Immersion Type MBR Technology Handling The Research Of City Sewage

This paper title source " the certain city sewage factory project of 2 issue", analysing emphatically have discussed the following surface of all sides content:1,This sewage factory project handling of 2 issue scale is 30000m3/d, reusing water quantity ask to not be lower than 20000m3/d., project program covers an area of 16.7 mus. Into water NH3-N and TN density, it is higher, just this city land place northwest region, annual minimum temperature for subzero 18.2℃, so winter temperature takes off nitrogen effect influence for water factory is relatively obvious. Is so on the option of main technology, should pay attention following at two o'clock:(1) consideration the strict restriction that gets place factor, it is exceptional that this body processing of factory owner has been unfit for long, construction thing area to be unfit for; (2) consider to take off nitrogen effect, the technology adopted need to be reinforced to take off nitrogen function.Is the circulating recycling of water because of the city leading goal of sewage disposal of our country, so the technology of sewage disposal should be 2 level effluents directly reach to reuse water standard. Paper determines to satisfy with the technology of immersion type MBR (iMBR) as main technology and effluent" city miscellaneous use water water standard " eventually(GB/T18920-2002) requirement.2,It is high to think generally that relative to the traditional responser of activated sludge, membrane biological responser handles the operation cost of municipal sewage, and it is to cause MBR to run the most major factor with high cost that membrane pollutes. The 3 paper stages of having studied the pollution of membrane as well as the pollutive mechanisms of different stage, and have suggested further that control membrane is pollutive and the method of obstruction.3,MBR technology is runing process, reasonable operating and operation control is important, includes membrane aeration strength, mud age, biological aeration and the mud density in biological responser mainly, is also mutual connection however each between factor, is restricted each other. Paper has decided dynamics constant, biological operation parameter, membrane operation data and aeration operation data aimed at certain city sewage factory into water water quality, have calculated biology parameter, membrane parameter, membrane operation parameter and aeration system.