Mechanical filter applied in purifying waste water depth

As we all know, the industrial sewage wastewater, after treated with biochemical and air flotation, the impurities such as suspended solids could still can not meet the discharge standard, you will need to depth filtration process.
relative mechanical filter, biochemical treatment should be thick, pretreatment, biochemical pool however good control of the good is not so easy thing, every moment of the detection of various water quality indicators, the difficulty is a little big, if the operation is not in the normal range of various parameters, such as drainage probably won't be as indicator, so suggest behind use mechanical filter depth processing.
mechanical filter in conventional wastewater advanced treatment with quartz sand filter, activated carbon filter, many media filters, they are by intercepting, adsorption to remove the impurities in the water, again through the backwashing, is wash to intercept the pollution discharge recoil out, so that we can achieve the circulation purification effect. Cooperate with PAC and PAM flocculating agent, the effect will be better.