If the sludge is found black during the operation of the filter press

- Jun 28, 2019-

If the sludge is found black during the operation of the filter press


Cause:


The dissolved oxygen in the aeration tank is too low, and the anaerobic decomposition of organic matter releases H2S, which reacts with Fe to form FeS.


  Solution:


Increase the oxygen supply or increase the return sludge. As long as the dissolved oxygen in the aeration tank is increased, the sludge will gradually return to normal in about 10 hours.