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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Effects of Mixture Ratio and Hydraulic Retention Time on Single-Stage Anaerobic Co-digestion of Food Waste and Waste Activated Sludge
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Effects of Mixture Ratio and Hydraulic Retention Time on Single-Stage Anaerobic Co-digestion of Food Waste and Waste Activated Sludge

机译：混合比和水力停留时间对餐厨垃圾和垃圾活性污泥单级厌氧消化的影响

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摘要

The biochemical methane potential (BMP) test was used to evaluate the anaerobic biodegradabilities of food waste (FW), waste activated sludge (WAS), and the mixtures having the ratios of 10:90, 30:70, 50:50, 70:30, and 90:10 (FW:WAS) on a volatile solid (VS) basis. The carbonitrogen (C/N) ratio and the biodegradability of the mixtures improved from 6.16 to 14.14 and increased from 36.6 to 82.6% as the FW proportion of the mixture increased from 10 to 90%, respectively. The stability and performance of the single-stage anaerobic digester (SSAD) for the co-digestion of FW and WAS were investigated, operated at the hydraulic retention times (HRTs) of 10, 13, 16, and 20 days with five mixtures at 35°C, respectively. During all the experiments, there were no indication of failure such as low pH, insufficient alkalinity, ammonia inhibition, and the accumulation of volatile fatty acids (VFAs) in any of the digesters, and the buffer capacity was the highest in the digester fed with a feed mixture of 50:50. The optimum operating conditions of the SSAD were found to be an HRT of 13 days and a mixture of 50:50 in terms of the buffer capacity of the digester and the effluent VS concentration, the methane content of the biogas produced and the specific methane production (SMP). The VS removal efficiency, biogas production rate (GPR), and SMP in this condition achieved 56.8%, 1.24 m~3 m~(-3)d~(-1) and 0.321 m~3 CH4 kg~(-1) with an organic loading rate (OLR) of 2.43 kg VSm~(-3)d~(-1).
机译：甲烷生物化学势（BMP）测试用于评估食物垃圾（FW），废物活性污泥（WAS）和比例为10：90、30：70、50：50、70： 30和90:10（FW：WAS），以挥发性固体（VS）为基础。随着混合物的FW比例从10％增至90％，混合物的碳/氮（C / N）比和可生物降解性分别从6.16提高至14.14和从36.6提高至82.6％。研究了用于FW和WAS共消化的单级厌氧消化器（SSAD）的稳定性和性能，在35、10、13、16和20天的水力停留时间（HRT）下，在35℃下混合了五种混合物分别为℃。在所有实验中，没有任何故障迹象，例如pH低，碱度不足，氨气抑制以及任何消化池中挥发性脂肪酸（VFA）的积累，并且缓冲液的容量在加有消化池的消化池中最高50:50的混合饲料。根据消化池的缓冲能力和废水的VS浓度，产生的沼气的甲烷含量和特定的甲烷产量，SSAD的最佳运行条件是HRT为13天，且混合比为50:50 （SMP）。在此条件下，VS去除效率，沼气产生率（GPR）和SMP分别达到56.8％，1.24 m〜3 m〜（-3）d〜（-1）和0.321 m〜3 CH4 kg〜（-1）。有机负载率（OLR）为2.43 kg V​​Sm〜（-3）d〜（-1）。

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