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The Proper Use of a Chemical Dosing System

Water is central to human society, and modern infrastructure is in place to ensure that only the cleanest and safest water is used. All sorts of chemicals, devices, and more are used in water treatment plants and sewers alike, from a belt filter press to a chemical dosing system to sludge dewatering in modern water treatment systems. What is there to know today about a chemical dosing system, waste removal from water, and the modern industry of cleaning up water for human use? A lack of water would be crippling, so it’s vital that everything, from a chemical dosing system to a septic tank, is in fine working order.

On Water

Only about 3% of all water on planet Earth is fresh water; that is, salt-free water used for industrial work, drinking, and swimming pools. Plenty of water treatment and filtration plants around the world are hard at work every day to maintain the world’s supply of fresh water. This often involves drawing up water from natural water tables, or re-purposing sludge or sewage for water. Plenty of water is pumped into these stations; at a wastewater treatment plant, the pumping systems use up 10-15% of all energy used by the entire plant. This is hard work, but the results are clear. Primary and secondary waste treatment methods can remove 85-95% of pollutants from wastewater before that water is disinfected and discharged into local waterways. This water may be used for home plumbing for the toilets, sprinklers, or faucets. Or, commercial uses such as car washes or swimming pools may use that water

Sometimes, sponges and squeezing rollers are used to remove water from sludge and solid waste, and this separates useful water from the true waste material. Many such facilities have sponge rollers, and after sludge and waste is fed into it, the results are clean water, and solid cakes of waste material. Other times, water may sit in large tanks and be purified with chemicals and have solid solvents removed as the water passes through filters. Meanwhile, a chemical dosing system may be used anywhere where dirty water may be found. Just what is a chemical dosing system?

A Chemical Dosing System

The job of an automated chemical dosing system is a fairly simple one. This piece of hardware will automatically inject reagents into wastewater, and this reagents are tasked with controlling and regulating septicity and odor emissions. Most often, a chemical dousing system may found near sewer manholes, pump stations, and rising mains, and anywhere else similar to that.

One such model of a chemical dosing system is a ferrous dosing unit. This dosing system will most often be installed to work on a sewer, where natural reactions occur. In sewers, hydrogen sulfide is regularly formed, and it creates a distinct bad smell. So, ferrous dosing units will add chemicals that make for alternate chemical reactions in the sewage, eliminating the smell. These added chemicals bind with the sulphides to reduce odor and gas emissions. If the system is working well, hydrogen sulfide emissions may be lowered as much as 95%, and the wastewater system’s corrosion due to hydrogen sulfide will e slowed down. All of this will comply with Work Health Safety (WHS) regulations.

Meanwhile, other systems may deposit magnesium hydroxide into the water, and this will raise the pH of the sewage above 8. This places the pH outside of the range where hydrogen sulfide typically forms, and this too can greatly lower hydrogen sulfide gas emission rates. The emissions may be lowered as much as 80% when this system is put in place and working well. calcium nitrate systems have a similar job, where they add nitrates to the water to reduce the production of hydrogen sulfide gas by up to 90%.

Such hardware should, like any other industrial asset, undergo regular inspections and maintenance. The wastewater network should be inspected and tested regularly to ensure that everything is in fine working order, and this includes chemical dosing systems. Otherwise, unsafe levels of sewer gases may develop in a populated area, and this may violate local or even federal safety standards. Data collection can help engineers optimize the efficiency of he system for future use.

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