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Start-up of Anammox Reactor at Low Substrate Concentration

Ji Liu

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Abstract

An up-flow anaerobic packed-bed reactor with effective volume of 88.7 L was adopted to start up the ANAMMOX process.The results showed that,after 119 days operation,the NH4+-N and NO2——N removal efficiency increased to 100% and 97.40%,respectively,while the TN removal efficiency was 91.71%.The ratio among the three types of nitrogen-contained substance,ρ(NH4+-N) : ρ(NO2——N) : ρ(NO3——N)was 1 : 1.35 : 0.28.Then,the HRT was decreased to increase the loading rate of the reactor from 35.5 h to 15.2 h.At the end of the operation,the loading rate of TN was 0.10 kg/(m3·d),and brown sludge with ANAMMOX character was obtained.

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What this paper is about

An up-flow anaerobic packed-bed reactor with effective volume of 88.7 L was adopted to start up the ANAMMOX process.The results showed that,after 119 days operation,the NH4+-N and NO2——N removal efficiency increased to 100% and 97.40%,respectively,while the TN removal efficiency was 91.71%.The ratio among the three types of nitrogen-contained substance,ρ(NH4+-N) : ρ(NO2——N) : ρ(NO3——N)was 1 : 1.35 : 0.28.Then,the HRT was decreased to increase the loading rate of the reactor from 35.5 h to 15.2 h.At the end of the operation,the loading rate of TN was 0.10 kg/(m3·d),and brown sludge with ANAMMOX character was obtained.

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Available abstract

An up-flow anaerobic packed-bed reactor with effective volume of 88.7 L was adopted to start up the ANAMMOX process.The results showed that,after 119 days operation,the NH4+-N and NO2——N removal efficiency increased to 100% and 97.40%,respectively,while the TN removal efficiency was 91.71%.The ratio among the three types of nitrogen-contained substance,ρ(NH4+-N) : ρ(NO2——N) : ρ(NO3——N)was 1 : 1.35 : 0.28.Then,the HRT was decreased to increase the loading rate of the reactor from 35.5 h to 15.2 h.At the end of the operation,the loading rate of TN was 0.10 kg/(m3·d),and brown sludge with ANAMMOX character was obtained.

Key concepts: Anammox, Volume (thermodynamics), Chemistry, Nitrogen, Substrate (aquarium), Volumetric flow rate, Surface-area-to-volume ratio, Anaerobic exercise

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