The invention discloses an
antimony and
manganese removal
water treatment system and method based on feedforward-
feedback control, and belongs to the technical field of
water treatment. When the
antimony concentration of inflow water is abnormal, pH pre-adjustment is carried out through an acid adding device before coagulation, after the pH is precisely reduced to a target value, an iron salt coagulant is added,
antimony is removed through coagulation and
precipitation procedures, the pH is adjusted back through an alkali adding device before
filtration, and it is ensured that the
effluent water reaches the standard. And when the
manganese concentration of the settled water exceeds the standard, synchronous removal of
manganese is realized by utilizing the
adsorption effect of specific filter sand in the filter tank. According to the method, the detection device and the
control system are integrated, the feed-forward-feedback mechanism is used for optimizing
pH regulation and control and agent adding in real time, the problems that in a traditional method,
pH control is difficult, low-concentration antimony removal is unstable, the manganese adsorption capacity is limited and the like are effectively solved under the condition that a process unit does not need to be newly added, cooperative, efficient and stable removal of antimony and manganese is achieved, and the method is suitable for large-scale industrial production. And the discharged water continuously meets the
limit value requirements of the Sanitary Standard for Drinking Water.