(a)
(b)
Figure 4: The process of PA accumulation and pH change of the Cyanothece sp. PCC7822 (a) and the influence of initial pH on the efficiency of DMP biodegradation by Synechocystis sp. PCC6803 (6803), Synechococcus sp. PCC7942 (7942), and Cyanothece sp. PCC7822 (7822) (b).