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首页> 外文期刊>Waste management & research >Impact of volatile fatty acids to alkalinity ratio and volatile solids on biogas production under thermophilic conditions
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Impact of volatile fatty acids to alkalinity ratio and volatile solids on biogas production under thermophilic conditions

机译：嗜热条件下挥发性脂肪酸对碱土含量与碱度比的影响

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The study assessed the impact of volatile fatty acids (VFA) to total alkalinity (TA) ratio (VFA/TA), and percentage volatile solids (VS) reduction of batch and semi-continuous anaerobic co-digestion of palm nut paste waste (PNPW) and anaerobic-digested rumen waste (ADRW) on digester stability and biogas production under the environmental condition of 50 ± 1°C and hydraulic retention time of 21 days for the batch studies and 14 days for semi-continuous co-digestion. The co-digestion ratios were based on percentage digester volume corresponding to 90%∶10%, 75%∶25% and 50%∶50%. During batch and semi-continuous anaerobic co-digestion, VFA/TA of 0.32-1.0 and VS reduction of 53-67% were observed as the stable range at which biogas production was maximum. In terms of semi-continuous anaerobic digestion (AD), except for the 50%:50% ratio where biogas production progressed steadily from the first to fourteenth days, biogas production initially dropped from 180.1 to 171.3 mL between the first and third days of the 90%: 10% reaching a maximum of 184 mL on the fourteenth day. Biogas production declined from 198.8 to 187.5 mL on the second day and then increased to 198.8 ± 0.5 mL in the case of the 75%:25% with a significant difference between the treatment ratios at p < 0.05. Therefore, the study can confirm that the 50%:50% ratio (PNPW∶ADRW) is a suitable option for managing crude fat-based waste under thermophilic AD due to its potential for rapid start-up and complete biodegradation of active biomass within a 21-day period. This presupposes that residual methane as greenhouse gas will be void in the effluent if disposed of.
机译：该研究评估了挥发性脂肪酸（VFA）对总碱度（TA）比（VFA / TA）的影响，挥发性固体（VS）减少分批和半连续厌氧共同消化棕榈坚果浆料废物（PNPW） ）厌氧消化瘤胃废物（ADRW）在蒸煮器稳定性和沼气生产的环境条件下为50±1°C和液压保留时间为21天，用于分批研究和半连续共消化的14天。共消化比率基于倒数百分比对应于90％：10％，75％：25％和50％：50％的百分比。在分批和半连续的厌氧共消化期间，VFA / TA为0.32-1.0和Vs减少53-67％，作为沼气产生最大的稳定范围。就半连续的厌氧消化（AD）而言，除了从第一至第十四天稳定地进展沼气产生的50％：50％的比例，沼气产量最初在第一个和第三天之间从180.1到171.3ml下降90％：10％在第十四天达到最多184毫升。沼气产量在第二天的198.8至187.5毫升下降，然后在75％的情况下增加至198.8±0.5毫升：25％，P <0.05的治疗比之间有显着差异。因此，该研究可以证实50％：50％的比例（PNPW:AdRW）是一种适用于在嗜热基础下管理基于粗脂肪的废物的合适选择，这是由于其在A内快速启动和完全生物降解的活性生物量的潜力21天。这假设残留的甲烷作为温室气体的含量在出水中会在流出物中无效。

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