Renewable Energy and Environment Laboratory, Faculty of Sciences, IbnTofail University, University campus, B.P: 133, Kenitra, Morocco.
Biotechnol Lett. 2019 Nov;41(11):1299-1307. doi: 10.1007/s10529-019-02735-w. Epub 2019 Oct 10.
The main objective of this study is the evaluation of RPPW anaerobic digestion feasibility at laboratory scale under Mesophilic condition. The experiment is conducted using a two-stage biofilm digester of 5 L capacity with mobile support material.
Anaerobic treatment of wastewater from recycled pulp and paper industry in Morocco was tested using a laboratory-scale anaerobic biofilm digester that operated under mesophilic conditions over a 70-day. Chemical oxygen demand (COD) efficiency, volatile and total solid (VS, TS) elimination of the substrate during the process were: 78%, 52% and 48% respectively. The system was stable throughout its operating cycle with an optimum pH (7.24), alkalinity (1750 mg CaCO/L) and a volatile fatty acid value (760 mg/L). The experimental daily biogas production measured reaches a value of 5 L/day with a composition of 71% methane, 27.6% carbon dioxide, 0.2 oxygen and 7713 ppm of the HS. The study results show that the anaerobic biofilm reactor is a suitable technique for recycled pulp and paper wastewater (RPPW) treatment. The reactor shows high performances in terms of process stability, removal efficiency (> 70%) and biogas production.
Anaerobic digestion is an efficient waste treatment technology that uses natural anaerobic decomposition to reduce the volume of waste while producing biogas. However, research is needed to strengthen microbial metabolism, biochemistry and the functioning of the rector to improve biogas production. The RPPW AD experiment with biofilm digester technology was stable throughout the operation period. The digester knows an overloaded in the last phase of the experiment which leads to an inhibition of biogas production.
本研究的主要目的是在中温条件下评估 RPPW 厌氧消化的可行性。该实验采用 5L 容量的两段生物膜消化器，使用可移动的支撑材料进行。
在 70 天的时间里，使用中温条件下运行的实验室规模厌氧生物膜消化器对摩洛哥回收纸浆和造纸工业废水进行了厌氧处理。在该过程中，化学需氧量（COD）效率、挥发性和总固体（VS、TS）的去除率分别为 78%、52%和 48%。该系统在整个运行周期内保持稳定，最佳 pH 值（7.24）、碱度（1750mg CaCO/L）和挥发性脂肪酸值（760mg/L）。实验中测得的每日沼气产量达到 5L/天，其组成分别为 71%甲烷、27.6%二氧化碳、0.2%氧气和 7713ppm 的 H2S。研究结果表明，厌氧生物膜反应器是一种适用于回收纸浆和造纸废水（RPPW）处理的技术。该反应器在过程稳定性、去除效率（>70%）和沼气产量方面表现出很高的性能。
厌氧消化是一种高效的废物处理技术，它利用自然的厌氧分解来减少废物的体积，同时产生沼气。然而，需要进一步的研究来加强微生物代谢、生物化学和反应器的功能，以提高沼气产量。使用生物膜消化器技术的 RPPW AD 实验在整个运行期间保持稳定。在实验的最后阶段，消化器出现了过载现象，导致沼气产量受到抑制。
