The solid flux rate describes the mass of solids passing through the clarifier in one hour and per m2 of clarifier surface. The SPA can be visualized in a diagram showing the balance between a solid concentration on the X-axis and the solid flux rate on the Y-axis. One model for proper operation and evaluation of a clarifier is called the state point analysis. The chemicals are usually added in mixing tanks with agitators, which provide a gentle stirring for even distribution of chemicals in the water. In many cases, flocculants or coagulants are applied to the wastewater before it reaches the clarification tank to make the sedimentation process more effective. In some tanks, called tube settler or lamella clarifier tanks, there are additional inclined plates or channels inside the tank to help force solids to settle out of the mixture. Fats, oil, grease and other floating substances are removed by a rotating skimmer on the water surface. In properly functioning clarifiers the overflow water looks already very clear. The clarified water instead is released over overflow weirs on the top of the clarifier. The removed sludge will either by recycled as RAS (return activated sludge) or wasted as WAS (waste activated sludge). The scraper mechanism arms rotate slowly along the clarifiers perimeter and are attached to a centrally located shaft which is powered by a drive system on the clarifier bridge. Inside the clarifier solid contaminants will settle down to the bottom of the tank where it is collected by a scraper mechanism and removed by another centrally located pipe. To slow down the incoming water its directed through a energy dissipating inlet and a feedwell. The entering wastewater is also known as the MLSS (mixed liquor suspended solids) which refers to the concentration of suspended solids from the activated sludge process. Wastewater from aeration basins is usually entering the clarifier from a centrally located pipe. The same principle is used by wastewater treatment clarifiers: Large tanks provide enough retention time to slow water down and to separate out suspended particles. Gravity forces contaminants to settle downward in the surrounding liquid whereas clarified water can be removed separately. If your working local then you can go for the perfect tune between you and your buds if you all have rx and tx synced up.Throughout history, sedimentation has served as a tried and true method for wastewater treatment. If you are the one makeing the dx call then they will tune to you and just don't tune yours to them unless like before it is just too far off to be understood, it doesn't have to be perfect when working the dx. If I hear another contact later that is off a litte then I just tune that one in and do like before. I don't touch my clarifier once I make contact with someone. Don't retune your radio unless it gets so bad you can't understand what he is saying and you can avoid the tuning dance. If you hear a station trying to make contact just tune him in the best you can and then make the call back. The 148 will slide down 2 channels +1kc and up about 1.5kc to 2kc which works out very well. Have done that with lots of contacts and works great. When it gets really jammed up on 元8 make a contact and tell contact just slide down 5kc and you can talk with no problem at all. If you have a good SSB radio like the cobra 148, washington, on uniden and want to work the DX you need to get the tx and rx in sync on your clarifier.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |