Headworks: One of the Most Important Parts of the Waste System
- Pumps. The first step in the cleaning process is to simply get the water from an influent well (i.e., the place it ends up after its journey through the public ...
- Screening systems. Once the water has been pumped into the headworks, it is sent through a complex set of screens. ...
- Grit removal. ...
- Let experience lead the way. ...
What is the purpose of a wastewater treatment plant?
Types of treatment plants
- Sewage treatment plants. This section is an excerpt from Sewage treatment. ...
- Industrial wastewater treatment plants. This section is an excerpt from Industrial wastewater treatment. ...
- Agricultural wastewater treatment plants. This section is an excerpt from Agricultural wastewater treatment. ...
- Leachate treatment plants. ...
What is the best method for wastewater treatment?
What Treatment Processes Are Used?
- Preliminary/Primary. Preliminary treatment normally includes screening the water to remove large objects and debris. ...
- Secondary. This is where your treatment options begin to diverge. ...
- Disinfection. This is sometimes referred to as the tertiary treatment phase. ...
- Sludge Treatment. ...
Why are wastewater treatment plants so important?
- tainted drinking water
- water scarcity and water shortages
- foul lakes and rivers
- lower numbers of aquatic species
- dangers to livestock
- reduced waterfront property values
Does the wastewater treatment plant smell bad?
While wastewater treatment plants do smell, it’s important to reduce those smells for several reasons. First, you don’t want people who live nearby to constantly complain to the town or city about the odors. Second, those odors are linked to harmful gases being released during the treatment process. Odor management helps protect the environment.
What do headworks do?
The function of them is to remove inorganics such as sticks, stones, grit and sand from the wastewater stream to protect and reduce wear on the downstream process equipment. Equipment in the headworks may include pumps, mechanical screens, screening compactors, grit removal systems and grit washing systems.
What is an influent structure?
The influent structure contains a flow measurement device, communitor, and a bypass bar screen. The purp. ose of the communitor is to cut the coarse sewage solids, such as trash, rags, and other large debris, into smaller particles that are easier to treat.
What is the objective of Comminutor of wastewater treatment?
Comminutors can be used in wastewater treatment to cut up and grind the coarse solids into smaller sizes so that this will eliminate the problems caused towards downstream operations especially clogging happening in pumps.
What is FBR in wastewater treatment?
FBR Process: An active water treatment process that utilizes microbes growing on a fluidized media bed to degrade or consume difficult contaminants. Fluidized Bed Bioreactor: Uses microbes, grown on a fluidized media, to transform toxic contaminants.
What is influent in wastewater treatment?
Influent is water, waste water or other liquid flowing into a reservoir, basin or treatment plant.
What do you understand by the term influent and effluent?
Influent is water that "flows in". This is the raw, untreated wastewater. Effluent means to "flow out". This is the treated wastewater.
What is the purpose of Comminutor?
What is a Comminutor? Comminutors (a.k.a. grinders, macerators) are used to reduce the particle size of wastewater solids. The terms "sewage grinder" and "comminutor" are two terms for a cutting device for sewage solids. The term "comminutor" originated with a device for chopping meat.
What is the function of Comminutor?
Sewage Grinders, also known as comminutors, are shredding and screening devices widely used in wastewater treatment plants and pumping stations. Comminutors break down wastewater solids in plant headworks and pump stations. The equipment gets heavy use and is a critical part of the wastewater treatment process.
What is Comminutor and grit?
Treatment equipment such as bar screens, comminutors (a large version of a garbage disposal that shreds material), and grit chambers are used on the wastewater as it first enters a treatment plant. The collected debris is usually disposed of in a landfill.
What is difference between Mbbr and MBR?
MBR can effectively improve sludge load, while MBBR belongs to biofilm process, both of which have good effect on organic pollutant treatment, including COD, BOD and ammonia nitrogen. MBR has obvious effects in treating SS, but it is a problem that it is easy to block the membrane.
What is the difference between SBR and Mbbr?
The main difference between MBR and SBR water treatment plant is MBR uses the membrane technology and SBR uses the phase separation with the gravity setting method. Membrane the physical barrier for separation gives more importance to treat sewage water than other methods.
Is Fab and Mbbr same?
The FBR system functions like the MBBR (Mixed Bed Bio Reactor), the only difference being, that where the MBBR uses small particles which are free moving within the reactor, while the FBR system has fixed bed material (substrate is produced from UV-stabilised polyethylene) on which the biofilm grows.
What is headworks in wastewater treatment?
The " headworks " of a wastewater treatment plant is the initial stage of a complex process. This process reduces the level of pollutants in the incoming domestic and industrial wastewater to a level that will allow the treated wastewater or effluent to be discharged into a stream, river or lake. This treated effluent also may be sprayed onto dedicated land areas where it is used for the irrigation of crops and even golf courses. The complete process includes preliminary treatment, primary treatment, secondary treatment and often tertiary treatment.
What is the complete process of wastewater treatment?
The complete process includes preliminary treatment, primary treatment, secondary treatment and often tertiary treatment. The treatment processes of a wastewater plant have become more and more sophisticated and the performance of the headworks is more important than ever. The function of them is to remove inorganics such as sticks, stones, ...
Why is a vortex pump not used?
This pump is used primarily for clean water, or treated effluent, and should not be used for raw wastewater or sludge applications because large solids and stringy material can easily cause plugging. The vortex, or torque flow, pump has an impeller completely recessed from the volute area.
What is the vortex action in a pump?
The vortex action created directs the flow of both the fluid and entrained solids entering the pump into the volute area, where centrifugal force pushes the flow out. The fluid and entrained solids do not enter the impeller, but pass from the suction line through the volute into the discharge line.
What is an axial pump?
The impellers are designed to be rounded and free of sharp corners and projections that would be likely to catch and hold rags and other stringy type materials. Axial pumps, commonly used in wet well installations, move liquid by the propelling or lifting action of the impeller vanes.
What is centrifugal pump?
Centrifugal pumps are classified into radial flow, mixed flow and axial flow types, according to the direction of flow in reference to the axis of rotation. The rotation axis of the pump shaft determines whether the pump is a horizontal or vertical unit.
Is washing and dewatering of screenings critical?
Therefore, washing and dewatering of the screenings is critical to maintaining a good screening process. Screens can be classified as coarse, fine and micro. Increasingly, treatment plants use a combination of coarse screens and fine screens.
What is water treatment?
Water treatment facilities in smaller towns and villages, as well as treatment works supporting institutions, prisons, resorts or remote facilities, have difficult choices to make when selecting their headworks systems. All require a solids-control strategy, but lower flows and smaller budgets limit the available equipment options. The necessary equipment is called upon to effectively screen out the solids and prepare them for disposal while meeting the financial constraints of the smaller facilities.
What happens if you choose the wrong headworks system?
The wrong choice can result in headworks systems that do not meet the required level of protection of downstream treatment processes, or a system that is too costly for the plant’s requirements.
Why is pretreatment important?
Because all wastewater debris starts at the headworks, proper screening and debris removal is imperative to the entire wastewater system. Pretreatment devices are designed to remove or reduce large solids like wood, cloth, paper and plastics, while also dealing with grit and excessive amounts of oil and grease.
Who is the manager of the Bridgewater Correctional Complex?
In the more than 62 years Leo DuBois has served as the manager of the wastewater treatment plant at the Bridgewater Correctional Complex in rural Massachusetts, he’s observed a curious stream of flushed debris. Dealing with the prison’s wastewater is a unique challenge, as inmates treat their toilets like trashcans. Everything from cigarette butts to jumpsuits and plastic baggies get sent down into the pumps to be weeded out at DuBois’ headworks facility.
Can a small plant have a screening washer?
Often a smaller plant will not have the capital for a screening washer and they must contend with smelly, wet screenings that attract both vermin and odor complaints from the community. By washing and compacting the solids, the handling and transport of the screenings is simplified and odor-free.
ABOUT HEADWORKS
Every day, Headworks International devotes its considerable resources to meet the world’s demand for our most precious resource – clean water. To meet the ever changing needs of the water industry, we’ve devoted decades to continuously engineer innovative wastewater treatment solutions that have become industry standards.
HEADWORKS AT WEFTEC, THE LARGEST US WASTEWATER SHOW
Gerald Seidl explains the key products and their position in the market.
Where is Tillman Water Reclamation Plant located?
A plant located in the Los Angeles area, owned and operated by the city of Los Angeles—the Tillman Water Reclamation Plant—houses a beautiful Japanese Garden on its property (below), which is regularly visited by tourists and has become a sought-after place for holding wedding ceremonies and receptions.
How to build a plant?
A good layout can often be helpful in public acceptance of the project. Consider the following: 1 Locate the plant downwind of residences and other concerned neighbors. 2 Keep some buffer between residences and the nearest plant facility (say 500 ft.). 3 Build odorous facilities farthest from residences (i.e. headworks). 4 Cover and/or house the odor causing facilities, provide necessary ventilation and air scrubbing.
How tall are chemical scrubbers?
The chemicals oxidize hydrogen sulfide and other odorous compounds producing innocuous byproducts. If the owners prefer chemical scrubbers, they usually will be tall (10 to 15 ft.), but can be hidden behind an architecturally designed wall facing the neighbors. In exceptional cases, the wall can have a nice mural painted on it to enhance appearance. [See Figure 1]
Can a plant degrade a neighborhood?
The plant should not degrade the neighborhood. This can be accomplished in a number of ways. The buildings associated with the project should match the buildings in the surrounding neighborhood—both architecturally and in materials selection. Sometimes, the fencing can be an eye sore.
Is membrane bioreactor better than activated sludge?
For example, membrane bioreactors (MBR), by virtue of their smaller footprint, may be a better treatment process than conventional activated sludge. In small size plants, with MBRs, it may be possible to eliminate primary clarifiers, which often generate more odors than other processes at the plant.
