V-shape air-stripping technology for removing nitrogen and phosphorus of large and medium-sized sewage processing

A sewage treatment, denitrification and phosphorus removal technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problem of insufficient width ratio and high energy consumption of the system , the amount of chemicals and other problems, to achieve the effect of improving the treatment rate and denitrification efficiency, energy consumption and energy saving, and remarkable efficacy

CN103395950AActive Publication Date: 2013-11-20WUHAN PURGELON ENVIRONMENTAL ENG TECH
8 Cites 17 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-11-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a V-shape air-stripping technology for removing nitrogen and phosphorus of large and medium-sized sewage processing. The technology comprises following steps: introducing sewage, subjecting the sewage to go through a coarse screen to remove the slag, then adding water, lifting by a sewage pump, subjecting the sewage to a fine screen, transporting the sewage to a sand settling pool, transporting the sewage to a hydrolysis acidification pool, transporting the sewage to an integral processing pool of V-shape air stripping reflux and two-grade precipitation, transporting the sewage to a disinfecting pool and finally discharging the sewage if the quality of the sewage meets the standard. In the technology, the integral sewage processing pool of V-shape air stripping reflux and two-grade precipitation substitutes the biochemical reaction pool of A / A / O activated sludge process, the nitrated liquid internal reflux pump pool, the secondary precipitation pool, the sludge internal influx and external influx pump pool, the coagulation reaction pool and the inclined tube precipitation pool, and thus the high efficiency and compactness of removing nitrogen and phosphorus in sewage are achieved. Compared to the conventional processing technology, the V-shape air-stripping technology has the advantages of small occupied area, low investment, little drug consumption, little sludge discharge, low energy consumption, low cost, stable and controllable water quality, and convenient operation management.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a large and medium-sized sewage treatment process, in particular to a sewage treatment method which simultaneously utilizes the principle of air lift, anaerobic / anoxic / aerobic and two-stage sedimentation to realize high-efficiency denitrification and phosphorus removal and a compact design. Background technique

[0002] Conventional sewage treatment methods are mainly biochemical methods, namely activated sludge method and biofilm method. Among them, activated sludge method is the most widely used secondary biological treatment process in various countries in the world. The earlier activated sludge process was mainly to remove organic pollutants, and now it has fully entered the process stage of not only removing organic pollutants, but also removing nitrogen and phosphorus. The principles of activated sludge denitrification and phosphorus removal processes are basically similar, but there are many forms of expression. At prese...

Examples

Embodiment 1

[0060] In the following, the present invention will be further described by referring to the accompanying drawings and using the V-type gas stripping denitrification and dephosphorization process of the present invention for large and medium-sized sewage treatment in combination with a certain sewage treatment project in a national key river basin as an example.

[0061] Such as figure 1 with image 3 As shown, the large and medium-sized sewage treatment V-type gas stripping denitrification and dephosphorization process flow of the present invention is simple and smooth, and the denitrification and dephosphorization can be realized in the same pool, and the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" (GB18918-2002 ) Class A standard, and can run stably. The system has no scraper, no internal return pump, and no external return pump. The concentration of gravity external return sludge is high, and the external return ratio is about 20%. The mud is small in ...

Embodiment 2

[0099] A new urban district plans to build a new city sewage treatment plant for both industrial and domestic sewage. After water quality sampling analysis, it is considered that it is basically suitable to adopt a sewage treatment process that mainly uses biochemical treatment and supplemented by physical and chemical treatment. Emission Standard" (GB18918-2002) Class B standard, the V-type air stripping denitrification and phosphorus removal process of the present invention has achieved good results. The total planned sewage treatment capacity of the new district is 78,000 m 3 / d, divided into three phases of construction, the first phase will be built with 26,000 m 3 / d scale, that is, 2 blocks of 13,000 m 3 In addition to the main V-shaped air-lift integrated pool of / d, there are also an underground coarse grid and lifting pump room, an emergency pool for water quality accidents, a fine grid grit chamber, and a hydrolytic acidification tank , a contact disinfection pool...