Repozytorium publikacji - Politechnika Gdańska

Temperature is a key operational factor influencing the anammox process kinetics. In particular, at temperatures below 15 °C, the specific anammox activity (SAA) considerably decreases. This study aimed to describe the temperature dependence of the anammox process kinetics in the temperature range from 10 to 55 °C, including the specific characteristics of“cold anammox”. The commonly used Arrhenius and extended and modifiedRatkowsky equations were examined. The Ratkowskyequationsyieldedastrong correlation (coefficient of determination, R2= 0.93–0.96) between the measured and predicted data over the analyzed temperature range(10–55 °C). However, these equations could not correctly reflect the anammox temperature dependence at temperatures below 15 °C (R2= 0.36–0.48). Therefore, a new generalized temperature model was proposed. The generalized temperature equation (GTE) considered the division of the analyzed temperature range into three temperature ranges: 10–15 °C, 15–35 °C and 35–55 °C. The ranges correspond to“cold anammox”,“(low)mesophilic anammox” and “thermophilic anammox”. The applied approach yielded a strong correlation between the measured and predicted SAA (R2= 0.97) over the temperature range from 10 to 55 °C and over the low-temperature range from 10 to 15 °C (R2= 0.99). Overall, the GTE could enhance the predictions of the temperature dependence of the anammox process kinetics. The GTE can help examine anammox-based bioaugmentation systems operating at both high temperatures (sidestream reactors) and low temperatures (mainstream reactors).

Autorzy

• dr inż. Dominika Sobotka link otwiera się w nowej karcie ,
• Jun Zhai,
• prof. dr hab. inż. Jacek Mąkinia link otwiera się w nowej karcie