Effect of Selected Azotobacter Bacterial Strains On the @u~.;ehnlent of Cassava Waste during Solid State Fermentation

Abstract

Tile effect of tlzree dlffewtrt strazrzs ofAzotobacter bacteria In sold szlbstrate fernierztatzon on cassava zvaste zcms
er~r~llrnteTdl.z c szrbstrate urns znct~bnteda t 30"cfor 10 days after rrzoculatio~zw ztlz tlze Azotobnctcr bncterla specres.
Orze ~zorz-azoczrlateiib atcli zuas inczibated as a reference. Perceiztagcs of tlze inztzal nizdfinal prosrirrate rorlterifsz vere
nnalijsed. Tlre experzrrrent zuas carned ozit zlz quadrl~phcate.ln oculatiorz ofcassava zunste witlz species oflzotobacteu
hacf~rrsnr girrficarltly rtlcreased tlze levels of tlze crzlde puoteln content ton ineaiz (0.58 +SE) of 11.3% of tlze znztzal
vnllre. Arnoizg tlze tested speczes Azotobacter ngzlzz.~ncreased the crtrde protezn level nrost effectrvel~jf,o llowed h ~ j
Azotobacteu zlrizelarzdrr nnd 1eastforAzotobacter begerzncku, Tlze zncreased crzrde protelrl zuus srgn$cnrzily coruclntecf
(r = 0.86) iozth tlze e x f e ~ ioff ferrilerrfntzon. Tlzc ~zorl-protezrrr z~tuogerlc olzf-elzt~ ncueaseds zg~zlficantly( 12<0.25) to n
lricnrz of5.23%. zolule the totnl nztrogen follou~eds znrzlar trend. 711e I~eni~cellulosceo izterzt was lz~glrcrfoAr zotobactel.
rlg~lir1 11112 Azotobacter z~zizelaizdzzc oinpared untlz Azotobncter berjenncklz zullzle tlze llgrzrrz corzfcr~ztc ~asl ozocstfir
Azotohacter Vrrlelandzz and Azotobacter agzlii tllnn tlre control sariyle Tlie energy levrl zons ~ricrenseriI r z tlre
bnrterlrr tvented si~bstrntestl iatz the coirtuol snnrple. IC zs collclilded thnt botlz znczlhatin~rm zd hnctennl actlvrty ore
r n s t n r r u e r ~ t ~~lr~zncr ei1szi1gt1 1e potential protezn, lzcmzcellzrlose nnd energy conter-lt of cnssnvn wrzste riirvrng solrd
slrhstrntc jerrirerzfnt~o~nrr zd tlre eficacy depeizds olr tlze spcczes ofhncterznl used.