67
Tecnología y Ciencias del Agua
, vol. VIII, núm. 2, marzo-abril de 2017, pp. 61-70
Chen
et al.
,
Reactivation of hypersaline aerobic granular sludge after low temperature storage
ISSN 2007-2422
•
Figure 3. Variation of dehydrogenase activity (DHA) during reactivation.
Figure 4. Variation of ammonia (NH
4
+
-N) removal during reactivation.
During the initial recovery operation period
(phase I), granules experiencing low tempera-
ture storage still presented in a good nitrification
characteristics, and removal efficiency of NH
4
+
-
N can reach to 78% at 45 mg l
-1
of influent con-
centration. It was analyzed that nitrifying bacte-
ria, which were autotrophic microbes, were less
affected by the lack of nutrients during storing.
Once the temperature and DO of reactor were
appropriate, growth activity of nitrifying bac-
teria can be recovered quickly. However, with
reactivation continuing, nitrifying characteristic
