Case Studies

 

Zero Discharge Desalination

Reducing the demand on variable water sources and generating minimal waste

The City of Alamogordo, New Mexico (2010 Population: 30,403) is located in Otero County, approximately six miles from Holloman Air Force Base. The city is planning to install a 3 to 6 MGD desalination facility for the production of drinking water and must overcome significant challenges as outlined in their 40-year Water Development Plan (2005 - 2045). Such challenges include the need for new water supplies for a growing population, the region's dry climate (Annual Rainfall: 11.4 inches), and variability in available surface water.

Hydrotech Discfilters

Using Discfilter techology to successfully replace and retrofit a facility's aging media filters

The Oconomowoc, WI Wastewater Treatment Facility (WWTF) needed to repair or replace the existing shallow bed traveling bridge sand filters. The sand filters had reached the end of their lifespan and needed significant maintenance improvements to continue to be viable. In addition, the facility needed to upgrade the filtration capacity from 9 million gallons per day to 12 million gallons per day in order to allow treatment of peak capacities. The City of Oconomowoc worked with engineering firm Ruekert/Mielke to evaluate various technologies to replace the existing filters.

NEOSEP® MBR

Upgrading to 4 stage biological process with a membrane bioreactor system

In recent years, the robust growth of residential and commercial development in the Outer Banks of North Carolina has put a strain on many of the wastewater services in the area. The Monteray Shores WWTP in Corolla was limited to a maximum hydraulic capacity of 180,000 gpd and was orignally configured only for BOD, TSS and NH3 removal but additional capacity and improved capabilities would be required.

AnoxKalnes Hybas™

Increasing Hydraulic loading and lowering Total Inorganic Nitrogen

In 2007 the Yucaipa Valley Water District in Yucaipa, CA upgraded their Activated Sludge treatment plant to a Kruger AnoxKaldnes Biofilm + Activated Sludge (HYBAS™) process. The plant expansion was driven by an increase in hydraulic loading and a new Total Inorganic Nitrogen Limit that was lowered from 10 mg/L to 6 mg/L.

Hydrotech Discfilters

Meeting new Phosphorus limits and Title 22 limits for reuse water.

The Mankato Wastewater Treatment Plant needto meet new water quality requirements of 1mg/L Total Phosphorus limit by 2015 as well as supplying Title 22 reuse water to a local energy facility.

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AnoxKaldnes™ K1 Media

Meeting ammonia permit limits in a small footprint at cold temperatures with ease of operation

The Fairplay Sanitation District was challenged in meeting their ammonia permit limits and wanted a process that would produce a stable effluent in a small footprint. Influent water temperatures were regularly recorded in between 6°C and 10°C. Due to these cold temperatures, nitrification was not being achieved on a consistent basis.

ACTIFLO®

Clarification and filtration upgrades to provide a total treatment capacity of 6 MGD

The city worked with Wright-Pierce Engineers to preserve the historic value of the buildings at the Somersworth plant while improving both TOC removal rates and the plants disinfection regime. The ACTIFLO® technology had to be integrated into an 1895 plant environment while maintaining existing operations during construction and upgrading the plant from a 3 MGD flow to a 6 MGD flow.

AnoxKaldnes Hybas™ Hydrotech Discfilter

Upgrade Wildcat Hill Wastewater Treatment Facility to achieve more stringent effluent limits

In order to achieve more stringent effluent limits, the City of Flagstaff upgraded the Wildcat Hill Wastewater Treatment Facility, located in northern Arizona. The facility produces a high quality effluent, as well as reclaimed water, which is distributed throughout the region to construction companies and golf courses.

Carbon Footprint - Hydrotech Discfilter

Hydrotech Discfilter vs. Conventional Sand Filters

A carbon footprint analysis was performed comparing tertiary filtration technologies: the Kruger Hydrotech Discfilter and conventional sand filters. The Hydrotech Discfilter employs woven cloth filter elements installed vertically on multiple discs, supplying a large filter area with a small footprint.

Carbon Footprint AnoxKaldnes™ MBBR

Fort Myers WRF Life Cycle Carbon Footprint Evaluation

"The carbon footprint analysis was conducted considering both the embodied carbon for the construction and implementation of the alternatives as well as the operational equivalent CO2 emissions for power, methan (CH4) and N2O."

BioCon®

Removing moisture from biosolids to reduce diposal costs and combate odor issues

The City of Buffalo was faced with numerous challenges such as rising disposal costs, odor issues, and an increase in plant capacity due to the expected increase in population from approximately 15,000 to 30,000 by 2025.

AnoxKalnes Hybas™

Upgrading plant to meet Total Nitrogen mass load into the James River

The James River Treatment Plant, owned by Hampton Roads Sanitation District, has upgraded to meet the Total Nitrogen mass load in order to produce an annual average concentration of 10 mg/l.

AE-DENITRO Ditch Hydrotech Discfilter

Increasing capacity and adding the production of relaimed reuse water

The City of Palm Coast, located on the east coast of Florida, expanded their existing Wastewater Treatment Plant (WWTP) to increase capacity to 6.83 MGD due to population growth, as well as add the production of reclaimed reuse water for use within the City.

BIO-DENITRO Ditch Hydrotech Discfilter

Kruger's BIO-DENITRO system, followed by the Kruger Hydrotech Discfilter, achieved the goal of producing high quality effluent for reclaimed water

In order to meet the demand of growth within the city and to achieve stringent effluent limits, the City of Sanford worked with CPH Engineers to design the Sanford South Water Resource Center (WRC), located in the heart of Central Florida. The facility produces a high quality effluent, as well as reclaimed water, which is distributed throughout the region.

LagoonGuard™

Stricter wastewater treatment regulations forced the town of Johnstown, Colorado to examine alternatives for an upgrade to their existing system

The city chose to install the AnoxKaldnes™ LagoonGuard™. Two trains of two Moving Bed Biofilm Reactors in series were added after Lagoon 2, along with a DAF at the end of the treatment process of Lagoon 3.

AnoxKaldnes™ K1 Media

The City and County of Broomfield, Colorado, with a population of 48,000 was in need of improved wastewater treatment to meet effluent guidelines for phosphorus, ammonia, nitrates and BOD removal from their wastewater

Broomfield WWTP upgraded from 5.4 MGD to 8.0 MGD without having to increase aerobic tank volume. Broomfield WWTP now operates at a MLSS aerobic SRT of 3.5 - 4.5 days withstanding winter temperatures of 55°F and maintains complete nitrification and Total Nitrogen of less than 10 mg/L. In addition, Broomfield operates with secondary effluent concentrations for BOD and TSS of <5 mg/L.