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Published on: October 15, 2015
Elemental sulfur formation and nitrogen removal from wastewaters by autotrophic denitrifiers and anammox bacteria
Chunshuang Liu1, Dongfeng Zhao1, Laihong Yan1
1College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
Abstract:
Elemental sulfur (S(0)) formation from and nitrogen removal on sulfide, nitrate and ammonium-laden wastewaters were achieved by denitrifying ammonium oxidation (DEAMOX) reactor with autotrophic denitrifiers and anaerobic ammonium oxidation (anammox) bacteria. The sulfide to nitrate ratio is a key process parameter for excess accumulation of S(0) and a ratio of 1.31:1 is a proposed optimum. The Alishewanella, Thauera and Candidatus Anammoximicrobium present respectively the autotrophic denitrifiers and anammox bacteria for the reactor. DEAMOX is demonstrated promising biological process for treating organics-deficient (S+N) wastewaters with excess S(0) production.
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