Which bulking agents can be used in the HOTBIN?

Thursday, 7 August 2014  |  HOTBIN Composting

What is the best (recommended) bulking agent?

There are several possible materials that can be used as bulking agents. However we recommended using partially composted dry wood chip.

Bulking Agent provides Aeration in the HOTBIN

What others are available?

The table below contains a list of other possible bulking agents and an assessment of their relative merits. Note: scored 1-5, 5 being highest and good, except on cost, where reversed 1 = high cost, undesirable)

Bulking Agent

Performance

Cost

Availability

Partially composted wood chip (dry, not damp)

5

4

5

Fresh wood chip

4

4

5

Shredded garden pruning

4

5

4

Crushed charcoal (BBQ wood – new, unused)

5

3

4

Wood bark (dry not damp)

4

2

4

For information on bulking agent to waste ratios view how much bulking agent is required?