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.
A vacuole stores water, food, and enzymes, and collects unwanted waste. A vacuole is a sac â¦ used to store water for the cell. Plant cells have a large vacuole. Animal cells have small vacuoles, if they have one at all. A vacuole maintains the acidic internal pH and also the turgor and hydrostatic pressure in the cells.acuoles are water-filled storage spaces found in cells. They are found in both animal and plant cells (but they are more common in plant cells they are also bigger in plant cells).