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Anaerobic ammonium oxidation (ANAMMOX) for biological ntrogen removal from coking wastewater

Lin Lin, LI Yu-ping, Cao Hongbin, Qingyu Li, LI Hai-bo

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Abstract

Anaerobic ammonium oxidation (ANAMMOX) for the biological treatment of coking wastewater was investigated. An ANAMMOX reactor was successfully started up after 115d, at 34℃ and pH 7.5～8.5, with a hydraulic retention time (HRT) of 33h. The volume loading of total nitrogen (TN) up to 160 mg/(L·d) was obtained with 80 mg/L NH4+-N and 90 mg/L NO2--N in the influent. The maximum removal of TN, ammonia nitrogen and nitrite nitrogen reached 75%, 86% and 98%, respectively. The organic composition of influent and effluent of ANAMMOX reactor was investigated with GC-MS measurement, and the results showed that phenols were of easily-biodegraded organics in coking wastewater and low-concentration phenols from shortcut nitrification process could be removed in ANAMMOX reactor.

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What this paper is about

Anaerobic ammonium oxidation (ANAMMOX) for the biological treatment of coking wastewater was investigated. An ANAMMOX reactor was successfully started up after 115d, at 34℃ and pH 7.5～8.5, with a hydraulic retention time (HRT) of 33h. The volume loading of total nitrogen (TN) up to 160 mg/(L·d) was obtained with 80 mg/L NH4+-N and 90 mg/L NO2--N in the influent. The maximum removal of TN, ammonia nitrogen and nitrite nitrogen reached 75%, 86% and 98%, respectively. The organic composition of influent and effluent of ANAMMOX reactor was investigated with GC-MS measurement, and the results showed that phenols were of easily-biodegraded organics in coking wastewater and low-concentration phenols from shortcut nitrification process could be removed in ANAMMOX reactor.

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Available abstract

Anaerobic ammonium oxidation (ANAMMOX) for the biological treatment of coking wastewater was investigated. An ANAMMOX reactor was successfully started up after 115d, at 34℃ and pH 7.5～8.5, with a hydraulic retention time (HRT) of 33h. The volume loading of total nitrogen (TN) up to 160 mg/(L·d) was obtained with 80 mg/L NH4+-N and 90 mg/L NO2--N in the influent. The maximum removal of TN, ammonia nitrogen and nitrite nitrogen reached 75%, 86% and 98%, respectively. The organic composition of influent and effluent of ANAMMOX reactor was investigated with GC-MS measurement, and the results showed that phenols were of easily-biodegraded organics in coking wastewater and low-concentration phenols from shortcut nitrification process could be removed in ANAMMOX reactor.

Key concepts: Anammox, Wastewater, Chemistry, Effluent, Ammonium, Nitrite, Hydraulic retention time, Nitrogen

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