The invention discloses a method and device for efficiently and economically removing
antimony in printing and
dyeing wastewater. The
wastewater enters a reaction tank through an adjusting tank, aciddissolving
ferrous sulfate, slaked
lime and anionic
polyacrylamide are sequentially put into the reaction tank and subjected to a coagu-
flocculation reaction; the mixture enters a primary
settling tank after reacting, settled
sludge is subjected to plate-frame pressure
filtration, and separated
wastewater enters an aerobic biochemical tank; the obtained product after biochemical treatment enters asecondary
settling tank, separated
sludge back flows to the biochemical tank, and the wastewater is introduced into a secondary biochemical tank; the wastewater
after treatment enters a final
settling tank, the separated wastewater is contained in tubes if reaching a standard or is further treated and reused to a workshop, and surplus
sludge is subjected to plate-frame pressure
filtration to be incinerated. The method is easy and convenient to operate, low in medicament cost and obvious in
antimony removing effect, and the final
antimony concentration of the wastewater can be stably reduced to 100 micrograms / L or below;
aeration of the aerobic sludge tank is fully used, it is promoted that
ferrous in the wastewater is oxidized to
ferric iron, and a complexing effect and the settling performance between the
iron oxide and
antimonite are enhanced.