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 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 is the treatment for sewage sludge?
The most common processes used to treat sludge are anaerobic digestion (AD), lime stabilisation and incineration. Of these, AD is the most popular, partly because it generates energy (heat, transport fuel, and electricity). More than 75% of sludge is now processed this way.
How does biological water treatment work?
Anaerobic wastewater treatment processes use bacteria to breakdown BOD (Biological Oxygen Demand), COD (Chemical Oxygen Demand), and other organic contaminants with the absence of oxygen. Anaerobic systems do not require the addition of air to the reactors, which lowers energy costs to operate the system.
What is biological treatment process?
Biological treatments rely on bacteria, nematodes, or other small organisms to break down organic wastes using normal cellular processes. Scientists have been able to control and refine both aerobic and anaerobic biological processes to achieve the optimal removal of organic substances from wastewater.
What is the function of aerobic biological attached growth process in waste water treatment?
The principle role microorganisms have in the attached-growth process is to convert dissolved and particulate organic matter, measured as biochemical oxygen demand (BOD), into cell mass.
What is activated sludge treatment process?
The activated sludge process is a means of treating both municipal and industrial wastewater. Flocs of bacteria are suspended and mixed with wastewater in an aerated tank, and the bacteria use the organic pollutants to grow and transform it to energy, water, CO2 and new cell material.
How does oxidation pond work?
Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae. Algae grow using energy from the sun and carbon dioxide and inorganic compounds released by bacteria in water.
What are the 5 steps of wastewater treatment?
- Step 1: Screening and Pumping.
- Step 2: Grit Removal.
- Step 3: Primary Settling.
- Step 4: Aeration / Activated Sludge.
- Step 5: Secondary Settling.
- Step 8: Oxygen Uptake.
- Sludge Treatment.
What are the 4 steps of water treatment?
4 Steps of Community Water Treatment
- Coagulation and Flocculation.
- Learn More.
- Recommended Readings.
How do you process sludge?
4-Step Wastewater Sludge Treatment Process
- Step 1 – Sludge Thickening. The first step in the sewage sludge treatment plan is called thickening.
- Step 2 – Sludge Digestion. After amassing all the solids from the sewage sludge begins the sludge digestion process.
- Step 3 – Dewatering.
- Step 4 – Disposal.
What is the first step in the sewage treatment process?