In the world, water resource has become less and less. Meanwhile, because the natural terrain of the earth can not make water effectively collected, water saving, a serious issue also faced in the world, has been one of the constantly-promoted policies in every country. Therefore, guiding industries to effectively use water is an imperative task. Through water treatment, wastewater can be collected and purified. If the quality of the reclaimed water meets the associated standards, then it can be recycled and reused. Consequently the goal of water saving can be achieved.
Filtering is mandatory for reclaiming water. Molykem has introduced foreign patent technology to build fiber filtering equipments which can filter and reclaim water. This advanced filtering equipment can completely substitute sand filters which have disadvantages such as lack of sand source and un-disposable waste. With the merits that conventional sand filters do not have, fiber filters are the necessary and efficient equipments for the filtration of industrial and household-used water. The distinguishing features are shown as the followings:
|Excellent filtration efficiency
|High Filtration Accuracy
|High filtration capacity
|Small occupation area
|Light equipment weight
|Low cost per ton of outlet water (filtered)
|Low backwash water volume
|Easily-cleaned filtering material
|Compatible to abents
|Excellent oil-removing effect
|Free of filtering materials replacement
|No short fiber migration
|Can get rid of the iron and manganese
The fiber filtering facility, a brain child of professor Fan-Qing Liu, is a high-tech equipment of international leading edge technology, which has won the rewards of Star of Invention / Innovation from U.N. and "the 45th Eureka International Invention Exposition" golden prize in Brussels. From the basis of the original design and the feedback from on-site operation, we have developed new type of products with more superior performance by continuing improvement.
Fiber filter uses fiber bundles as its filtering material, which is suspended with specific density in the filter. These fiber bundles can be formed into a loose and easily-washed deep-bed-filtration material. In the filter, a density adjustment device is designed to change the fiber density by the hydraulic power of inlet water, so the fiber bundle will become denser as the water passes through, and consequently helps achieve excellent filtration accuracy.
During the cleaning process, fiber bundles will be released by the hydraulic power and then scrubbed by the air-water in order to obtain complete regeneration. This kind of regenerating process can avoid the shortcomings such as un-uniform washing and the damage of filtering material caused by mechanical stirring.
According to the internal configuration and filtering methods, fiber filters can be categorized into three types.
Bag type filtration
One or several water bags are installed in the filter.
- Advantages ：
- The pressure of water bags can be adjusted for controlling fiber density so as to obtain the water quality with high accuracy.
Floating plate type
A floating plate is installed on the top of fibers, which can be driven up and down by the hydraulic power of raw water.
- Advantages ：
- Automatically driven up and down by the hydraulic power of raw water, the floating plate can reduce or increase the fiber density. Therefore, the excellent filtration accuracy and capacity can be achieved through the appropriate fiber density adjusted by the pressure from the floating plate.
Adjusting plate type
Fiber adjusting plate can be adjusted to stay at an appropriate position.
- Advantages ：
- From the fibers' own floating and sinking motion, the fiber bundles will be pressed or released, appropriately catching the suspended solids in the water to generate high filtration capacity.
ZL Type High Efficiency Fiber Filtering Equipment
A substitute for conventional sand filtering equipment used in common water filtration.
GS Type High-Speed Fiber Filtering Equipment
Used in the filtration of bypass water or the inlet raw water with better quality.
JD Type High Accuracy Fiber Filtering Equipment
Used for raw water with extremely high water quality, such as RO inlet or groundwater.
JW Type High Capacity Fiber Filtering Equipment
A substitute for sedimentation tank, used for reclaimed water, outlet of bio-reacting pool or other water source with higher suspended solids.
CY Type Oil-Bearing Wastewater Fiber Filtering Equipment
Used in the filtration of SPA water, swimming pool or other water source with little oil pollution.
Open Type Fiber Filtering Tank and Facility
Used for large systems such as tap-water plant and wastewater plant of industrial park where the treating requirement is above 10,000 tons per day.
|Reverse osmosis equipment pre-treatment
|Ion-exchange resin pre-treatment
|Wastewater discharge treatment
|Wastewater recycling treatment
|Removing the trace oil in water
|Direct cooling water dead end filtration treatment
|Side stream filtration of indirect cooling water
|Substitute settling tanks
|Simple filtration for the iron and manganese of groundwater
|Pre-filtration for sea water desalination
|De-iron filtration for close type system
|Filtration for the water of SPA and swimming pool
The pros and cons, fiber filtration vs. sand filtration
filtration volume:100M3 / Hr
|Conventional sand filtration
|Filtration rate (LV linear velocity)
High speed filtration：60~100m/hr
|Filtering surface area
|Normal filtration：3.3m2 (LV=30)
High speed filtration：1.25m2 (LV=80)
|10m2，large location area (LV=10)
|Backwash water volume
0.36 m3/m2/min × 3.3 m2 × 30 min/cycle = 36 m3/cycle
High speed filtration：
0.36 m3/m2/cycle × 1.25m2 × 30 min/cycle = 14m3/cycle
|2~3 times the standard outlet water (filtered) volume.
100 m3/hr × 2 × 30 min/cycle = 100 m3/cycle
|Total backwash water volume
|If washed once a day, the total backwash water volume per year is 15,330/5,840 m3, a much smaller consumption.
|If washed once a day, the total backwash water volume per year will reach 36,500 m3, which is a huge consumption.
|Deep bed filtration, high capacity, and relatively low backwash frequency.
|Shallow bed filtration, low capacity, and relatively high backwash frequency.
|The removing rate of suspended solids:
100% for 10μm diameter, ≧80% for 2μm diameter
|Only capable of removing suspended solids of 10μm diameter and above.
|Filtering material replacement
|Last for more than 10 years under normal operation.
|Once every 1 to 3 years, depending on fouling condition.
|Treatment for colloid and iron
|Capable of removing colloid, iron, and manganese.
|Not effective for colloid, iron, and manganese.
|No agglomeration impairing filtration effect.
|Microorganisms and pollutants will agglomerate on the filtering material to cause short circulating current during filtration.
|Filtration for oil
|Capable of removing oil.
|The filtering material will be fouled by oil.
|Less backwash water (lesser than outlet water (filtered) is required, which can be mixed with air to clean the fibers. Small power requirement.
|Much more backwash water volume (several times as much as raw water) and higher water head loss is needed, which requires larger power.
|Filtration water head loss
|Initial pressure is 0.2~0.4 kg/cm2. Backwash if pressure difference is 0.5~1.0kg/cm2.
|Initial pressure depends on the diameter of filtering material. Normally 0.5kg/cm2 Backwash if pressure difference is 0.5kg/cm2.
|Options for different applications
|Yes. Depend on demand.
|Light gross weight, about 18,000 kg
|Heavy gross weight, about 52,000 kg