Unlock instant, AI-driven research and patent intelligence for your innovation.

Improved design method of horizontal subsurface flow wetland for coping with substrate clogging

A technology of horizontal submerged flow and design method, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem that the effect is very different, the low-cost process cannot solve the problem, the symptoms are not cured, etc. problems, to achieve the effect of easy overall replacement

Active Publication Date: 2012-08-22
WENZHOU MEDICAL UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the results of this study also raised questions. The effective depth of horizontal subsurface flow wetlands is generally designed to be 60-80 cm, which means that if the substrate needs to be replaced to solve the clogging problem, the plant growth substrate layer with the strongest microbial activity and the most developed plant root system will be replaced. In this way, wetland plants and substrate microorganisms will take a long time (generally considered to be at least one year) to re-mature after the wetland substrate is replaced to recover the processing capacity.
[0012] Looking at the research status at home and abroad, there are many factors that cause the matrix clogging of constructed wetlands, and there are many corresponding preventive measures and restoration countermeasures, but the effects vary greatly, and often treat the symptoms rather than the root cause
In general, organic pollutants and their metabolites are the main reasons for the clogging of constructed wetlands. Solid particles such as inorganic suspended matter and organic solids in influent water can be treated by low-cost pretreatment methods (such as grids, sedimentation tanks, flocculation, etc.) etc.) can be well solved, but the microbial metabolites (including bacterial extracellular polymers, etc.) It will become the focus of the research on sewage treatment technology of constructed wetlands

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improved design method of horizontal subsurface flow wetland for coping with substrate clogging
  • Improved design method of horizontal subsurface flow wetland for coping with substrate clogging
  • Improved design method of horizontal subsurface flow wetland for coping with substrate clogging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Depend on Figure 1a , Figure 3a or Figure 3b , Figure 4 As shown, the process flow is Figure 1a As shown, at this time, a new type of fiber filler unit is installed behind the gravel water distribution area of ​​the horizontal subsurface flow wetland, and its length a is preferably 1 / 10 to 1 / 4 of the total length l of the horizontal subsurface flow wetland. It only needs to be separated from the back-end conventional traditional matrix filler 4 (such as gravel, slag, ceramsite, zeolite, etc.). The sewage flows backward in the horizontal direction in the wetland, and flows through the crushed stone water distribution area 1, the new fiber packing unit, and the traditional matrix section in sequence to complete the sewage purification. During the purification process, pollutants and metabolites are most likely to accumulate in the first 1 / 10 to 1 / 4 of the total length l, that is, the new fiber packing unit, and the new fiber packing unit can be removed after runn...

Embodiment 2

[0036] Depend on Figure 1b , Figure 3a or Figure 3b As shown, the process flow is Figure 1b As shown, at this time, a new type of fiber packing unit is installed behind the gravel water distribution area of ​​the horizontal subsurface flow wetland, and a fiber packing unit of the same size is also installed in front of the catchment area. Since the system is covered by permeable flower wall 3( Figure 1b The winning number 3) is divided into 3 series pools. It is suggested that after the system has been in operation for 3 to 4 months, the fiber packing unit I 2 ( Figure 1b The middle mark 2) may accumulate more organic matter (at the inlet end of the system) and cause blockage and lower removal efficiency, while the fiber packing unit II 7 in the outlet pool at the rear end ( Figure 1b The middle mark 7) is located at the end of the system. There is also a crushed stone catchment area 5 near the fiber packing unit II 7. The influent load is relatively low and most of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an improved design method of a horizontal subsurface flow wetland for coping with substrate clogging. In the improved design method, substrate in a horizontal subsurface flow wetland substrate bed body, adjacent to a position of 1 / 10-1 / 4 the total length of a water inlet end substrate bed body, is constructed by using modularized anti-clogging stuffing; and sewage to be treated is introduced into the wetland by using the novel stuffing unit as the wetland water inlet end substrate bed body so as to purify the sewage by means of a series of physical, chemical and biological functions. The novel modularized stuffing has the characteristics of high porosity and convenience for change, therefore, a treatment system can solve the problem of substrate clogging without stopping operation for a long time and establishing a parallel unit, the engineering investment is saved, the management is simple, the operation and maintenance cost is low, and the treatment effect is stable; and the method can be applied to treatment of urban sewage and repair of polluted water body.

Description

【Technical field】 [0001] The invention relates to the technical field of environmental protection, in particular to an improved design method of a horizontal subsurface flow wetland to deal with matrix clogging. 【Background technique】 [0002] Constructed wetlands are composed of artificial substrates (gravel, gravel, etc.) and aquatic plants growing on them. Sewage flows on the surface or under the surface of the wetland substrate, and is degraded by a series of processes such as substrate adsorption, plant absorption, and microbial transformation. It is a unique substrate-plant-microbe system different from natural wetlands. However, due to the design idea of ​​horizontal subsurface flow constructed wetlands, subsurface flow wetlands are extremely prone to clogging; according to a survey conducted by the US Environmental Protection Agency on more than 100 constructed wetlands in operation, nearly half of the facilities have substrate within 5 years The clogging problem is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/10
CPCY02W10/10
Inventor 邓欢欢葛利云张明华王学东胥檀张亚雷周雪飞徐铮
Owner WENZHOU MEDICAL UNIV