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05/26/2009 13:14 95182739 DOUGLAS KUNEY PAGE 06/09 .Lvio d t►ltiaCwux Lagoons w orage/1 ream t DI Livestom manim�IIVeM.1ty OT M1...Page'/ 011 til Lagoon inlets Inlets should be located now the centior of the longest side of the legoola,if possible,or at several locations In large lagoons,This allmvs the sofid9 to be diA lbuted and not allowed to accllJimulte near the fie"One discharge point per acro will amid large concentrations of solids at one paint and hap minilihhtec velars during spring warm-up.Mutmple Inlets should be fad equally from a diotributikn boss. if manure will enter the lagoon through a pipe or sewer line,the lira uld enter the lagoon bekwt the minimum pump- down level,w above the full pod levell.This prevents Ire from breaking the inlet pipe.The pipe Should extend Into the lagoon and have a minimum of 3 fed of liquid undgmeath it Ind above the liquid surface are susmPtible to freezing at the and if a mail dribbling flows are present Also,Cold air can move up the oowor firm Ino the building M a dap Ia not provid",r Iba inrata�Flow the minimum pump-down lova) are generally preferred,inlet pipes must be figidly supported. Submerged Inlets carrying trading f4ws with Madvaty high Salida cornare susceptible to plugging as solids txruu amulate or"floe whore the lagoon water backs up into the pile.Ftiquent flushing(at least once a day)eliminates this problem.Sewer lima with submergad olsoargeS,Carrying theft"into lagoons,should have a minimum of ora fbot of head above the msrdMum iaggor,levet for each 104 fest of dun.All sewer lines should be designed with oloarwuto at ao-feet Intervals. Solids exclusion--Sludge al--Agitation Badding and nbmue material well bmk down vary slowly,or net at all.ih a lagoon.It is mownmandod thio material be eroded from the lagoon Fat all possible.Nondegradable material leach to excessive sludge buildup or the formation of trusts an the Lagoon eurleoe,both of which Interfere with pumping dons. Agitation during annual pun (Figure 3)should be considered ai;a means of reducing sludge buildup.Sludge removal may be JusifRad fl Sludge levels build to a significant of taint Lagoon volume.Although a Somewhat difficult and expensive operation,regular sludge removal can extend"life of a lagoon virtually Indefinitely.Sludge Is high in P and N;therefore o large arca of land will be required for apply Several yaw accumulation 0f sludge. FYguillo 3 A pr�pet[er-type agitator can be used to resuspand settled soles(sludge)from the bottom of a Oath during pump-dawn. a� Starts-up».Management Proper tegoort design ane construdw ars fruitless if the lagoon is rrnt managed.Marry problems associated with lagoon Can be Sowed with proper management. Lagoorhs should be Mled with water to one-third to one-hell of the design vol n is before manure Is klboduoed Into the lagoon,This will ensure aufficient dfluthn Is available for the eaffibllshrnert at bacterial activity.This will also mmiRdSe StaiY up adore.Starting a lagoon In the late spring or a sAy summer moriths*M estabiish a baftriall population before cold weather and will help prevent 6=asskm odors the fbHmW ng apringi I Lagoons perforin best when they are loaded cont nuuoualy.Therefore,a;weste management system should be dewiasd that kMdS the lagoon at least weekiy,and preferably dally.Flushing sys�its prom@ ideal loading conditions for lagoons.Snug loading may produce cots, II Pumping and"gating from the lagoon Is the single most Important nrehagement item,In addition to preventing evemaw and the anoodated pollutlon"nW,pumping redwveo d• d and 3uspC MdQd 301192 8110 45110w2 roam kir the addition of dilution water through rainfall or other means.Try to iRipito when odors are apt to be least offensive, that Is,on days with low humidity of when bmeza are blowing away Qm neighboring residences. If lagoons are not pumped and diluted,salt concentrations may increasi to lefts that can inhibit bacterial ectivlly.Salt leveie In mature lagoons should 00 Monitored yearly to tenure they mrn sin at safe levels.Ellildtrlod cohductivlgi(EC)is' a cdriveniaht field measurement that Indicates salt cament.EC k+reis 10,00 mkrd itif&per Ciaritmiov ittilieato'prnbnbtti d8er9saod hriH,a bitYdup 4f eaT�e,'m+d Scion. f� F was area Oblem,take lagobn samples measure phi,ifpH is be�aw B,7 an d Fq►iii t!10"or 6aust .^•"diF soda(lye)at 1 pound per 1,000 are of lagoon surfama ora f a ilii is neutral(illi=1).Even with a no"pH of QJ to 7.2.Lha lagoon can hem excess oddrous volatile aha. I Pumping operrytiona should begin before or when the lagoon level the upper pump-dawn mark to ensure ?poen(oafaty volume)Is eveitabie t*hold the 2r year,2i-haul item(about B Mehee in RAieemirg,The Mie "A DNR guldelln"Gait for pumping the IaQW when the Wil levet macttils ole upper pump-down marls.The volume hup://extension.missouri.edu/publications/Display .aspx?P=l;(1387 1 5/21/2009