Treatment device with bio-sludge degrading and denitrogenation, and its operating method

A biological sludge and denitrification technology, applied in biological sludge treatment, biological water/sewage treatment, sludge treatment, etc., can solve the problems of difficult final disposal of sludge, high cost of sludge incineration, and troublesome operation. To achieve the effect of easy implementation and promotion, good sedimentation and dewatering performance, and no sludge agglomeration

Inactive Publication Date: 2007-03-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the sludge contains a large amount of organic matter and rich nitrogen, phosphorus and other substances, it has good economic and social benefits when used as agricultural fertilizer, but the sludge also contains pathogenic bacteria, parasite eggs and heavy metals that are harmful to plants and soil. Ions must be further processed to meet the requirements of my country's "Agricultural Sludge Pollutant Control Standards" (GB4284-84) before they can be used in agriculture.
[0005] Lack of land for landfill; sludge incineration cost is too high,

Method used

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  • Treatment device with bio-sludge degrading and denitrogenation, and its operating method
  • Treatment device with bio-sludge degrading and denitrogenation, and its operating method
  • Treatment device with bio-sludge degrading and denitrogenation, and its operating method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] As shown in Figure 1, the excess sludge 14 retrieved from the municipal sewage plant and a small amount of dairy waste water 2 are mixed and lifted to the head tank 3 at a ratio of 2:1 to 6:1. Then it flows into the first tank 4-1 of the multi-stage oxidation tank by gravity and flows into the tanks 4-2, 4-3, 4-4, the solid-liquid separation sedimentation tank and the anaerobic tank sequentially along the water flow direction. During the whole operation process, the water temperature in the multi-stage oxidation tank is kept at 20-25°C, the pH is 6-9, and the activated sludge concentration in the first tank is 5.5-6.5g / L. After the muddy water mixture at the outlet of the fourth tank settles in the solid-liquid separation sedimentation tank 8, the supernatant 9 is discharged, and the remaining sludge 10 at the bottom of the solid-liquid separation sedimentation tank is hydrolyzed by the adjacent anaerobic hydrolysis tank 11. The sludge 12 flows back along the sludge ret...

Embodiment 2

[0038] The excess sludge 14 retrieved from the urban sewage plant and a small amount of dairy waste water 2 are mixed and lifted to the head tank 3 in a ratio of 2:1-6:1. Then it flows into the first tank 4-1 of the multi-stage oxidation tank by gravity and flows into the tanks 4-2, 4-3, 4-4, the solid-liquid separation sedimentation tank and the anaerobic tank sequentially along the water flow direction. During the whole operation process, the water temperature in the multi-stage oxidation tank is kept at 20-25°C, the pH is 6-9, and the concentration of activated sludge in the first tank is 5.5-6.5g / L, and the substrate concentration and supply of each tank are flexibly controlled. oxygen conditions. After the mud-water mixture at the water outlet of the fourth tank settles in the solid-liquid separation and sedimentation tank 8, the supernatant 9 is discharged, and the reflux method of the remaining sludge 10 at the bottom of the solid-liquid separation and sedimentation t...

Embodiment 3

[0043] The biological sludge treatment device of the present invention can also be used to treat wastewater with high nitrogen content. Put the dairy product wastewater with a total nitrogen concentration of 36.3-92.2mg / L and an ammonia nitrogen concentration of 30.1-52.1mg / L into the adjustment tank 1, then lift it to the high-level tank 3, and then flow into the first tank of the multi-stage oxidation tank by gravity 4-1 and flow into 4-2, 4-3, 4-4 tanks, solid-liquid separation sedimentation tank, and anaerobic tank sequentially along the water flow direction. During the whole operation process, the water temperature in the multi-stage oxidation tank is kept at 20-25°C, the pH is 6-9, and the activated sludge concentration in the first tank is 5.5-6.5g / L. After the mud-water mixture at the water outlet of the fourth tank is settled 8, the supernatant 9 is discharged, and the reflux method of the remaining sludge 10 at the bottom of the solid-liquid separation and sedimentat...

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Abstract

The invention relates to a biological mud degrading and denitrogenating treating device and the operating method thereof, belonging to environmental protection field, especially relating to a device of strengthening predation of food chain of microbical ecosystem to degrade biological mud and denitrogenating in high performance and the operating method thereof, where the treating device comprises multistage contact oxidation tank, solid-liquid separation settling tank, and anaerobic hydrolyzing tank. And the peculiar propreties of spiral biological carriers in the multistage contact oxidation tank and the flexbilly controllable per-tank substrate concentration and oxygen supply conditions offer various microbes appropriate growth environments, thus composing an ecosystem with a food chain of bacilli, protozoans, metazoans, and senior micro animals. By the food chain, at the middle and rear stages of the multistage oxidation tank, higher microbes can largely prey on the residual mud with bacilli and other lower microbes as the main, thus largely reducing the residual mud.

Description

technical field [0001] The invention belongs to the field of using biological technology to treat sludge, and in particular relates to a device and an operation method for strengthening the predation action of the microbial ecosystem food chain to degrade biological sludge, and capable of efficiently decontaminating and denitrifying. Background technique [0002] Due to the simple process and mature technology of the activated sludge method, it has become a general method for urban sewage treatment, but the amount of sludge generated is large. The volume of sludge produced by an urban sewage treatment plant every day is 0.5% to 1.0% of the volume of sewage treatment. The cost is roughly equivalent to that of sewage treatment, and the investment in sludge treatment facilities also accounts for 30% to 40% of the total investment, or even more than 50%. [0003] According to statistics, the amount of sludge (dry weight) discharged by my country's urban sewage treatment plants ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/04C02F11/06C02F3/12
CPCY02W10/10
Inventor 汪群慧李旭东艾恒雨菊池隆重石原和美谢维民
Owner UNIV OF SCI & TECH BEIJING
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