The combined technical route of chemical separation, biochemical treatment, and depth treatment is commonly used to treat highly concentrated organic wastewater containing phenols from coal gasification in industry [3,4,5].The coal gasification wastewater contains concentrations of phenolic substances which will poison and inactivate the working flora in the biochemical treatment section.
The process may occur naturally during coal stockpiling for the weathering (Aich et al. 2019; Maloney et al. 1982) ... It is thus suggested to operate the thermal treatment for preparation of coalderived ACs at the heating rate range 2040 °C (Tables and ).
A number of water treatment systems are in place, mainly in the gold, coal, nickel, and copper industries. The systems are installed at operational, industrial scale plants, where mine drainage or pit water, waste water from tailing storage facilities, and even "produced water" from coal seam methane production are treated.
This treatment process works well to reduce the suspended solids, metals, and acidity in the wastewater, but it leaves in solution the highly soluble salts, including calcium, magnesium, sodium ...
The basic purpose of coal treatment for most uses to which coal was put, was to reduce the ash content of the coal but during the treatment process some of the sulfur was also removed. ... lowash coal) the Synthoil process of teh Bureau of Mines and the Hcoal process of Hydrocarbon Research Incorporated could be considered as likely process ...
The coal chemical wastewater (CCW) was produced in the process of coal coking, coal lowtemperature distillation, coal gasification, and coal direct liquefaction. The great volume and complex water quality were common, and it was typical industrial wastewater with higher treatment difficulty (Wang et al. 2021b).
The work breakdown structure (WBS) model can estimate costs for a process to add phosphoric acid or zinc orthophosphate into a water pipeline at an existing drinking water treatment plant. It can estimate the cost of phosphate feed using different chemical formulations, if the user provides appropriate inputs for the alternative chemical ( ...
The coalgasification wastewater treatment is the most difficult pollution control task for coalgasification plants. It is identified that there are two serious problems occurring in the current treatment process,, low performance of phenols removal and plugging induced by ammonia salts. A new treatment process is proposed in this paper to solve these severe problems and pursue clean ...
The literature on treatment of the coal gasification 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 added in the environment from coal gasification wastewater operations.
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: pretreatment, concentration and reduction, and evaporation and crystallization.
Introduction. Global warming caused by greenhouse gas emissions is a serious environmental issue. CO 2 is the primary greenhouse gas, and fossil fuel power plants account for approximately 44% of annual global CO 2 emissions (Kotowicz and Bartela, 2012). Almost half of the total CO 2 emissions from China are from coalfired power plants, as coal is widely used for power generation (Xu et al ...
The treatment process of this coal gasification wastewater treatment plant consisted of pretreatment processanaerobic processbiological enhanced (BE) processanoxic/oxic (A/O) processadvanced treatment process. The pollutant removal performances of different process units are shown as Table S1 in supplementary material. The wastewater used ...
According to the accurate model, the simulation for ZLD of fixedbed coal gasification wastewater treatment process is established, and this process is assessed from the perspective of thermodynamics, economy, and environment. The total energy consumption of ZLD process before optimization is × 10 8 W. The results of exergy analysis show ...
5. Operational Optimization of the Membrane Treatment Process for CoalFired Power Plant Wastewater. Through the above simulation analysis, it is clear that the goal of the lowest specific energy consumption and daily average operating cost of the system can be achieved by adjusting the feed conditions of the system.
It is a process that normally begins at the early stage of a mine site opening (European Commission, ... pulps with a low proportion of solids are used in the pumping of less dense tailings such as those from coal treatment (Department of Industry, Tourism and Resources, 2007). The consistency of the pulp depends on the type of tailings, their ...
A process and apparatus for treating coal to produce micronsize coal particles having high surface reactivity and a low level of ashforming impurities. The process involves grinding the coal in a substantially air tight fluid energy attrition mill to form a hydrophobic coalfraction and a hydrophilic impuritiesfraction, and separating the fractions by virtue of the impuritiesfraction's ...
The treatment process of the wastewater from fixedbed gasification is complex and the operation cost is high (Yang and Corsolini, 2019). Coal chemical projects consume a large quantity of water and produce a lot of wastewater, respectively (Chen et al., 2020). Most of the coal chemical projects are located in the northwest region of China ...
Recovery of platinum and synthesis of glassceramic from spent automotive catalyst via cotreatment process with coal fly ash Sun, Shuchen; Liu, Chuan; Xiao, Faxin; Tu, Ganfeng; Abstract. Publication: Journal of Material Cycles and Waste Management.
Given that the oil content in coal pyrolysis wastewater was ~2000 ppm, the residual oil content in the outlet water would be ~380 ppm, which satisfies the requirement of the subsequent treatment process. Furthermore, the PVDFmodified PP fibers exhibited excellent reusability and stability to defy various environmental corrosions.
In conclusion, multiple lines of evidence were provided to clarify the regulation mechanism of microbial metabolism on the efficient degradation of aromatic compounds for biochemical treatment process of coal chemical wastewater in pilot scale. The results laid a good foundation for realizing the harmless treatment of coal chemical wastewater.
Mining coal. Coal miners use large machines to remove coal from the earth. Many coal deposits, called coal beds or seams, are near the earth's surface, but others are deep mining methods allow coal miners to easily reach most of the nation's coal reserves and to produce about three times more coal in one hour than in 1978.
tivated sludge from a coal chemical wastewater treatment process was reported by using the prepared CuCe/Al2O3 catalyst. The effects of the catalyst dosage, reaction temperature and time, and the initial oxygen pressure on the reactivity of the system were investigated. In addition, the characteristics of the produced liquid and solid were ...
What Is MG217? MG217 products use either 3% salicylic acid or 3% coal tar as their main ingredient to help ease the symptoms of psoriasis. Salicylic acid is a keratolytic agent that dissolves the scales or plaques on the skin. Coal tar suppresses the body's ability to produce skin cells in overabundance. These medicated lotions or creams ...
I claim: 1. A process for treating coal to reduce the level of ashforming impurities contained therein comprising: a. grinding raw coal to a particle size of less than about 40 microns in a substantially air free environment to form a coalfraction which comprises a major portion of hydrophobic coal particles and a minor portion of hydrophilic coal particles, and an impuritiesfraction ...
In this particular plant, it was decided to desaturate the wastewater of sulfates and remove the bulk of the insoluble suspended solids prior to tertiary treatment of heavy metals and arsenic using a chemical/physical treatment process. Additional treatment could be provided (, anoxic biological treatment) for selenium, nitrates and organics.
The properties of the carbon materials obtained as the final product of coal tar pitch carbonization process are a consequence of the type of chemical and physical phenomena occurring through the process. A new simplified approach for modeling of the primary carbonization is presented to provide the semiquantitative knowledge about the process useful for improving the efficiency of the ...
The present invention relates to a lump coal processing facility for coal supply and the objective of the present invention is to process lump coal generated in a process of supplying coal into a state to be used for fuel in a series of processes of supplying coal, thereby increasing manageability of coal storage and usability of a loader and preventing pollution caused by lump coal.
Optimum process conditions were selected based on the minimum loss of NaOH and maximum PD (so that reactor volume required per ton of raw coal treatment can be minimized) along with the desired ...
In this paper,treatment process of coal chemical industry is described mainly, such as pretreatment process,biochemical treatment process and polishing process. Through the recovery of phenol and ammonia and the treatment of wastewater from abroad, the new technology of wastewater treatment in coal chemical industry was expounded.
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