Oxygen Potential Ecological Wastewater Treatment Beds For New Technology Introduction - Water,

In order to restore the dissolved oxygen in water (ie

, DO), the existing mature Sewage Most treatment processes based on double reaeration Membrane Theory using diffused aeration, learned tons of sewage treatment 1 application at least Roots blower power 0.4Kw / h, plus the need to eliminate the cost of Roots blower noise, construction costs and additional administrators fan room costs, the total expenditure has been high operating costs of sewage treatment plants the major part, especially when the sewage treatment requirements to achieve "urban sewage treatment plant pollutant discharge standard" (GB18918-2002) Grade A standards, the only "blast aeration" The cost will increase several times. Hohai University Environment Science and Engineering discussion group began in 1988 after 20 contained 7 on behalf of the Process Improvement, give full play to the advantage of the advantages of low cost hydropower, developed using water (potential energy) in biological wastewater treatment process?? Potential oxygen Eco-bed method, creating a water resources and environmental studies discipline typical combination proposed development of a new environmental studies research, task force member Professor Chen Mingzhao 17, accepted an interview with reporters and provided the following data.

The principle is: When the effluent from the first layer into the oxygen machine 1, the water bottom-up movement, and which carry the suspended solids from bottom to top are retained, when the water level rises to the oxygen machine in the siphon 3 and over the top after the siphon is generated, and soon the floor drain sewage into the next level, this time carrying water from the top down movement of suspended material trapped (by the small pores is a smooth movement to the large pore ) also into the next level (which is also at every level Filler The reasons for not blocking), while filling the air inhaled into the pores 2, the air along the bottom with large particle pores fill in all contact with the atmospheric water film reoxygenation, making dissolved filler surface water film rapid increase in oxygen (see the two-film theory of reaeration). Potential eco-bed facilities in full use oxygen water Pump The head potential energy (10 ~ 15m) to the atmosphere reoxygenation, a continuous 30-layer water reaeration can increase the dissolved oxygen rapidly.

When each layer of the water is dry, the siphon automatically disconnected, and there is some interval of time, it makes the filling in the water film is full of reaeration time, and because a thin water film, in which the dissolved oxygen close to the saturation value quickly, so suitable for packing in a biofilm in the aerobic decomposition of sewage microbial growth and quickly. As the water continued to enter, the floor level has been rising, siphon again, again and again, and one level down from the layer, layer by layer transfer, to the bottom through the secondary settling tank, the suspended solids carried by precipitation, the supernatant water time and through the eco-turf, as the role of capillary water and organic matter (nitrogen, phosphorus) transport to the upper soil layer and cover the turf, in addition to nitrogen, phosphorus, and can be reached in the water or surface water standard grade .

Direct economic benefit of the technology: in the mountains when the river dropped more than 1% to 3%, the direct operating costs of sewage treatment is zero, in the plain area, when the tariff is 0.6 yuan / kWh, only be 0.15 yuan / ton in the direct operating costs. Recently won the national Department of Environmental Protection has promulgated the "2008 Environmental protection Science and Technology Award "third prize, and the successful application of the 11 sewage treatment projects, including the 1999 Nanjing bloom food high concentration wastewater treatment plant project in 2000, Jingjiang secondary sewage treatment projects, Coking Gas Company in 2001 in Yangzhou wastewater treatment project in 2004, Jianye District, Nanjing, pumping river water treatment project management office.

by: gaga

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