BCM (Biology Cilium Magnetic) biological sewage treatment system and BCM biological sewage treatment process

Abstract

The invention discloses a BCM (Biology Cilium Magnetic) biological sewage treatment system and a BCM biological sewage treatment process. The BCM biological sewage treatment system comprises a grill unit, a sand settling unit, a hydrolyze acidification unit, an anoxic unit, an aerobic unit, a sedimentation unit, a quick mixing unit, a quick sedimentation unit and a sterilization unit and further comprises a sludge shearing unit, a magnetic powder separation unit, a sludge concentration unit and a sludge dehydration unit, wherein sewage flows through the grill unit, the sand settling unit, thehydrolyze acidification unit, the anoxic unit, the aerobic unit, the sedimentation unit, the quick mixing unit, the quick sedimentation unit and the sterilization unit in sequence. The BCM biologicalsewage treatment process is that sewage flows through the grill unit, the sand settling unit, the hydrolyze acidification unit, the anoxic unit, the aerobic unit, the sedimentation unit, the quick mixing unit, the quick sedimentation unit, the sludge shearing unit, the magnetic powder separation unit and the sterilization unit in sequence. The invention ensures stable treatment, reaches the primary standards A of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard, and can reduce investment cost, installation cost, construction cost and running cost, simplify operation, improve running stability and reduce energy consumption; and all the quality indexes of the treated sewage are stable and meet the standards, and the effect of removing dissolvable organic matters and the denitrification effect are favorable.

Description

technical field [0001] The invention relates to a treatment process for urban domestic sewage and organic waste water, in particular to a BCM sewage biological treatment system and a BCM sewage biological treatment process whose water quality after sewage treatment can reach the first-class A standard. Background technique [0002] At present, my country has built a large number of urban sewage treatment plants. According to statistics, as of September 2010, there are 4,479 urban sewage treatment plants nationwide, of which 2,630 have been built and operated, with a daily processing capacity of 122 million cubic meters; 1,849 are under construction, with a daily processing capacity of 49 million cubic meters . Most of the treatment standards of these sewage plants are designed, constructed and operated in accordance with the Class I B standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants (GB 18918-2002)". However, with the increasingly serious pr...

AI Technical Summary

Problems solved by technology

[0005] However, there are the following problems in the above-mentioned process that can stably handle and reach the first-class A standard: (1) low-load A 2 / O, oxidation ditch and SBR process, resulting in increased biochemical unit volume, increased energy consumption, and increased dosing volume; the low-load sedimentation unit cannot guarantee the SS to meet the standard due to natural settlement

(2) The aerated biological filter unit has high construction costs and complex operations such as gas backwashing and water backwashing; fiber rotary disc filter cloth filter units generally need to bear all the pollution loads from the first-level B treatment to the first-level A. Due to the high load , filter cloth is easy to breed biofilm, which will cause blockage of filter cloth, and chemical backwashing is difficult to achieve long-term and stable results; coagulation filtration has high investment costs, is easy to block, and has poor removal effect on dissolved organic matter

(3) Membrane bioreactor (MBR) process engineering has large investment, high operating cost, complex membrane cleaning process, and unsatisfactory denitrification effect

Images