Standard reaching to ground surface water grade IV water urban sewage treatment process
A technology for urban sewage and treatment process, applied in water/sewage treatment, biological water/sewage treatment, oxidized water/sewage treatment, etc. problems, to facilitate industrialization and large-scale promotion, save iron-based or aluminum-based salts, and improve the effect of denitrification
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[0031] A kind of magnetically loaded sludge collection and separation equipment and treatment method of the present invention will be further described below in conjunction with accompanying drawing:
[0032] (1) Urban sewage is pretreated to remove sand, stone and large particulate matter in sewage; to ensure the stability of biochemical reactions in the later stage; the pretreatment step is to pretreat sewage through grilles, grit chambers or primary sedimentation tanks .
[0033](2) After pretreatment, the sewage is divided into two parts of sewage; part of the sewage (10% to 40%) is fully mixed with the muddy water returned from the secondary settling tank and then enters the pre-denitrification tank, and the organic matter (suspended solids SS and Dissolved organic matter) and nitrate (nitrate nitrogen, nitrite nitrogen) in the return sludge water to carry out pre-denitrification reaction to remove nitrate nitrogen and organic matter in the return sludge, and reduce the i...
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