conditions of Paint Wastewater Coagulation With Gastropod Shell Conchiolin Using Response Surface Design and Artificial Neural Network-Genetic Algorithm

Ejimofor

Ezemagu

Menkiti

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…[P] 6 mg/L; the efficiencies of P removal varied from 29.8% to 99.7% (Figure 3) /L, the pH f at 99% P removal was 5.6 for 2 mg P/L and 4.1 for 4 mg P/L, and at 150 mg CaCO 3 /L, the pH f at 99% P removal was 5.3 for 4 mg P/L and 3.2 for 6 mg P/L. Large amounts of H þ might be released during the Ti hydrolysis process, thereby leading to low effluent 3.2 pH 5.6 (Shon et al, 2007;Zhao et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Phosphorus Removal Characteristics of Titanium Salts Compared with Aluminum Salt

Jeon

Kim

Ahn

2017

Water Environment Research

View full text Add to dashboard Cite

This study evaluates the efficacy of titanium tetrachloride (TiCl4) and titanium sulfate [Ti(SO4)2] on phosphorus (P) removal in synthetic wastewater compared with aluminum sulfate [Al2(SO4)3]. Jar test experiments were performed at various chemical doses and initial pH (pHi) levels to determine the conditions at which P removal was most efficient. The doses with 99% P removal were 0.31 to 0.34 mM for TiCl4, 0.15 mM for Ti(SO4)2, and 0.19 mM for Al2(SO4)3 as Al at 2 mg P/L, 100 mg CaCO3/L, and pHi = 7.0 to 8.0. The optimum pHi was 7 for TiCl4, 5.5 for Ti(SO4)2, and 7 for Al2(SO4)3. The P-removal efficiencies were Ti(SO4)2 > Al2(SO4)3 > TiCl4 at pHi 5.5, and TiCl4 ≈ Al2(SO4)3 > Ti(SO4)2 at pHi 7 and 8.5. P-removal ability of TiCl4 decreased as alkalinity increased. Quadratic models successfully approximated the response surface for P removal efficiency with simultaneous changes in pHi and chemical concentrations [TiCl4 and Al2(SO4)3].

show abstract

“…Previous studies have reported types of water and wastewater treatments that contain high NOM using standalone coagulation, with about 60-70% removal of hydrophobic fraction of NOM and 30-40% of hydrophilic fractions [5][6][7][8]. Another work also reported performance of adsorption for NOM removals of up to 98% that were obtained by powdered activated carbon (PAC) with an optimum dosage 500 mg/L [9], which can remove organic materials with a molecular weight (MW) ranging from 0.5-1 to 1-3 kDa.…”

Section: Introductionmentioning

confidence: 99%

Combination of Coagulation, Adsorption, and Ultrafiltration Processes for Organic Matter Removal from Peat Water

et al. 2021

View full text Add to dashboard Cite

The high content of natural organic matter (NOM) is one of the challenging characteristics of peat water. It is also highly contaminated and contributes to some water-borne diseases. Before being used for potable purposes, peat water must undergo a series of treatments, particularly for NOM removal. This study investigated the effect of coagulation using aluminum sulfate coagulant and adsorption using powdered activated carbon (PAC) as a pretreatment of ultrafiltration (UF) for removal of NOM from actual peat water. After preparation and characterization of polysulfone (Psf)-based membrane, the system’s performance was evaluated using actual peat water, particularly on NOM removal and the UF performances. The coagulation and adsorption tests were done under variable dosings. Results show that pretreatment through coagulation–adsorption successfully removed most of the NOM. As such, the UF fouling propensity of the pretreated peat water was substantially lowered. The optimum aluminum sulfate dosing of 175 mg/L as the first pretreatment stage removed up to 75–78% NOM. Further treatment using the PAC-based adsorption process further increased 92–96% NOM removals at an optimum PAC dosing of 120 mg/L. The final UF-PSf treatment reached NOM removals of 95% with high filtration fluxes of up to 92.4 L/(m2.h). The combination of three treatment stages showed enhanced UF performance thanks to partial pre-removal of NOM that otherwise might cause severe membrane fouling.

show abstract

Comparison of a novel polytitanium chloride coagulant with polyaluminium chloride: Coagulation performance and floc characteristics

Cited by 57 publications

References 40 publications

Optimal Conditions of Paint Wastewater Coagulation With Gastropod Shell Conchiolin Using Response Surface Design and Artificial Neural Network-Genetic Algorithm

Optimal Conditions of Paint Wastewater Coagulation With Gastropod Shell Conchiolin Using Response Surface Design and Artificial Neural Network-Genetic Algorithm

Phosphorus Removal Characteristics of Titanium Salts Compared with Aluminum Salt

Combination of Coagulation, Adsorption, and Ultrafiltration Processes for Organic Matter Removal from Peat Water

Contact Info

Product

Resources

About