Method for treating high-proportion organic nitrogen wastewater by controlling decant water ratio of sequencing batch reactor (SBR)
A technology with a high proportion of organic nitrogen, applied in the field of wastewater treatment with a high proportion of organic nitrogen, can solve the problems of increasing construction and operating costs of sewage treatment
Inactive Publication Date: 2012-05-02
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology
In the conventional treatment process, methods such as expanding the scale of treatment facilities, increasing aeration volume and reaction time are mostly used to reduce the concentration of organic nitrogen pollutants, but such methods greatly increase the construction and operation costs of sewage treatment
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[0016] use the attached figure 1 The high-proportion organic nitrogen wastewater is treated by a high-quality device. When the reactor influent TN concentration is 50mg / L~90mg / L, COD concentration is 900 mg / L~1300mg / L, BOD: 450~750mg / L, NO 3 - : 5~10mg / l, NO 2 - : 0.06~0.1mg / L, sludge yield coefficient Y is 0.35-0.5, control period decanting ratio R is 1.5-2.5. The temperature in the reactor was controlled at 25-35°C. After 2 cycles of continuous operation, the TN concentration in the effluent is close to 14mg / L, meeting the national first-class A emission standard.
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The invention belongs to the technical field of sewage treatment, and discloses a method for treating high-proportion organic nitrogen wastewater by controlling the decant water ratio of a sequencing batch reactor (SBR). By the method, an optimal decant water ratio is determined for an SBR process, and the problem of denitrification of the high-proportion organic nitrogen wastewater is solved. The main technical scheme is that: the concentration and variation trend of a conversion product of nitrogen at each stage are detected in the SBR in which anoxic denitrification-aerobic nitrification has been realized, a relation of effluent total nitrogen (TN) concentration and the decant water ratio R is deduced through a material balance principle, and the optimal decant water quantity in a period is determined. By the technical scheme, a reasonable method is provided for treating the high-proportion organic nitrogen wastewater by the anoxic-aerobic SBR process.
Description
technical field [0001] The invention relates to a method for treating high-proportion organic nitrogen wastewater. By adjusting the decanting ratio of the SBR reactor, microorganisms in the reactor can efficiently and stably remove organic nitrogen pollutants in the sewage, so that the effluent quality can meet relevant national regulations. standard. Background technique [0002] As a mature sewage treatment process, the SBR process has the characteristics of small footprint and high degree of automation, and has been widely used in various fields of sewage treatment. Its treatment goes through the stages of water inflow, reaction, precipitation, decanting, and waiting. Among them, the decanting stage, the decanting ratio, that is, the ratio of the remaining water after the SBR decanting to the decanting amount, has always been controversial and confused in the industry, and there is still no solution. A clear data. [0003] In the process of biochemical denitrification,...
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Inventor 傅金祥蔡仲秋张荣新唐玉兰马兴冠郜玉楠唐睛由昆
Owner SHENYANG JIANZHU UNIVERSITY
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