answer wiki. digested primary sludge is usually thickened in a gravity thickener large cylindrical concrete structure with a static bridge and central drive mechanical scrapers . thickened from say 1% solids to 7% solids. drying can be achieved on solar drying beds or in a belt filter press or in a centrifuge.
if you have natural stone paving slabs or grey concrete man-made paving slabs and the run off of the water is not a problem then you should be fine to clean your paving slabs with bleach and water. the official name for bleach is sodium hypochlorite .
gels and thickeners give you more control. but because stains tend to be thin solutions to ensure good penetration, it can be a challenge to prevent them from bleeding under the stencil or to keep the application within defined pattern lines. an easy way to conquer this problem is to use a special thickening agent or gel that improves application control and permits freehand artistry.
clarifiers and thickeners; grit treatment equipment; compact pretreatment plants; septage receiving stations; compactors; aggregate reclaimers for concrete plants; penstocks; screw separators. screw press separators; screw separator accessories; energy generation equipment. hydrodynamic screws
the decision to use a geotextile in permeable pavement should be based on the same criteria used when considering use of a geotextile for the traditional interlocking concrete pavement: 1 confinement of the base aggregate and 2 separation of the base aggregate from the subgrade soil.
the use of geotextile in permeable pavement. without geotextile, the soil will work its way into the base and weaken it. this is a slow process that happens when the soil is saturated with water or during periods of thawing. geotextile stops this process and extends the life of the base by many years.
the thickener tank is supported by massive legs. on the top of the tank there is a supporting bridge fixing a vertical lattice mixer and a stilling cylinder with an inlet pipe. the lattice mixer is driven by a gearbox with an electric drive. as a standard, the surface treatment is ensured by a multi-component coating.
most of the time, a thicker concrete patio slab is going to give you less problems in the future than a thinner one. if you had a 2 inch thick concrete patio slab on expansive soil, you can plan