Trickling Filter / Bio-Tower
Description
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. Aerobic conditions are maintained by splashing, diffusion, and either by forced-air flowing through the bed or natural convection of air if the filter medium is porous. The treatment of sewage or other wastewater with trickling filters is among the oldest and most well characterized treatment technologies which requires a small space unlike larger aeration system involving forced mechanical aerators.
Process description
A typical complete trickling filter system
A schematic cross-section of the contact face of the bed of media in a trickling filter
Typically, settled sewage flow enters at a high level and flows through the primary settlement tank. The supernatant from the tank flows into a dosing device, often a tipping bucket which delivers flow to the arms of the filter. The flush of water flows through the arms and exits through a series of holes pointing at an angle downwards. This propels the arms around distributing the liquid evenly over the surface of the filter media. Most are uncovered (unlike the accompanying diagram) and are freely ventilated to the atmosphere.
Trickling Filter / Bio Tower
Mech-Chem have expertise and can supply main rotary mechanism as
⦁ Turn Table or Drive Mechanism with Motor & Gear Unit.
⦁ Centre Pier
⦁ Stationary Influent Column,
⦁ Rotating Center Well & connecting Tie Rods
⦁ Turn Buckle, Distribution Arm,
⦁ Orifice / Spreader
Salient Features
⦁ It is a simple in construction and reliable secondary treatment unit for the wastewater treatment / Biological Process
⦁ Self-driven by a hydraulic force due to water jet spray or Motor driven with centre column mounted Turn Table unit.
⦁ It is used to degrade a variety of organic waste.
⦁ Trickling filter can resist shock loadings.
⦁ It efficiently oxidizes the ammonia or efficient in ammonium oxidation.
⦁ It aids to produce effluent free of BOD, COD, nutrients, suspended colloids etc. for small- to medium-sized communities STP.
⦁ Its construction requires a small land area, unlike constructed wetlands where large tracts of land are not available for land intensive treatment systems.
⦁ Rapidly reduce soluble BOD in applied wastewater.
⦁ Efficient nitrification units.
⦁ Durable process elements.
⦁ Low power requirements.
⦁ Easy for Installation with Moderate level of skill and technical expertise needed to manage and operate the system.