Recycling method for releasing sludge carbon source by using sewage plant sludge biological method

A sewage plant and biological method technology, applied in the direction of sludge treatment, biological sludge treatment, chemical instruments and methods, etc., can solve the problems of increased operating costs of sewage plants, low efficiency of biological nitrogen and phosphorus removal, and consumption of carbon sources. Achieve the effects of optimizing operating costs, broadening market prospects, and reducing drug consumption

Active Publication Date: 2021-07-02
联合环境技术(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sewage plants need to optimize the operation of the biological denitrification and phosphorus removal system to achieve a stable standard of total nitrogen and phosphorus in the effluent. The process of biological denitrification and phosphorus removal needs to consume carbon sources. The efficiency of phosphorus is low, so the sewage plant needs to add carbon sources such as glucose, sodium acetate, methanol and other synthetic carbon sources, which increases the operating cost of the sewage plant

Method used

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  • Recycling method for releasing sludge carbon source by using sewage plant sludge biological method
  • Recycling method for releasing sludge carbon source by using sewage plant sludge biological method
  • Recycling method for releasing sludge carbon source by using sewage plant sludge biological method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The concentration of the membrane pool sludge in the biochemical system of the municipal sewage plant is 1.5%, and the membrane pool sludge is added to the hydrolysis acidification reactor equivalent to the first-level side flow hydrolysis acidification tank for continuous operation for hydrolysis acidification, and the first-level side flow hydrolysis acidification The reactor operates in CSTR mode, and the CSTR operates continuously at 35°C for a hydraulic retention time of 3 days. Then, in 1 liter of reactor equivalent to the secondary side flow anaerobic fermentation tank, add 100 milliliters of sludge treated by hydrolysis and acidification of the primary side flow hydrolysis acidification reactor, which is equivalent to 10% Q of membrane tank return sludge Add 300 milliliters of sludge from an anoxic tank with a concentration of 0.9% that has been washed several times with clean water to the sludge after the first-stage side flow hydrolysis and acidification treatm...

Embodiment 2

[0048] The concentration of sludge in the secondary settling tank of the biochemical system of an industrial sewage plant is 1.2%, and the remaining sludge collected from the sludge in the secondary settling tank mixed with the sludge thickening tank is added to the hydrolytic acidification equivalent to the primary side flow hydrolytic acidification tank The reactor runs continuously for hydrolysis and acidification, and the first-stage side-stream hydrolysis and acidification reactor operates in CSTR mode, and the CSTR operates continuously at 35°C for 3 days of hydraulic retention time. Then, in the reactor equivalent to the secondary side flow anaerobic fermentation tank of 1 liter, add 100 milliliters of sludge through the hydrolysis and acidification treatment of the primary side flow hydrolysis acidification reactor, which is equivalent to the return sewage of the secondary settling tank of 10% Q Add 200 ml of sludge from the anoxic tank with a concentration of 0.6% afte...

Embodiment 3

[0050] The concentration of the membrane pool sludge in the biochemical system of the municipal sewage plant is 1.3%, and the membrane pool sludge is added to the hydrolysis acidification reactor equivalent to the first-level side flow hydrolysis acidification tank for continuous operation for hydrolysis acidification, and the first-level side flow hydrolysis acidification tank The reactor operates in CSTR mode, and the CSTR maintains a 4-day hydraulic retention time at room temperature for continuous operation. Then, in 1 liter of reactor equivalent to the secondary side flow anaerobic fermentation tank, add 100 milliliters of sludge treated by hydrolysis and acidification of the primary side flow hydrolysis acidification reactor, which is equivalent to 10% Q of membrane tank return sludge Add 250 milliliters of sludge from an anoxic tank with a concentration of 0.9% after being hydrolyzed and acidified by the primary side stream, which is equivalent to the deficiencies of the...

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Abstract

The invention discloses a recycling method for releasing a sludge carbon source by using a sewage plant sludge biological method. A part of sludge is led out from return sludge of a secondary sedimentation tank of a sewage plant or return sludge of a membrane tank to a flow measurement hydrolysis acidification system. The hydrolysis acidification system adopts a two-stage hydrolysis acidification mode, in the first stage, a continuous mixing mode is adopted to enable the sludge to release part of a carbon source, and then the sludge enters a second-stage side flow anaerobic fermentation tank; and the sludge age of the sludge is controlled in an intermittent stirring mode in the second-stage anaerobic fermentation. A part of sludge in an anoxic tank of the main flow biological nitrogen and phosphorus removal system, or returned sludge in a secondary sedimentation tank or returned sludge in a membrane tank is also led out to a side flow secondary anaerobic fermentation tank for synchronous anaerobic fermentation to generate a carbon source and denitrification reaction to remove nitrate nitrogen and nitrite nitrogen. All facilities flow from the side of the sewage plant and are smoothly coupled with existing facilities of the sewage plant, and the purposes of promoting removal of total nitrogen and reducing consumption of carbon source and chemical consumption can be achieved without adding any chemical agent in operation.

Description

technical field [0001] The invention relates to the fields of sludge treatment and sewage treatment in sewage plants, in particular to a reuse method for releasing sludge carbon sources by utilizing sewage plant sludge biological methods. Background technique [0002] Sewage plants need to optimize the operation of the biological denitrification and phosphorus removal system to achieve the stable compliance of total nitrogen and phosphorus in the effluent. The process of biological denitrification and phosphorus removal needs to consume carbon sources. The efficiency of phosphorus is low, so the sewage plant needs to add carbon sources such as glucose, sodium acetate, methanol and other synthetic carbon sources, which increases the operating cost of the sewage plant. At present, sewage plants are actively trying to reduce the chemical consumption of carbon sources on the premise of ensuring that the total nitrogen and total phosphorus in the effluent are stable. Among them, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/02C02F11/04C02F11/121
CPCC02F9/00C02F11/02C02F11/04C02F11/121C02F3/302C02F3/308C02F3/1263C02F2301/043C02F2209/06C02F2305/06C02F2209/04
Inventor 郭成洪林玉程李力阎怀国郭海军史英君洪刚苏全
Owner 联合环境技术(天津)有限公司
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