Mathematical Modeling of Biological Selenium Removal from Flue Gas Desulfurization (FGD) Wastewater Treatment

2016 ◽  
Vol 2016 (11) ◽  
pp. 228-248 ◽  
Author(s):  
Mehran Andalib ◽  
Sara Arabi ◽  
Peter Dold ◽  
Christopher Bye
Keyword(s):  
Mathematical Modeling ◽  
Wastewater Treatment ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Selenium Removal

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.

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 Application of aluminum-based coagulants for improving efficiency of flue gas desulfurization wastewater treatment in coal – fired power plant

2019 ◽  
Vol 108 ◽  
pp. 02006
Author(s):  
Piotr Marcinowski ◽  
Jan Bogacki ◽  
Maciej Majewski ◽  
Jarosław Zawadzki ◽  
Sridhar Sivakumar
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Flue Gas ◽  
Power Plants ◽  
Oxygen Demand ◽  
Flue Gas Desulfurization ◽  
Treatment Processes ◽  
Metals Removal ◽  
Global Threat ◽  
Desulfurization Wastewater

Pollution released into the environment as the result of the combustion of energy fuels is a significant global threat. For instance, wastewater in coal–fired power plants is often heavily polluted by organic compounds, heavy metals and boron. Therefore, there is an urgent need for efficient flue gases and wastewater treatment. However, to be industrially implemented, the treatment processes have to be simultaneously effective and inexpensive. This research systematically studied the efficiency of inexpensive coagulation processes using aluminum-based coagulants applied to flue gas desulfurization (FGD) wastewater treatment. Additionally, the differences in the efficiency of total organic carbon (TOC) and chemical oxygen demand (COD) removal between sedimentation and coagulation processes were systematically studied. It was found that coagulation with the appropriate dose of PAX19XL coagulant achieved a satisfactory effect with significant boron removal and almost complete heavy metals removal. The polyelectrolyte use did not improve coagulation effectiveness and did not accelerate sludgesedimentation and volume decreasing. The detailed statistical analyses did not confirm the positive, pronounced effect of coagulation compared to sedimentation, although there were observed exceptions that should be considered separately. The results obtained suggest that inexpensive aluminum-based coagulants may be effective in improving the efficiency of flue gas desulfurization wastewater treatment in coal–fired power plants.

Optimization of a Wet Flue Gas Desulfurization Scrubber through Mathematical Modeling of Limestone Dissolution Experiments

2015 ◽  
Vol 54 (40) ◽  
pp. 9783-9797 ◽  
Author(s):  
Claudio Carletti ◽  
Cataldo De Blasio ◽  
Ermei Mäkilä ◽  
Jarno Salonen ◽  
Tapio Westerlund
Keyword(s):  
Mathematical Modeling ◽  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Limestone Dissolution

scholarly journals Reusing effluent of flue gas desulfurization wastewater treatment process as an economical calcium source for phosphorus removal

2017 ◽  
Vol 76 (6) ◽  
pp. 1429-1435 ◽  
Author(s):  
Weixiao Dou ◽  
Zhen Zhou ◽  
Jiongjiong Ye ◽  
Rongwei Huang ◽  
Lu-Man Jiang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Flue Gas ◽  
Ph Value ◽  
Chemical Precipitation ◽  
High Energy ◽  
Flue Gas Desulfurization ◽  
Wastewater Treatment Process ◽  
Capital Costs ◽  
Calcium Source ◽  
P Removal

Flue gas desulfurization (FGD) wastewater treatment by conventional neutralization, chemical precipitation and coagulation process removes most suspended solids and heavy metals, and provides an effluent rich in calcium, alkalinity and chloride, which obstructs its reclamation and reuse but is in favor of phosphorus (P) precipitation. The goals of this study were to investigate feasibility of reusing FGD effluent as a calcium source for P removal from P-rich wastewater. Results revealed that increasing the volumetric ratio between FGD effluent and P-rich wastewater achieved higher pH value and Ca/P ratio, and thus enhanced P removal efficiency to 94.3% at the ratio of 40%. X-ray diffraction and scanning electron microscope analysis of harvested precipitates showed that increasing pH from 8 to 10 induced the conversion of hydroxyapatite to tri-calcium phosphate, and then to whitlockite. This study demonstrated that for reusing FGD effluent for P removal was highly feasible, both technically and economically. This process not only saves the cost of precipitants for P removal, but also provides an economical alternative for current zero liquid discharge technology for FGD wastewater, which requires high energy consumption and capital costs.

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