Biochemical pretreatment technology of high-hardness and high-salinity papermaking wastewater
A papermaking wastewater and biochemical treatment technology, which is applied in the direction of processing wastewater treatment, water/sewage treatment, water treatment parameter control, etc., can solve the problems of microbial cell membrane reverse osmosis, biochemical treatment system paralysis, microbial death, etc., and achieve the treatment effect Stable, reduced hardness and inorganic salt content, simple and easy process
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[0024] Embodiment, high hardness and high salinity papermaking wastewater biochemical treatment pretreatment process, comprises the following steps,
[0025] The physical and chemical step is to carry out physical and chemical treatment of the papermaking wastewater with high hardness and high salt content produced in the papermaking process; physical and chemical treatment is a common technology in the field of sewage treatment, and will not be repeated here. The hardness of the papermaking wastewater obtained after physical and chemical treatment is ≥800mg / l , Conductivity ≥ 4000us / cm.
[0026] In the conveying step, the papermaking wastewater after physical and chemical treatment enters the strong aeration tank by gravity.
[0027] In the strong aeration step, the strong aeration treatment is carried out through the jet aeration system controlled by frequency conversion and the misplaced perforated aeration tube installed in the strong aeration tank, and the jet aeration sy...
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