We tried using biochar in the micromus to see if would make a suitable bulking agent. Obviously char contains plenty of carbon, an essential for any good bulking agent. HOWEVER, it is also very absorbent, and soaks up pee like a sponge. This created a perfect environment for the larvae of the drain fly, which soon took on plague proportions in the vestibule. Unlike most flies, drain flies are quite at home in the dark and live on bio-film built up on the surfaces of anything moist, like a drain, or in this case the surface of the char or surrounding plumbing that became moisture laden as a result of the char soaking it all up. The odour didn't change or get worse, giving some cred to the ability of the char to remediate odours, or perhaps just kept the pH low, and thereby stopped the ammonia from volatilising.
Bio char doesn't work
Wed, 09/08/2010 - 10:42 — Compost Stu