Sludge treatment, reuse and disposal. Sludge is produced from the treatment of wastewater in on-site (e.g. septic tank) and off-site (e.g. activated sludge) systems. This is inherently so because a primary aim of wastewater treatment is removing solids from the wastewater.
The central vacuole is a cellular organelle found in plant cells. It is often the largest organelle in the cell. It is surrounded by a membrane and functions to hold materials and wastes. It also functions to maintain the proper pressure within the plant cells to provide structure and support for the growing plant.
Quick look: A vacuole is a membrane-enclosed fluid filled sac found in the cells of plants including fungi. Vacuoles can be large organelles occupying between 30% and 90% of a cell by volume. Vacuoles appear to have three main functions, they:uick look: A vacuole is a membrane-enclosed fluid filled sac found in the cells of plants including fungi. Vacuoles can be large organelles occupying between 30% and 90% of a cell by volume. Vacuoles appear to have three main functions, they: