Industrial flue gas desulfurization waste may offer an opportunity to facilitate SANI® application for significant sludge minimization in freshwater wastewater treatment

2013 ◽  
Vol 67 (12) ◽  
pp. 2822-2826 ◽  
Author(s):  
J. Qian ◽  
F. Jiang ◽  
H. K. Chui ◽  
Mark C. M. van Loosdrecht ◽  
G. H. Chen
Keyword(s):  
Wastewater Treatment ◽  
Flue Gas ◽  
Industrial Effluent ◽  
Flue Gas Desulfurization ◽  
Synthetic Wastewater ◽  
Autotrophic Denitrification ◽  
Carbon And Nitrogen ◽  
Sludge Minimization ◽  
Denitrification Reactor ◽  
Set Up

This paper reports an exploratory study on the use of a sulfite-rich industrial effluent to enable the integration of a sulfite–sulfide–sulfate cycle to the conventional carbon and nitrogen cycles in wastewater treatment to achieve sludge minimization through the non-sludge-producing Sulfate reduction, Autotrophic denitrification and Nitrification Integrated (SANI) process. A laboratory-scale sulfite reduction reactor was set up for treating sulfite-rich synthetic wastewater simulating the wastewater from industrial flue gas desulfurization (FGD) units. The results indicated that the sulfite reduction reactor can be started up within 11 d, which was much faster than that using sulfate. Thiosulfate was found to be the major sulfite reduction intermediate, accounting for about 30% of the total reduced sulfur in the reactor effluent, which may enable additional footprint reduction of the autotrophic denitrification reactor in the SANI process. This study indicated that it was possible to make use of the FGD effluent for applying the FGD–SANI process in treating freshwater-based sewage.

Modelling Flue Gas Desulfurization Using Pyrolusite Pulp in a Jet Bubbling Reactor

2009 ◽  
Vol 610-613 ◽  
pp. 85-96 ◽  
Author(s):  
Jing Dong Zhao ◽  
Shi Jun Su ◽  
Nan Shan Ai ◽  
Xiao Fan Zhu
Keyword(s):  
Flue Gas ◽  
Ph Value ◽  
Scale Up ◽  
Absorption Efficiency ◽  
Flue Gas Desulfurization ◽  
Process Conditions ◽  
Gas Temperature ◽  
Transfer Coefficients ◽  
Set Up ◽  
So2 Absorption

A mathematical model for flue gas desulfurization using pyrolusite pulp in jet bubbling reactor (JBR) was described. Firstly, based on the concept of two stages mass balance with chemical reaction, two models were set up, for jet bubbling zone and rising bubble zone, respectively, according to the construction of JBR. The models consist of two coupling differential equations and were solved simultaneously by integral and separation of the variables. Then the SO2 absorption efficiency expression was developed, considering the great discrepancy existing between the gas-side mass transfer coefficients of the jet bubbling zone and gas bubble rising zone. The final expression associates SO2 absorption efficiency with process conditions and JBR structure parameters, which can give some instruction and guidance for the study of reactor operation process. Predicted results from the theoretical model, including effect of pH value of the pulp, flue gas temperature and inlet SO2 concentration of flue gas on SO2 absorption efficiency, were found to be in good agreement with experimental data obtained in a jet bubbling reactor. The model provides a basis for the process scale up and operating guide.

scholarly journals Limestone-Gypsum Wet Flue Gas Desulfurization Wastewater Treatment

2021 ◽  
Vol 651 (4) ◽  
pp. 042034
Author(s):  
Tingting Ni ◽  
Yunzhong Wang ◽  
Chenghui Huang ◽  
Dongsheng Jiang ◽  
Qingyu Liu
Keyword(s):  
Wastewater Treatment ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Desulfurization Wastewater

scholarly journals Wet flue gas desulfurization wastewater treatment with reclaimed water treatment plant sludge: a case study

2018 ◽  
Vol 78 (11) ◽  
pp. 2392-2403 ◽  
Author(s):  
Hong Chen ◽  
Yiyu Wang ◽  
Yanxiao Wei ◽  
Liang Peng ◽  
Bo Jiang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Flue Gas ◽  
Thermal Power ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Flue Gas Desulfurization ◽  
Hunan Province ◽  
Wastewater Treatment Process ◽  
Water Treatment Plant Sludge

Abstract To upgrade a wet flue gas desulfurization (FGD) wastewater treatment process in a typical thermal power plant (TPP) in Hunan province, China, a new concept for reusing polyaluminum chloride (PAC)-based water treatment plant sludge (WTPS) as a coagulant is proposed. Results show that, for an optimal WTPS dosage of 1,000 mg/L, the corresponding removal capacities for suspended solids (SS) and chemical oxygen demand (COD) from the practical FGD wastewater were 58.3% and 40.3%, respectively. Through an advanced treatment with a dosage of 50 mg/L of PAC, pH of 9, and stirring of 150 r/min for 60 s and 50 r/min for 15 min, the total removal efficiencies of SS, COD, and total cadmium (Cd) from the FGD wastewater were 93.7%, 88.8%, and 84.6%, respectively. Therefore, a new modification process (that involves mixing with WTPS – slag cleaner – neutralization – coagulation – sedimentation) was proposed. The proposed process is economically superior, and the average cost for the FGD wastewater treatment was only 1.08 USD/t. This could provide a cost-effective alternative process for upgrading FGD wastewater treatment facilities of TPPs.

scholarly journals Zinc and cadmium adsorption from wastewater using hydroxyapatite synthesized from flue gas desulfurization waste

2021 ◽  
Author(s):  
Sıla Kızıltas Demir ◽  
Nurcan Tugrul
Keyword(s):  
Heavy Metal ◽  
Adsorption Capacity ◽  
Metal Concentration ◽  
Flue Gas ◽  
Contact Time ◽  
Heavy Metal Concentration ◽  
Flue Gas Desulfurization ◽  
Synthetic Wastewater ◽  
Cadmium Adsorption ◽  
Adsorbent Dose

Abstract The purpose of this work is to produce an alternative cost-effective adsorbent to remove zinc and cadmium from wastewater using hydroxyapatite (HAP) synthesized with hydrothermal method from FGD (Flue gas desulfurization) waste generated by two different coal power plants. The effects of FGD type (Cayırhan and Orhaneli) and molar ratio (H3PO4/CaSO4) (0.6–4.79) on HAP synthesis were investigated. Afterwards effects of the adsorbent dose (1–2 g/L), heavy metal concentration (30, 40, 50 mg/L) and contact time (1, 2, 3, 4 h) on zinc and cadmium adsorption yield from synthetic wastewater using produced HAP were examined. FGD waste and synthesized FGD-HAP were characterized by X-Ray Diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FT-IR), Scanning Electron Microscope (SEM) and Brunauer-Emmett-Teller (BET) instruments. The zinc and cadmium concentration was studied by Inductively coupled plasma atomic emission spectroscopy (ICP-AES). Maximum zinc adsorption capacity of the Cayırhan FGD-HAP was 49.97 and 49.99 mg/L, Orhaneli FGD-HAP was 49.96 and 49.99 mg/L, for 1 g/L and 2 g/L adsorbent dose respectively, for 50 mg/L heavy metal concentration and 4 h contact time. Maximum cadmium adsorption capacity of the Cayırhan FGD-HAP was 39.98 and 39.99 mg/L, Orhaneli FGD-HAP was 40 and 39.99 mg/L, for 1 g/L and 2 g/L adsorbent dose respectively, for 40 mg/L heavy metal concentration and 4 h contact time. Adsorption yields were calculated between 98.53 and 100%. The adsorption data were well explained by second order kinetic model and the Freundlich isotherm model fits the equilibrium data. The adsorption results demonstrated that FGD's waste is an effective source to synthesis HAP which is used as an adsorbent for zinc and cadmium removal from wastewater due to high adsorption capacity.

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