Mechanical cleaning water

In the factory processes the sticklac is first passed through crushing rollers and sieved. The lac passes through the sieve but retains the bulk of the woody matter. The sieved lac is then washed by a stream of water and dried by a current of hot air. A second mechanical cleaning process removes small sticks which have not been removed in the earlier roller process. The product, seedlac, now contains 3-8% of impurities. 

NOTE The view that deposition is an indicator of more widespread problems is also common to cooling water systems. As a result of the complex nature of deposits, their removal by acid or mechanical cleaning of boiler or cooling systems is not always as simple a process as may be portrayed. 

Introducing mechanical cleaning of vessels (e.g. wall wipers) and pipes (e.g. pipeline pigging) that process viscous materials and require periodic cleaning with water. 

Mechanical Cleaning. A cleaner is a hydrocydone device utilizing fluid pressure to create rotational fluid motion (20). Pulp is introduced tangentially near the top of the deaner. Contaminants denser than water such as chemically treated toner inks and sand migrate toward the outer wall of the deaner and exit in a separate (reject) stream. For most forward deaners, optimal ink removal efficiency is obtained at a pulp consistency of 0.2—0.3%. Most forward deaners deinking efficiency declines at pulp feed consistencies greater than 0.4%. However, a deaner said to be efficient at 1.2% pulp consistency has been reported (39). 

An Intimate mixture of 25g stibnite, llg iron powder or filings, 2.5g anhydrous sodium sulfate, and 0.6g charcoal is placed in a covered crucible and heated about 20 minutes with a Meker burner so that the fusion mixture softens but does not quite melt This is determined by momentarily stirring with an iron rod. The melt is allowed to cool and the crucible is broken. A mass of crude fused antimony weighing about 15g is found at the bottom this is mechanically cleaned and then washed with hot water. 

Archaeological bone samples were treated for diagenesis before sample analysis. The bone samples were first mechanically cleaned with the Patterson NC-350 dental drill equipped with a carbide burr to remove any organic matter or contaminants. The mechanical cleaning also removed the layers of cortical bone most susceptible to diagenetic contamination, as well as all traces of trabecular bone. The bone samples were then chemically cleaned in an ultrasonic bath. The samples were first sonicated in water for 30 minutes, then rinsed and sonicated in 5% acetic acid for 30 minutes, and finally rinsed and sonicated with 5% acetic acid for 5 minutes (30, 53, 55, J9).The bone samples were dried for 1 hour at approximately 80°C. Finally, the bone samples were placed in a crucible and ashed at approximately 800°C for 10 hours. 

Detergency Biodispersants exert a detergency or cleaning effect by lowering the adhesion of biofilms and other slimes to the wood or metal substrate. The applied mechanical force (water velocity) aids in the removal of the matter. 

Related Calculations. Where mechanically cleaned coarse screens are used, the cleaning mechanism typically is actuated by the buildup of headloss. Headloss is determined by measuring the water level before and after the screen. In some cases, the screen is cleaned at predetermined time intervals, as well as at a maximum head differential. 

One example that demonstrates the role of this type of Lewis acid site in surface chemistry is a study of the mechanism of water dissociation over the clean a-Al203(0001) surface by Hass and coworkers [100]. They used the BLYP functional in the CPMD code to allow the free energy of dissociation to be estimated using constrained dynamics [101]. The initial adsorption mode involves the coordination... 

Persons providing medical assistance should avoid contact with contaminated clothing. Contaminated clothing should be removed, bagged, and discarded. Exposed dermal areas should be cleaned thoroughly with soap and water. Exposed eyes should be flushed with generous amounts of clean water for at least 15 min. If necessary, use an endotracheal tube to maintain a clear airway, aspirate any secretions, and provide oxygen via mechanical ventilation. 

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