公开(公告)号：US10301204B2

公开(公告)日：2019-05-28

申请号：US15543107

申请日：2016-01-12

Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Guanghao Chen ,  Feng Jiang ,  Ho Kwong Chui

IPC: C02F3/34 ,  C02F3/00 ,  C02F3/12 ,  C02F3/30 ,  C02F3/28 ,  C02F3/06 ,  C02F101/10

Abstract: A method of removing organic carbon in biological wastewater treatment includes the steps of: (a) oxidizing organic carbon to carbon dioxide with elemental sulfur as an electron carrier, and reducing the elemental sulfur to sulfide; (b) oxidizing the sulfide to elemental sulfur by recycled nitrate through controlling one or more of a recycling ratio to maintain an oxidation reduction potential (ORP) within the range of −360 mv to −420 mv, using an auto ORP controller; (c) recycling the elemental sulfur formed during oxidation of the sulfide back to the oxidation of the organic carbon; and (d) oxidizing ammonium to nitrate then partially recycled back for sulfide oxidation.