TH77922A - Methods for biological treatment of oily wastewater and treatment machines. - Google Patents

Abstract

DC60 (26/12/48) for highly efficient purification of oil-purified wastewater. And at the same time for efficient recovery of organic energy in wastewater In addition, to achieve stabilization of methane fermentation treatment. Improvement of treatment efficiency, reduction of tank size for methane fermentation. Improvement of efficiency in Separation of oil from oily wastewater And reducing the amount of sludge produced, the oily wastewater is treated by agglomeration in the coagulation reaction tank 2, and then subjected to flotation. Pressure in the Oil / Water Separation Tank (Pressure Float Tank) 3 Treated Fluids - Pressure Floats are treated via The bio-in tanks for acid production, 4 tanks for high load anaerobic treatment 5 and anaerobic treatment tank 6, were then subjected to solid-liquid separation in the sedimentation pond 7. From the pressure float it is also subjected to fermentation. The methane in the methane fermentation tank 8 is then dehydrated by a dehydrator in the sludge 9 anaerobic excess sludge and / or anaerobic excess sludge. In the biological treatment process, it is introduced into an optional eight methane fermentation tanks, anaerobic excess sludge, and anaerobic excess sludge. The biological treatment process and the excess sludge through digestion for methane 8 fermentation is introduced into the agglomeration tank 2 for highly efficient purification of oil-purified wastewater. And at the same time for efficient recovery of organic energy in wastewater In addition, to achieve stabilization of methane fermentation treatment. Improvement of treatment efficiency, reduction of tank size for methane fermentation. Improvement of efficiency in The body separates oil from oily wastewater. And reducing the amount of sludge produced, the oily wastewater is treated by agglomeration in the coagulation reaction tank 2, and then subjected to flotation. Pressure in the Oil / Water Separation Tank (Pressure Float Tank) 3 Treated Fluids - Pressure Floats are treated via The bio-in tanks for acid production, 4 tanks for high load anaerobic treatment 5 and anaerobic treatment tank 6, were then subjected to solid-liquid separation in the sedimentation pond 7. From the pressure float it is also subjected to fermentation. The methane in the methane fermentation tank 8 and then is dehydrated by a dehydrator in the sludge 9 anaerobic excess sludge and / or anaerobic excess sludge. In the biological treatment process, it is introduced into an optional eight methane fermentation tanks, anaerobic sludge and anaerobic excess sludge in The biological treatment process and the excess sludge under digestion for methane 8 fermentation is introduced into the agglomeration tank 2.

Claims (14)

1. Methods for the biological treatment of oily wastewater include oil/water separation processes to obtain sludge through oil/water separation and liquid through oil/water separation of oily wastewater; methane digestion to obtain sludge after oil/water separation under methane digestion; and biological treatment processes to obtain liquid through aerobic and/or anaerobic high-load treatment, where at least some of the excess sludge generated in the biological treatment process is fed into the methane digestion process. 2. Method for the biological treatment of oily wastewater under Claim 1 where at least some of the sludge is digested in the methane digestion process and/or at least some of the excess sludge generated in the biological treatment process is mixed with the oily wastewater which is then introduced into an oil/water separation process. 3. Method for the biological treatment of oily wastewater according to claim 1, whereby methane digestion is performed under conditions such that the sludge concentration in the tank is 20,000 mg/L or more, SRT is 15 days or more, and HRT is 20 days or less. 4. Method for the biological treatment of oil-containing wastewater under claim 2, whereby the biological treatment process comprises a high-load anaerobic treatment process and is further integrated with an acid fermentation process for the treatment of oil-containing wastewater by acid fermentation, where the treated liquid of the acid fermentation process is introduced into an oil/water separation process. 5. Methods for the biological treatment of oily wastewater include oil/water separation processes to obtain sludge through oil/water separation and liquid through oil/water separation of oily wastewater; methane digestion to obtain sludge through oil/water separation under methane digestion treatment; and biological treatment to obtain liquid through aerobic and/or high-load anaerobic treatment, where at least some of the digested sludge generated in the methane digestion process and/or at least some of the excess sludge generated in the biological treatment process is mixed with the oily wastewater which is then fed into the oil/water separation process. 6. Method for the biological treatment of oily wastewater according to claim 5, whereby methane digestion is carried out under conditions such that the sludge concentration in the tank is 20,000 mg/L or more, SRT is 15 days or more, and HRT is 20 days or less. 7. Method for the biological treatment of oily wastewater under claim 5, whereby the biological treatment process comprises a high-load anaerobic treatment process and is further combined with an acid fermentation process for the treatment of oily wastewater by acid fermentation, where the treated liquid of the acid fermentation process is introduced into an oil/water separation process. 8. The biological treatment system for oily wastewater comprises: an oil/water separation pathway for obtaining sludge through oil/water separation and liquid through oil/water separation of oily wastewater; a methane digestion pathway for obtaining sludge through oil/water separation under methane digestion treatment; a biological treatment pathway for obtaining liquid through separation under aerobic and/or anaerobic high-load treatment; and a sludge conveying pathway to introduce at least a portion of the excess sludge generated by the biological treatment pathway into the methane digestion pathway. 9. The equipment for the biological treatment of oily wastewater under claim 8 includes a sludge mixing pathway for the mixing of at least some of the digested sludge generated by the methane digestion pathway and/or at least some of the excess sludge generated by the biological treatment pathway into the oily wastewater which is fed into the oil/water separation pathway. 10. A biological treatment device for oily wastewater according to claim 9, whereby the methane digestion pathway is operated under conditions such that the sludge concentration in the tank is 20,000 mg/L or more, SRT is 15 days or more, and HRT is 20 days or less. 11. A biological treatment unit for oily wastewater under claim 9, in which the biological treatment pathways consist of a high-load anaerobic treatment pathway and are further integrated with an acid digestion pathway for the treatment of oily wastewater, in which the treated liquid from the acid digestion pathway is introduced into an oil/water separation pathway. 12. The biological treatment system for oily wastewater comprises: an oil/water separation pathway for obtaining sludge through oil/water separation and liquid through oil/water separation of oily wastewater; a methane digestion pathway for obtaining sludge through oil/water separation under methane digestion treatment; a biological treatment pathway for liquid through separation under aerobic and/or high-load anaerobic treatment; and a sludge mixing pathway for mixing at least some of the sludge through digestion generated in the methane digestion pathway and/or at least some of the excess sludge generated by the biological treatment pathway with the oily wastewater that has been introduced into the oil/water separation pathway. 13. A biological treatment device for oily wastewater under claim 12, in which the methane digestion pathway is operated under conditions such that the sludge concentration in the tank is 20,000 mg/L or more, SRT is 15 days or more, and HRT is 20 days or less. 14. A biological treatment unit for oily wastewater under claim 12, in which the biological treatment pathways consist of a high-load anaerobic treatment pathway and are further integrated with an acid digestion pathway for the treatment of oily wastewater, in which the treated liquid from the acid digestion pathway is fed into an oil/water separation pathway.