Biofilter suitable for sewage treatment of water-network type village ditches

A biological filter and filter technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as easy breeding of mosquitoes and flies, complex operation and management, and achieve structural Simple, low investment and convenient management

Active Publication Date: 2015-04-01
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing biological filter technology, such as complicated operation and management, easy breeding of mosquitoes and flies, etc., to provide a biological filter suitable for water network type village and town ditches sewage treatment, which can utilize natural The topographical conditions can efficiently treat pollutants, the structure is simple, the filter material is not easy to clog and easy to replace, no energy consumption, low investment, and no management is required, providing technical support for demonstration projects

Method used

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  • Biofilter suitable for sewage treatment of water-network type village ditches
  • Biofilter suitable for sewage treatment of water-network type village ditches
  • Biofilter suitable for sewage treatment of water-network type village ditches

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1, the development of filter material

[0045] 1. Preparation steps of filter material

[0046] 1) Dry and crush the fly ash, clay and coal powder of the power plant, pass through a 200-mesh standard sieve, mix them evenly according to the ratio of 7:2:1, add water to plasticize them into balls, and place them in an oven at 180°C for 3 hours. After cooling, place it in a muffle furnace for temperature programming, control the preheating temperature to 500°C, preheating time for 25 minutes, and then raise the temperature to 1050°C for sintering for 20 minutes to complete the entire preparation process. After cooling, take it out to get a particle size of 5-8mm, a moisture content of 22.5%, and a bulk density of 788kg / m 3 , the true density is 1.82g / m 3 , cylinder compressive strength is 5.2MPa, specific surface area is 5.28m 2 / g water treatment ceramsite filter material.

[0047] 2) Use the above ceramsite filter material with 1mol / L FeCl 3 The solution ...

Embodiment 2

[0054] Embodiment 2, biofilter design and operation

[0055] The setting of the water inlet of the biological filter is to make full use of the terrain of the water network and the gravity of the water. The sewage naturally falls from the dam to the front of the filter through the water inlet pipe. During the falling process, the sewage carries a large amount of oxygen in the air, making the filter An aerobic zone is formed at the front end and the upper end to provide an environment suitable for the survival and growth of aerobic microorganisms; since the water level of the upstream pond and ditch changes with the seasons, the inlet pipe of the filter is designed to be two upper and lower pipes to adapt to this reality. Then the sewage flows along the length of the pool through the baffle plate, passing through each cell, and the cell is filled with a self-made filter material with the function of synchronous denitrification and phosphorus removal. Microorganisms growing on t...

Embodiment 3

[0059] Embodiment 3, the reuse of ceramsite filter material after sewage treatment

[0060] When the adsorption of the filter material reaches saturation, the filter material in the filter material basket can be taken out for reuse. In the process of sewage treatment, the filter material adsorbs nutrients such as organic matter, nitrogen and phosphorus, and the K contained in its main component fly ash 2 O,Na 2 O, MgO, CaO, Fe 2 o 3 ,Al 2 o 3 , SiO 2 And phosphorus, copper, zinc, manganese and other rich minerals and trace elements are indispensable elements in the process of plant growth. It can be mixed with soil according to a certain mass fraction, and used as an organic fertilizer for non-edible plants such as flowers, grasslands, gardens, etc., to achieve the purpose of resource utilization. Because of concerns that the use of saturated fly ash filter material as fertilizer will cause soil compaction and excessive heavy metals, a heavy metal dissolution test was c...

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Abstract

The invention belongs to the technical field of sewage treatment and relates to a biofilter suitable for sewage treatment of water-network type village ditches. The biofilter is divided into ten cells along the length direction thereof by a baffle plate, coarse gravel is placed at the bottom layer of each cell, two layers are arranged on the coarse gravel, five filter material baskets are horizontally placed at each layer, the filter material baskets are filled with home-made nitrogen/phosphorus removal filter material, and plants are planted in the upper-layer filter material basket; the home-made ceramisite filter material is searched and developed through two steps (firing and modification); after the filter material reaches absorption saturation degree, the filter material can be taken out of the filter material baskets; and because of adsorbing nutrient elements such as nitrogen and phosphorus, the filter material is enhanced in fertility, can be agriculturally used as fertilizer or a soil conditioner for non-edible plant, thus achieving the purpose of resource utilization. The biofilter is simple in structure and low in investment, artificial aeration and filter material backwash are not carried out, oxygen is only charged in a natural manner, thus realizing the purposes of no power, no energy consumption and convenient management, and the biofilter is a novel process suitable for sewage treatment of water-network type village ditches in China.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a biological filter suitable for water network type village and town ditches sewage treatment. Background technique [0002] In the past 20 years, although my country's sewage treatment plants have been continuously built and the sewage treatment rate has been continuously improved, they are mainly concentrated in cities. Most of the rural sewage in the country has not been treated, and the proportion of rural sewage discharge in the total sewage discharge is increasing. bigger and bigger. Because a large amount of production and domestic waste water is discharged into various water bodies without treatment, and public facilities cannot keep up with the needs of development, a large number of rural people drink unsanitary water. According to relevant surveys, the drinking water sources of 700 million people in my country are unqualified, and the rate of E. co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 邵青黄种买王红萍周靖淳
Owner WUHAN UNIV
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