Digested sludge

from Wikipedia, the free encyclopedia

Digested sludge (also called wulch ):

  • in geology and soil science a putrid subaquatic, anoxic sediment from decomposing organic substances and their decomposition products, see sapropel
  • in wastewater technology a sewage sludge stabilized by rotting, see digested sludge (wastewater technology)
  • In soil science, a nutrient-rich underwater soil in the absence of oxygen, see Gyttja
  • in the aquarium hobby a preliminary stage of the sludge, s. Muck .