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0512612069 13:27 5518273349 DOUGLAS KUNEY PAGE 68114 <br /> I <br /> , E <br /> methad for approaching this goal is to dztin or scrape <br /> wastes From several buildings into the la400n an a staggered <br /> schedule, <br /> Select a site where all buildings can utilize gravity- <br /> drainage or downhill scraping to the iagodn_ If the lagoon <br /> must be located uphill From the waste souice, a sump and - <br /> FVp CaZ be used for waste transfer. Eow-ivex, this extra <br /> expense and maintenance problem may be av6ided by advance <br /> planning. <br /> The lagoon, while a primary componentvi.snot complete <br /> waste handling sysirat. Za amorst regions a thea U. S.-, and <br /> paaticulaxly in the East, normal years will produce , e , a <br /> precipitation in excess of evaporation. therefore, without <br /> leakage or sufficient evaporation, and siAce, effluent will <br /> not be suitable for discharge into state waters, it is - <br /> necesnary to remove excel$ effluent. En h land with rs <br /> desirable infiltration characteristics, an crop production- <br /> potential should be available for irrigation to util;i:re. <br /> excess nutrient-ea niched effluent. , • ' .- <br /> .4 , <br /> An anaerobic lagoon should be sized to provide a mini" = <br /> lagoon treatment volume for the WaSte wlxfvh will be han4led. <br /> Volatile solids t'V'S) are the part of manuie that is <br /> biodag adable, so treatment volume is or inarily based on VS <br /> loading, volatile solids loading rate deOends on manure <br /> production of the poultry to be served. Volatile solids and <br /> manure production are related to several tactors, includ-ing <br /> feed ration and bird weight. Table 1 shows anaerobic lagoon <br /> design criteria based on three sources fair various climates <br /> according to bird type and weight, i <br /> FlaAAed volume should be increaued to accc►unt for sludge; F <br /> accamlation and special conditions such is water spillsga{ <br /> and =usually high use of fresh water for cleaning or <br /> flushing. The design criteria in Table Iliaccount for sludge <br /> accumulation over a projected 1S-year lag6on life. Extra .: <br /> volume must a].uo be included for waste stiWage, and to hold <br /> doff water from the highest 24-hour stoim event ,likday to <br /> occur locally once in 25 yeah according tFigure 1) . sal,, it <br /> is a good idea to divert as much surface water as possible <br /> from the lagoon. Storm data is available} from .the U. S. <br /> Weather bureau to dete mine local values for 24 -hoar, 2S- <br /> year storm events. <br /> Lagoon depth may range from +6 to 20 feet depending upon <br /> construction techniques and site conditichs. A minium <br /> water depth of G feet should always be maintained. As <br /> mentioned earliar, deeper lagoons reduce lapid temperature <br /> fluctuations, thereby providincl a more stable and favorable <br /> envirornment for methane bacteria. Deep4r lagoons also <br /> 271 <br /> i <br />