Application Methods

Different Applications have different problems and require different solutions. PET has a number of engineering solutions to suit different conditions.

The following provides information on the various application methods used to apply Phoslock to waterbodies.

The selection of equipment depends on the type of waterbody, access and overall Phoslock dose strategy.

Shore based application using one of 3 compact mixing system types

  1. Farm size, very small applications
  2. Medium size – MD-2 machine <5 tonnes
  3. Large – MD-1 machine

Pontoon workboat – NATO type steel pontoons

NATO steel pontoons used for large projects. Large load rating with multiple pontoon sections able to be connected, fast assembly.

Multihull workboat – aluminum fabricated workboat 

Self propelled pontoon workboat complete with hydraulic crane for handling bulk bags. Certified survey vessel.

Pontoon workboat – using modular Jetfloat, Candock, P & D pontoons

Versatile, modular pontoon floats with 9.9 HP outboard for propulsion. 25 kg bags or 1050 kg. Multiple units attached for larger payload. Multiple floats can be connected to increase payload capacity. 


Bulk Loading Methods 

All terrain forklifts (telehandlers) and cranes are usual methods for handling pallets and bulk bags at site.


Airboat application systems – unique delivery system as developed for large shallow waterbodies

Novel method of Phoslock slurry application to broad area, shallow waterbodies such as wetland areas in Florida where outboard driven workboats are impractical. Individual airboat payload capacity is quite low but this is compensated by rapid application and fast return to base for re-load. 

Dynamic Dosing – method of shore based continuous dosing of flowing streams and canals

Dynamic (continuous) on-demand Phoslock dosing of flowing water to bind phosphate. Containerized turnkey systems available and engineered to local requirements.


Direct injection – Phoslock slurry delivered directly to sediments via drop pipe system

Direct Injection of Phoslock is used where maximum and complete delivery of Phoslock is required for sediment treatment.

The drop pipes are PE construction and designed to break if snagged on underwater obstacle and prevent damage or loss to on board equipment.


Phoslock/sand mix deposition and capping of sediment

A novel method of blending Phoslock and sand can be used as a weighting and capping treatment of some impaired sediment.

Dry Phoslock application – granules are dispersed over surface of waterbody for deep lake treatments

Phoslock applied as dry granule to lake where its desirable for the Phoslock to sink to depth before dispersing. The system utilizes a modified agricultural fertilizer spreader. Some dust is generated due to attrition and coating of the granule to impart slow release properties is beneficial.


SQUID – remote controlled applicator for hazardous sites

Remote controlled application head on floats. Applies PHOSLOCK through two head system like a lawn sprinkler. Throw distance is  radius 10 to 15 meters and can be attached to floating hose up to 200 meters

Ideal for hazardous waterbodies where access is restricted


GPS Tracking and Mapping

GPS tracking using dedicated systems can be overlaid to satellite images for project application recording.