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ABSTRACT
Sulfide is highly toxic, corrosive, malodorous and may cause many other hazards; therefore, it is necessary to take effective measures to control its emission to the environment. Many physicochemical processes have been devised to separate sulfur from wastewaters. Compared with those traditional methods, biological sulfide removal processes not only have high removal rates, but also generate elemental sulfur, thus recovering mineral resources from wastes. In the paper, the generation methods of elemental sulfur in biological sulfide removal process are reviewed and the characteristics of biologically produced sulfur are described, accordingly the recovery methods of elemental sulfur from wastewater are discussed.
Additional information
Funding
This work was supported by Zhejiang Provincial Natural Science Foundation of China under Grant LY18E080007 the Scientific Research Fund of Zhejiang Provincial Education Department under Grant Y201635678; Key Laboratory for water pollution control and Environmental Safety of Zhejiang Province under Grant 2015ZJSHKF06; Major science and technology special project by Science Technology Department of Zhejiang province under Grant 2015C02037, and Zhejiang provincial finance special project under Grant S1701.