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A Tidal Flow Constructed Wetland Substrate Filler for Advanced Treatment of Rural Domestic Sewage

A domestic sewage and advanced treatment technology, applied in sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. The effect of low technical requirements, stable operation and large specific surface area

Active Publication Date: 2017-10-31
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different types of constructed wetlands have obvious differences in the oxygen environment of the bed and the removal effect of pollutants due to their different structures and operating modes.

Method used

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  • A Tidal Flow Constructed Wetland Substrate Filler for Advanced Treatment of Rural Domestic Sewage
  • A Tidal Flow Constructed Wetland Substrate Filler for Advanced Treatment of Rural Domestic Sewage
  • A Tidal Flow Constructed Wetland Substrate Filler for Advanced Treatment of Rural Domestic Sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 The tested water body is domestic sewage from a certain campus.

[0020] The test device is a simulated cylindrical tidal flow constructed wetland system. The cylinder is made of plexiglass, 130 cm high and 20 cm in inner diameter. Lay 10 cm to 15 cm high gravel, crushed stone and broken brick cushion (containing a small amount of coarse sand) at the bottom of the column. The particle size of gravel, crushed stone and broken brick is 15 to 40 mm; , from top to bottom are equal-volume vermiculite and zeolite mixtures with a height of 45-50 cm, and equal-volume limestone, coal ash, zeolite with a height of 35-40 cm, mixed with an appropriate amount of organic carbon source heated by alkali Material (alkali-heated organic carbon source preparation method: 200 g corn stalks, washed with water to remove dust, shredded, dried at 105°C for 1.5 hours, added NaOH with a mass percentage of 1%, heated at 85°C for 0.9 hours, measured by mass In terms of parts, organic ca...

Embodiment 2

[0025] Example 2 The tested water body is rural domestic sewage treated by septic tanks.

[0026] The test device is a simulated cylindrical tidal flow constructed wetland system. The cylinder is made of plexiglass, 130 cm high and 20 cm in inner diameter. The bottom of the column is paved with 10 cm to 15 cm high gravel and broken brick cushion (containing a small amount of coarse sand). The particle size of gravel and broken bricks is 15 to 40 mm; 35-40 cm equal-volume vermiculite and zeolite mixture, 40-45 cm-high equal-volume limestone, coal ash, zeolite and an appropriate amount of alkali-heated organic carbon source mixture (alkali-heated organic carbon source Mixture preparation method: 150g of straw, washed with water to remove dust, shredded, dried at 105°C for 1.5 hours, added NaOH with a mass percentage of 1%, heated at 85°C for 0.9 hours, in parts by mass, organic carbon source and lye The solid-liquid ratio is 1:25), the particle size is 3-20 mm; the upper layer ...

Embodiment 3

[0031] Example 3 The tested water body is livestock and poultry wastewater after pretreatment and anaerobic digestion in a farm.

[0032]The test device is a simulated cylindrical tidal flow constructed wetland system. The cylinder is made of plexiglass, 130 cm high and 20 cm in inner diameter. A 10 cm to 15 cm high gravel cushion (containing a small amount of coarse sand) is laid on the bottom of the column, and the gravel particle size is 15 to 40 mm; Equal volume of vermiculite and zeolite mixture, equal volume of limestone, coal ash, zeolite and appropriate amount of alkali-heated organic carbon source mixture with a height of 35-40 cm (the preparation method of alkali-heated organic carbon source: reed 200g, Washing and dedusting, drying at 105 °C for 1.5 hours, shredding, adding 1% NaOH by mass, heating at 85 °C for 0.9 hours, in parts by mass, organic carbon source and lye (solid-to-liquid ratio: 1:25), granules The diameter is 3-20 mm; the upper layer is covered with ...

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Abstract

The invention belongs to the technical field of agricultural domestic sewage treatment and particularly relates to tide current constructed wetland substrate packing for deep treatment of rural domestic sewage. The tide current constructed wetland substrate packing comprises three layers of substrate structures, wherein universal type substrates are adopted in the upper layer structure and the lower layer structure, and a nitrogen preference type substrate and a phosphor preference type substrate are adopted in the middle layer structure. The universal type substrates comprise coarse sand and gravel. The nitrogen preference type substrate comprises zeolite and an organic carbon source obtained through alkali heating. The phosphor preference type substrate comprises vermiculite, limestone and coal ash residues. The height of the upper layer structure ranges from 10 cm to 20 cm. The height of the middle layer structure ranges from 40 cm to 100 cm, and the mixed material of vermiculite and zeolite which are equal in size and the mixed material of limestone, coal ash residues, zeolite and the organic carbon source obtained through alkali heating which are equal in size are arranged from top to bottom in sequence, wherein the height of the mixed material of vermiculite and zeolite ranges from 20 cm to 55 cm, and the height of the mixed material of limestone, coal ash residues, zeolite and the organic carbon source obtained through alkali heating ranges from 20 cm to 45 cm. The height of the lower layer structure ranges from 10 cm to 20 cm. The tide current constructed wetland substrate packing is capable of treating various pollutants in the sewage at the same time, stable in operation, not likely to cause blockage, economical and efficient.

Description

technical field [0001] The invention belongs to the technical field of agricultural domestic sewage treatment, in particular to a tidal flow artificial wetland matrix filler for advanced treatment of rural domestic sewage. Background technique [0002] In my country's economically underdeveloped rural areas, due to the lack of sewage collection pipe networks and corresponding treatment facilities, most domestic sewage is directly discharged into receiving water bodies without any treatment. In some river basins, especially drinking water source protection areas, the discharge of domestic sewage has become the main source of pollution. Therefore, it is very urgent to deal with these dispersed domestic sewage. The characteristics of rural domestic sewage are: the seasonality of sewage is relatively strong, the water volume fluctuates greatly, the organic load and hydraulic load also change greatly, the content of nutrients is high, the biodegradability is good, and the sewage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 陈佳勃李法云范志平王艳杰王冬智
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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