Device and method for realizing shortcut nitrification of sludge-digestion liquid by combined control of FA and FNA

A technology of sludge digestion liquid and short-range nitrification, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc.

Active Publication Date: 2008-10-15
BEIJING DRAINAGE GRP CO LTD
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  • Claims
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Problems solved by technology

High NH 4 + Stable and efficient short-range biological denitrification of -N sludge digestate is a recognized problem in biological denitrification of sewage, especially the realization of short-range biological denitrification of sludge digestate in continuous flow activated sludge reactors at room temperature has not been reported

Method used

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  • Device and method for realizing shortcut nitrification of sludge-digestion liquid by combined control of FA and FNA

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Embodiment 1

[0029] The present invention realizes the short-range nitrification method of sludge digestion liquid through the joint control of FA and FNA,

[0030] The sludge digestate is taken from the digested sludge dehydration workshop of Beijing Gaobeidian Urban Sewage Treatment Plant, which is a typical sludge digestate. The water quality of the sludge digestion liquid: COD 100~250mg / l; NH 4 + -N 250~400mg / l; SS 30~100mg / l; alkalinity 1200~2300mg / l; TP 20~35mg / l; pH 7.0~7.6. The sludge digestate is a typical high NH 4 + -N sludge digestate with low C / N ratio. As shown in Figure 1, the test consists of a raw water tank, a short-range nitrification reactor, a sedimentation tank, and an outlet tank. The effective volume of the raw water tank is 500L. The effective volume of the short-path nitrification reactor is 45L, and the size of the reactor is L×B×H=90×10×50cm, which is divided into 9 compartments on average. Anoxic stirring zone, compartments 2 to 9 are aerobic short-range...

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Abstract

The invention discloses a device which can realize the shortcut nitrification of sludge-digestion liquid through the combined control of FA and FNA. The device is provided with a raw water box, a shortcut nitrification reactor, a sedimentation tank and a water tank; the shortcut nitrification reactor is divided into a hypoxia stirring area and an aerobic zone, and a DO/pH online controller is arranged in the aerobic zone; an air-blast-head is arranged at the bottom of the reactor; a method utilizing the device to realize the shortcut nitrification comprises the following steps: firstly, a system is started; and secondly, the adjustment is carried out in running; the invention is applicable to the nitrification of the sludge-digestion liquid of a sewage treatment plant, the structure of the device is simple, the process of the method is simple, the operation is convenient, a plurality of carbon sources are saved, the nitrification speed is fast, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment by biochemical method, a device and a method for realizing short-range nitrification of sludge digestion liquid through joint control of free ammonia FA (Free Ammonia) and free nitrous acid FNA (Free Nitrous Acid), which is suitable for urban sewage treatment Plant sludge digestion liquid and other high ammonia nitrogen (NH 4 + -N) Treatment of organic industrial wastewater. Background technique [0002] my country's water pollution continues to intensify, and the shortage of water resources has restricted the development of China's economy and society, making the discharge standards of urban sewage plants continue to increase, and the recycling of sewage has become the general trend. Large amounts of residual sludge generated during municipal wastewater treatment are usually disposed of in digesters and methane recovered. However, due to the anaerobic ammonification of orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/30
CPCY02W10/10
Inventor 张树军甘一萍韩晓宇周军常江王洪臣彭永臻
Owner BEIJING DRAINAGE GRP CO LTD
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