Artificial oxygenation type composite underflow wet land sewage purification process

A technology of artificial wetland and vertical flow wetland, which is applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Thoroughly wait for the question

Inactive Publication Date: 2008-12-31
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

[0003] How can we improve the treatment capacity and purification effect of the wetland system, and prolong its service life? Many researchers have found that the low oxygen utilization rate is the main reason for the low purification efficiency of constructed wetlands. Under anoxic conditions, organisms cannot perform normal aerobic respiration, and the concentration of certain elements and organic substances in the reduced state can re

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  • Artificial oxygenation type composite underflow wet land sewage purification process
  • Artificial oxygenation type composite underflow wet land sewage purification process
  • Artificial oxygenation type composite underflow wet land sewage purification process

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Embodiment Construction

[0010] according to figure 1 As shown in the process flow, the influent water first passes through the grille (Fig. 1) to intercept and remove floating garbage and sundries, then enters the biologically enhanced sedimentation tank (Fig. 2), passes through the filter screen (Fig. 8) and floating plants (Fig. 7) Most of the suspended particles have been effectively removed, and then collected into the water distribution ditch (Fig. 14) of the micro-aeration vertical flow wetland through the outlet weir (Fig. 6), and evenly distributed by the water distribution pipe at the bottom of the wetland. It flows into the wetland from bottom to top, and at the same time, the high-pressure blower aerates and oxygenates the wetland system through the aeration pipe (Fig. 12) arranged in the water inlet pipe to improve the oxidation decomposition and nitrification effect of organic matter, and the micro-aeration vertically flows the wetland water through the weir After collection, it enters t...

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Abstract

The invention relates to an artificial oxygen increasing type combined subsurface flow wetland sewage purification technique, belonging to the field of water pollution control; aiming at the defects of artificial wetlands such as easy blockage, low purification capability and large seasonal fluctuation, a sewage purification technique which includes a biological strengthening sedimentation tank, a micro aeration vertical flow wetland and a subsurface horizontal-flow wetland is developed. The biological strengthening sedimentation tank can reduce the concentration of suspended substances, and the micro aeration vertical flow wetland can improve oxidative decomposition and nitrification effect of organic matter, can reduce the organic residue in a wetland system to the maximum extent and prolong the service life of the wetland. The subsurface horizontal-flow wetland can create an anoxia-anaerobic environment for the effluent of the micro aeration vertical flow; therefore, denitrification can be carried out more completely. The technique is applicable to the treatment of the domestic sewage from villages, small towns and scenic spots and the sewage entering lakes and rivers which is mixed with urban domestic sewage, and the deep purification of the tail water of sewage treatment plants.

Description

(1) Technical field [0001] This technology belongs to the field of water pollution control, and can be applied to the treatment of domestic sewage in villages, towns and tourist attractions, as well as the sewage treatment of rivers entering lakes mixed with urban domestic sewage, and the deep purification of tail water from sewage treatment plants. (2) Background technology [0002] Constructed wetlands, as a technology for water pollution control, have been widely used and developed around the world since they originated in Europe in the 1960s. A water pollution control process that combines wetlands and surface flow wetlands as the main body and combines multiple layout methods. But like other purification processes, the advantages of constructed wetland technology are obvious, but the disadvantages are also prominent. While everyone is attracted by its advantages such as low investment and operation costs, good ecological security, and strong scale applicability, its sh...

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Application Information

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IPC IPC(8): C02F3/00C02F3/12C02F3/32
CPCY02W10/10
Inventor 潘继征李文朝柯凡冯慕华
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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