In municipal wastewater treatment, pump blockages remain one of the most common causes of maintenance work and operational interruptions. Many facilities receive wastewater containing stones, branches, leaves, plastics, and other coarse solids. If these materials are not removed effectively during pretreatment, they can enter pumping stations and downstream treatment units, creating recurring maintenance problems. A recent municipal wastewater project in Japan provides a practical example of how improved screening can help address these issues. The treatment plant had been experiencing frequent pump clogging and increasing maintenance costs. To improve solids removal before wastewater reached the pumping station, the facility installed a wedge wire Hydrosieve Screen as part of its pretreatment process. Unlike powered screening equipment, the Hydrosieve operates using gravity flow and a static wedge wire screening surface. This design allows wastewater to pass through while retaining l...
Industrial lubrication systems in cement plants operate under demanding conditions. Dust contamination, high oil circulation rates and continuous equipment operation can make filtration a surprisingly important part of overall maintenance. A recent cement plant application in Saudi Arabia provides an interesting example of how filtration equipment can be adapted to these conditions. The Application The project involved a 5,000 TPD cement production line and the centralized lubrication system of a heavy-duty ball mill gearbox. The lubrication system circulated approximately 1,500 L/min of ISO VG 46 gear oil. Because the gearbox depends on continuous oil circulation for lubrication and cooling, filtration performance had to be considered together with flow requirements. The Main Filtration Challenges 1. Heavy Dust Contamination Cement plants naturally generate significant amounts of dust. The Saudi project also operated in a desert environment, creating additional contamination challenge...