Guide for technologies that power the activated sludge process

Chlorine gas (Cl2) is a highly effective oxidant and a relatively economical option for disinfection. Since Charles F. Wallace and Martin F. Tiernan discovered the first chlorine gas feed system in 1913 the Wallace & Tiernan® brand is a synonym for safe and reliable disinfection of water. Chlorine can be safely transported, easily applied, measured, and controlled. See below for more frequently asked questions regarding Gas Feed disinfection.

Clarifiers are an important component of the wastewater treatment process. However, between corrosion, maintenance, and changes in flow, it can be difficult to keep a clarifier operating at peak performance. In addition, changes in effluent regulations may require upgrades to meet new, more stringent requirements. To learn more about clarifiers and their maintenance, Allen Lepak, Clarification Product Manager with Evoqua Water Technologies provides expert advice on how to identify some common issues with clarifiers, how to maximize performance, and how to decide whether you should upgrade or replace your existing unit.

Get answers on ZLD cost, pretreatment, reliability, fouling control, and installation timeline. Learn how Xylem’s Vacom One-Step simplifies ZLD.

Learn how EnviroMix’s FlexZone system optimizes activated sludge processes.

England’s Northumbrian Water Ltd (NWL) serves roughly 2.5 million people with water and sewerage services. To better assess its predicted results they conducted a project to measure how much the installation of N-pumps had reduced their costs.

The French Community of Communes Albères Côte Vermeille Illibéris (CCACVI) is promoting a hypervision project to streamline its water cycle, based on the Xylem Vue platform.

In the face of climate change and cost and supply uncertainties, cities and municipalities must operate their plants and processes as efficiently and sustainably as possible. In this context, the town of Kaufbeuren recognized significant potential for energy optimization at its wastewater treatment plant.

Clayton County Water Authority (CCWA) is a good example of a utility that doesn’t let a confined geographical footprint stop it from thinking outside the box. As one of Georgia’s smallest counties in terms of land size area (only 143 square miles), its location near the top of a regional watershed means it has little area to gather precipitation into streams and rivers.

When the affluent, new home development was being established, odor control was top of mind. The wastewater treatment plant was in close proximity to the new development, which includes 900 acres (364 hectares) of preserved open space, including 24 miles (38 kms) of trails, 10 neighborhood parks, a community pool and water park, as well as outdoor sport courts.

Read how Adairsville’s North WWTP reduced aerobic digestion energy use with EnviroMix BioCycle-D by decoupling aeration from mixing and using automated aerobic and anoxic cycles, delivering more than 45% energy savings versus conventional diffused air mixing.

Read how the Eastside Wastewater Treatment Plant in Albertville, AL used the EnviroMix BioCycle-D™ process to simplify operations, reduce maintenance, and improve energy efficiency.

Read how Detroit Lakes, Minnesota met a 0.066 mg/L phosphorus limit by upgrading aerobic digestion with EnviroMix BioCycle-D, delivering 77% energy savings and over $100,000 in annual power cost savings while keeping phosphorus sequestered in the sludge.

See how Orlando’s Water Conserv II WRF improved denitrification by replacing diffused-air mixing with EnviroMix BioMix to lower dissolved oxygen in anoxic basins, reduce long-term O&M costs, and strengthen BNR performance and resiliency after high-flow events.

Read how HRSD used EnviroMix BioMix™ technology to improve biological nutrient removal, increase operational flexibility, and reduce O&M costs at the VIP Wastewater Treatment Plant.

See how Russellville’s Pollution Control Works reduced operating costs with BioMix compressed gas mixing and achieved 75% energy savings in Phase I and more than 60% in Phase II versus mechanical mixers.

See how SACWSD’s Williams Monaco WWTP reduced O&M demands by replacing submersible mixers with EnviroMix BioMix compressed gas mixing, delivering 50%+ energy savings for anoxic and anaerobic selectors.

Bowling Green Municipal Utilities (BGMU) provides commercial water and wastewater treatment and electrical power services to a population of more than 60,000 in the community of Bowling Green, KY.  In 2010, the BGMU wastewater treatment plant was approaching the end of its useful life, just as the utility’s operating permit was up for renewal.

Xylem Vue has helped to reduce Cuxhaven’s WWTP aeration energy requirements by over 26% and meet its effluent quality requirements.

Yorkshire Water’s Dynamic Maintenance Team identified that they required an easily deployable solution that delivered tangible benefits across the network.

LaForge Bioenvironmental operates a waste-to-energy facility in a northwest farming community of New Brunswick, Canada. The system is located on a 1,000 acre (405 hectare) mixed farming operation, which includes the LaForge Holsteins dairy.

The South Central Counties Solid Waste Agency, located in Hopewell, Pennsylvania needed a cost effective, on-site treatment system to treat 12,500 gpd of leachate and allow for future expansion.

Situated on the banks of the Delaware River, Logan Township, New Jersey has a long history of caring for its watershed and natural environment. In the early 70s, the town designed what has been described as “the nation’s first ecologically planned industrial complex,” Pureland Industrial Complex.

In 2004, a major west coast city began construction of two new interceptor sewers. The 12 foot diameter intercept lines relieve hydraulic overloading, but also created a number of turbulent areas where nuisance odors adversely affected the local residential community. These odors were primarily H2S at concentration levels of up to 150 ppm, as well as volatile organic contaminants (VOCs).