Can the BOD5 of the effluent after hydrolytic acidification of refractory wastewater be higher than that of the influent?

2016-08-02View Original

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Can the BOD5 of the effluent after hydrolytic acidification of refractory wastewater be higher than that of the influent?

Reply #22016-08-02

First, it is necessary to examine the quality of the wastewater to determine whether the hard-to-degrade substances are only difficult to degrade or completely indegradable. It is recommended to give it a try; generally, this can lead to some improvement (as the hard-to-degrade substances are broken down). In some cases, no change occurs (since the hard-to-degrade substances cannot be degraded). In other cases, the BOD level decreases (because the hard-to-degrade substances cannot be degraded, so the BOD does not increase; instead, the hydrolysis-acidification tank consumes BOD, resulting in a decrease in BOD levels).

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