Case Studies

Aeration Lagoon Technology To Be Showcased at WEFTEC.14

Miner, Mo., population 980, is a quaint rural community located halfway between St. Louis and Memphis, Tenn. The 20-year-old Miner Wastewater Treatment Plant faced a number of technical issues in 2012. The town’s old three-cell 0.302-mgd aerated lagoon had high levels of suspended solids. Its ammonia and nitrogen concentrations were above their targets.

“There was quite a bit wrong with the plant,” said Chief Operator Marvin Hatton.

No Longer for the Birds

The private wastewater treatment facility at Brakebush Brothers Inc.—a chicken products manufacturing plant in Westfield, Wis.—was good at removing breading and other byproduct solids from waste flows. But the rural plant—a “further processing” (post-butchering) facility—produces uncommonly heavy loads of fats, oils and grease (FOG) that were taxing the aerobic treatment process in its secondary treatment lagoon. It needed to introduce more oxygen and mixing into the plant’s lagoon to do an efficient, effective treatment job.

Creating Cash

The City of Newark, Ohio, was seeking relief from excessive electric bills through significant updates. Its Licking River wastewater treatment plant (WWTP), on the east side of the city, completed installation of EDI FlexAir MiniPanel bubble diffusers in its three aeration basins, its WAS tanks and a post-aeration tank. The total project cost was $1,875,875, of which $370,630 went for the diffuser equipment and installation.

Brewing Up Efficient Treatment

The Ommegang Brewery in Cooperstown, N.Y., unable to send its wastewater to the public treatment facility, built its own private 20,000-gpd industrial membrane bioreactor package plant. Planners wanted to make sure that every element of the treatment process was designed to take advantage of the latest in technological advancements to deliver optimal treatment in the least time, with the smallest possible footprint and highest level of efficiency and cost-effectiveness.

Up to Code

Originally designed for a 0.75-mgd capacity, the Grantsville Wastewater Treatment Plant receives residential wastewater from almost 10,000 residents in Grantsville, Utah, which is located just west of Salt Lake City. In 2009, the plant had significant trouble meeting the city’s discharge requirements for ammonia, TSS and BOD.

According to Ron Griffin, the plant’s operator, treated wastewater would violate discharge requirements so regularly that he had to withhold it for six months each year to limit violations.

Efficiency in the Air

Contract wastewater operators—Alliance Water Resources (AWR)—for the City of Bowling Green, Mo., wanted to reduce overall operating costs at their facility. The existing positive displacement blowers, jet aeration system and motive mixing pumps were targeted for evaluation and potential upgrade.

To achieve these goals, the city looked to AWR and Environmental Dynamics Inc. (EDI) for answers.


Say Cheese

F&A Dairy, founded in 1958, began manufacturing cheese at its Dresser, Wis., facility in 1974. Five years after the plant’s opening, F&A constructed an aerated lagoon wastewater treatment plant (WWTP) with land irrigation, employing static-tube coarse bubble aeration. The system was originally designed to process approximately 3,000 lb per day biochemical oxygen demand (BOD). The system operated with satisfactory levels of dissolved oxygen for many years.


Raising Standards

A wastewater treatment facility in Grantsville, Utah, operated on a lagoon aeration treatment system consisting of three treatment ponds with surface aerators and six storage ponds without any aeration equipment. The existing aeration system only allowed effluent to be discharged during summer months due to permit requirements. The city wanted a more efficient system that would allow a continuous discharge of treated effluent and have the capacity to meet future requirements for ammonia removal.

Powering Down

In 2009, the City of Menominee, Mich., decided its wastewater treatment plant was consuming excessive electrical power and faced a much-needed upgrade. The plant was using a 1044-unit ceramic disc system with an acid gas cleaning system. This system, installed in 1988, was deteriorating and needed to be replaced. The city worked with Honeywell Energy Services Group to reduce its electrical power consumption under a guaranteed contract. The city’s wastewater treatment plant had a significant potential to reduce power consumed, specifically in the activated sludge process.

Ease of Installation, Ease of Use

The Municipality of Emiliano Zapata in the state of Morelos, Mexico, located 60 miles south of Mexico City, is in an area of great hydrological affluence. Zapata required a wastewater treatment plant (WWTP) to reduce pollution of the hydrological resources of the region. The city hired HidroIndustrial S.A. de C.V. to build a wastewater treatment plant with the capacity to treat 30 liters per second of wastewater and provide an effluent with no contaminants to be used for public services or human contact, according to Mexican regulation.