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 .
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WEBAug 15, 2023 · The extraction process of CBM involves the dewatering of coal seams, enabling the release of trapped methane gas [1].However, one of the primary challenges encountered during CBM production is the significant amount of water that accompanies the extracted gas [2].This water, known as produced water, poses a major problem in terms .
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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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WEBJan 17, 2023 · Coal tar distillate (of which creosote is a product) is a dark brown liquid that is produced by thermal distillation of coal tar. Coal tar is a biproduct of producing coke for steel production from coal via a pyrolytic process in "coke ovens" where the coal is heated to over 1,000°C in an oxygenlimited condition (Ametek 2022).The tar is distilled into .
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WEBMar 1, 2020 · In particular, studies have determined the effect of different parameters, including the hydrothermal treatment, on direct coal liquefaction (DCL) in the presence of tetralin and iron sulfide alysts [21a]. ... Another backmixtype reactor for the proposed SRCII (solvent refined coal11) process has a height of m and diameter of m.
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WEBIn this study, a sequential Fe 0 /H 2 O 2 reaction and biological process was employed as a lowcost depth treatment method to remove recalcitrant compounds from coalchemical engineering wastewater after regular biological treatment. First of all, a chemical oxygen demand (COD) and color removal efficiency of 66 and 63% was achieved at initial pH of .
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WEBJan 20, 2022 · Biochemical treatment is the main process of coal chemical wastewater treatment (Zhao and Liu, 2016). 90% of the pollutants are removed through the biochemical section (Shi et al., 2020a). COD and NH 3 –N in the influent are 2000 mg/L and 120 mg/L, and that in the effluent are 200 mg/L and 20 mg/L, respectively (Zheng et al., .
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WEBApr 15, 2019 · Coal gasifiion wastewater (CGWW) is a typical toxic and refractory industrial wastewater. Here, a novel phenol and ammonia recovery process (IPE) was employed for CGWW pretreatment, and the coupled system assemble by the IPE process with A 2 /O system (IPEA 2 /O) were operated to enhance the treatment performance .
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WEBOct 15, 2021 · The coal chemical production process is complex and each produces various pollutants (Xie et al., 2020). ... Process development of flue gas desulphurization wastewater treatment in coalfired power plants towards zero liquid discharge: energetic, economic and environmental analyses. J. Clean.
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WEBSep 30, 2021 · Beneficiation of coal is a water intensive process, and the water is recovered in downstream operations in the high rate thickener (HRT) and vacuum belt filtration (VBF). Clean coal particles entering the HRT have an inherent tendency to enter the overflow because they are extremely fine and hydrophobic. Hence, flocculants .
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WEBFeb 1, 2024 · For coal gasifiion wastewater, simple coagulation process or adsorption process as advanced treatment process is enough for guaranteeing the discharge standard. In comparison, the AOPs was required for coal liquefaction wastewater and coking wastewater.
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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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WEBFeb 1, 2019 · 1. Introduction. Coal seam gas (CSG) is an unconventional resource which has been exploited in recent years as a substitute for coal and oil [1].Gas extraction involves decreasing the water pressure which holds the methane in place in the coal cleats [2, 3].Through this process, significant volumes of associated water are produced .
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WEBJun 1, 2024 · Moreover, the removal rate of PAHs in the conventional biochemical treatment process is only 8–15 % (Jia et al. 2016). Consequently, the key challenge in clean production and highquality development in the coal chemical industry is the urgent need to realize the effective degradation of aromatic compounds and the harmless .
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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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WEBMay 1, 2022 · In order to solve the problem of mine water treatment in the production process of coal mine enterprises, the source and characteristics of mine water are introduced, and the zero discharge technology of mine water is studied and applied in engineering, the zero discharge technology of mine water includes three stages: .
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WEBJun 25, 2020 · 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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WEBDec 10, 2021 · CoalA is the reject/tailing coal from fines circuit (− mm) froth flotation process, which is presently used for foundry appliion. CoalB and CoalC are the rejects from the coarse circuit (−13 + mm) dense medium cyclone. CoalB is also known to be coal middlings, is used for power generation.
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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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WEBMar 25, 2020 · Abstract Coal chemical energy industry has developed rapidly due to the primary position of coal in energy reserves in China. At the same time, coal chemical industry is also a highwater consumption industry. What's more, coal chemical wastewater contains high concentration of phenols, NH3N, and toxic and harmful substances. In the .
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WEBDec 1, 2021 · This review analyzes all the treatment technologies of the typical coal chemical wastewater projects investigated in China based on these three processes. From the evaluation of the advantages and ...
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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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WEBJun 1, 2019 · A prospective alumina extraction process of cotreatment of coal fly ash (CFA) and red mud (RM) was proposed. The effects of RM on the alumina dissolution, the consumption of Na 2 CO 3, the mineral transformation during the calcination, the compositions and properties of the acidleached residue were investigated .
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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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WEBTreatment Processes. In a typical pressure treatment process, wood is placed in a horizontal cylinder up to 150 ft. long and 7 ft. in diameter as shown in Figure 3. The cylinder is flooded with the chemical followed by a cycle of pressure and vacuum. Pressure treatment methods are classified into two basics groups: fullcell and emptycell ...
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WEBApr 28, 2017 · As shown in Fig. 1 a, in the absence of MOs/SAC, TOC removal efficiency of MCO was very low (<1%), suggesting that organic contaminants in biologically pretreated LCGW cannot be damaged with a single MW irradiation. The energy of MW irradiation ( J mol −1 at GHz) was insufficient to overcome bond energy of the chemical bonds .
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WEBJul 10, 2020 · 1. Introduction. Coal plays a significant role in the energy mix of China (Dudley, 2019), which accounts for approximately % of the total installed capacity (National Bureau of Statistics of the People's Republic of China, 2019).With the everincreasing stringent limits on pollution emissions from the energy industry in China, flue .
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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 10, 2016 · The 1977–2015 literature on treatment of the coal gasifiion wastewater is reviewed. An overview based on ammonia and phenol recovery, biochemical treatments and advanced treatment technologies is presented with the purpose of unveiling the reasons behind problems of high concentration of persistent organic pollutants being .
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WEBSep 1, 2016 · The treatment of coal gasifiion wastewater (CGW) poses a serious challenge on the sustainable development of the global coal industry. The CGW contains a broad spectrum of highstrength recalcitrant substances, including phenolic, monocyclic and polycyclic aromatic hydrocarbons, heterocyclic nitrogenous compounds and long chain .
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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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