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Xiao T, Wang H, Wang X, Wu H, Yuan S, Dai X, Dong B. New strategy of drinking water sludge as conditioner to enhance waste activated sludge dewaterability: Collaborative disposal. WATER RESEARCH 2023; 233:119761. [PMID: 36841166 DOI: 10.1016/j.watres.2023.119761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 01/28/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Drinking water sludge (DWS) and waste activated sludge (WAS) are usually treated separately. With the continuous deepening understanding of the characteristics of two types sludge, the research and application of the collaborative disposal is worth considering. The heated modification DWS (HDWS) rich in inorganic matter and aluminum (Al2O3) can be used as a conditioner to enhance WAS dewaterability using its properties with physical skeleton and chemically catalyzed ozone (O3). The results showed that the minimum values of capillary water time (CST) and specific resistance filtration (SRF) for WAS were 20.9±2.40 s and 1.07±0.19×1013 m/kg at pH=4, O3 dosage=60 mg/g VS and HDWS dosage=700 mg/g VS, corresponding to the reduction of sludge cake water content (Wc) to 60.37±0.97 %. The mechanism of HDWS+O3 enhanced WAS dewaterability was systematically elucidated through pyridine-infrared analysis and density functional theory (DFT) calculations. The surface of Al2O3 in HDWS had more Lewis acidic sites, and the oxygen atoms of O3 combined with Al atoms to form Al-O bonds and undergo electron transfer, while O3 molecules dissociated to produce more hydroxyl radicals (·OH). With the oxidation of ·OH, the extra-microcolony/cellular polymers (EMPS/ECPS) structure were destroyed and became looser, promoting the conversion of internal moisture to free moisture. Zeta potential tended to zero, particle size increased, and the surface was more hydrophobic. Correlation analysis revealed that the component content, protein (PN) secondary structure and molecular weight (MW) in ECPS were positively and more strongly correlated with the sludge dewaterability compared to EMPS. The discovery of HDWS+O3 applied to effectively enhance WAS dewaterability provided an inspiring perspective on the emerging DWS and WAS co-processing disposition.
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Affiliation(s)
- Tingting Xiao
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Hui Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xiankai Wang
- YANGTZE Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China
| | - Haibin Wu
- YANGTZE Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China
| | - Shijie Yuan
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Bin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; YANGTZE Eco-Environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China.
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Kulandaivelu J, Choi PM, Shrestha S, Li X, Song Y, Li J, Sharma K, Yuan Z, Mueller JF, Wang C, Jiang G. Assessing the removal of organic micropollutants from wastewater by discharging drinking water sludge to sewers. WATER RESEARCH 2020; 181:115945. [PMID: 32502752 DOI: 10.1016/j.watres.2020.115945] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
Discharging drinking water treatment sludge (DWTS) to sewers could be an efficient waste management strategy with the potential to replace chemical dosing for pollutant control. This study for the first time investigated the fate of 28 different organic micropollutants (MPs) due to the dosing of iron-rich and aluminum-rich DWTS in a pilot rising main sewer. Nine MPs had an initial rapid removal within 1-hr (i.e., 10-80%) due to Fe-DWTS dosing. The formation of FeS particles due to Fe-DWTS dosing was responsible for the removal of dissolved sulfides (80% reduction comparing to control sewer). Further particle characterization using SEM-EDS, XRD and ATR-FTIR confirmed that FeS particles formation played an important role in the removal of MPs from wastewater. Adsorption of MPs onto the FeS particles was likely the possible mechanism for their rapid removal. In comparison to iron-rich DWTS, aluminum-rich DWTS had very limited beneficial effects in removing MPs from wastewater. The degradability of degradable MPs, including caffeine, paraxanthine, paracetamol, metformin, cyclamate, cephalexin, and MIAA were not affected by the DWTS dosing. Some non-degradable MPs, including cotinine, hydroxycotinine, tramadol, gabapentin, desvenlafaxine, hydrochlorothiazide, carbamazepine, fluconazole, sulfamethoxazole, acesulfame, saccharin and sucralose were also not impacted by the DWTS dosing. This study systematically assessed the additional benefits of discharging Fe-DWTS to the sewer network i.e., the removal of MPs from the liquid phase thereby reducing its load to the treatment plant. The results corroborate the discharge of Fe-rich DWTS in sewers as an effective and beneficial way of managing the waste by-product.
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Affiliation(s)
| | - Phil M Choi
- Queensland Alliance for Environmental Health Sciences, The University of Queensland, Woolloongabba, Queensland, 4102, Australia
| | - Sohan Shrestha
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Xuan Li
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Yarong Song
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Jiaying Li
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Keshab Sharma
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Zhiguo Yuan
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Jochen F Mueller
- Queensland Alliance for Environmental Health Sciences, The University of Queensland, Woolloongabba, Queensland, 4102, Australia
| | - Chengduan Wang
- Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Sichuan, China
| | - Guangming Jiang
- Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland, 4072, Australia; Department of Chemistry and Chemical Engineering, Sichuan University of Arts and Science, Sichuan, China; School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia.
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Wu J, Su T, Jiang Y, Xie X, Qin Z, Ji H. Catalytic ozonation of cinnamaldehyde to benzaldehyde over CaO: Experiments and intrinsic kinetics. AIChE J 2017. [DOI: 10.1002/aic.15773] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jianfeng Wu
- School of Chemistry and Chemical Engineering; Guangxi University; Nanning 530004 P.R. China
| | - Tongming Su
- School of Chemistry and Chemical Engineering; Guangxi University; Nanning 530004 P.R. China
| | - Yuexiu Jiang
- School of Chemistry and Chemical Engineering; Guangxi University; Nanning 530004 P.R. China
| | - Xinling Xie
- School of Chemistry and Chemical Engineering; Guangxi University; Nanning 530004 P.R. China
| | - Zuzeng Qin
- School of Chemistry and Chemical Engineering; Guangxi University; Nanning 530004 P.R. China
| | - Hongbing Ji
- School of Chemistry and Chemical Engineering; Guangxi University; Nanning 530004 P.R. China
- School of Chemistry; Sun Yat-sen University; Guangzhou 510275 P.R. China
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Wen G, Pan ZH, Ma J, Liu ZQ, Zhao L, Li JJ. Reuse of sewage sludge as a catalyst in ozonation--efficiency for the removal of oxalic acid and the control of bromate formation. JOURNAL OF HAZARDOUS MATERIALS 2012; 239-240:381-388. [PMID: 23021317 DOI: 10.1016/j.jhazmat.2012.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 09/02/2012] [Accepted: 09/09/2012] [Indexed: 06/01/2023]
Abstract
Sewage derived sludge is produced with an annual amount increase of 2% all over the world and it is an urgent issue to be addressed by human being. In the present study, sludge was converted into sludge-based catalyst (SBC) with ZnCl2 as activation agent and characterized by several methods (e.g., scanning electron microscope, X-ray photoelectron spectroscope and Fourier transform infrared spectroscope). Then it was used as a catalyst to enhance the removal of refractory organic matter, oxalic acid, and to control the formation of bromate (BrO3-) in bench semi-continuous ozonation experiments. The effects of various operating parameters on the control of BrO3- formation were investigated. Furthermore, the mechanism for the enhancement of organic matter removal and the control of BrO3- formation was discussed as well. Results indicate that the combination of SBC with ozone shows a strong synergistic effect, resulting in a notable improvement on oxalic acid removal. A crucial surface reaction mechanism for the enhancement of organic matter removal is proposed on the basis of negative effect of higher pH and no inhibition effect of tert-butanol. The control for BrO3- formation was demonstrated and the reason for its control in the process of O3/SBC is the combined effect of SBC reductive properties, ozone exposure decrease and hydrogen peroxide concentration increase.
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Affiliation(s)
- Gang Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China
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Xu GR, Zou JL, Li GB. Ceramsite obtained from water and wastewater sludge and its characteristics affected by (Fe(2)O(3)+CaO+MgO)/(SiO(2)+Al(2)O(3)). WATER RESEARCH 2009; 43:2885-2893. [PMID: 19427014 DOI: 10.1016/j.watres.2009.03.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 03/27/2009] [Accepted: 03/27/2009] [Indexed: 05/27/2023]
Abstract
To control and optimize the process for making ceramsite from wastewater treatment sludge (WWTS) and drinking-water treatment one (DWTS), the effect of mass ratios of (Fe(2)O(3)+CaO+MgO)/(SiO(2)+Al(2)O(3)) (defined as F/SA ratios); SiO(2):Al(2)O(3) and Fe(2)O(3):CaO:MgO (under the condition of fixed F/SA ratio) on the characteristics of ceramsite were investigated. It was found that the optimal F/SA ratios for making ceramsite range 0.175-0.45. Na-Ca feldspars and amorphous phases increase in ceramsite as F/SA ratios increase. Ceramsite with porous surfaces, expanded structures, and complex crystalline phases can be obtained at 0.275</=F/SA</=0.45, which accordingly cause the decrease in compressive strength. Higher strength of ceramsite with lower porosity can be obtained at 0.175</=F/SA<0.275, and under the condition of F/SA ratio=0.275, the raw materials can produce ceramsite with desired physical properties at 18.2:35</=SiO(2):Al(2)O(3)</=45:10.2 and 10:2.7:1.4</=Fe(2)O(3):CaO:MgO</=5.3:6:1.6. Ceramsite with higher compressive strength and lower porosity can be obtained at SiO(2):Al(2)O(3)>27.2:15.8 and Fe(2)O(3):CaO:MgO>6:3.5:1.8. Results indicate that F/SA ratios could be used as an important parameter to control the production process of ceramsite with desired physicochemical properties and resolve the disposal problems of residual sludges.
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Affiliation(s)
- G R Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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