Water Treatment Plant Design 5th Edition Pdf Download
Alysha Perry
Treating water often requires more than one technology to achieve the desired quality. Most software for water-treatment plant design does not allow you to optimize multiple-technology systems, requiring separate software and more of your time for setup and management.
The design of a water treatment facility is critical for its success. A carefully planned and laid-out facility stands up to the elements, treats water effectively and protects public health. It prioritizes the structural integrity of treatment and storage areas and is optimized for employee wellness and low environmental impact.
How can your company use design to set a new water treatment facility up for success? This guide takes an in-depth look at water treatment facility design and how to maximize its benefits for the facility and for the surrounding community.
Many countries lack the level of water treatment regulation of the United States. The World Health Organization (WHO) reports that about 2 million people worldwide get their water from a source contaminated with fecal matter. Every year, contaminated drinking water causes about 485,000 preventable deaths from diarrheal diseases and other illnesses.
A functional water treatment plant helps prevent illness and death from waterborne diseases. It keeps residents healthy and provides them with clean, fresh water, helping them enjoy a high quality of life.
As your company develops strategies for how to design a water treatment facility, you'll need to consider important factors like location, layout, equipment types, safety, odors, aesthetics and noise, and the specific effluent discharge criteria that apply will to the new plant.
For example, the ideal location for a new water treatment facility is out of the flood zone so floodwaters cannot sweep pollutants away as runoff and potentially contaminate groundwater or freshwater sources. It should be located away from nearby water sources but close to water areas that are suitable for receiving the treated effluent as discharge.
Many water treatments plants have layouts designed to minimize their impacts on the environment and the public. For example, many plants are sited downwind of nearby residents to minimize the odors that reach them. Buffer spaces of several hundred feet between the plant and the nearest residences are ideal for the same reason.
For example, primary clarifiers are often significant sources of odors, so many plants choose to design facilities that use alternative processes. Some avoid gravity sludge thickeners for the same reason. Plants may also be interested in incorporating screw processes or centrifuges that contain integral covers instead of using belt presses.
Another issue to consider is the transport of wastewater from various parts of the plant to the site of the odor scrubbers. The design team may want to consider enclosing or covering any processes that cause odors and including high-density polyethylene ducts for transport.
Other focused odor control and mitigation strategies are possible, including the use of biological and chemical agents to control odors. To help the facility manage these substances, the water treatment plant design team may want to include storage areas for the odor-controlling chemicals so the facility can always keep the necessary supply on hand. The team may also include dedicated scrubbing facilities where chemical treatment can safely take place.
Ideally, the design of a new water treatment plant accommodates all processes necessary for treatment, and those processes are optimized for the facility's layout. For example, if certain constraints require the facility to be relatively compact, the plant may choose to use membrane bioreactors (MBRs) because of their smaller footprints.
Some plants use biological scrubbers for odor control to minimize the addition of chemicals to the water. Further, adding biological scrubbers to a plant's layout can help minimize its visual impact on the surrounding environment. Biological scrubbers are generally not as tall as chemical scrubbers, so they stick out less in the landscape. These are also relatively easy to design in a way that keeps the area looking nice for residents while still allowing the plant to do its job.
However, despite the advantages of biological scrubbers, some plants prefer chemical scrubbers because they have used them for years and know they work reliably. Chemical scrubbers generally use nozzles to spray oxidants such as sodium hypochlorite and sodium hydroxide into the air rising from the wastewater. The chemicals bind to and oxidize odor-causing compounds in the air, generating harmless byproducts.
The type of equipment chosen for the plant often has an impact on the noise pollution generated. In some cases, design teams have little say in the equipment the plant uses. If they do, however, they can choose equipment with low decibel ratings to eliminate nuisance noise. For example, high-speed turbo blowers are often much quieter than equipment such as multi-stage centrifugal blowers or positive displacement blowers.
Even if the design team has no say in the equipment, it can develop a design that optimizes noise containment. Acoustic treatment to the walls housing the equipment can do a lot to help a plant quietly coexist with the surrounding community. Some types of equipment also come with acoustically insulated enclosures that the design team can use to muffle sounds.
Design teams will want to ensure they understand what effluent guidelines apply to the water treatment facility being planned. Consulting with the EPA and local regulatory authorities is a good first step. Then, they can set design quality objectives that ensure the facility will consistently be able to comply with the law.
Designing a water treatment facility is a complex undertaking, one that must take numerous details into account. When your company is thinking about how to design a water treatment facility, here are some of the steps that should make up the process:
First, it's a good idea to design the new water treatment plant so its exterior matches nearby buildings as much as possible. Your company may want to choose similar materials to those used in surrounding buildings, and it can also design the facility in a similar architectural style.
Finally, projects can use vegetation and landscaping to their advantage to improve the aesthetic qualities of the new water treatment facility. A water treatment plant might not seem like a place for carefully manicured lawns or beautifully planted flowers. However, small touches like these can do a lot to boost the community's attitude toward the new facility. If the plants have pleasant fragrances, they can also sometimes help mask the smells emanating from the plant.
Designers can optimize the plant's layout by arranging buildings in a way that allows for future expansions of the various treatment stages. It should also take advantage of prevailing winds and climate conditions to keep unpleasant odors away from residential areas.
In many cases, by keeping structures close together, designers can provide a plant layout that minimizes the need for extensive piping to transport waste at its various stages from one place to the next.
Aside from helping the design team assess its work in miniature before committing to it on-site, a 3D BIM model can help the plant manage its relations with the public. If nearby residents get word of a new water treatment plant coming to their neighborhood, they may become concerned and raise objections.
Adding commercial shade structures to your new water treatment facility design keeps employees cool in hot weather. It also ensures the outdoor areas of the plant remain hospitable for workers and maintenance crews all year.
Additionally, shade structures protect your outdoor tanks, treatment structures and storage facilities from overheating and sustaining sun damage. They prevent the occurrence of too much evaporation, which could lead to low water levels in tanks and cause dangerous chemical imbalances. Many local governments require water treatment plants to have shade structures in place to ensure safety around water treatment and storage areas.
Another reason the shade feels so much cooler than direct sunlight is the urban heat island effect. In urban areas, concrete buildings and infrastructure reflect heat, making urban areas about 1 to 7 degrees hotter in the daytime than rural areas. A water treatment facility, with its many industrial buildings and structures, may experience a similar effect, and that excess heat can cause damage and adverse health effects.
We are also happy to provide custom shade structures for your next water treatment facility project. Our in-house design and engineering teams can develop custom shade structures that blend with other elements of your design, minimize the aesthetic impacts of the project and keep employees and structures cool.
To enhance your next water treatment plant design with attractive shade structures, work with USA SHADE. We have years of experience providing shade structures for water treatment facilities. Our custom structures give your company the freedom to plan an ideal facility layout, knowing you can use shade structures to ensure employee safety and protect the structural integrity of buildings and tanks.
Take a look at our architectural studio page to learn more about our processes. Feel free to request a quote today, or contact us to learn more about including shade structures in your next water treatment plant project.
State regulation 401 KAR 8:100 requires that an approval be issued by the Division of Water (DOW) prior to start of construction on drinking water distribution and treatment plants. Prior to issuing a construction approval, the DOW reviews plans and specifications with respect to sanitary features of design.
Regulation 401 KAR 8:100 lists the requirements for the design, construction and approval of drinking water systems. The designs and specifications shall also meet the requirements contained in 401 KAR 8:100, the 2012 edition of Recommended Standards for Water Works, and the DOW General Design Criteria.