CN2250352Y - Biological film purifying device - Google Patents

Abstract

A new type of biofilm water purifier is composed of water inlet pipe, water outlet collection pipe, pool body, etc. The main feature is that the composite filler in the pool body is composed of parent material and granular activated carbon layer bonded on its surface with adhesive. The matrix material can be commercially available stacked packing, or plates such as plastic, ceramics or metal, and can be designed and processed according to technological requirements. The purifier of the utility model has the characteristics of large specific surface area of the composite filler, well-developed pores on the surface of the filler, good adsorption capacity, fast film formation, strong impact load resistance, and good treatment effect on refractory and trace organic matter. And has a particularly good water purification effect. It is suitable for the treatment and purification of raw water or waste water.

Description

A New Type of Biofilm Purifier

A novel biofilm purifier relates to the manufacturing technology of biological treatment devices for water and waste water purification.

Biofilm is a widely used technology in the field of water and wastewater treatment. This technology uses microorganisms fixed on the surface of the carrier, also known as biofilm, to transform and separate harmful substances in water to make them harmless. The biofilm carrier materials used here are collectively referred to as fillers. Traditional biofilm purifiers often use gravel as filler. Gravel has the advantage of low price, but its weight is heavy, the structure requirements of the purifier are high, and the surface is smooth, which is not suitable for the attachment and growth of microorganisms. Due to its low density and rough surface, biological ceramsite is also used in biofilm purifiers. However, ceramsite has a small specific surface area and low effective biomass per unit volume, which still cannot meet the requirements of high-efficiency biofilm purifiers for fillers. As a result, a wide variety of plastic fillers are widely used as a new generation of biofilm carrier materials. The plastic filler is light in weight and can be made into an ideal shape and size, and has a large specific surface area, but its surface is smooth, which is not conducive to the attachment and growth of microorganisms. It is difficult for the biofilm purifier using this kind of filler to form a film at the start-up stage, and the start-up time When the hydraulic load increases, the biofilm is easily washed off.

Granular activated carbon (GAC) has a rough surface and a well-developed pore structure, which provides an ideal place for the growth of microorganisms, so granular activated carbon has become a commonly used biofilm carrier material. The biofilm purifier with GAC as filler has fast film formation and short start-up time. The biofilm recovers quickly after being washed by hydraulic force, and the system has strong adaptability to changes in hydraulic load. In addition, many years of theoretical research and production experience have confirmed that in the biofilm purifier with activated carbon as filler, there is a synergistic effect between the adsorption of activated carbon and the bioutilization of biofilm. This synergistic effect is manifested in the fact that the adsorption of activated carbon provides a longer contact time for refractory organic matter and biofilm; the enrichment effect of activated carbon improves the ability of biofilm to remove trace organic matter; the adsorption-desorption of activated carbon slows down the impact load of toxic substances Destruction of biofilm; bioregeneration of biofilm prolongs the working cycle of activated carbon. Therefore, although the price of GAC is significantly higher than that of non-adsorbent materials such as sand and gravel, it is still widely used. However, GAC also has its limitations as a biofilm carrier. The porosity of the activated carbon filter bed is low, the head loss of the filter layer is large, and it is easy to be blocked. Especially when the influent water quality is poor. Furthermore, GAC should not be used under aeration and oxygenation conditions, that is, GAC cannot be used as a filler in a biological contact oxidation reactor.

The purpose of the utility model is to design a biofilm purifier with fast film formation, small water head loss, resistance to hydraulic erosion and poison impact load, strong ability to remove trace organic matter, and can operate as a biological contact oxidation reactor.

In order to achieve the above object, the utility model is achieved through the following schemes. The purifier includes water inlet pipe, water outlet collection pipe, composite filler, composite filler bracket, aeration pipe, mud discharge, vent pipe and pool body. It is composed of a granular activated carbon layer on its surface. The parent material can be a commercially available stacked filler, or it can be designed and processed according to the process requirements. Regardless of the use of metal, ceramics or plastics, the composite filler has a rough surface and a developed surface pore structure due to a layer of granular activated carbon sticking to the surface, providing an ideal environment for the growth and reproduction of microorganisms. Raw water or waste water is purified through the adsorption and degradation of microorganisms fixed on the surface of the composite filler. The qualified clean water is discharged from the water outlet collection pipe, and the sludge and impurities are discharged from the sludge discharge and vent pipe.

The utility model has the advantages of:

1. The biofilm purifier composed of composite filler with activated carbon layer bonded on the surface, because of its rough surface and developed pores, quick microbial film formation, short start-up time, strong adaptability to hydraulic load changes, activated carbon adsorption and biological The synergistic effect of membrane oxidation makes the purifier have high removal efficiency for poisons and refractory or trace organic substances.

2. The composite filler of this utility model adopts the commercially available stacked filler or the material designed and processed according to the technical requirements as the parent material, which has a large specific surface area, small water head loss, is not easy to block the filler, and has a wide range of applications. It is suitable for showering, Submerge all kinds of biofilm purifiers such as storm type and rotary type.

3. The biofilm on the composite filler has a strong recovery ability and the buffering effect of the adsorption capacity of the filler, making the biological treatment process more suitable for occasions where poisons or hydraulic shock loads are prone to occur, and where operations are often interrupted.

Accompanying drawing is embodiment of the utility model

Fig. 1. is the structural representation of the utility model.

Figure 2-1 is an enlarged view of the structure of the composite filler

Figure 2-2 is a schematic diagram of the structure of the combined composite filler

Figure 2-3 is a schematic diagram of the structure of the stacked composite filler

The utility model will be further described in conjunction with the accompanying drawings.

The utility model is composed of water inlet pipe 6, water outlet collecting pipe 7, composite filler 8, composite filler support 9, aeration pipe 10, mud discharge and emptying pipe 11, and pool body 12. The upper part of the pool body 12 is provided with a water inlet pipe 6, the middle is provided with a composite filler 8 supported by a composite filler bracket 9, the lower part is provided with an outlet collection pipe 7 for collecting treated qualified water, the bottom is provided with a mud discharge and emptying pipe 11, and a composite filler bracket 9 An aeration pipe 10 is arranged between the outlet water collecting pipe 7 .

Coat a layer of adhesive 2, such as epoxy resin adhesive, on plastic, metal, ceramic and other plates or other matrix materials 1. Before the adhesive is cured, sprinkle activated carbon particles 3 on the surface, press it tightly, and wait for the glue to cure. , the parent material 1 with granular activated carbon layer 3 stuck on the surface is designed, processed and spliced into a combined composite filler 4 according to the process requirements; it can also be used for the production of the turntable of the turntable biofilter.

Commercially available stacked standard packing as the parent material 1, such as Pall rings, Raschig rings, etc., are coated with epoxy resin glue 2 to impregnate the surface of the ring, and before the glue is cured, put the packing ring into the cleaned and dried Stir in the granular activated carbon, and after the adhesive is cured, a stacked composite filler 8 whose surface is covered with granular activated carbon 3 is obtained. The surface granular activated carbon of the composite filler used in the utility model can be manufactured by using water treatment, especially waste granular activated carbon in water treatment, so that the cost can be reduced, and the use effect of the product is basically unchanged.

Claims (3)

1. A new type of biofilm purifier, including water inlet pipe (6), outlet water collection pipe (7), composite filler (8), composite filler bracket (9), aeration pipe (10), mud discharge, and venting The pipe (11) and the pool body (12) are characterized in that the composite filler (8) is composed of a parent material (1) and a granular activated carbon layer (3) bonded on its surface with an adhesive (2). 2. The purifier according to claim 1, characterized in that: said matrix material (1) can be a commercially available stacked packing, or can be designed and processed by itself according to technological requirements. 3. The purifier according to claim 1, characterized in that: the granular activated carbon (3) can use feed water to treat waste activated carbon after use.

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