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.
(Answer #1). A vacuole is a cell organelle; is it basically a membranous bag filled with fluids. Vacuoles store water and certain materials that are water-soluble. They are present in all plant and fungi cells.They are also found in some species of bacteria and in some animal cells.In plants and fungi, vacuoles store water and some pigments, and they also provide turgor pressure to support the cells from within.acuoles store water and certain materials that are water-soluble. They are present in all plant and fungi cells. They are also found in some species of bacteria and in some animal cells. In plants and fungi, vacuoles store water and some pigments, and they also provide turgor pressure to support the cells from within.