Continuous flow operation method for prompting continuous flow sewage treatment system to achieve short range nitration quickly
A sewage treatment system, short-range nitrification technology, applied in water/sludge/sewage treatment, chemical instruments and methods, aerobic and anaerobic process treatment, etc., can solve problems such as unstable effect, long cycle of starting short-range nitrification, etc. Achieve the effects of stable short-range effect, short start-up period, and high ammonia nitrogen nitrification rate
Active Publication Date: 2014-12-03
北控水务(中国)投资有限公司
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[0004] The purpose of the present invention is to provide a continuous flow operation method for prompting the continuous flow system to quickly realize short-range nitrification, and to provide a solution for the problems such as long start-up period and unstable effect of short-range nitrification in the continuous flow faced by the sewage treatment industry. Wastewater treatment plant offers options for upgrading continuous flow systems
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[0019] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing and example:
[0020] (1) Set the operation mode of continuous flow; figure 1 Shown is a schematic diagram of the continuous flow system modified according to the present invention, the continuous flow is transformed into four continuous sections (20-23), each section consists of anoxic zone (4) and aerobic zone ( 5) Composition, the effluent from the aerobic zone in the previous section flows into the anoxic zone in the next section, and the effluent from the aerobic zone in the last section enters the secondary sedimentation tank (16) through the biochemical tank outlet pipe (15) to achieve mud-water separation; the last aerobic zone A nitrifying liquid return pipe (9) and a nitrifying liquid return pump (11) are provided to connect the anoxic zone of the first section; the outlet water of the secondary settling tank is discharged through the outlet p...
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A continuous flow operation method for prompting a continuous flow sewage treatment system to achieve short range nitration quickly belongs to the field of sewage treatment by using a biochemical process. According to the invention, by using the characteristics that the activity of nitrite oxidizing bacteria is restrained under an anoxic condition and is slow in recuperate under an aerobic condition, a continuous flow system is modified to be a four-section anoxic-aerobic alternating operation way, and the nitrite accumulation rate is improved stage by stage; the nitrite oxidizing bacteria in the system can be washed through a spoil disposal way, and a stable short range nitration effect is eventually achieved. Practice shows that the nitrite accumulation rate can reach more than 80 percent in about one sludge age after the system is started. Compared with a short range nitrifying method for achieving a continuous flow system by depending on dissolved oxygen, the continuous flow operation method provided by the invention has the advantages of short period, relatively stable short range effect, high nitration rate, capacity of low possibility of sludge expansion and the like, can serve as a quick starting method aiming at short range nitration of the continuous flow system, and is applicable to continuous flow sewage treatment systems with various scales.
Description
technical field [0001] The invention relates to a continuous-flow operation method for rapidly realizing short-range nitrification in a continuous-flow sewage treatment system, belongs to the technical field of biochemical sewage treatment, and is applicable to municipal sewage treatment plants of different scales adopting a continuous-flow system. Background technique [0002] Activated sludge method is currently the most widely used sewage purification method in the world, with the advantages of stable effect, high efficiency and low cost. Sewage treatment systems are mainly divided into two categories according to their water intake and reaction methods: continuous flow systems and sequencing batch systems. Among them, the continuous flow system is mainly composed of a biochemical reaction tank and a secondary sedimentation tank. The sewage continuously enters the front section of the biochemical reaction tank and mixes with activated sludge to form a mud-water mixture. T...
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IPC IPC(8): C02F3/30C02F101/16
Inventor 彭永臻杨雄宋姬晨
Owner 北控水务(中国)投资有限公司
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