Co-substrate promoting the biodegradation of refractory DOM in semi

As illustrated in Fig. S1, the designed semi-coking wastewater treatment processes of a coking enterprise in Yulin, Shanxi Province, China, consisted of pretreatment, biological treatment and advanced oxidation process with a capacity of ∼3000 m 3 /d. The pretreatment units included an oil-water separator, two ammonia-stripping towers, and a ...

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Review article A review of the state-of-the-art

The detailed information about the molecular structure transformation in the thermoplastic stage has not been acquired. Therefore, the insight into and the establishment of the 3D carbon structures of the semi-coke during the coking process is crucial for achieving a comprehensive understanding of the carbon structure evolution.

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Synergistic removal of organics from semi-coke wastewater by …

Due to the late emergence of the semi-coke industry, there was no mature treatment process for semi-coke wastewater at home and abroad, and the existing treatment methods were mostly based on coking wastewater with similar water quality [8].At present, semi-coke wastewater treatment usually includes a two-stage process.

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Efficient degradation of semi-coking wastewater in three …

Semi-coking wastewater contains a rich source of toxic and refractory compounds. Three-dimensional electro-Fenton (3D/EF) process used CuFe2O4 as heterocatalyst and activated carbon (AC) as particle electrode was constructed for degrading semi-coking wastewater greenly and efficiently. CuFe2O4 nanoparticles were prepared by coprecipitation …

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Light Oil (Coal), Semi-Coking Process; Fresh Oil; [The …

화학 물질 안전 데이터시트 MSDS/SDS Light Oil (Coal), Semi-Coking Process; Fresh Oil; [The Volatile Organic Liquid Condensed From The Gas Evolved In The Low-Temperature (Less Than 700캜 (1292캟)) Destructive Distillation Of Coalposed Primarily Of C6-10

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Light oil (coal), semi-coking process

Light oil (coal), semi-coking process chemical information summary.

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Treatment effects and genotoxicity relevance of the toxic organic

The removal effects of main toxic organic pollutants in semi-coking wastewater by combined treatment process were investigated, while the genotoxicity relevance of wastewater from different treatment units were monitored by using Vicia faba bioassays. Results showed that 37 kinds of toxic organic pollutants were detected in the crude sewage, most of them were …

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Self-doped N, S porous carbon from semi-coking wastewater …

Materials. The carbon source was semi-coking wastewater acquired from Yulin, Shaanxi, China. The content of phenols in semi-coking wastewater was determined by (National Standard, 2014), and the content was about 3,000 mg L −1 (Wang et al., 2020).The chemicals, including, formaldehyde, ethanol, acetone, potassium hydroxide, and hydrochloric acid, were purchased …

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Self-doped N, S porous carbon from semi-coking wastewater

coking wastewater, but the COD concentration of semi-coking wastewater is approximately 10 times higher, and the concentrations of ammonia nitrogen and phenols are also significantly higher than coking wastewater (Bokun et al., 2020). Semi-coking wastewater is the most harmful type of wastewater due to its high COD and high toxicity (Ma et al.,

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Variations in toxicity of semi-coking wastewater treatment processes

The wastewater from coal carbonization was divided into two categories: the semi-coking wastewater produced from the middle- (700–800 °C) and low- (500–600 °C) temperature carbonization processes and the coking wastewater produced from the high-temperature carbonization process (950–1050 °C).The semi-coking and coking wastewater exhibit similar …

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Clean Preparation of Formed Coke from Semi-coke by …

In order to address the low thermal efficiency of low-rank coal combustion and the accompanying serious environmental issues, formed coke was prepared using a carbonization consolidation method with low-rank coal …

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Preparation Conditions and Property Characterizations of …

discharge of semi-coking wastewater, and solve its dif-cult degradation and dicult treatment. 2 Experimental Process 2.1 Water Sample Collection The semi-coking wastewater in this paper was col-lected from a semi-coke plant with an annual output of 1 million tons in Shaanxi Province, China. The waste-

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Semi Coke

Semi coke is the solid products, obtained from low-rank bituminous coal, lignite, or peat by carbonization at low temperature (500–750 °C) in a retort furnace. In general, semi coke is also a by-product or intermediate product of the conversion of coal into liquid and gaseous …

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Variations in toxicity of semi-coking wastewater treatment …

The variation of biotoxicity in the semi-coking wastewater treatment processes implies that the coagulation and adsorption processes resulted in more efficient biotoxicity …

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Technological Advancements and Prospects for Near …

This review examines the technological bottlenecks, potential solutions, and future development directions in the treatment and resource utilization of semi-coking wastewater (SCOW) in China.

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Simultaneous biodegradation of phenolics and petroleum …

The microbial community consisting of Pseudomonas stutzeri N2 and Rhodococcus qingshengii FF could effectively and simultaneously remove phenols and petroleum hydrocarbons, and these two strains possess great potential of being applied in aerobic biological treatment process of large-scale semi-coking wastewater.

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Simultaneous biodegradation of phenolics and petroleum …

The emergent semi-coking wastewater had the characteristics such as large amounts of discharge, high toxicity, high concentration ammonia nitrogen and chemical oxygen demand (COD), which make it more difficult to treat by biological method (Ailijiang et al., 2021).Phenols and petroleum hydrocarbons with higher concentration were concurrently …

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Mechanism of carbon structure transformation in plastic layer and semi

The transformation of the carbon structure of coal during the coking process influences the coke microstructure and microtexture, and ultimately, the coke quality. ... Mechanism of carbon structure transformation in plastic layer and semi-coke during coking of Australian metallurgical coals. / Chen, Yixin; Lee, Soonho; Tahmasebi, Arash et al.

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Study on the Removal Effects and Genotoxicity Evaluation of

Figure 1 shows the process of treating semi-coking wastewater. The pilot scale process was designed to handle 5–10 t/d of raw semi-coking wastewater. Methyl isobutyl ketone was used as the extractant, whereas the extractant to wastewater volume ratio was 1 to 8, respectively. In addition, the extraction time was 15 min.

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Shrinkage Character in the Process of Semi-coke Formation

Semi-coke is made by charging coal into hot ovens, usually in the temperature range 350-500°C. Layers of plastic coal are formed parallel to the heated oven surfaces and these move …

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Treatment effects and genotoxicity relevance of the toxic organic

The removal effects of main toxic organic pollutants in semi-coking wastewater by combined treatment process were investigated, while the genotoxicity relevance of wastewater from different treatment units were monitored by using Vicia faba bioassays. Results showed that 37 kinds of toxic organic po …

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Variations in toxicity of semi-coking wastewater treatment

Five benzenes, 11 phenols, and five polycyclic aromatic hydrocarbons (PAHs) were investigated as the dominant contaminants in semi-coking wastewater. Because of residual extractant, the phenols extraction process increased acute toxicity to V. fischeri and immobilization and lethal toxicity to D. magna.

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Tutorial: Delayed Coking Fundamentals

MODERN DELAYED COKING PROCESS The delayed coker is the only main process in a modern petroleum refinery that is a batch-continuous process. The flow through the tube furnace is continuous. The feed stream is switched between two drums. One drum is on-line filling with coke while the other drum is being steam-stripped, cooled, decoked, pressure

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Emerging concerns of VOCs and SVOCs in coking

In this study, the distribution profiles, emission characteristics, and health risks associated with 43 volatile and semi-volatile organic compounds, including 15 phenols, 18 polycyclic aromatic hydrocarbons (PAHs), 6 BTEX, and 4 other compounds, were determined in the wastewater treatment plant (WWTP) of a coking factory (plant C) and the succeeding final …

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Evolution of carbon structure and cross-linking structure during coking

In this paper, five coking coals with different degrees of metamorphism were selected for coking experiments. XPS and HRTEM techniques were used to study the evolution of the carbon structure of the coking coal during the coking process, which provided theoretical support and a practical basis for a more reasonable, efficient, and environmentally friendly use …

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Delayed Coking, Fluid Coking

Delayed coking is a semi-continuous process in which the heated charge is transferred to large soaking (or coking) drums, which provide the long residence time needed to allow the cracking …

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Quality during Coking Process

carbon structures of the plastic layer change and become solid to form semi-coke [11–13]. ... changes of chemical structures and micro-composition during the coking process. 2. Materials and Methods

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Self-doped N, S porous carbon from semi-coking wastewater …

As seen in Supplementary Figures S1,S2 and Supplementary Table S1, N and S elements in semi-coking wastewater were detected by XRD and GC-MC analysis.Moreover, elemental analysis was employed to investigate the element species and content of the intermediate product NSPR. Supplementary Table S2 illustrates the results, which confirm that …

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Review article A review of the state-of-the-art

Once the temperature of the coal charge exceeds the thermoplastic range, condensation, cross-linking, and repolymerization reactions take place. This results in the …

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Review article A review of the state-of-the-art research on carbon

This paper provides a review of the state-of-the-art research in the open literature on the carbon structure evolution in the semi-coke region following the last stage of the plastic layer transformation. Coking coals exhibit thermoplastic fluid-like behavior due to the change of chemical structures in plastic layers when heated in the coke ovens. Once the temperature of …

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