Multi-stage serial modular domestic wastewater treatment system and domestic wastewater treatment method

A technology for domestic sewage and treatment systems, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve the problems of high operation and maintenance costs, complex technological processes, and low treatment efficiency. , to achieve the effect of convenient construction, low cost and improving the effect of sewage treatment

Inactive Publication Date: 2014-12-03
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the technical problems of low treatment efficiency, complex process flow, high

Method used

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  • Multi-stage serial modular domestic wastewater treatment system and domestic wastewater treatment method
  • Multi-stage serial modular domestic wastewater treatment system and domestic wastewater treatment method
  • Multi-stage serial modular domestic wastewater treatment system and domestic wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: A multi-stage serial modularized domestic sewage treatment system, including grid tank 1, sedimentation tank 2, anaerobic tank, aerobic filter tank 5, horizontal subsurface flow constructed wetland 6, and vertical subsurface flow constructed wetland 7 in series in sequence And effluent pool 8, grid pool 1 is provided with sewage water inlet, and effluent pool 8 is provided with clean water outlet; In grid pool 1, be provided with grid 9 and grease trap 10; At the top of anaerobic pool, be provided with The self-regulating biogas anaerobic fermentation cover 12 is hung with three-dimensional elastic packing 11 in the anaerobic tank; There is a filter screen 13; the bottom of the vertical subsurface flow constructed wetland 7 is provided with a water distribution pipe network connected to the water outlet of the horizontal subsurface flow constructed wetland 6.

[0033] In the grid pool 1, the grid spacing is 2.5mm, which is used to intercept and remove larg...

Embodiment 2

[0037] Embodiment 2: The difference from Example 1 is that, by weight percentage, the red loam layer contains 3-12% of modified attapulgite, and the preparation method of this modified attapulgite is as follows:

[0038] (1) Pretreatment: Grind attapulgite and pass through a 20-100 mesh sieve, then calcinate at 200°C for 3-5 hours, soak in deionized water for 20-30 hours, wash several times until the washing water is clarified, and then dry it for later use ;

[0039] (2) Activation modification: Slowly dissolve a certain amount of chitosan with HAc solution with a volume fraction of 2-4%. A certain amount of the chitosan colloidal solution is mixed and stirred into a paste, and the amount of the chitosan colloidal solution is used so that the attapulgite is fully infiltrated, and then the obtained paste is dried at 105° C. to complete.

Embodiment 3

[0040] Embodiment 3: A multi-stage serial modularized domestic sewage treatment system. The difference from Embodiment 1 is that the anaerobic tank is a first-level anaerobic tank 3 and a second-level anaerobic tank 4 connected in series. The filler 11 is provided with polyvinyl alcohol-sodium alginate gel balls and porous spherical suspension fillers. The preparation method of the polyvinyl alcohol-sodium alginate gel ball is as follows: polyvinyl alcohol and sodium alginate with a mass ratio of 9:1 are prepared by a solution blending method.

[0041] Using two-stage anaerobic tanks in series to treat sewage can effectively improve the anaerobic digestion of organic matter. Polyvinyl alcohol-sodium alginate gel balls and porous spherical suspension fillers are added on the three-dimensional elastic filler. Polyvinyl alcohol (PVA)-sodium alginate (SA) gel balls are prepared by solution blending method, and the mixing ratio is: m(PVA):m(SA)=9:1. The diameter of the polyvinyl ...

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Abstract

The invention discloses a multi-stage serial modular domestic wastewater treatment system and a domestic wastewater treatment method, for solving the technical problem that the conventional rural domestic wastewater treatment facility is low in treatment efficiency, complex in process flow, high in operating and maintenance costs and high in management difficulty. The multi-stage serial modular domestic wastewater treatment system comprises a grating pond, a settling pond, an anaerobic pond, a facultative filter tank, a horizontal undercurrent artificial wetland, a vertical undercurrent artificial wetland and an effluent pond which are sequentially connected in series, wherein the grating pond is provided with a wastewater inlet, and the effluent pond is provided with a clean water outlet. A combined process of the multi-stage serial modular domestic wastewater treatment structure is designed and constructed, so that the wastewater treatment effect is further improved. The system and method are low in cost and convenient to construct, particularly suitable for rural areas with low population density. Compared with the conventional wastewater treatment facilities, the system and method are more economical and practical.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a multi-stage series series modular domestic sewage treatment system and a domestic sewage treatment method. Background technique [0002] In 2013, my country's sewage discharge reached 75 billion m 3 , of which, the discharge of rural domestic sewage is 27 billion m 3 . At present, the rural domestic sewage treatment mode is mainly centralized treatment. To adopt this treatment method, a large number of sewage pipe network collection systems and sewage treatment stations (plants) need to be established to collect, transport and treat sewage uniformly, and the investment is relatively large. The problems existing in the existing rural domestic sewage treatment methods are as follows: first, the vast rural areas of our country have weak funds and are unable to build domestic sewage pipe network collection systems and centralized treatment facilities; second, the rural p...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 周振民周科王学超
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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