Experiments were conducted to investigate the effect of red mud (RM) dosing on granular sludge formation, biogas production and carbon dioxide reduction from palm oil mill effluent (POME) digestion. The results show that dosing RM adversely affected sludge granulation due to the formation of precipitates and hydrolyzates with poor settleability. However, at the optimal dosage (4.5 g RM/L), it could benefit granules formation and stability by improving the in extracellular polymeric substances and biogas production rate was 87.9 l g-VS_added/d at 4.5:30 mixing ratio. The ratio of 0.5:80–2.5:50 g-VS did not affect methane production and the highest methane yield average 79.9 l/g-VS added for RM:POME of 4.5:30, 14.5 higher respective to that of POME alone only. A CO₂ reduction of 89.6% was obtained at RM of 4.5:30 (r = 0.998). The chemical oxygen demand (COD) removal was 87% obtained at 30 g COD/l and 4.5:30 g-VS with growth of sp. Methanosarcina. The process evaluation was found model cone best fitted and actual production of CH₄. The evidence by low root mean square prediction error (RMSPE) showed high correlation difference (Dif. %) with predicted value and actual values. Analyses were evaluated that the POME degradation with RM utilization, substantially enhanced the hydrolysis rate (k_hyd), lag phase time h (λ) and methane production rate (R_m) of mixing ratio of RM:POME. Furthermore, the system showed solid reduction with the increased production of methane.

进行实验以研究赤泥（RM）剂量对棕榈油厂废液（POME）消化过程中颗粒污泥形成，沼气产生和二氧化碳减少的影响。结果表明，由于沉淀物和水解物的形成，沉降性差，给料RM会对污泥颗粒化产生不利影响。然而，在最佳剂量（4.5 g RM / L）下，它可以通过改善细胞外聚合物质而有利于颗粒的形成和稳定性，在4.5：30的混合比下，沼气产量为87.9 l g-VS_添加/ d。0.5：80–2.5：50 g-VS的比例不影响甲烷的产生，RM：POME的最高甲烷平均产量平均为79.9 l / g-VS，为4.5：30，分别比单独的POME高出14.5。一氧化碳₂在4.5：30的RM下获得89.6％的降低（r = 0.998）。在30 g COD / l和4.5：30 g-VS下，随着sp的增长，化学需氧量（COD）去除率为87％。甲烷菌。发现工艺评估最适合模型锥体和实际生产CH _4的过程。低均方根预测误差（RMSPE）的证据显示，其与预测值和实际值之间存在很高的相关性差异（Dif。％）。评估分析表明，利用RM进行的POME降解大大提高了水解速率（k _hyd），滞后时间h（λ）和甲烷生成速率（R _mRM：POME的混合比例）。此外，随着甲烷产量的增加，该系统显示出固体还原。