Abstract
The invention discloses a seven-segment deep denitrification biochemical treatment method, and belongs to the field of sewage treatment. The seven-segment deep denitrification biochemical treatment method comprises a water inlet channel, a hypoxic precondition zone, an anaerobic zone, an anoxic zone, an MBBR (Moving Bed Biofilm Reactor) aerobic zone, a low dissolved oxygen aerobic zone, a postposed anoxic zone, a postposed aerobic zone and a water outlet channel, wherein the water inlet channel is separately communicated with the anoxic zone, the anaerobic zone and the hypoxic precondition zone through a water inlet of the anoxic zone, a water inlet of the anaerobic zone and a water inlet of the hypoxic precondition zone; the MBBR aerobic zone is communicated with the low dissolved oxygenaerobic zone through a rectangular water through hole formed in the upper part of one side of a baffle wall between the MBBR aerobic zone and the low dissolved oxygen aerobic zone; the MBBR aerobic zone is internally provided with guide walls and bottom perforated aerator pipes, and suspended carriers are added in the MBBR aerobic zone. The seven-segment deep denitrification biochemical treatmentmethod disclosed by the invention overcomes the defect of insufficient deep denitrification effect in the prior art, and can be applied to upgrading and reconstruction of an existing sewage treatmentfacility having higher denitrification requirements and construction of new facilities.
Description
technical field
[0001] The invention relates to a seven-stage deep denitrification biochemical treatment method, which belongs to the field of sewage treatment. Background technique
[0002] The increasing pollution of water resources is the main reason for the shortage of water resources in our country. The reuse of urban reclaimed water is an effective way to solve the urban water crisis. At present, more than 70% of the landscape water bodies in Beijing are recharged with reclaimed water. Landscape water bodies have strict requirements on the content of nitrogen and phosphorus in water, and excessive discharge will cause eutrophication of water bodies. A large number of studies have proved that nitrogen and phosphorus in sewage are the main cause of eutrophication in receiving water bodies. The quality of effluent water generally cannot meet the indicators for landscape water use, and it must undergo deep nitrogen and phosphorus removal before it can be applied to the la...
