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Water Treatment | Options and Services | Treatment Systems | Case Studies | Equipment Catalogue PDF (1.7MB) | Water Treatment Newsletter PDF (400K)

CONFIGURATION OF NEUTRA-MILL WATER TREATMENT SYSTEMS

Earth Systems' Water Treatment systems are scaled to your requirements from off-the-shelf systems to more sophisticated custom-built, remotely-monitored integrated treatment systems. These units can be easily coupled with a purpose designed reagent storage and delivery systems. We develop the solution to satisfy your treatment needs.

OFF-THE-SHELF SYSTEMS
Off-the-shelf Water Treatment Systems are portable, light-weight systems that are easily transported between sites for short term once-off and/or long term routine treatment applications. Where appropriate, such systems are based on our patented Neutra-Mill Technology. They can also be coupled to work with or supplement existing treatment plants and integrated with existing or new PLC based or SCADA electronic control systems. These systems typically have reagent outputs of up to 5 tonne/hr.

The off-the-shelf systems include land based or water based models allowing significant flexibility in providing cost effective water treatment solutions. Some examples of "off-the-shelf" systems include:

A. Multi Purpose Neutra-Mill - suitable for many water treatment applications, including treatment of acid mine drainage.

B. Turbidity Mill - designed to efficiently and rapidly remove turbidity and suspended solids, can also dispense other reagents (biological media, adsorptive clays) throughout the upper layer of a water body. Used at minesites and for potable water.

C. HALT System - (under development) - designed to utilise low-cost limestone aggregate for the treatment of acidified drainage (eg. replacing anoxic limestone drains), suitable in areas affected by acid sulphate soils and acid rain.

D. Storage and delivery system - low-cost portable systems designed to add flexibility and increase the level of automation of your water treatment system.

A. Multi Purpose Neutra-Mill

Key benefits
• Efficiently mixes and dispenses numerous reagents.
• Exceptional ability to dispense hydrated lime and quicklime for pH adjustment.
• Removes precipitates that coat reagent particles and hinder reagent dissolution.
• Improved reagent efficiency = reduced operating costs.

General Description
Multi Purpose Neutra-Mill Water Treatment Systems are suitable for many water treatment applications, and are currently used throughout the world in the treatment of acid drainage. They are extremely efficient in dispensing low cost reagents including hydrated lime (Ca(OH)2) and quicklime (CaO). This system has significantly lower capital cost and comparable or lower operating costs than conventional systems with the same reagent output.

Model 1015/4P treating acidic waters. The reagent suspension plume is clearly visible around the unit. Note the white feed chute supplying reagent to the system.

Model 1015/4P - Water based.

Primary Applications
pH control, acid neutralisation, lowering toxic metal concentrations, lowering total dissolved solids.

Secondary Applications
control of nutrients, turbidity and suspended solid reduction, odour control.

Model 0710/1717 - Land based.

Primary Applications
pH control, acid neutralisation, lowering toxic metal concentrations, lowering total dissolved solids, turbidity and suspended solid reduction.

Secondary Applications
control of nutrients, dispensing biological or adsorptive media.

Sales, contract treatment, lease | Case studies

B. Turbidity Mill

Key benefits
• Rapidly batch treats water bodies with flocculant.
• Easily transported from site to site.
• Portable treatment system = reduced capital costs.

General Description
The Turbidity Mill Water Treatment System is extremely effective in reducing turbidity and suspended solids in standing water bodies without the need to pump the entire water body through a treatment plant. The Turbidity Mill is placed on the water body requiring treatment and is propelled around the surface of the water body as it dispenses the reagent, providing batch treatment of an entire water body.

The Turbidity Mill is removed from the water body once treatment is completed and transported to the next water body requiring treatment. The capital spent on the treatment system is not locked up at one site but is transported to where treatment is required, providing significant cost savings. This water treatment system is the solution to many emergency response treatment requirements for drinking water storages following floods, earthquakes and other natural disasters. The simplicity, portability and low operating and capital cost of the Turbidity Mill makes it suitable for treating drinking water in developing countries.

Launching a Turbidity Mill is as simple as launching a boat. Model 1015/6P is being launched directly into a turbid water body from its custom built trailer.

Model 1015/6P - Water based.

Primary Applications
Turbidity and suspended solid reduction, colour removal, dispensing biological or adsorptive media, nutrient control, blue green algae management, bacterial control and odour management.

Secondary Applications
Acid neutralisation, pH correction, toxic metal reduction, lowering total dissolved solids.

Sales, contract treatment, lease | Case studies

C. HALT System

Key benefits
• Efficiently grinds low-cost limestone aggregate into slurry allowing rapid dissolution.
• Can replace anoxic limestone drains.
• Long term treatment solutions using limestone = long term cost and resource savings.

General Description
The HALT Water Treatment System is a limestone aggregate(e.g.<40mm) grinding system that is currently undergoing commercialisation. Field trials consistently produced a fine grained (<500 micron) limestone slurry which is an effective means for treating acid water. This system has a small site footprint and low physical impact when deployed. It requires minimal existing infrastructure and can be readily powered by water turbine.

This semi-passive water powered system has the potential to replace the often problematic anoxic limestone drains as a long term solution to many acid drainage problems. The HALT Water Treatment System has the advantage of utilising the more ecologically benign effects of limestone as a treatment reagent in environmentally sensitive areas. Using limestone aggregate also significantly reduces the reagent costs of water treatment where long term treatment is required.

The HALT System (Model 0710/1515) shown here is dispensing a limestone slurry into an acidic stream at an old abandoned mineral field.

Model 0710/1515 - Land based.

Primary Applications
Acid neutralisation, pH control, toxic metal reduction.

Sales, contract treatment, lease | Case studies

D. Storage and delivery systems

Key benefits
• Designed to easily integrate with Earth Systems' treatment systems
• Easily transported from site to site.
• Portable treatment system = reduced capital costs.

General Description
The off-the-shelf storage and delivery system are purpose-built systems that are easily transported and are designed to readily integrate with our water treatment systems. The storage and delivery systems provide a simple means to increase the level of automation, and if desired, decrease the amount of human input and reduces the potential for human error.

Model 15TM5/5 - Portable system.

General Description
The 15TM5/5 is a weather-resistant reagent storage and delivery system with a storage capacity of 3 m³. It is designed to be easily operated at sites that do not have complex materials handling capabilities or highly skilled labour. Dry reagent is loaded into the storage hopper through the loading hatch located on the top of the hopper, either via bulker bags (0.5-1 tonne) or small (20-25 kg) bags. The reagent is dispensed from the base of the hopper at an adjustable rate, via a screw auger or belt conveyer, to the receiving unit (see also Integrated System IS-5).

The 15TM5-5 is designed to readily fit into a shipping container and requires limited assembly once on site. The system can usually be relocated within a site to suit changed conditions, without the need for disassembly.

Primary Applications
Storing hydrated lime, quicklime, alum and dispensing at an adjustable rate to an appropriate water treatment system

Sales, contract treatment, lease | Case studies

CUSTOM-BUILT INTEGRATED TREATMENT SYSTEM

Many water treatment requirements are typically application-specific. Earth Systems can design and construct an integrated treatment system to suit your specific site requirements. An integrated treatment system generally consists of three main components:
• Reagent storage and delivery - options range from 1 tonne bulker bag dispensing systems with portable augers to 20 tonne storage silos with auger or belt feed systems.
• Chemical mixing and dispensing - component designed for your output and reagent requirements.
• Control and monitoring - options from manual on/off to radio telemetry SCADA control systems.

We develop your actual site treatment requirements onsite with you. This ensures that the treatment plant is integrated with your site operations and accounts for the chemistry of your water.

Applications
Acid neutralisation, pH control, toxic metal reduction, turbidity and suspended solid reduction, dispensing biological or adsorptive media, nutrient control, blue green algae management, odour control

Routine treatment of acidic stormwater runoff in South Africa. An integrated treatment system consisting of electronic on/off control, 20 tonne storage silo, three phase electric screw auger, Neutra-Mill mixing and dispensing system.

Optional Specifications

General Description
The IS-5 is an integrated treatment plant that combines a reagent storage and delivery system (15TM5/5) with an off-the-shelf treatment system (0710/1717). An interlocked, automated control system seamlessly links these two units so that maximum control is given to the operator.

The IS-5 facilitates the automated mixing of dry reagent to produce a concentrated solution or slurry, which can be dispensed directly into the water body or stream requiring treatment. This supplants the approach of conventional systems which pump the entire water body requiring treatment through the treatment plant.

The IS-5 is designed to be easily portable and only requires minimal site preparation prior to installation. As the conditions change at a site the IS-5 can be easily relocated to accommodate changing site demands.

The IS-5 provides a simple method for conducting routine and unmanned treatment of surface waters at mine sites.

Sales, contract treatment, lease | Case studies

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