The Introduction of Juntai BIO-BLOCK Filter Media
Written by: Jasmine Yu
Contact email: jasmine@juntaiplastic.com
A biological wastewater treatment plant in which Juntai BIO-BLOCK filter media has been installed has this unique flexibility.
If necessary. the ability to increase its capacity to handle flow variations and load changes, which inevitably occur in the inlet of all wastewater treatment plants.
Table 2: Specific biologically active surface area for Juntai BIO-BLOCK filter media
General requirements for biological filter media in order to achieve optimal treatment results.
1. The fiter media should have a relatively rouah surface in order to enhance rapid establishment of a bioaicaly active surface (bio-film).
2. The filter media must have a structure that makes back wash and cleaning operations on site possible.Canals have to be vertical and through the entire media column.
3. The filter media must have a structure that ensures optimal oxygen transfer to the bio-film i.e. it must have suf-ficiently high porosity.
4. The filter media must never clog and it must have self-cleaning properties. The structure must allow shed bio film fragments to pass unhindered throughout the filter.
5. The filter media modules should be constructed with circular or oval threads. Bacterial growth on a circular or oval surface increases the diameter, thus increasing the specific bioloqically active surface area.(Please note! This is in opposition to media with eve surfaces on which the specific bioloaicaly active surface area is con stant).
6. The filter media has to be biologically and chemically non-degradable.
7. The filter media must be self-supporting and mechanically strong. It must be able to carry overlying material and personnel should be able to walk freely and perform service tasks without deformation of the media.
8. The filter media must be UV stable and it must tolerate potential variations in temperature.
9. The filter media should be made from an environmentally compatible material(i.e.no PVC compounds or glue).
10. The filter media must be modular and easy to handle. this will ease installation and potential temporary removal in order to perform service tasks below the filter
11. The filter media must be easy to fit into any type of tank or bio-reactor without any waste of space and material.
Activated Sludge Systems vs.Fixed Film Technology
Activated sludge systems came into use around 1920 as a new and effective process for wastewater treatment The principle is based on the formation of flocs of micro-organisms that circulate freely in the water column due to the iniection of larae volumes of air. The focs have a close to optimal contact surface towards the wastewater and excellent treatment results can be achieved when using this technology.
The operation of activated sludae systems is. however potentially unstable. as the process reauires a stable and homogeneous supply of process water in order to work optimal. Since the supply of wastewater (both quantity and aualitv) from the industry and urban communities varies tremendously. the inlet conditions of wastewater to actiy-ated sludge plants is controlled by implementing expensive and complicated monitoring systems. Volumes of wastewater larger than normal are often by passed without treatment, which clearly is unacceptable from an environmental point of view.
The capacity of activated sludge plants can easily be improved by upgrading the plant to a combination with submerged aerated filters or trickling filters based on fixed film technology with Juntai BIO-BLOCK. The risk of flushing out active bacteria is also minimised as a large part of these bacteria is fixed onto the filter media. The larger number of active bacteria in the same tank volume will increase treatment capacities significantly Improvements by up to400% have been achieved using the same tank volume as before.