WEBJul 10, 2020 · Zero emission of wastewater from coalfired power plants (CFPPs) is one of the pathways for cleaner electricity production. It is expected that lowcost and reliable zero liquid discharge (ZLD) of flue gas desulphurization (FGD) wastewater will be achieved by applying the forced circulation multieffect distillation and crystallization (FCMEDC) .
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WEBJan 1, 2017 · After treatment, the concentration of phenols in the wastewater was reduced to 450 mg/L, suitable for connection with a biochemical treatment process (Yu et al., 2010). In this process the cost for removing phenol, ammonia and other pollutants is the high energy consumption for distillation and stripper process (Feng et al., 2009).
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WEBJul 1, 2023 · Section snippets Source of inoculum and real wastewater. Coal chemical wastewater (CCW) and excess sludge used for the operation of A/O bioprocess in this study were collected from a fullscale A 2 /O process in Sinopec Nanjing chemical industries Co., Ltd in China. The effluent from the first anaerobic unit of fullscale A 2 /O process was .
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WEBOct 9, 2023 · An improved alytic wet oxidation method for the disposal of excess activated sludge from a coal chemical wastewater treatment process by using the prepared CuCe/γAl2O3 alyst was reported. The effects of alyst dosage, reaction temperature and time, and initial oxygen pressure on the degradation of the sludge were .
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WEBTo analyze the bottleneck of industrial coalgasifiion wastewater treatment process,the full process modeling and flowsheeting were completed based on the further development of Aspen representative components,the thermodynamic method and the calculating module for each unit were selected based on the analysis of the industrial .
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WEBJun 25, 2020 · The article presents a comprehensive study of the hydrolysis acidifiion process during anaerobic treatment of coal gasifiion wastewater (CGW), a complex and toxic industrial effluent. The authors analyze the evolution of dissolved organic matter and biotoxicity in different stages of the process, and compare the performance of .
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WEBJan 1, 2024 · Owing to the differences in raw coal and production processes, the water quality of wastewater varies, making it difficult to establish fixed treatment methods for it (Shi et al., 2023b). Owing to the complex composition of coal chemical wastewater, single conventional wastewater treatment process cannot meet treatment requirements.
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WEBApr 1, 2024 · The results showed that secondary spontaneous combustion is more likely to occur after LN 2 treatment, and the oxidation combustion reaction process of coal is faster. The above studies mainly focus on the oxidation characteristics of LN 2 to raw coal, but ignore the problem that coal has been oxidized/pyrolyzed before LN 2 injection.
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WEBMar 15, 2023 · Biochemical treatment is the main process of coal pyrolysis wastewater treatment (Zhao and Liu, 2016). Biochemical treatment generally includes anaerobic treatment unit, biological enrichment unit, and multistage anoxic/oxic (A/O) unit. Among them, anaerobic section can improve the biodegradability of toxic and refractory .
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WEBOct 15, 2016 · The experimental results of this research revealed that CFA could be converted successfully to zeolite NaP by the thermosonochemical treatment at low temperature ( 100 °C) and atmospheric pressure in 4 h. The main synthesized zeolitic phase was NaP zeolite with traces of hydroxysodalite with 1 h conventional heating .
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WEBApr 1, 2024 · The treatment of diverse mine waters and coal chemical effluent has grown to be a serious environmental issue with the growth of the coal mining and coal chemical industries [1, 2].The world coal consumption chart (Fig. 1) shows that China had the highest coal usage in 2021, reaching EJ [3].Coal gasifiion is one of the primary uses of .
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WEBOct 20, 2018 · This study provides a theoretical reference for the reduction of the environmental impact and cost saving of flue gas treatment systems in coalfired power plants. The life cycle inventory, which was established in this study provides data for future ultraclean emission treatment for flue gas in of coalfired power plants. 2. .
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WEBFeb 1, 2021 · Coal gasifiion brine (CGB) is a typical hypersaline organic wastewater and its proper treatment is a challenging task. In the study membrane distillation (MD) experiments were conducted with raw and pretreated CGB as the feeds. The flux evolutions and permeate quality in different processes were compared to study the interaction .
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WEBOct 1, 2018 · Anaerobic treatment of coal gasifiion wastewater is usually limited by the inhibition of high concentration of phenolics. In this study, the Fe 3 O 4 loaded biochar (FeBC) coupled with electric field (EFB) was used to enhance anaerobic phenolics degradation. EFB significantly accelerated anaerobic removal of phenol, pcresol and .
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WEBFeb 15, 2021 · Coal fly ash (CFA) is a byproduct of coal combustion in coalfired power stations. ... The variation of pH during the treatment process was monitored. The final pH of the treated wastewater increased from,,,, and to,,,,, respectively. This could be caused by the dissolution of the residual .
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WEBJan 1, 1980 · In this study dehnable Biological treatment of a coal gasifiion process wastewater 1271 steadystate operation occurred from 30 to 120 days in closed, full containers in order to minimize contact after the reactors were acclimatized depending upon with air. Upon arrival, solids were separated from the specified value of mean cell .
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WEBJul 1, 2023 · The above two experimental results show that the MBR process has a good treatment effect on coal chemical wastewater. Although MBR has been used successfully in the industrial wastewater treatment industry. However, for many years, membrane fouling has been a hot spot and focus in MBR research.
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WEBDec 1, 2011 · A Chinese subbituminous Shenfu (SF) coal was steam treated under atmospheric pressure and the caking and coking properties of the treated coals were evaluated by caking indexes (G RI) and crucible coking results show that steam treatment can obviously increase the G RI of SF coal. When the steam .
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WEBOther treatment processes include several chemical methods and biological leaching, which still needs development, but is very promising. One of the chemical methods is the Meyer's process, TWR, and is perhaps the best because it recycles the chemical, it does not require fine crushing of the coal, and sulfur removal is very efficient.
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WEBJan 20, 2017 · 1. Introduction. In Lurgi and BGL (British Gas Lurgi) coal gasifiion process, wastewater containing high concentration of phenol and ammonia are discharged (Zhang et al., 2015).The flow rate of this wastewater is large and included pollutants are various (Wei et al., 2016).The concentration of phenol and COD in the wastewater is in a .
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WEBNov 1, 2018 · Raw coal fly ash (RCFA) was used directly as adsorbent to treat coking wastewater. The results show that the RCFA can introduce COD (14, 4, and 11 mg L −1 at pH =,, and, respectively) into water due to the dissolution of reductive components from RCFA, this can be avoided by washing (6 times) using distilled water. .
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WEBJan 1, 2022 · Table 1 shows the A/A/O process effectively removed organic and inorganic pollutants from CWW. The total COD removal by A/A/O process during the operation period was approximately % with the average COD in the A1 effluent, A2 effluent and O effluent at 2056, 987 and 215 mg L −1, than twothirds of COD was .
WhatsApp: +86 18203695377![[PDF] Study of Changes to the Organic Functional Groups of a .](/au86m23/397.jpg)
WEBMar 28, 2013 · A high volatile bituminous coal was subjected to a series of organic acid treatment in steps using citric acid (1 hr and 2 hr) and buffered EDTA with acetic acid (1 to 3 hr) at room temperature. Leaching was performed with acetic acid (2N) also for 1 hr. Citric acid procedure reduced the mineral matter below %. Calcites and aluminates are .
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WEBJul 6, 2022 · However, few reports on the simultaneous recovery of PGMs from SAC and the synthesis of glass–ceramic via a cotreatment process with coal fly ash (CFA) can be found in the existing literature. Coal fly ash (CFA), an industrial byproduct generated from thermal power plants, can induce serious environmental impacts via direct landfills .
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WEBNov 10, 2016 · Coal gasifiion wastewater treatment process, especially for the wastewater produced by pressurized fixed bed gasifiion, has already become one of the key factors which restrict the ...
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WEBOct 1, 2023 · To study the acidizing dissolution effect of mineral components in the microstructure of coal sample after LCO 2 acidizing treatment, the coal sample is first leached by LCO 2, and then it acidified coal samples after leached shown in Fig. 1, the experimental platform is mainly composed of LCO 2 storage tank, plunger .
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