The Granite™ Coir Logs are not made for use in fast currents and high waves, we recommend using our Granite™ Coir Blocks instead. The block fabric provides a finer netting, and the blocks are anchored in the ground themselves.

The Granite™ Coir Block is a coir fiber block system consisting of a densely packed elongated mattress, which is attached to a bristle coir woven fabric. The coir fabric is tightly wrapped around the 16-in tall, 9-in wide and 10-ft long coir block, and then connected on three sides leaving the other side open to fill with dirt. Each coir block has a male and female end which creates a strong and easy-to-handle connection and provides an excellent face for the soil layers.

• The hanging bag details (fabric) should be noted and it is suspended on a suitable structure / frame (eg tree, fence, brick and pole arrangement).

• The bag is typically 3 x 2,5 feet in size and a slurry sample is placed in the bag. (the sample is of typically 5 Gal of sediment that is watered down if required to replicate the condition of the sludge that will enter the bag during the project).

• The effluent from the bag is collected for evaluation to see the quality and also the time is taken to establish the rate of dewatering (this provides a guideline).

• The sludge should be checked regularly for the first few hours and then left to stand for 6-8 hour and checked again. It can then be left for a few days to evaluate how dry the sludge becomes and is suitability to be handled during the removal process.

Hanging bag tests give an indication of the dewatering characteristics of the sludge. Pressure filtration tests using the selected tube should be conducted on a small scale to establish the consolidation rates. They are typically better than the results achieved in the hanging bag test.