Mahmoud Ibrahim, Hassan Mokhles, Mostafa Aboelenin Salama, Mohamed Soliman Mohamed, Fouad Attia Hossam, Metwally Khaled A, Salem Heba M, El-Tahan Amira M, El-Saadony Mohamed T, Khalaphallah Rafat
Qena Drinking and Waste Water Treatment Company, Assiut University, Egypt.
Department of Agricultural Botany (Microbiology), Faculty of Agriculture, South Valley University, Egypt.
Saudi J Biol Sci. 2022 Apr;29(4):2969-2977. doi: 10.1016/j.sjbs.2022.01.016. Epub 2022 Jan 15.
This work aimed to co-digest various wastes to assess the best combination of all mixing ratio, also at choosing the best ratio between untreated primary sludge (UPS) singly from two sources, (South valley University (SUPS) and Abu tesht wastewater station (AUPS) and raw chicken manure (RCM) and comparing the results in either case. The co-digestions of untreated primary sludge from Abu tesht wastewater treatment stations with different levels of raw chicken manure (0:100, 10:90, 30:70, 50:50, 90:10, and 100:0) to obtain the best mixtures. Also, co-digestion of untreated primary sludge from south valley university with different levels of raw chicken manure at the same ratios, to obtain the best mixtures. Batch digestion tests were applied in 2.5 L digester with a working volume of 2.0 L. The samples in triplicates were separately loaded into the digesters locally fabricated and kept for 20 days as a retention period and diluted with the same amount of water Mesophilic under 35 °C was adopted for untreated primary sludge as well as mixtures with raw chicken manure based on total solids (TS) and volatile solid (VS) proportions. The average biogas yields from AUPS/RCM mixture obtained ranged from 8570 to 5600 ml, by the following descending order, 10: 90 > 90:10 and so on >100:0, and the average biogas yields from SUPS/RCM obtained ranged from 6330 to 5635 ml, in the order of 90: 10 > 10:90 and so on >100:0. The results showed highest biogas yield from AUPS/RCM and SUPS/RCM mixtures with mixing ratio of 10:90 and 90:10, respectively, however, the lowest biogas production detected in separate digestion of AUPS and SUPS. The results indicated that co-digestion between the sludge and raw chicken manure could increase total biogas production volume, enhance sludge treatment process, and produce eco-friendly sludge because of co-digestion process than separate processing of each feedstock.
这项工作旨在共同消化各种废物，以评估所有混合比例的最佳组合，同时也从两个来源单独选择未处理的原生污泥（UPS）的最佳比例，即南谷大学（SUPS）和阿布泰什废水处理站（AUPS），以及生鸡粪（RCM），并比较两种情况下的结果。将阿布泰什废水处理站不同水平的未处理原生污泥与不同比例的生鸡粪（0:100、10:90、30:70、50:50、90:10和100:0）进行共消化，以获得最佳混合物。同样，将南谷大学不同水平的未处理原生污泥与相同比例的生鸡粪进行共消化，以获得最佳混合物。在工作体积为2.0 L的2.5 L消化器中进行批次消化试验。将一式三份的样品分别装入本地制造的消化器中，保留20天作为停留时间，并以相同量的水稀释。根据总固体（TS）和挥发性固体（VS）比例，对未处理的原生污泥以及与生鸡粪的混合物采用35℃的中温条件。AUPS/RCM混合物的平均沼气产量范围为8570至5600毫升，按以下降序排列：10:90 > 90:10等等 > 100:0，SUPS/RCM的平均沼气产量范围为6330至5635毫升，顺序为90:10 > 10:90等等 > 100:0。结果表明，AUPS/RCM和SUPS/RCM混合物分别在混合比例为10:90和90:10时沼气产量最高，然而，在AUPS和SUPS的单独消化中检测到的沼气产量最低。结果表明，污泥与生鸡粪的共消化可以增加总沼气产量，加强污泥处理过程，并且由于共消化过程比每种原料单独处理更环保，从而产生环保型污泥。
