{"id":4363,"date":"2022-06-27T17:30:51","date_gmt":"2022-06-27T17:30:51","guid":{"rendered":"https:\/\/apexenggroup.com\/?post_type=projects&p=4363"},"modified":"2023-12-14T19:44:07","modified_gmt":"2023-12-14T19:44:07","slug":"fargolime-softening-water-treatment-plant","status":"publish","type":"projects","link":"https:\/\/apexenggroup.com\/projects\/fargolime-softening-water-treatment-plant\/","title":{"rendered":"City of Fargo, ND<\/br>Lime Softening<\/br>Water Treatment Plant"},"content":{"rendered":"\t\t
The City of Fargo utilizes an intermediate ozone process in their lime softening water\u00a0treatment plant (LSWTP) as a primary disinfectant and to reduce taste and odor compounds prior to filtration. The LSWTP went online in 1997 and has had minimal\u00a0improvements since that time. Apex and Carollo were hired to evaluate the existing ozone process and propose improvements to the ozone process.<\/p>
A number of improvements ware proposed for the LSWTP ozone process; these\u00a0improvements are broken into two efforts: near-term improvements and long-term\u00a0improvements. Near-term improvements are fast-tracked improvements that are\u00a0intended to address immediate safety concerns. Long-terms improvements are\u00a0larger project or projects focused on increases in capacity and performance. Long-term\u00a0improvements are still being developed, while near-term improvements are\u00a0currently under construction.<\/p>
Near-term improvements include the following:<\/i><\/u><\/b><\/p> \u00a0<\/p> Existing ozone piping has experienced corrosion in locations where supplemental air\u00a0 has been mixed with ozone. Nitrous oxides are formed when ozone, nitrogen, and\u00a0moisture from ambient air are combined. This combination of gases and moisture then condenses in the piping. This has likely impacted all the piping downstream\u00a0of the supplemental air injection location, and may have had a localized impact upstream of the supplemental air. By segregating the supplemental air from the The existing diffusers will be replaced with state-of-the-art diffusers for fine-bubble diffusion that have no gaskets requiring periodic replacement. Since gas transfer efficiency is not a concern with supplemental air, a higher flow per diffuser can be\u00a0anticipated.<\/p> Access to the ozone contractors is provided through manways located on top of\u00a0the contractor which is over 25 feet deep. Operational staff members are lowered\u00a0into the contractors and must remove the diffusers, which are mounted several feet\u00a0above the contractor floor, to get to the floor for maintenance activities. New hatches\u00a0will be provided to each contractor along with bottom, improving access and safety\u00a0for operational staff. A fall protection cable configuration is included for use with\u00a0each ladder, as well as davit crane anchorage points at each new hatch to enable \u00a0<\/p> Construction of the near-term improvements was completed in March of 2020. PKG\u00a0Contracting of Fargo, ND was the contractor completing the improvements. Long-term\u00a0improvements are moving forward and include the following:<\/p> \u00a0<\/p> The design phase for the long-term improvements were completed in early 2021 with construction to follow.<\/p> \u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t Drinking Water<\/p> Planning\u00a0<\/p> Design<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t City of Fargo<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t Fargo, ND<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
ozone product gas, internal pipe corrosion will be dramatically reduced.<\/p>
extraction of personnel from each contractor, as the contractors are confined spaces.<\/p>Project Type<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
Owner<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
Location<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t