Case studies

 

HaloKlear DPS Semi-Passive System Construction Site: Harris County Flood Control District Field Trial

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The Summary:


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Dewatering Drilling Solids with HaloKlear Natural Flocculants

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Construction Dewatering Using HaloKlear Natural Flocculants

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The Challenge:

A construction company was in the construction phase of installing cement pipe sections that will become an underground conduit carrying stormwater away from a stretch of I-75. This conduit will discharge into a 4-acre stormwater detention pond that is 12’ in depth. During excavation, water was continually pumped away from well points to allow equipment and materials access. 


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Significant Savings in Oil and Water Separation

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The Challenge:

A large oil refinery in the US committed to safety, the environment, and continuously improving performance began a cost-cutting initiative in 2013. The Refinery management team tasked the waterside chemical supplier, an existing Dober partner, to reduce chemical spending plant wide and improve wastewater treatment plant efficiency. Dober’s partner decided to focus on finding a new coagulant for treating the oily waste streams at the PSO and IGF units within the wastewater treatment plant.

 


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Centralized Waste Treatment - Oil/Water Separation

 

The Challenge:

Centralized waste treatment facilities treat wastewater from a variety of industries. Much of the wastewater contains very high pollutant concentrations, which are extremely difficult to treat, such as emulsified oil. Industrial processes frequently subject oil to chemical and mechanical action causing it to be dispersed into the water. This emulsified oil does not simply float on the surface of the water and must be removed using more intense treatment techniques.


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DPS Use in the Construction of a Super Walmart

 

LOCATION: Denton, MD

The Challenge:

During the construction of a Super Walmart in Denton, MD, the construction company faced many issues while treating stormwater on the site. They were required to control NTU levels of effluent stormwater leaving the site into a nearby creek. Gravity settling and synthetic polymers were not working and spring rains were threatening. The company faced fines and complete project shutdown until compliance requirements from the Maryland Department of the Environment were met.


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Increased Environmental Performance at Large US Refinery

The Challenge:

A large oil refinery in the US committed to safety, the environment, and continuously improving supplier performance standards was faced with the challenge of increasing environmental performance and cutting costs for coagulant use in their wastewater processing units. This refinery has five different coagulant applications as part of its wastewater processing. In 2013, the refinery was challenged with the following: loss of a process water tank, a drive to improve environmental results at the wastewater treatment plant, and better cost control for the coagulant used throughout the refinery. The coagulant used at the PSO and IGF units was identified as an application where improvements in cost and performance could be made. To achieve this goal, a unique GreenFloc natural coagulant chemistry innovated by Dober’s Water Treatment Division was chosen for the treatment of the PSO and IGF units.


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DPS Semi-Passive Sediment Reduction

 

LOCATION: Baltimore Washington International Airport

The Challenge:

During a cut-fill phase of an industrial project, a company was responsible for filtering and discharging heavily contaminated water into a nearby basin within a protected forest conservation area. Impending rain events posed a particular challenge during the dewatering, as the underlying red clay threatened to wash into surrounding stormwater basins, creating sediment-filled water that would re-enter the environment with turbidity levels much higher than the MDE allowed.


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Stormwater Canals

 

LOCATION: Tampa, Florida

The Challenge:

In 2012, a contractor was tasked with cleaning up the stormwater canals lining the runways at Tampa International Airport. These canals had filled with vegetation and were no longer properly cleaning the stormwater runoff that flows into the Tampa Bay. The turbidity of the initial water effluent was 617 – far above the required 31.43 NTU set by state regulations. The project consisted of three large sections that need to be treated while guaranteeing against any harm to the aquatic and plant life in the Tampa Bay.


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Aggregate Stormwater

 

LOCATION: Frac Sand Mine, Wisconsin

The Challenge:

A frac sand mine in Wisconsin with limited space is in need of a treatment system for the stormwater collected on-site. During rain events, sand from the site is washed into and held in a retention pond with turbidity levels averaging about 1200 NTU. In order for the water to be discharged, the turbidity needs to be reduced to 70 NTU or below. Due to strict regulations set by the Department of Natural Resources, treatment options are limited to environmentally friendly, biodegradable solutions.


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The Balsa Inferior Hydroelectric Project

 

LOCATION: Rio Balsa

The Challenge:

The Balsa Inferior Hydroelectric project consists of a 4 km tunnel that will take water from the Rio Balsa through the tunnel down to a series of turbines and then returns to the river. The project will be a 45 megawatt facility when completed.


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I-75 Dewatering

 

LOCATION: Tampa, Florida

The Challenge:

A construction company was in the construction phase of installing cement pipe sections that will become an underground conduit carrying stormwater away from a stretch of I-75. This conduit will discharge into a 4-acre stormwater detention pond that is 12’ in depth. During excavation, water was continually pumped away from well points to allow equipment and materials access.


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Clay Mine Process Water

 

LOCATION: Paris, Tennessee

The Challenge:

A clay mine in Tennessee experienced annoyances with their system for treating the plant’s process water. Using dry alum to treat the water, the process demanded constant pH monitoring and adjustment with soda ash. The high maintenance, dry product was difficult to dose leading to inconsistent results and wasted product. Overall, the treatment was labor intense, inefficient in price, and inconsistent in performance. HaloKlear performed sample testing with the HaloKlear hybrid products to provide a solution to replace the alum and eliminate the need for pH adjustment. A pilot study was scheduled to treat two of the facility’s ponds.


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Food and Beverage - Solid/Liquid Separation

 

The Challenge:

Solid and liquid separation water treatment is necessary to prevent the build-up of solids in wastewater systems. Suspended solids, dissolved solids and colloidal solids contained in industrial effluent must meet requirements before being discharged. In the food and beverage industry, wastes are commonly biodegradable and non-toxic, however, there are usually high concentrations of biochemical oxygen and suspended solids, surfactants, antibiotics and growth hormones, and oils and fats incorporated in the water, creating the need for a complex treatment process.


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Mining and Mineral Processing - Process Water Treatment

 

The Challenge:

Process water is used in industrial plants, industrial processes and production facilities following extensive water pretreatment such as softening or demineralizing. The objective of treatment to process water is to be able to recycle the water for reuse and feedback into the industrial process. Process water created from the mining and mineral processing industry is commonly contaminated with suspended solids, metals acids and salts.


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