The purpose of this study was to investigate the net energy potential of single stage mesophilic reactor and two phase mesophilic reactor (hydrogeniser followed by methaniser) using the mix of process industrial food waste (IFW) and sewage sludge (SS). Two-phase reactor efficiency was analysed based on individual optimum influent/environmental (C:N and pH) and reactor/engineering (HRT and OLR) conditions achieved using the batch and continuous reactor study for the hydrogen and methane. Optimum C:N 20 and pH 5.5±0.5 was observed using the Bio-H2 potential (BHP) and C:N 15 and pH 6.5±0.3 for the biochemical methane potential (BMP) test. The maximum hydrogen content of 47% (v/v) was achieved using OLR 6 g VS/L/d and HRT of 5 days. Increase in hydrogen yield was noticed with consistent decrease in OLR. The volatile solids (VS) removal and hydrogen yield was observed in range 41.3 to 47% and 112.3 to 146.7 mL/ gVS_(removed) The specific hydrogen production rate improved at low OLR, 0.2 to 0.4 L/(L.d) using OLR 7.1 and 6 g VS/L/d respectively was well corroborated comparable to previous reported results at OLR 6 gVS/L/d using the enriched carbohydrate waste stream in particular to food wastes. A significant increase in VFA concentrations were noticed shifting OLR higher from 6 g VS/L/d thereby unbalancing the reactor pH and the biogas yield respectively. In similar, maximum methane content of 70% (v/v) was achieved using OLR of 3.3 gVS/L/d and HRT of 10 days. Slight decrease in methane content was noticed thereby increasing HRT to 12 and 15 days respectively. The volatile solids (VS) removal and specific methane production rate was observed in range 57.6 to 68.7 and 0.22 to 1.19 L/(L.d). The specific methane production potential improved thereby reducing the HRT and optimium yield was recorded as 476.6 mL/gVS_(removed) using OLR 3.3 gVS/L/d. The energy potential of optimum condition in single stage hydorgeniser is 2.27 MW/tonne VS_(fed) Using the two phase and sub optimal conditions improves the energy potential to 8.27 MW/tonne VSfed with VS(removal) efficiency as 80.7% in total 15 days of HRT. The net energy balance results indicated the co-digestion of IFW with waste products of SS treatment plant viz. primary sludge (PS) and waste activated sludge (WAS) are amenable substrates for the two-stage anaerobic bio-hydrogen and bio-methane digestion process.
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机译：本研究的目的是研究单阶段嗜渗反应器的净能量电位和使用过程工业食品废物（IFW）和污水污泥（SS）的混合物，进行单级嗜渗醇反应器和两个相嗜合反应器（氢化机）和氢化器）。基于各自的最佳进水/环境（C：N和PH）和反应器/工程（HRT和OLR）条件分析了两相反应器效率，所述反应器/工程（HRT和OLR）条件用于氢和甲烷的连续反应器研究。使用Bio-H2电位（BHP）和C：N 15和pH6.5±0.3，观察到最佳C：N 20和pH 5.5±0.5，用于生化甲烷电位（BMP）测试。使用OLR 6g Vs / L / D和5天的HRT实现47％（v / v）的最大氢含量。氢产率的增加被注意到OLR一致减少。观察到挥发性固体（Vs）除去和氢产率在41.3-47％和112.3至146.7ml / gvs_（除去）使用OLR 7.1的低OLR，0.2至0.4L /（LD）的特定氢气产生率。分别与先前报道的氧化碳水化合物废物流有良好的证实良好的证实，其尤其是富含富含碳水化合物的碳水废水。 VFA浓度的显着增加被注意到从6g vs / L / d升高，从而不平衡反应器pH和沼气产量。在70％的相似性，最大的甲烷含量（体积/体积）中的溶液用10天3.3 GVS / L / d的OLR和HRT达到。注意到甲烷含量的轻微降低，从而分别增加HRT至12和15天。在57.6至68.7和0.22至1.19L /（L.D）的范围内观察到挥发性固体（Vs）除去和特定的甲烷生产速率。使用OLR 3.3 GVS / L / D将特定的甲烷产生电位降低为476.6ml / gvs_（除去）。单阶HydeRenisemer中最佳状况的能量潜力是2.27mW /吨的VS_（FED），使用两相，副最优条件将能源电位改善为8.27mW /吨的能量潜力为8.27 mW /吨，总共15天内为80.7％ HRT。净能量平衡结果表明IFW与SS治疗厂VIZ废物的共消化。初级污泥（PS）和废物活性污泥（AS）是用于两级厌氧生物氢和生物 - 甲烷消化方法的可均可底物。
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