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Method for improving denitrification effect of sewage treatment
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A technology for sewage treatment and denitrification, which is applied in water/sludge/sewage treatment, natural water treatment, food industry wastewater treatment, etc. It can solve the problems of waste of resources and high treatment costs, save treatment costs, and achieve simple operation techniques. The effect of saving the cost of carbon-containing additives
Pending Publication Date: 2021-06-04
NANYANG INST OF TECH
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[0004] The present invention provides a method for improving the denitrification effect of sewage treatment in order to overcome the defects of high processing cost and waste of resources caused by direct discharge of residues extracted from bioethanol tank liquid after treatment in the prior art
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Embodiment 1
[0020] A method for improving the denitrification effect of sewage treatment, specifically comprising the following steps:
[0021] S1, the bio-ethanol residue extract: 2500m 3 / d, chemical oxygen demand COD=3000mg / L, COD:TN=543:5, mixed with domestic sewage treatment plant influent wastewater in the anaerobic section to obtain mixed wastewater for joint treatment;
[0022] Among them, wastewater from domestic sewage treatment plants: 79130m 3 / d, COD=305mg / L, total nitrogen TN=31mg / L, ammonianitrogen content NH 3 -N=24mg / L, carbon-nitrogen ratio COD:TN=48:5, after mixing with bioethanol residue liquid extract, 81630m 3 / d, COD=387mg / L, TN=31mg / L, NH 3 -N=24mg / L, the carbon-nitrogen ratio COD:TN=63:5, the carbon-nitrogen ratio is significantly improved, which meets the needs of microbial treatment of sewage;
[0023] S2, adopt anaerobic-anoxic-aerobic (ie A 2 / O process) and advanced treatment process, and control the oxygen supply in the anoxic stage in the anaerobic-an...
Embodiment 2
[0026] A method for improving the denitrification effect of sewage treatment, specifically comprising the following steps:
[0027] S1, the bio-ethanol residue extract: 2500m 3 / d, chemical oxygen demand COD=4000mg / L, COD:TN=152:1, mixed with domestic sewage treatment plant influent wastewater in the anaerobic section to obtain mixed wastewater for joint treatment;
[0028] Among them, wastewater from domestic sewage treatment plants: 79130m 3 / d, COD=305mg / L, total nitrogen TN=31mg / L, ammonia nitrogen content NH 3 -N=24mg / L, carbon-nitrogen ratio COD:TN=48:5, after mixing with bioethanol residue liquid extract, 81630m 3 / d, COD=418mg / L, TN=31mg / L, NH 3 -N=24mg / L, the carbon-nitrogen ratio COD:TN=67:5, the carbon-nitrogen ratio is significantly improved, which meets the needs of microbial treatment of sewage;
[0029] S2, adopt anaerobic-anoxic-aerobic (ie A 2 / O process) and advanced treatment process, and control the oxygen supply in the anoxic stage in the anaerobic-an...
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Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to a method for improving the denitrification effect of sewage treatment, and the method specifically comprises the following steps: S1, mixing a bioethanol vinasseliquid extract with wastewater of a sewage treatment anaerobic section of an urban sewage treatmentplant to obtain mixed wastewater; and S2, treating the mixed wastewater. According to the method for improving the denitrification effect of sewage treatment provided by the invention, the denitrification effect of sewage treatment of an urban sewage treatment plant can be remarkably improved, and a domestic sewage treatment process is not influenced; therefore, the invention solves the problems that in the prior art, the treatment cost of the two kinds of wastewater is high, and resource waste and environmental pollution are caused by direct discharge of the bioethanol vinasseliquid extractafter treatment; and the economic benefit, the environmental benefit and the social benefit are remarkable.
Description
technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for improving the denitrification effect of sewage treatment. Background technique [0002] Urban sewage treatment plants mainly treat urban domestic wastewater, which can only be discharged after reaching national standards. However, in the process of sewage treatment, the carbon-to-nitrogen ratio must be appropriate to achieve the ideal treatment effect. The domestic wastewater treated by urban sewage treatment plants contains high nitrogen content. The lack of carbon sources leads to unsatisfactory treatment results, and the discharge of wastewater cannot meet the standards, which not only wastes energy, but also increases the treatment cost of sewage treatment plants. For this reason, most sewage treatment plants are looking for suitable treatment methods. One of the methods is to add carbon sources to sewage to increase the carbon-to-nitrogen ra...
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