What are trickling filters in wastewater treatment?
What are trickling filters in wastewater treatment?
Trickling filters (TFs) are used to remove organic matter from wastewater. The TF is an aerobic treatment system that utilizes microorganisms attached to a medium to remove organic matter from wastewater.
What is the trickling filter process?
A trickling filter is a type of wastewater treatment system. It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of media.
What are the types of trickling filters?
There are gennerally three types of filter media including rock (or slag), redwood, and synthetic materials. Rock is the original media used in trickling filters.
What is the advantage of trickling filter?
4.2. 1 Trickling filters
| Advantages | Disadvantages |
|---|---|
| Simple and reliable | Need to additional treatment |
| Low power requirement | Vector and odor problems |
| Need to moderate level of technical expertise for managing the system | Need to regular operator attention |
How many types of trickling filters are used in sewage treatment?
4. How many types of trickling filters are used in sewage treatment? Explanation: The trickling filters are divided into conventional and high rate trickling filters.
What is high rate trickling filter?
Features of High-Rate Trickling Filters: The rate of loading is increased by adopting the process of recirculation of sewage in high-rate trickling filters. It consists of pumping back a part of the filter effluent or final effluent (i.e., effluent from the secondary settling tank) to the filter unit.
What is the depth of trickling filter?
What is the depth of the trickling filter? Explanation: A typical trickling filter is circular and between 10 meters and 20 meters across and between 2 meters to 3 meters deep.
What is the life of media used in trickling filter?
The treated effluent goes directly into the soil below. Due to the organic nature of the peat, the filter media must be replaced periodically. Normal life expectancy is between 10 and 15 years.
What is staging in STP?
The Sewage Treatment Process essentially includes three stages. The three stages can be divided into primary, secondary, and Tertiary. In each step, water is purified to the next level to access clean water for humans and the environment.
What is low rate trickling filter?
The low-rate trickling filter is the most common biological treatment process used in small and medium sized sewage works in the UK. It produces an inconsistent effluent quality, which has traditionally been related to seasonal changes in solids accumulation, grazing activity and sloughing of microbial film.