Treatment Of Explosive Contaminated Soil Eluent By Fenton Reagent Oxidation Coupling Immobilized Microbial Filter

2,4,6-trinitrotoluene?TNT? is a potent explosive monomer, widely used in military, blasting, ore mining and so on. In the refining process of TNT, it will produce a lot of waste Explosives?red water?, which penetrate the surrounding soil water, soil Explosives causing serious pollution. Washing is a common physical repair method, but this method simply transfer contaminants from soil to water contamination has not been degraded. Dinitrotoluene sodium soil eluent contained,TNT, dinitrotoluene?DNT?, nitrotoluene?MNT? and other nitro-aromatic compounds highly toxic, difficult to biodegrade, the direct discharge on the ecological environment cause serious harm to human health and, therefore, effective treatment of contaminated soil eluent Explosives for improving the ecological environment,safeguard human health of local residents is important.This research synthetically made use of physical, chemical and biological methods to treat explosive contaminated soil eluent, and gave full play to the advantages of each method to explore the technical process for the treatment of explosive contaminated soil eluent.In the pretreatment part, explore Fenton reagent oxidation Explosives contaminated soil eluent effect, select the primary, secondary kinetic equations to degrade COD oxidation reaction kinetics of Fenton fitting Fenton Reagent Oxidation Explosives contaminated soil optimum conditions eluent.Based on the pretreatment research, immobilized microorganisms anaerobicbiological aerobic filter combined system was utilized in the biochemical treatment for explosive contaminated soil eluent,to explore the system of COD feasibility removed, and biodegradation factors as well as dominant degradation Isolation and identification of bacteria were studied. Specific conclusions are as follows:?1? Explosives contaminated soil eluent black red water?pH = 6.5⁷.5?, wherein the concentration of COD of 45500 mg·L-1, eluent toxic waste. Using Fenton reagent oxidation can effectively deal with contaminated soil Explosives eluent to give the optimum reaction conditions, when FeSO₄·7H₂O dosage of 8.0 g·L-1, H₂O₂ dosage of64.0 ml·L-1, initial pH is 3, 120 min reaction time and reaction temperature 30 ?, soileluent COD dropped by the 4553.9 800.1 mg·L-1, COD removal efficiency 82.4%;eluent COD degradation reactions in line with two power learning equation. After UV detection shows that when the absorption wavelength of 500 nm, the absorbance of3.90, the results show water samples containing a large amount of aromatic compounds, after Fenton oxidation, water sample absorbance at 500 nm at from 3.90 down to 0.27 experiments show that Fenton reagent removes most oxidized absorption in the visible region of the organic pollutants. After Fenton oxidation treatment, the acute toxicity of water samples reduced 94.7%, B/C from the 0.007 rose 0.22, significantly improved biodegradability.?2? Based on the study Fenton's reagent pretreatment, using FPU immobilized microbial P925 highly efficient two-level G-AF-BAF system in the long-running case after, COD concentration to a large degree of degradation, aerobic stage can to ensure that the effluent COD is stable.?3? Anaerobic and aerobic systems HRT systems were selected 48 h and 36 h, in order to ensure water effects and to minimize the hydraulic retention time?HRT?,HRT select the entire system for 36 h; optimum water pH value of biological treatment 7.?4? Microbes can be successfully immobilized on FPU support, stability of the system, the microorganisms better adaptability Fenton water pretreatment, anaerobic reactors, mostly filamentous microorganisms, aerobic reactor microorganisms are mostly spherical.?5? For reactor dominant bacteria were high-throughput sequencing analysis, the contaminated soil degradation Explosives lotion bacteria leaching advantages are:Dok59?Pseudomonas?Mycoplana?Novispirillum?Luteimonas?Thermomonas?Nitrosovibrio?Sphingopyxis?Paracoccus?Proteiniclasticum.