Differences between the fillers of aerobic tank and anaerobic tank

The specific differences between the fillers of aerobic tank and anaerobic tank are mainly reflected in the materials, structures and shapes, functions and applications.

1. Material differences

Aerobic tank fillers:

Common materials include activated carbon, silica gel, ceramsite, etc. These materials have good adsorption properties and chemical stability, and can effectively adsorb and decompose pollutants in wastewater. For example, some aerobic tank may use PP porous suspended ball fillers, which are made of polypropylene (PP) materials and have the characteristics of light weight, corrosion resistance, and easy biofilm.

In addition, aerobic tank may also use combined porous ring fillers, biological biofilm polyurethane fillers, etc. These fillers not only provide space for microbial growth, but also promote full contact between oxygen and microorganisms.

MBBR Bio Filter Media: This is a prime example of a filler used in aerobic tanks. The media's porous structure provides a vast surface area for biofilm formation, where aerobic bacteria thrive. The biofilm effectively removes organic matter and nutrients from wastewater.

Tube Settler Clarifier: While not a direct filler, tube settlers are often used in conjunction with aerobic tanks to enhance solid-liquid separation. The tubes provide a surface for particles to settle, improving the efficiency of the overall treatment process.

Anaerobic tank fillers:

Mainly degradable organic matter, such as filler particles, humus, sand, etc. These materials provide growth matrix and attachment surface for anaerobic microorganisms, which is conducive to the growth and metabolism of microorganisms. For example, anaerobic tank may use elastic fillers, which are made of high molecular polymers, have flexibility and moderate rigidity, and can form a three-dimensional uniform radiation state arrangement to promote the attachment and growth of microorganisms.

In addition, anaerobic tanks may also use three-dimensional elastic fillers, mesh fillers, etc. These fillers have complex structures and large surface areas, which are conducive to the attachment of microorganisms and the accumulation of metabolites.

2. Differences in structure and shape

Aerobic tank fillers:

Usually present spherical or cubic shapes, such as PP porous suspension balls, porous ring fillers, etc. These fillers have good air permeability and dispersibility, which facilitates the full contact and reaction of oxygen and microorganisms.

Structurally, aerobic tank fillers may contain multiple pores and channels to increase the contact area between oxygen and wastewater and improve treatment efficiency.

Anaerobic tank fillers:

Mostly use structures such as triangles and diamonds with pores, such as elastic fillers and mesh fillers. These structures can increase the surface area of ​​the fillers, provide more attachment space for anaerobic microorganisms, and are also conducive to the accumulation and discharge of microbial metabolites.

Anaerobic tank fillers may also have special internal structures, such as spirals and meshes, to promote the three-dimensional flow of wastewater and the uniform distribution of microorganisms.

Bio Block Filter Media: This media is designed to promote anaerobic digestion. Its unique structure creates a complex environment that favors the growth of anaerobic bacteria, which break down organic matter and produce biogas.

MB Membrane Bio-Reactor: This technology combines biological treatment with membrane filtration. While the membranes themselves are not fillers, they play a crucial role in separating solids and pathogens from the treated water.

Disc Bubble Diffuser, Bubble Tube Diffuser, Spiral Mixing Aerator: These products are used to introduce oxygen into the anaerobic tank, creating a facultative zone where both aerobic and anaerobic processes can occur. This controlled oxygenation can enhance treatment efficiency.

3. Differences in functions and applications

Aerobic tank fillers:

The main function is to allow activated sludge to undergo aerobic respiration, further decompose organic matter into inorganic matter, and remove pollutants from wastewater. The selection and application of aerobic tank fillers need to consider factors such as easy attachment of biofilm and high oxygen utilization rate.

In application, aerobic tank fillers can significantly improve wastewater treatment efficiency, reduce energy consumption and operating costs.

Anaerobic tank fillers:

The main function is to perform reduction reactions, denitrification, dephosphorization and other treatments under anoxic or anaerobic conditions. The selection and application of anaerobic tank fillers need to consider factors such as the growth matrix, adhesion, and resistance to high-load impact of microorganisms.

The application of anaerobic tank fillers can effectively reduce the organic content and nutrient concentrations such as nitrogen and phosphorus in wastewater, and improve the effluent quality.