Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2010.2578.2583RashidR. Mohamed EsivanS.M. RadzaliS.R. IdrisA. 1220101021Artificial Neural Network (ANN) approach was applied in developing software sensor for production of lactic acid using pineapple waste from Lactobacillus delbreuckii. Lactic acid production currently is one of the significant materials in industry and production with renewable source such as pineapple waste made the production of lactic acid faced a lot of disturbances in measuring the quality of lactic acid produced. An artificial neural network (ANN) was developed to predict the concentration of lactic acid, using collected data from an offline analysis. Multi layer perceptron (MLP) was used for mapping between the input and output parameters. Two variables were used as input parameters. MSE was used to evaluate the predictive performance of MLP. Logsig and purelin was used as the activation function and Levenberg-Marquadt was utilized as the training algorithm. The result showed that having 2 inputs is better in predicting the concentration of lactic acid; instead of 1 input. The optimum structure found was 2-5-1.]]>Idris, A. and W. Suzana,2006Lactobacillus delbrueckii.]]>4111171123Araúzo-Bravo, M.J., J.M. Cano-Izquierdo, E. Gómez-Sanchez, M.J. López-Nieto, Y.A. Dimitriadis and J. López-Coronado,20041210731090Chen, L.Z.,2006154156Cheroutre-Vialette, M. and A. Lebert,200273107118Du, D., C. Wu, X. Luo and X. Zuo,20062006pp: 4245Esnoz, A., P.M. Periago, R. Conesa and A. Palop,2006Bacillus stearothermophilus.]]>106153158Fan, Y., K. Takayama, Y. Hattori and Y. Maitani,20042116921697Fogelman, K.D., E.E. Wikfors and R. Chen,20092009Fortuna, L., S. Graziani and M.G. Xibilia,200513499508Gueguim-Kana, E.B., J.K. Oloke, A. Lateef and M.G. Zebaze-Kana,2007Lactobacillus bulgaricus and Streptococcus thermophilus in yoghurt fermentation using artificial neural network and genetic algorithm.]]>34491496Herzog, M.A., T. Marwala and P.S. Heyns,200994479489John, R.P., K.M. Nampoothiri and A. Pandey,200774524534Kiviharju, K., K. Salonen, U. Moilanen and T. Eerikäinen,2008in situ measurements and software sensor.]]>35657665Li, B. and L. Li,20062006pp: 955958Lin, B., B. Recke, J.K.H. Knudsen and S.B. Jřrgensen,200731419425Marques, S., J.A.L. Santos, F.M. Gírio and J.C. Roseiro,200841210216Najafi, G., B. Ghobadian, T.F. Yusaf and H. Rahimi,20074756764Rao, C.S., R.S. Prakasham, A.B. Rao and J.S. Yadav,2008Lactobacillus delbrueckii immobilized in functionalized alginate matrices.]]>2414111415Rashid, R., H. Jamaluddin and N.A. Saidina Amin,2006207997Rivier, L.,200014147165Rashid, R.,20042004Zamprogna, E., M. Barolo and D.E. Seborg,2005153952Gonzaga, J.C.B., L.A.C. Meleiro, C. Kiang and R. Maciel Filho,20082008