What is a Biotower?

What is a Biotower?

Bio Towers are biological treatment units used widely in effluent treatment plants. Bio towers use plastic media for increasing the specific surface area of the biological action. Bio towers are largely successful wherein the BOD in the effluent is high (as in Refinery effluents) and has advantages on shock loads.

What do you mean by attached growth process?

Attached-growth processes (also known as fixed-film processes) are biological wastewater treatment processes with the biomass attached to some type of media. The media normally found at wastewater treatment plants are rock, ceramic, plastic materials, and slag.

What is Zoogleal mass?

zoogleal mass (ZOE-uh-glee-ul) Jelly-like masses of bacteria found in fixed film and activated sludge processes. These masses may be formed for or function as the protection against predators and for storage of food supplies.

What are the 3 stages of wastewater treatment?

There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.

What are the types of trickling filters?

TYPES OF TRICKLING FILTERS

• 1 Low Rate Trickling Filter (LRTF)
• 2 High Rate Trickling Filter (HRTF)
• 3 Roughing Filter.
• 4 Two-Stage Trickling Filters.

How do aerated lagoons work?

Aerators, which are used instead of algae as the main source of oxygen in aerated lagoons, work by releasing air into the lagoon or by agitating the water so that air from the surface is mixed in. Aeration always causes turbulence and mixing in the lagoon.

What is the difference between suspended growth and attached growth processes in waste water treatment?

The suspended growth as in conventional activated sludge is a nominal process applied as a biological treatment in a water treatment plant. On the other hand, attached growth processes can be obtained by combining biofilm carriers and activated sludge in one treatment step.

What is the function of grit chamber?

Grit chambers are long narrow tanks that are designed to slow down the flow so that solids such as sand, coffee grounds, and eggshells will settle out of the water. Grit causes excessive wear and tear on pumps and other plant equipment.

What is a clarifier in wastewater treatment?

Clarifiers are settling tanks built with mechanical means for continuous removal of solids being deposited by sedimentation. A clarifier is generally used to remove solid particulates or suspended solids from liquid for clarification and (or) thickening.

What are the 5 steps of wastewater treatment?

Treatment Steps

1. Step 1: Screening and Pumping.
2. Step 2: Grit Removal.
3. Step 3: Primary Settling.
4. Step 4: Aeration / Activated Sludge.
5. Step 5: Secondary Settling.
6. Step 8: Oxygen Uptake.
7. Sludge Treatment.

Where is trickling filter used?

wastewater treatment
Trickling filters are used in wastewater treatment in which the organic contaminants are converted to carbon dioxide, water, and additional microorganisms in presence of oxygen. Complete answer: Trickling filters are used to remove organic matter from waste-water.

Is recycled in trickling filter?

One method of increasing the efficiency of a trickling filter is to incorporate recirculation. Recirculation is a process by which the filter effluent is returned to and reapplied onto the filter.

What is a bio tower in wastewater treatment plant?

The wastewater treatment is designed to dispose of industrial effluents so that there is no harm to humans. Bio towers are widely used in effluent treatment plants. It is a unit that makes use of oxidation of organic waste to reduce the value of the biological oxygen demand of liquid effluent.

What is a biological wastewater treatment system?

In a simplified, top-level answer to this question, a biological wastewater treatment system is a technology that primarily uses bacteria, some protozoa, and possibly other specialty microbes to clean water.

What are Biotowers and how do they work?

Biotowers can be arranged in series with inter-stage settlement. Fan ventilation may be incorporated where the biomass must be highly aerobic, for example where nitrification is required. Biotowers are used in the food and drink and other industries.

What is the surface area ratio of a biotower?

Media used for BOD removal has surface area ratios of 100-240 m2/m3. Nitrification requires the higher surface area media and low loading. A biotower may be up to 10 m high and requires energy to pump and recirculate wastewater over the medium.