Washing water treatment installation


In processing companies, settling bassins are an essential part of the production process. This method allows them to recuperate a large portion of the water used for rinsing and washing their products. Settling bassins however, have some major drawbacks. They take up a lot of precious space and come with a number of environmentally damaging issues. To offer an answer for these problems we have taken a number of well-known machines, and combined them into a complete, economical and ecological washing water treatment installation. First we remove the crude organic parts from the washing water. There are many different techniques available to do this. We like to implement filter drum or static curved screen. Next we extract the sand fraction up to 63µ from the water. Usually this is done using a cyclones separator and de-watering sieves. The sand, now semi-solid, has an economic value and is ready to be reused. The washing water with the residual fraction smaller than 63µ and dissolved clay are transported to a thickening installation with slats. A binding agent of flocculant is used to concentrate and deposit the remaining fractions. To achieve an accurate measurement of the added level of flocculant an inline measuring device or DVD-meter is used. The recirculation water, which flows from the top of the thickening installation is now stripped of all solids. It is transported to the buffer storage, ready to be reused. The deposited slit is pumped into a sludge buffer tank for temporary storage. Or it is treated immediatly in a filter press or a filter pressing belt. These machines press the slit into filter cakes. During this process another part of the recirculation water is released, which can be reused in the production process. The filter cakes are solid and can be transported in their dry form.