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Reutilization system for safe irrigation of sewage

A resource-based and safe technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of weak concepts of resource utilization and failure to consider how to retain nutrients in sewage, etc. problems, achieve the effect of reducing the demand for dissolved oxygen, reducing energy consumption, and realizing recovery

Active Publication Date: 2014-05-28
SOUTHEAST UNIV
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Problems solved by technology

[0002] At present, the concept of resource utilization of domestic rural domestic sewage is weak, and most of the treatment technologies are aimed at removing various pollutants in sewage, without considering how to retain nutrients such as nitrogen and phosphorus in sewage

Method used

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  • Reutilization system for safe irrigation of sewage
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Embodiment Construction

[0017] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0018] The combined filler used in the system of the present invention is a filler with a specification of Ф150mm×80mm. The central rope of the combined filler is a plastic rope, surrounded by aldehyde fibers or polyester filaments, which are evenly pressed on the double-circle large plastic ring. The length of the combined filler bundle is 0.4 m, the number of filler bundles is 8, and the filler bundles are evenly suspended in the combined filler area; the filler in the filler area is ceramsite with a particle size of 3-6mm.

[0019] Such as Figure 1~2 As shown, the resource utilization system for safe sewage irrigation of the present invention includes an anaerobic tank 1 and an aerobic biological filter tank 2, and also includes a connecting pipe 3, and the anaerobic tank 1 is successively divided into a water inlet area 4 and a combined packin...

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Abstract

The invention discloses a reutilization system for safe irrigation of sewage. The reutilization system comprises an anaerobic tank and a short range aerobic biological filter, and further comprises a connecting pipe, wherein the anaerobic tank is sequentially divided into a water inlet zone, a composite filling material zone and a sedimentation zone; the short range aerobic biological filter is sequentially provided with a filling material zone, a supporting zone, and a water outlet zone; the sedimentation zone of the anaerobic tank is communicated with the filling material zone of the aerobic biological filter through the connecting pipe. The reutilization system provided by the invention aims to keep nitrogen and phosphorus quantity in the sewage and achieve mineralization, increases reutilization value of the sewage, reduces the organic matter concentration in the water to lower than 50 mg / L under the condition of low energy consumption, increases safety of sewage irrigation, avoids the problems of crop rotten root and soil hardening which are easily caused by the conventional sewage irrigation, and shortens the process of the biological filter and realizes the energy saving and consumption reduction by adopting the characteristic that ammonia nitrogen can be easily absorbed by crops.

Description

technical field [0001] The invention relates to a sewage resource utilization system for rural domestic sewage for safe irrigation, and belongs to the technical field of water treatment and sewage resource utilization. Background technique [0002] At present, the concept of resource utilization of domestic rural domestic sewage is weak, and most of the treatment technologies are aimed at removing various pollutants in sewage, without considering how to retain nutrients such as nitrogen and phosphorus in sewage. In the traditional A / O treatment system for the purpose of carbon removal, nitrogen removal and phosphorus removal, the residence time of the anaerobic tank is 14h, the volume load of the aerobic biological filter is 0.50kgCOD / (m3·d), and the hydraulic load is 4.0 m3 / ( m2·d), the effluent meets the national "Urban Sewage Treatment Plant Pollutant Discharge Standard" (GB18918-2002) Grade A standard, the concentration of ammonia nitrogen should be less than 5mg / L, the...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 吴磊洪月菊李先宁林海梅
Owner SOUTHEAST UNIV
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