An artificial rapid percolation system for enhanced denitrification

An artificial rapid percolation and denitrification technology, which is applied in chemical instruments and methods, aerobic and anaerobic process treatment, granular microbial carrier treatment, etc., can solve the problem of low removal efficiency of total nitrogen, and achieve simple structure and high treatment efficiency. Good effect, small footprint

Active Publication Date: 2019-05-03
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low removal efficiency of total nitrogen in the existing artificial rapid infiltration system, and to provide an artificial rapid infiltration system for strengthening denitrification

Method used

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  • An artificial rapid percolation system for enhanced denitrification
  • An artificial rapid percolation system for enhanced denitrification
  • An artificial rapid percolation system for enhanced denitrification

Examples

Experimental program
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experiment example 1

[0046] Taking the domestic sewage of a community in Xipu Town, Pi County as the treatment object, the sewage water quality is as follows: COD, NH 4 + -N, TN, TP, SS concentrations are 230.1~270.5mg / L, 30.2~39.6mg / L, 37.9~46.5mg / L, 3.1~4.2mg / L, 150~400mg / L, pH is 6.8~7.6 . CRI1 and CRI2 use the same water quality to feed water at the same time to eliminate the impact of water quality fluctuations on the system operation effect. Simple pretreatment is performed on domestic sewage before water intake to remove large suspended solids and sediments.

[0047] The operation mode is as follows: CRI1 water intake adopts the alternate operation mode of flooding / drying / staying, the hydraulic load is 0.75m / d, the hydraulic load cycle is 8h, of which the aerobic nitrification stage is 3h, the wet-dry ratio is 1:3, and it enters the anoxic compound After the denitrification section, stay for 5 hours, and then discharge from the water outlet; CRI2 water intake adopts the method of flooding...

experiment example 2

[0058] Taking a eutrophic lake in Xipu Town, Pi County as the treatment object, the sewage water quality is as follows: COD, NH 4 + -N, TN, TP, SS concentrations are 20.5~35.8mg / L, 1.8~4.8mg / L, 3.2~8.6mg / L, 0.37~0.66mg / L, 45~115mg / L, pH is 7.2~7.8 . CRI1 and CRI2 use the same water quality to feed water at the same time, so as to eliminate the influence of water quality fluctuations on the system operation effect, and perform simple pretreatment on eutrophic lake water before water intake to remove large suspended solids and sediments.

[0059] The operation mode is as follows: CRI3 water intake adopts the method of flooding / drying / staying alternately, the hydraulic load is 1.5m / d, the hydraulic load cycle is 4h, of which the aerobic nitrification stage is 2h, the wet-dry ratio is 1:4, and it enters the anoxic compound After the denitrification section, stay for 2 hours, and then discharge from the water outlet; CRI4 water intake adopts the alternate flooding / falling-drying ...

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Abstract

The invention discloses an artificial rapid diafiltration system for strengthening denitrification, which is characterized in that it comprises a rapid osmosis tank body, and the quick osmosis tank body is sequentially arranged with a water inlet section, an aerobic nitrification section, an anoxic Composite denitrification section and water outlet section. The sewage to be treated infiltrates into the aerobic nitrification section, anoxic composite denitrification section, and water outlet section sequentially from the water inlet section, and then is discharged from the water outlet installed on the side of the water outlet section. The aerobic nitrification section The section is used to remove NH4+-N, and the anoxic compound denitrification section is used to remove NO3-N. The artificial rapid infiltration system for enhanced denitrification is constructed into an integrated high-efficiency denitrification system, which can efficiently remove NH4+‑N and NO3‑‑N, and realize the standard treatment of nitrogen pollutants by the artificial rapid infiltration system. , simple structure, easy operation, small footprint, low operating cost and good treatment effect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an artificial rapid percolation system for strengthening denitrification. Background technique [0002] The artificial rapid infiltration (CRI) system has the advantages of simple process, convenient operation, and low operating cost. It is effective for COD, BOD, NH 4 + -N, SS, LAS and other pollutants have a good removal effect, especially suitable for areas where the cost of sewage treatment is relatively weak, the source of sewage is relatively scattered, and the municipal pipe network has not yet been covered. However, with the gradual consumption of organic matter in the CRI system, the C / N ratio in the lower part of the quick osmosis tank is low, and the denitrification performance is poor. In addition, nitrate nitrogen is negatively charged and has strong mobility in the substrate microenvironment , it is very easy to flow out of the system with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/302C02F2003/001
Inventor 张建强陈佼
Owner SOUTHWEST JIAOTONG UNIV
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