Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater

A humic filler, refractory technology, applied in anaerobic digestion treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of unsatisfactory nitrification and denitrification function, easy blockage, large floor space, etc. , to achieve the effect of simple structure, large saturated hydraulic permeability coefficient and saving floor space

Inactive Publication Date: 2013-07-24
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of easy clogging, unsatisfactory nitrification and denitrification function and large occupied area in the existing biological filter technology when denitrifying wastewater, the present invention provides a kind of anoxic humic filler filter and treatment of difficult nitrogen content. The met

Method used

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  • Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater
  • Anoxic humic filler filter tank and method for treating nitrogen containing degradation-resistant wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0036] equipment such as figure 1 As shown, a filter tank with anoxic humic fillers includes a tank body, a water inlet pipe 1, a water distribution chamber 3, a supporting layer 6, a filler layer 7, a filler dosing pipe 8 and a drain pipe 10, and also includes an air inlet pipe 2, Long handle filter head 4, water distribution orifice plate 5 and overflow weir 9, water distribution chamber 3 is located at the bottom of the pool body; water inlet pipe 1 and air intake pipe 2 are connected to water distribution chamber 3; The upper part is the water distribution hole plate 5, the supporting layer 6 and the packing layer 7; the long handle filter head 4 passes through the water distribution hole plate 5, one end is connected with the supporting layer 6, and the other end is inserted into the water distribution chamber 3; the supporting layer 6 It is composed of natural pebbles or gravel; the filler feeding pipe 8 is connected to the filler layer 7 on one side of the pool body; th...

Embodiment 2

[0044] Same as Example 1, the difference is that the thicknesses of the four layers of natural gravel in the support layer 6 are 30mm, 30mm, 40mm, and 100mm from top to bottom, and the total thickness is 200mm. The height of the water distribution chamber 3 is 500 mm; the height of the packing layer 7 is 1000 mm; the height of the top of the packing layer 7 from the overflow weir 9 is 700 mm. The number of filter heads arranged is 56 / m 2 . In step B), 160 kg of slurry-like fresh peat filler is added to the filler layer 7 each time. In step D), the feeding time of each compressed air is 5min.

[0045] Process conditions and parameters: The influent water in this example is pretreated tannery wastewater, which has been treated for chromium removal and desulfurization. COD in influent water quality Cr The total nitrogen is 1250mg / L, the total nitrogen is 472mg / L, and the ammonia nitrogen is 225mg / L. The ambient temperature is 25°C, and the influent filtration rate is 3m / d. ...

Embodiment 3

[0048] Same as Example 1, the difference is that the thicknesses of the four layers of natural gravel in the support layer 6 are 30mm, 30mm, 40mm, and 100mm from top to bottom, and the total thickness is 200mm. The height of the water distribution chamber 3 is 450 mm; the height of the packing layer 7 is 1700 mm; the height of the top of the packing layer 7 from the overflow weir 9 is 630 mm. The number of filter heads arranged is 60 / m 2 . In step B), 240 kg of slurry-like fresh peat filler is added to the filler layer 7 each time. The feeding time of each compressed air in step D) is 10min.

[0049] Process conditions and parameters: The influent water in this example is pretreated tannery wastewater, which has been treated for chromium removal and desulfurization. COD in influent water quality Cr The total nitrogen is 906mg / L, the total nitrogen is 367mg / L, and the ammonia nitrogen is 139mg / L. The ambient temperature is 25°C, and the influent filtration rate is 6m / d.

...

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Abstract

The invention discloses an anoxic humic filler filter tank and a method for treating nitrogen containing degradation-resistant wastewater, and belongs to the field of environmental protection. The anoxic humic filler filter tank comprises a tank body, a water inlet pipe, a water distributing room, a bearing layer, a filler layer, a filler casting pipe and a drainage pipe. The anoxic humic filler filter tank further comprises a gas inlet pipe, a long handle filter head, a water distributing pore plate and a downflow weir. The water inlet pipe and the gas inlet pipe are connected with the water distributing room. The water distributing pore plate, the bearing layer and the filler layer are sequentially arranged from bottom to top along the distributing room in the tank body. The long handle filter head passes through the water distributing pore plate. According to the invention, limited space is reasonably utilized, occupied area is saved to the maximum extent, and treated nitrogen containing organic wastewater can satisfy the emission standard of wastewater in industries. According to the method for treating nitrogen containing degradation-resistant wastewater in the anoxic humic filler filter tank, biological removal of nitrogen and adsorption of hardly degradable substances are organically combined by combining the anoxic humic filler filter tank and an active sludge process, so that the removal efficiency of total nitrogen and hardly degradable substances is improved.

Description

technical field [0001] The invention belongs to the field of environmental protection, and more specifically relates to an anoxic humic filler filter and a method for treating nitrogen-containing refractory waste water. Background technique [0002] Biological aerated filter is a new sewage treatment process that emerged in the early 1990s. The most widely used and mature processes are BIOFOR, BIOSTRY, TETRA DENITE and BIOPUR. Compared with the traditional ordinary biological filter, the biological aerated filter technology has the characteristics of high treatment efficiency, small footprint, low infrastructure cost, and strong impact load resistance. The field has good application prospects. The filter material of the biological aerated filter is an important factor affecting the growth, shedding and final treatment effect of microorganisms. The selection of the appropriate filter material plays a decisive role in the operation, maintenance and treatment effect of the bio...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F9/14
Inventor 吴军张旋陈振鹏潘丙才王娟丁亮胡静周文敏王秋实高雅杨智力
Owner NANJING UNIV
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