Method of deeply purifying consumer waste infiltration liquid difficult degradation tail water by cement-based composite material

A composite material and domestic waste technology, applied in the field of wastewater treatment, can solve the problems of huge operation and maintenance costs, high pollutant concentration, blockage of membrane components, etc., to reduce construction costs, simple regeneration process, and less secondary pollutants. Effect

Inactive Publication Date: 2007-08-15
SHANGHAI TONGJI CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main reason is that the physical and chemical treatment is usually very expensive, and the landfill cannot bear the huge operation and maintenance costs
In addition, due to the complex water quality of the leachate tail water, the concentration of pollutants is still high, which will cause some problems for the physical and chemical treatment equipment and operation, such as clogging of membrane modules, and easy scaling and precipitation during Fenton treatment, etc.

Method used

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  • Method of deeply purifying consumer waste infiltration liquid difficult degradation tail water by cement-based composite material
  • Method of deeply purifying consumer waste infiltration liquid difficult degradation tail water by cement-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Table 1 shows the water quality indicators of the leachate refractory tail water treated by the biological treatment unit of a tidal flat landfill in Shanghai.

[0024] Table 1 Leachate Tail Water Quality Index (mg / L)

[0025] Exterior

pH

COD Cr

TOC

TN

NH 3 -N

Ca 2+

Mg 2+

Cl -

SO 4 2-

brown yellow

transparent

8.14

518

172

511

155

30.2

240.8

4516

794

[0026] See Figures 1, 2, 3. First construct a permeable reaction layer in the laboratory: Weigh 60g of 425 # cement and 20 g of analytically pure CaCO 3 The powder is mixed evenly and filled into the PVC cylinder 2 above the bottom hole 5 with a diameter of 1 mm as shown in Figure 1 . The inner diameter of the PVC cylinder 2 is 5 cm, the thickness of the permeable reaction layer 4 formed after the reaction material is filled is 3.5 cm, and a height of 10 cm is left ...

Embodiment 2

[0029] Constructing a permeable reaction layer in the laboratory: Weigh 53.4 g of 425 # cement and 26.6 g of analytically pure CaCO 3The powder is mixed evenly and filled into the PVC cylinder 2 with small holes 5 (aperture 1mm) at the bottom in Fig. 1 . The inner diameter of the PVC column is 5 cm, and the thickness of the permeable reaction layer 4 formed after the reaction material is filled is 3.5 cm, and a height of 10 cm is left above the reaction layer 4 to contain the tail water column 3 . Add the leachate tail water described in Table 1 into the column evenly and intermittently through the water distributor 1 shown in Figure 1, and control the seepage water load to 0.6-0.8ml·g -1 d -1 , The seepage water 6 flows into the sump 7. The water quality of the effluent was similar to that of Example 1, except that the COD of the effluent began to rise sharply on the 19th day. In addition, the height of the water column required to maintain the permeate water load decreas...

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Abstract

The invention discloses a deep purifying method of difficult decomposing tail gas of living rubbish percolation liquid through cement based composite material, which comprises the following steps: blending silicate cement and analytical pure CaCO3 powder with weight rate at 2-3: 1; loading the mass into PVC column with pore on the bottom; sprinkling tail water of percolation liquid on the reacting layer intervally; controlling the percolation water load at 0.6-0.8mL.g<-1>.d<-1>; flowing tail water from the pore on the bottom of column after percolating the reacting layer; making the yielding water reach GB16889-1997 two-grade discharge standard within 20 d; regenerating reacting material for many times through sintering under 900 deg.c for 1h.

Description

technical field [0001] The invention relates to a deep purification treatment technology for tail water of leachate biological treatment of domestic garbage landfill, and belongs to the technical field of wastewater treatment. Background technique [0002] At present, landfill is still the main way to deal with municipal solid waste in my country, and more than 90% of the garbage removal volume is transported to landfill for disposal. There are nearly a thousand landfills in my country, with a daily output of 40,000 to 80,000 tons of leachate. The up-to-standard treatment of landfill leachate is the key to maintaining the safe and stable operation of the landfill. [0003] Landfill leachate has complex components and is extremely polluting, and has been included in the "blacklist" of my country's environmental priority pollutants. Considering the economy and practicability of the treatment process, the current treatment of leachate in my country mainly adopts a combination...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 赵由才宋玉郝广才黄仁华徐卫表邹庐泉楼紫阳牛冬杰柴晓利宋立岩
Owner SHANGHAI TONGJI CONSTR CO LTD
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