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No two WWTP safe access solutions are identical as the type of water being treated, facility size, and climate greatly effects the critical design criteria that will ensure that optimum safety and productivity can work together in harmony.
Wastewater is used water. It includes substances such as human waste, food scraps, oils, soaps, and chemicals. In homes, this includes water from sinks, showers, bathtubs, toilets, washing machines, and dishwashers. Businesses and industries also contribute their share of used water that must be cleaned.
We consider wastewater treatment as a water use because it is so interconnected with the other uses of water. Much of the water used by homes, industries, and businesses must be treated before it is released back to the environment.
If the term “wastewater treatment” is confusing to you, you might think of it as “sewage treatment.” Nature has an amazing ability to cope with small amounts of water wastes and pollution, but it would be overwhelmed if we didn’t treat the billions of gallons of wastewater and sewage produced every day before releasing it back to the environment. Treatment plants reduce pollutants in wastewater to a level nature can handle.View Full Text
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Below are some of the loading and unloading solutions for illustrative purposes only. Our experts will work with you and your team for a custom solution to suit your needs.
WWTP Loading Arms
Sludge is typically loaded into tank trucks via 6″ carbon steel loading arms. The current best loading practice includes a vapor plate or cone with a 2″ to 3″ vapor line. Many times waste water treatment plants are located near populated areas where vapor and odor control is required to meet EPA standards.
Typical seal material for the loading arm swivel joints is PTFE, which is durable and chemical resistant.
These racks can also be designed to handle other chemicals used in water treatment facilities to meet EPA mandated discharge permits such as anti-foaming agents, pH neutralizers, coagulants, and flocculants.
WWTP Loading Gangways and Safety Cages
24″ Self-adjusting access gangways are required to safely access the varying height trucks that typically transport chemicals and waste product. Durable marine-grade aluminum and stainless steel options provide years of maintenance and corrosion-resistant service. Powered gangway solutions are also an option, with both hydraulic and pneumatic solutions being commonly used.
Each gangway will be fitted with a four-rail safety cage for the tank truck hatch area. It creates a secure 4’x6′ barrier to falls while the operator (un)loads the product. These systems have engineered layouts to ensure safe access and fall protection equipment works in conjunction with the loading arms.
GX SELF-ADJUSTING STAIR (SAS) GANGWAY
SafeRack’s NEW GX SAS gangways uses Retractalok power-assist technology allowing operators to raise or lower effortlessly, light as a feather to lift, solid as a rock. Tested in the most critical applications, this revolutionary new gangway outperforms all others. Available in multiple lengths and widths. Learn More
WWTP Eye Wash/Drench Showers
ANSI guidelines state that an Eye Wash/Drench Showers need to be located 10 seconds or 55’ (16.8m) from contaminants or hazardous materials.
Eyewash stations need to be on the same horizontal plane with no obstructions.
Therefore, we would propose the installation of a standard combination Drench Shower/Eyewash Unit, which will save limited space and fit easily into any work environment.
WWTP Spill Containment
Spill containment pans will be provided at the point of loading operations and is an essential piece of equipment in overall site safety and environmental protection
Because wastewater treatment plants have pipe runs throughout the facility, ErectaRack pipe racks are pre-fabricated for a variety of pipe dimensions and applications. Because they’re pre-engineered, ErectaRack skips the long engineering and fabrication process, saving weeks, if not months in the installation process.
While not highly flammable, high airborne concentrations of certain products and chemicals can be ignited and pose a significant fire and explosion hazard, especially in confined spaces. Industry best practice includes the grounding of all vessels prior to starting the (un)loading process.
- Vehicle grounding and bonding — ensure true grounding before product flow is permitted
Safety Gates for WWTP Stair, Ladder, and Platform Applications
Safety Gates will be installed at the top of stairs and any other openings to ensure operator safety at all times.
YellowGate Safety Gates
SafeRack’s line of industrial safety gates is the most flexible product on the market with the ability span openings between 16” and 36” and is field adjustable with nothing more than a wrench. Learn More
WWTP Loading Platform Options
- Lighting – General exterior and task lighting to illuminate work and walk areas.
- Platform & Canopies – Full platform canopies reduce exposure to the elements and improve the safe and productive loading operation from the operator’s perspective.
- Operator Shelter – Depending on your site requirements, consideration should be given to the requirement of an operator or guard building to keep personnel out of the elements. This can be customized to meet specific site requirements.
- Wheel Chocks – SPCC options to allow for safe access and storage of water treatment chemicals.
Personal Protective Equipment PPE Requirements
Eye/Face Protection: Wear chemical safety goggles. A face shield (with safety goggles) may also be necessary.
Skin Protection: Wear chemical protective clothing e.g. gloves, aprons, boots. Coveralls or long sleeve shirts and pants in some operations. Wear a chemical protective, full-body encapsulating suit, and self-contained breathing apparatus (SCBA). Suitable materials include: butyl rubber, neoprene rubber, Viton®, Viton®/butyl rubber, Barrier® – PE/PA/PE, Silver Shield® – PE/EVAL/PE, Trellchem® HPS, Trellchem® VPS, Saranex®™, Tychem® BR/LV, Tychem® Responder® CSM, Tychem® TK. The following materials should NOT be used: natural rubber, polyvinyl chloride. Recommendations are NOT valid for very thin neoprene rubber gloves (0.3 mm or less).
Respiratory Protection: Up to 5 ppm:
(APF = 10) Any chemical cartridge respirator with cartridge(s) providing protection against chlorine*; or Any supplied-air respirator*.
*Reported to cause eye irritation or damage; may require eye protection.
APF = Assigned Protection Factor
Recommendations apply only to National Institute for Occupational Safety and Health (NIOSH) approved respirators. Refer to the NIOSH pocket guide to chemical hazards for more information.
Use a local exhaust ventilation and enclosure, if necessary, to control the amount in the air. Consider using a corrosion-resistant exhaust ventilation system separate from other ventilation systems. It may be necessary to use stringent control measures such as process enclosure to prevent product release into the workplace. Use backup controls (e.g. double mechanical pump seals) to prevent the release of this material due to equipment failure. * For illustrative purposes only. Our experts will work with you and your team for a custom solution to suit your needs
We recommend that you also refer to the Chlorine Institute, found at chlorineinstitute.org. The Chlorine Institute (CI) was founded in 1924 and is a technical trade association of companies involved in the safe production, distribution and use of chlorine, sodium and potassium hydroxides and sodium hypochlorite, the distribution and use of hydrogen chloride and the distribution of vinyl chloride monomer.
Effects of wastewater pollutants
If wastewater is not properly treated, then the environment and human health can be negatively impacted. These impacts can include harm to fish and wildlife populations, oxygen depletion, beach closures and other restrictions on recreational water use, restrictions on fish and shellfish harvesting and contamination of drinking water. Environment Canada provides some examples of pollutants that can be found in wastewater and the potentially harmful effects these substances can have on ecosystems and human health:
- Decaying organic matter and debris can use up the dissolved oxygen in a lake so fish and other aquatic biota cannot survive;
- Excessive nutrients, such as phosphorus and nitrogen (including ammonia), can cause eutrophication, or over-fertilization of receiving waters, which can be toxic to aquatic organisms, promote excessive plant growth, reduce available oxygen, harm spawning grounds, alter habitat and lead to a decline in certain species;
- Chlorine compounds and inorganic chloramines can be toxic to aquatic invertebrates, algae and fish;
- Bacteria, viruses and disease-causing pathogens can pollute beaches and contaminate shellfish populations, leading to restrictions on human recreation, drinking water consumption and shellfish consumption;
- Metals, such as mercury, lead, cadmium, chromium and arsenic can have acute and chronic toxic effects on species.
- Other substances such as some pharmaceutical and personal care products, primarily entering the environment in wastewater effluents, may also pose threats to human health, aquatic life and wildlife.
The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. As solid material decays, it uses up oxygen, which is needed by the plants and animals living in the water.
“Primary treatment” removes about 60 percent of suspended solids from wastewater. This treatment also involves aerating (stirring up) the wastewater, to put oxygen back in. Secondary treatment removes more than 90 percent of suspended solids.
Steps in the wastewater treatment process.
Wastewater entering the treatment plant includes items like wood, rocks, and even dead animals. Unless they are removed, they could cause problems later in the treatment process. Most of these materials are sent to a landfill.
The wastewater system relies on the force of gravity to move sewage from your home to the treatment plant. So wastewater-treatment plants are located on low ground, often near a river into which treated water can be released. If the plant is built above the ground level, the wastewater has to be pumped up to the aeration tanks (item 3). From here on, gravity takes over to move the wastewater through the treatment process.
One of the first steps that a water treatment facility can do is to just shake up the sewage and expose it to air. This causes some of the dissolved gases (such as hydrogen sulfide, which smells like rotten eggs) that taste and smell bad to be released from the water. Wastewater enters a series of long, parallel concrete tanks. Each tank is divided into two sections. In the first section, air is pumped through the water.
As organic matter decays, it uses up oxygen. Aeration replenishes the oxygen. Bubbling oxygen through the water also keeps the organic material suspended while it forces ‘grit’ (coffee grounds, sand and other small, dense particles) to settle out. Grit is pumped out of the tanks and taken to landfills.
4. Removing sludge
Wastewater then enters the second section or sedimentation tanks. Here, the sludge (the organic portion of the sewage) settles out of the wastewater and is pumped out of the tanks. Some of the water is removed in a step called thickening and then the sludge is processed in large tanks called digesters.
5. Removing scum
As sludge is settling to the bottom of the sedimentation tanks, lighter materials are floating to the surface. This ‘scum’ includes grease, oils, plastics, and soap. Slow-moving rakes skim the scum off the surface of the wastewater. Scum is thickened and pumped to the digesters along with the sludge.
Many cities also use filtration in sewage treatment. After the solids are removed, the liquid sewage is filtered through a substance, usually sand, by the action of gravity. This method gets rid of almost all bacteria, reduces turbidity and color, removes odors, reduces the amount of iron, and removes most other solid particles that remained in the water. Water is sometimes filtered through carbon particles, which removes organic particles. This method is used in some homes, too.
6. Killing bacteria
Finally, the wastewater flows into a ‘chlorine contact’ tank, where the chemical chlorine is added to kill bacteria, which could pose a health risk, just as is done in swimming pools. The chlorine is mostly eliminated as the bacteria are destroyed, but sometimes it must be neutralized by adding other chemicals. This protects fish and other marine organisms, which can be harmed by the smallest amounts of chlorine.
The treated water (called effluent) is then discharged to a local river or the ocean.
Customer Reviews5 5Some companies still know how to do business efficiently.
I just wanted to drop a line to express my pleasure with your product. The crossover steps and platform went together with relative ease and the customer is very happy with them. Additionally, your customer service was top notch from the moment I contacted you all and I didn’t have to wait for shop drawings, quotes or answers to my questions. My order was relatively small but your company treated me like a very important customer. Thank you for prioritizing my order and selling me a top quality product. I would recommend you folks to any one of my colleagues with the highest regard.By Ryan Pelletier from Raymond R. Houle Construction on 6/5/174 5Very versatile and well built product.
Very responsive. I went to the website, sent an email and received a response within the hour, plus good follow up after purchase. Quick shipping, great price, very versatile and well built product.By Richard Nelson from Weyerhaeuser NR Company on 11/14/134 5They did a great job and were very safe.
We like the turnkey design. The installation by SafeRack was fantastic. They did a great job and were very safe. Our technicians were very satisfied with their work. Greg Crawford was very responsive and good to work with.By Brandon Grimm from Clariant Corporation on 1/6/115 5The SafeRack team went above and beyond even after the sale.
I wanted to drop you a line in regards to a new railcar access structure Croda purchased from Saferack. In my 25 years as a chemical engineer I have purchased numerous racks and fall protection equipment from a number of suppliers. By far, with no exception, have I ever dealt with a more professional customer oriented company than yours. Ray Evans and Charles Phillips spent much time convincing me to purchase(both equipment and installation) from Saferack. Unlike most sales people, they did not forget about me after winning the order. They, as well as your design team,endured several revisions driven by me and in the end we came up with a great design. Linda Hardee has been the most responsive customer service person I have ever worked with. She has worked very hard to provide me everything I have needed. Whenever I needed data, drawings, schedules, contractor approvals, insurances, permits, etc – a reply from her was always very prompt. Last, but not least, I need to praise the installation team. I was a little concerned when only two old guys, Richard Hester and David Gunny Smith showed up on site to install this big structure. These two gentlemen methodically erected this structure, efficiently, safely, and in 90 degree weather to boot. In my 25 years of construction, I have never seen more knowledgable, trained, properly documented, and safety conscious personnel than Richard and Gunny. With the folks you have on board I have no doubt your company has a bright future. If I am in a position to make future purchases in this industry, I know who I am going to call. Thank you for a great product and exceptional service.By Bob Cooney from Croda on 10/28/104 5SafeRack comes through AGAIN!
Everyone I dealt with at SafeRack during this emergency did what it took to get our facility back up and running in the shortest time possible. The replacement unit bolted on even though it was a new model. SafeRack comes through AGAIN!By Douglas Pumphrey from Suncor on 7/1/145 5Thank you for your fast service.
Our main concerns here [are] safety and reliability. The gangways have proven to be the safest option for gaining access to the rail cars. The units have been very dependable, including one unit that is over 15 years old, and they were innovative. Due to difficulty placing all the tankers, SafeRack incorporated two of the gangways on a sliding track allowing for much needed adjustment.By Randy Mehalko from Domtar Paper Company, LLC on 5/29/18
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Located in South Carolina
Located in South Carolina
Located in South Carolina
Located in South Carolina
Located in South Carolina