Mushroom compost may also contain pesticide residues, particularly organochlorides used against the fungus gnat. Chemicals may also have been used to treat the straw, and also to sterilise the compost. Therefore, the organic gardener must be careful regarding the sourcing of mushroom compost; if in doubt, samples can be analysed for contamination – in the UK the Department for Environment, Food & Rural Affairs (DEFRA) is able to advise regarding this issue.
Recycling spent aluminum oxide: Washington Mills has developed a process that enables it to collect spent aluminum oxide and recycle it back into the manufacturing process.(special section: resource management: SUCCESS STORY)
Oct 01, 2008; Over 150,000 tons of fused aluminum oxide is consumed annually in the U.S., and only a very small portion of that tonnage is...