Sewage advanced treatment process

An advanced treatment and process technology, applied in the field of water pollution control, can solve the problems of large aeration volume, easy impact on biofilm, uneven oxygen distribution, etc., and achieve the effect of high removal rate and strong coagulation effect.

Active Publication Date: 2018-02-02
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a sewage advanced treatment process, which solves the problem of large aeration volume, high energy consumption, easy impact on biofilms, b

Method used

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Embodiment 1

[0033] A sewage advanced treatment process, comprising the following steps:

[0034] Step 1. After the secondary treatment, the effluent enters the coagulation tank, and the composite adsorbent is added to the coagulation tank. After the addition is completed, it is stirred at a speed of 200r / min for 15 minutes. ;

[0035] Wherein, the composite adsorbent is composed of the following components in parts by mass: 5 parts of polyaluminum ferric chloride, 40 parts of oligosaccharide-modified medical stone, and 10 parts of modified semi-coke;

[0036] The dosage of the composite adsorbent is 3kg per ton of waste water;

[0037] Step 2, the effluent from the coagulation tank enters the biofilter, and the biofilter is filled with biological fillers, the biological fillers are mixed with modified porous ceramic particles and compound algae bacterial agents according to the mass ratio of 15:1. The biofilter adopts micro-aeration to provide oxygen, and the gas-water ratio in the biof...

Embodiment 2

[0046] A sewage advanced treatment process, comprising the following steps:

[0047] Step 1. After the secondary treatment, the effluent enters the coagulation tank, and the composite adsorbent is added to the coagulation tank. After the addition is completed, it is stirred at a speed of 250r / min for 12 minutes. ;

[0048] Wherein, the composite adsorbent is composed of the following components in parts by mass: 8 parts of polyaluminum ferric chloride, 35 parts of oligosaccharide-modified medical stone, and 15 parts of modified semi-coke;

[0049] The dosage of the composite adsorbent is 2kg per ton of waste water;

[0050] Step 2, the effluent from the coagulation tank enters the biofilter, and the biofilter is filled with biological fillers, the biological fillers are mixed with modified porous ceramic particles and compound algae bacterial agents according to the mass ratio of 12:1, the resulting The biofilter adopts micro-aeration to provide oxygen, and the air-water rat...

Embodiment 3

[0056] A sewage advanced treatment process, comprising the following steps:

[0057] Step 1. After the secondary treatment, the effluent enters the coagulation tank, and the composite adsorbent is added to the coagulation tank. After the addition is completed, it is stirred at a speed of 300r / min for 10 minutes. ;

[0058] Wherein, the composite adsorbent is composed of the following components in parts by mass: 10 parts of polyaluminum ferric chloride, 30 parts of oligosaccharide-modified medical stone, and 20 parts of modified semi-coke;

[0059] The dosage of the composite adsorbent is 1kg per ton of waste water;

[0060] Step 2, the effluent from the coagulation tank enters the biofilter, and the biofilter is filled with biological fillers, which are mixed with modified porous ceramic particles and compound algae bacterial agents in a mass ratio of 10:1. The biofilter adopts micro-aeration to provide oxygen, and the air-water ratio in the biofilter is set to be 3:1, and ...

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Abstract

The invention discloses a sewage advanced treatment process. The sewage advanced treatment process particularly comprises the following operation steps: enabling output water after secondary treatmentto enter a coagulation pool, adding a composite adsorbent into the coagulation pool, and obtaining coagulation pool output water after reaction; enabling the coagulation pool output water to enter abiological filter, and obtaining biological filter output water after reaction, wherein biological filters are formed by mixing modified porous ceramic granules and composite alga microbial inoculum according to the mass ratio of (10-15):1; enabling the biological filter output water to enter an electrodialytic cell, performing separation and concentration to obtain fresh water and concentrated water separately, enabling the concentrated water to return to the coagulation pool in the step 1 to perform circulation treatment, and taking the fresh water as electrodialytic cell output eater to perform next-step treatment; adding a disinfector into the fresh water from the electrodialytic cell to perform disinfection, and after detection qualification, discharging or performing farming irrigation. According to the sewage advanced treatment process, the garbage percolate secondary treatment output water is subjected to advanced treatment by efficient flocculation, biological filter and electroosmosis treatment methods, the treatment efficiency is high, the effect is good and the output water can meet the up-to-standard discharge and recycling requirements.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a sewage advanced treatment process. Background technique [0002] Landfill leachate is the product of gravity flow of liquid in the landfill, mainly from precipitation and the embedded water of the waste itself. Since many factors may affect the properties of the leachate during the flow of the liquid, including physical factors, chemical factors and biological factors, the properties of the leachate vary within a considerable range. Generally speaking, its pH value is between 4-9, COD is in the range of 2000-62000mg / L, BOD 5 From 60-45000mg / L, the concentration of heavy metals is basically the same as that in municipal sewage. The leachate of urban waste landfill is a kind of high-concentration organic wastewater with complex components. If it is directly discharged into the environment without treatment, it will cause serious environmental polluti...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/281C02F1/283C02F1/4693C02F1/50C02F1/52C02F3/02C02F3/107C02F3/325C02F3/34C02F9/00
Inventor 孙垦
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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