Aghbashlo M, 2017, ENERG CONVERS MANAGE, V148, P759, DOI 10.1016/j.enconman.2017.06.038; Aghbashlo M, 2017, ENERG CONVERS MANAGE, V148, P1, DOI 10.1016/j.enconman.2017.05.048; Al-Riyami BA, 2001, APPL THERM ENG, V21, P1449, DOI 10.1016/S1359-4311(01)00028-X; Anonymous], 2007, INT FOOD AGRIBUS MAN; Anonymous], 2002, NATL RENEWABLE ENERG; Anonymous], BIOF IND STRAT REP S; Argo AM, 2013, BIOFUEL BIOPROD BIOR, V7, P282, DOI 10.1002/bbb.1391; Aspen Technology Inc, 2008, ASP PLUS ASP IC; Bailey D, 2007, ISSUES ANAL RETROFIT; Bosch Projects, 2016, BOSCH PROJ CHAINL DI; Botha T, 2006, ENERG POLICY, V34, P2654, DOI 10.1016/j.enpol.2004.12.017; Deenanath ED, 2012, J BIOMED BIOTECHNOL, DOI 10.1155/2012/416491; Demirbas MF, 2011, ENERG CONVERS MANAGE, V52, P1815, DOI 10.1016/j.enconman.2010.10.041; Department of Energy, 2014, POS PAP S AFR BIOF R; Dias MOS, 2013, FUEL PROCESS TECHNOL, V109, P84, DOI 10.1016/j.fuproc.2012.09.041; Dias MOS, 2012, BIORESOURCE TECHNOL, V103, P152, DOI 10.1016/j.biortech.2011.09.120; Dias MOS, 2009, CHEM ENG RES DES, V87, P1206, DOI 10.1016/j.cherd.2009.06.020; Ensinas AV, 2009, ENERGY, V34, P680, DOI 10.1016/j.energy.2008.06.001; EPA, 2007, BIOM CHP CAT 7; Eskom, 2017, REV APPL MULT PRIC 1; Ewing M, 2009, ENVIRON SCI POLICY, V12, P520, DOI 10.1016/j.envsci.2008.10.002; Farzad S, 2017, BIOTECHNOL BIOFUELS, V10, DOI 10.1186/s13068-017-0761-9; Gnansounou E, 2015, BIORESOURCE TECHNOL, V196, P364, DOI 10.1016/j.biortech.2015.07.072; Golecha R, 2016, BIOFUEL BIOPROD BIOR, V10, P129, DOI 10.1002/bbb.1626; Humbird D., 2011, PROCESS DESIGN EC BI; Ichem E, 2006, PINCH POINT AN SPREA; Kreutz T.G., 2008, 25 ANN INT PITTSB CO, V29; Kurian JK, 2010, BIORESOURCES, V5, P2404; Leibbrandt NH, 2011, BIOMASS BIOENERG, V35, P2117, DOI 10.1016/j.biombioe.2011.02.017; Leibbrandt N.H, 2010, THESIS; Losordo Z, 2016, BIOFUEL BIOPROD BIOR, V10, P589, DOI 10.1002/bbb.1663; Luo L, 2009, RENEW SUST ENERG REV, V13, P1613, DOI 10.1016/j.rser.2008.09.024; Macrelli S, 2014, BIOTECHNOL BIOFUELS, V7, DOI 10.1186/1754-6834-7-26; Macrelli S, 2012, BIOTECHNOL BIOFUELS, V5, DOI 10.1186/1754-6834-5-22; Mandegari MA, 2017, BIORESOURCE TECHNOL, V224, P314, DOI 10.1016/j.biortech.2016.10.074; March L., 1998, INTRO PINCH; Martín C, 2002, APPL BIOCHEM BIOTECH, V98, P699, DOI 10.1385/ABAB:98-100:1-9:699; McAloon A., 2000, DETERMINING COST PRO; Mendes A. G. P., 1999, Proceedings of the Annual Congress - South African Sugar Technologists' Association, P282; Modesto M, 2009, HEAT TRANSFER ENG, V30, P272, DOI 10.1080/01457630802380386; Naylor RL, 2011, SUSTAIN DEV, V49, P30; NERSA, 2011, NERSA CONS PAP REV R; Ngobeni M., 2016, MARKET OVERVIEW CURR; Nsaful F, 2013, ENERG CONVERS MANAGE, V74, P524, DOI 10.1016/j.enconman.2013.07.024; OGDEN JM, 1990, INT SUGAR J, V92, P131; Oliveira FMV, 2013, BIORESOURCE TECHNOL, V130, P168, DOI 10.1016/j.biortech.2012.12.030; Petersen AM, 2015, ENERG CONVERS MANAGE, V91, P292, DOI 10.1016/j.enconman.2014.12.002; Petersen AM, 2014, BIOTECHNOL BIOFUELS, V7, P1; Rajaeifar MA, 2017, RENEW SUST ENERG REV, V79, P414, DOI 10.1016/j.rser.2017.04.109; Rudolf A, 2008, BIOTECHNOL BIOENG, V99, P783, DOI 10.1002/bit.21636; SASA, 2017, S AFR SUG IND DIR; Seabra JEA, 2010, BIOMASS BIOENERG, V34, P1065, DOI 10.1016/j.biombioe.2010.01.042; Statistics South Africa, 2016, PROD PURCH IND; The World Bank, 2017, COMM MARK; United Nations, 2016, MECH KYOT PROT; Wienese A, 2004, P S AFR SUG TECHN AS