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Hydrated matrix manufacturing and advanced treatment technology for biological treatment tail water of landfill percolate

A biological treatment and advanced treatment technology, applied in the direction of adsorption water/sewage treatment, oxidation water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. High cost and other problems, to achieve the effect of simple process flow, reducing raw material investment costs, and reducing CODCr

Inactive Publication Date: 2010-11-10
SHANGHAI ZIXIN ENVIRONMENTAL & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water quality index can only be close to or reach the national leachate collection standard (COD<1000mg / L), and it is often necessary to use physical and chemical treatment processes for advanced treatment, but some advanced treatment technologies commonly used at present, such as: reverse osmosis, activated carbon Adsorption, Fenton (Fenton) oxidation, electrolytic treatment, etc., due to the high cost of treatment and complicated operation, it is not suitable for the large-scale treatment of leachate.

Method used

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  • Hydrated matrix manufacturing and advanced treatment technology for biological treatment tail water of landfill percolate
  • Hydrated matrix manufacturing and advanced treatment technology for biological treatment tail water of landfill percolate
  • Hydrated matrix manufacturing and advanced treatment technology for biological treatment tail water of landfill percolate

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Experimental program
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Effect test

Embodiment 1

[0043] According to the above implementation steps, in this embodiment:

[0044] Filler: The designed water-cement ratio is 10:1, 20:1, 40:1 respectively, the hydration base is 12.5-50g, and the leachate tail water is fixed at 500mL, which is added to the reactor respectively, and the control speed is as low as possible, about 120r / min, react for 24 hours, let it settle for 2 hours, and take the supernatant to measure its water quality index.

[0045] The influent of the reactor is the effluent of the existing leachate treatment process of a tidal flat landfill in Shanghai, and its specific properties are shown in Table 1 below:

[0046] Table 1 Influent leachate tail water quality index (mg / L)

[0047] pH

[0048] From figure 1 It can be seen from the figure that the effect of cement on the treatment of tail water is very obvious. After treatment, the COD of tail water can be reduced to 148mg / L, and the removal rate is as high as 69.5%, which meets the secondary ...

Embodiment 2

[0050] The influent of the reactor is the effluent of the existing leachate treatment process of a tidal flat landfill in Shanghai, and its specific properties are shown in Table 1 below:

[0051] Table 2 Influent leachate tail water quality index (mg / L)

[0052] pH

COD

BOD 5

TOC

Conductivity (μs / cm)

NH 3 -N

NO 3 -N

TN

TP

8.03

569

3.691

164

869

174

259

489

6.472

[0053] The water-cement ratio of the feed is 10:1, the speed is as low as possible, about 120r / min, reacted for 24 hours, allowed to settle for 2 hours, and took the supernatant to measure its water quality index.

[0054] The experimental results of continuous batch treatment show that, without replacing the reactive cement, the effluent COD can be kept below the national secondary discharge standard within 7 days, and below 200mg / L within 3 days. After 6d, the effluent COD began to rise rapidly ( image 3 ), indi...

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Abstract

The invention relates to a hydrated substrate medicament manufacturing and advanced treatment technology for biological treatment tail water of landfill percolate, belonging to the technical field of waste water treatment. The hydrated substrate medicament of the invention is prepared by the following steps: mixing calcium carbonate, silicon oxide, aluminum oxide, ferric oxide and sludge dried to about 80% as substrates in respective proportions of 71-78%, 12-15%, 2.0-4.0% and 10-20%, grinding evenly to completely pass through a 0.08mm sieve, adding an amount of water and mixing to be homogeneous wettability, forming, calcining at the respective calcining temperature of 1300 DEG C and 1450 DEG C, blending 5% of gypsum in the clinker in reaction, and milling by a ball mill until the sieve residue through the 0.080mm sieve is not greater than 12% to obtain the hydrated substrate material for treating the percolate. In the advanced treatment technology, the hydrated substrate medicament and the percolate tail water generally in proportion of 10-40:1 (mass ratio) for addition are added, intermittent reaction in a reactor is adopted, and the stirring rate is kept at 50-150rpm, the treated effluent water deposits in a collecting tank, and the supernatant is discharged. The invention has lower basic construction and operating cost, convenient operating maintenance and high degree of automation.

Description

technical field [0001] The invention relates to a purification device and method in the technical field of waste water treatment, in particular to a preparation method and treatment technology for an advanced treatment agent for landfill leachate biological treatment tail water. Background technique [0002] At present, the volume of urban domestic waste removal and transportation in my country is increasing at an average annual rate of more than 8%. The annual output of leachate from controllable point source discharge of domestic waste is about 29 million tons, and the pollutants contained in one ton of leachate are equivalent to 100 tons. At the same time, due to the characteristics of high toxicity, complex water quality, large fluctuations in water volume, high concentration of organic matter and ammonia nitrogen, and imbalance of nutrient elements, the leachate has no perfect process for its effective treatment, and some of them have not undergone any treatment. Direct d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/52C02F1/72
Inventor 楼紫阳
Owner SHANGHAI ZIXIN ENVIRONMENTAL & TECH
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