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Sewerage pretreatment method and denitrification anaerobic hydrolytic precipitation pool

A sewage pretreatment and anaerobic hydrolysis technology, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve high cost, poor treatment effect, and affect water quality and other issues, to achieve the effect of low cost, improved efficiency, and low energy consumption

Inactive Publication Date: 2009-07-08
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a sewage pretreatment method and denitrification method to solve the problems of poor treatment effect and high cost of the existing sewage pretreatment method and the problems that the sludge floating in the existing denitrification anaerobic hydrolysis sedimentation tank affects the water quality. Anaerobic hydrolysis sedimentation tank

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  • Sewerage pretreatment method and denitrification anaerobic hydrolytic precipitation pool
  • Sewerage pretreatment method and denitrification anaerobic hydrolytic precipitation pool

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specific Embodiment approach 1

[0011] Specific Embodiment 1: In this embodiment, a sewage pretreatment method is realized by the following steps: 1. The sewage is discharged after being treated by the coarse grid, the medium grid, the drum type fine grid and the swirl grit chamber; 2. Steps One effluent enters the denitrification anaerobic hydrolysis sedimentation tank, and the maximum hydraulic load of the denitrification anaerobic hydrolysis sedimentation tank is controlled to be 4.5-6m 3 / m 2 h, the concentration of suspended sludge is 15-25g / L, the hydraulic retention time is 2.5-3h, and the ascending flow rate is 9-13m / h, that is, the pretreatment of sewage is realized.

[0012] The sewage pretreatment method in this embodiment has a removal rate of 30% to 50% for NH3-N in sewage, a removal rate for COD of 35% to 55%, and a removal rate for SS of 60% to 80%.

[0013] The pretreated sewage in this embodiment enters the biological aerated filter for advanced treatment. The discharge concentration of amm...

specific Embodiment approach 2

[0014] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the gap of the coarse grid in step 1 is 10cm; the water depth in front of the grid of the middle grid is 0.8m, the gap is 5cm, and the flow rate through the grid is 0.57m / s ; The pool volume of the cyclone grit chamber is 118m 3 , the surface load is 116.38m 3 / m 2 h, the hydraulic retention time is 40s. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the maximum hydraulic load of the denitrification anaerobic hydrolysis sedimentation tank in step two is 4.7 ~ 5.8m 3 / m 2 h, the sludge concentration is 17-23g / L, and the hydraulic retention time is 2.6-2.9h. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a sewage pretreatment method and a denitrification-anaerobic hydrolysis sedimentation tank and relates to a sewage pretreatment method and a denitrification-anaerobic hydrolysis-acidation device. The method and the sedimentation tank solve the problems that the prior sewage pretreatment method has poor treatment effect and high cost and the sludge in the prior denitrification-anaerobic hydrolysis sedimentation tank floats upwards to influence water quality. The method comprises the following steps: firstly, treating the sewage through a coarse grille, a middle grille, a rotating drum type thin grille and a rotational flow grit chamber; and secondly, hydrolysis-acidation treatment, namely, realizing pretreatment of the sewage. The denitrification-anaerobic hydrolysis sedimentation tank consists of an effluent weir, a top cap, a honeycomb inclined pipe component, a clear water zone, a suspended silt zone, a mud bucket, a water inlet pipe and a mud pipe. The method has good treatment effect and low cost for sewage pretreatment; and the denitrification-anaerobic hydrolysis sedimentation tank solves the problem that the sludge floats upwards to influence the water quality. The invention provides a pretreatment method for an aeration biological filter, and can ensure stable operation of the biological filter and the water quality of the yielding water.

Description

technical field [0001] The invention relates to a sewage pretreatment method and denitrification anaerobic hydrolysis acidification equipment. Background technique [0002] With the rapid development of my country's economy, environmental problems have become increasingly prominent. In recent years, my country has gradually increased investment in environmental protection, especially in the treatment of sewage, in order to improve the deteriorating water environment. The existing main sewage treatment technologies include activated sludge method, biofilm method and other treatment methods. Among them, the biological aerated filter method is a modified process of biofilm method, and granular fillers are mostly used to integrate biological oxidation and interception of suspended solids. The subsequent secondary sedimentation tank is saved. The operation experience shows that the use of this process can significantly save infrastructure investment and reduce the floor area. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B01D21/02C02F3/28C02F1/52
Inventor 韩洪军李雨霏王煨冬丛惠琴王英伟马文成胡宏博张凌瀚林杉
Owner HARBIN INST OF TECH
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