Iron-catalytic technology for the purification of strong hydrogen
sulfide-containing wastewater from petroleum organic synthesis plants

Summary

Recommendations for the selection of a process flow scheme for the removal of sulfides by the method of iron-catalytic oxidation were developed and theoretically substantiated. The optimal conditions for running the process and utilization of sulfur extracted from wastes in the form of a commercial product were established. The proposed solutions are a new practical direction for improving the methods for removing hydrogen sulfide from concentrated solutions (total H₂S is more than 50 mg/dm³). Recommendations for the selection of the optimal parameters of the process and technological schemes of desulfidation by the method of iron-catalytic oxidation were composed. A new no-waste technology for the removal of sulfides from industrial wastewater and solutions by the method of iron catalytic oxidation with the regeneration of the recycling iron hydroxide in the technology of purification with air oxygen and the utilization of sulfur extracted from the wastewater in the form of a commercial product is proposed. Advanced and environmentally friendly process flow schemes for the removal of sulfides field-tested and introduced into the investment project are proposed. Their practical implementation in industrial wastewater treatment will provide for eliminating environmental pollution with H₂S and SO₂ emissions and obtaining the effluent that meets both the conditions of reuse in oil-and-gas synthesis technology and regulatory requirements for the industrial effluent discharge into the municipal sewer at minimal expense.

Keywords

sulfide-alkaline wastewater , sulfides , hydrogen sulfide , iron-catalytic oxidation of sulfides

Purification of hydrogen sulfide containing natural water
by iron-catalytic oxidation in a reactor with unltrafiltration separation

Summary

Currently purification of hydrogen sulfide containing water has been still a bottleneck in water treatment and demands advanced high-efficient technologies, equipment and plants providing for solving at the same time drinking and environmental aspects. The technology based on iron-catalytic oxidation of sulfides in the presence of atmospheric oxygen and combined with membrane treatment is proposed as an advanced technology of hydrogen sulfide removal from natural water. The data on practical testing the proposed technology in a laboratory unit is presented. Subsequent to the results of the experimental studies the area of the developed technology application in purification of hydrogen sulfide containing natural water is substantiated. The absence of accompanying hydrogen sulfide emission from the reactor in the process of water purification and environmental safety has been noted. Based on the obtained results the technology is considered for today as possible and essential. Herewith further study with investigations directed at determining the optimal process parameters is needed.

Key words

natural water , water treatment , hydrogen sulfide , iron-catalytic oxidation of sulfides , membrane separation