Evaluation of an Integrated Tertiary Treatment System for Ultra-Low Level Phosphorus Removal in Hayden, Idaho
The Hayden Wastewater Treatment Plant process consists of a headworks, equalization, enhanced biological nutrient removal, oxidation ditches, and secondary clarifiers. The facility produces typical effluent total phosphorus (TP) concentrations in the range of
Filtration with Inside-to-Out Ultrafiltration Membranes of Wastewater Containing Powdered Actgivated Carbon
This study presents and compares results obtained with inside-to-out polyethersulfone ultrafiltration membranes operated on three different wastewater streams in two locations. The first stream tested originated from a wastewater containing powdered activated carbon (PAC) added to a contact reactor with a long contact time and continuous coagulation. In the second stream, the PAC was added […]
Filtration with Inside-to-Out Ultrafiltration Membranes of Wastewater Containing Powdered Actgivated Carbon
This study presents and compares results obtained with inside-to-out polyethersulfone ultrafiltration membranes operated on three different wastewater streams in two locations. The first stream tested originated from a wastewater containing powdered activated carbon (PAC) added to a contact reactor with a long contact time and continuous coagulation. In the second stream, the PAC was added […]
Treating Variable TDS Feed Water: Cost-Effective Existing System Modification and Upgrade
The Collier County North County Regional Water Treatment Plant (NCRWTP) is a 20-mgd facility including a 12-mgd nanofiltration (NF) system and an 8-mgd brackish water reverse osmosis (BWRO) system. The existing BWRO system treats the Upper Floridan Aquifer Wells. Soon after the RO system installation in 1999, four of the new Floridan wells were discovered […]
Citywide Water Curtailment in Newport, OR – The Mystery of a Membrane Fouling That Created an Emergency Situation
The City of Newport, OR (City) operates a 6-million gallon per day (MGD) low pressure membrane water treatment plant (WTP). Starting mid-May 2020, the City experienced a rapid change in water production leading to an emergency situation four weeks later that caused a citywide water curtailment. Newport is a small town with a population of […]
Application of Two-Stage Ultrafiltration for High Water Recovery and Minimal Waste Discharge in Big Timber, MT
A two-stage ultrafiltration system designed, built, and commissioned for the City of Big Timber, MT, is described. After a thorough review of technology options, while determining how to bring their WTP system into compliance and work with existing infrastructure options and limits, the City elected to install a two-stage ultrafiltration system in part because of […]
Application of Two-Stage Ultrafiltration for High Water Recovery and Minimal Waste Discharge in Big Timber, MT
A two-stage ultrafiltration system designed, built, and commissioned for the City of Big Timber, MT, is described. After a thorough review of technology options, while determining how to bring their WTP system into compliance and work with existing infrastructure options and limits, the City elected to install a two-stage ultrafiltration system in part because of […]
Established Practices, Innovative Design, and New Products: A New Generation of Ultra High Pressure Desalination
In common parlance, reverse osmosis (RO) is often described as removing salt from water. In practice however, these processes squeeze water from a salt solution resulting in concentrate to be disposed or treated further in more expensive processes which pose significant challenges to the viability of a project. Disposal options may be cost-prohibitive or unavailable […]
Established Practices, Innovative Design, and New Products: A New Generation of Ultra High Pressure Desalination
In common parlance, reverse osmosis (RO) is often described as removing salt from water. In practice however, these processes squeeze water from a salt solution resulting in concentrate to be disposed or treated further in more expensive processes which pose significant challenges to the viability of a project. Disposal options may be cost-prohibitive or unavailable […]
A Novel Method for Modeling Brine and Permeate pH in RO and NF Systems
Concentrate pH in RO and NF applications plays a significant role in the formation of certain scales and the rejection of various contaminants. Incorrectly predicting pH can lead to excessive chemical costs or operational issues. Likewise, permeate pH is of utmost importance for determining post-treatment requirements for the product water. Most membrane and antiscalant projection […]
