Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan.
Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, Pakistan.
J Environ Manage. 2021 Dec 15;300:113691. doi: 10.1016/j.jenvman.2021.113691. Epub 2021 Sep 13.
The current study focused on the performance of a lab scale side stream anaerobic fertilizer drawn forward osmosis (An-FDFO) setup and optimization of nutrient rich solution to achieve sustainable water reuse from high strength synthetic textile wastewater. Three fertilizer draw solutes including Mono Ammonium Phosphate (MAP), Ammonium Sulphate (SOA) and Mono Potassium Phosphate (MKP) were blended in six different ratios with total molar concentration not exceeding 1 M. Among six blended draw solutions (DS), combination with high concentration of SOA have shown highest flux and combination with high concentration of MKP have shown highest reverse solute flux, while those with high concentration of MAP remain moderate both in flux and RSF. During long term runs, SOA: MKP (0.75: 0.25 M) showed longest filtration duration of 217 h in Run 1, with highest initial flux of 8.29 LMH and minimum dilution factor to achieve final nutrients concentration fit for direct fertigation, followed by Run 3 MAP: SOA: MKP (0.2: 0.6: 0.2 M) and then Run 2 MAP: MKP (0.75: 0.25). Moreover, deterioration of mixed liquor characteristics occurs in membrane tank due to high RSF. Similarly, the same inhibitory effect of reverse salt on biogas production was also assessed through Bio-Methane Potential experiments. However, Anaerobic Continuous Stirring Tank Reactor exhibited high performance efficacy, highlighting the importance of side stream submerged configuration in forward osmosis (FO) process.
本研究关注实验室规模的侧流厌氧肥料抽取正向渗透（An-FDFO）装置的性能，并优化富营养溶液，以实现从高强度合成纺织废水中可持续的水再利用。三种肥料抽取溶质，包括磷酸一铵（MAP）、硫酸铵（SOA）和磷酸一钾（MKP），以六种不同比例混合，总摩尔浓度不超过 1 M。在六种混合抽取溶液（DS）中，高浓度 SOA 的组合表现出最高的通量，而高浓度 MKP 的组合表现出最高的反向溶质通量，而高浓度 MAP 的组合在通量和 RSF 方面均保持中等水平。在长期运行中，SOA:MKP（0.75:0.25 M）在运行 1 中表现出最长的过滤持续时间 217 h，初始通量最高为 8.29 LMH，达到适合直接施肥的最终养分浓度所需的最小稀释因子，其次是运行 3 MAP:SOA:MKP（0.2:0.6:0.2 M），然后是运行 2 MAP:MKP（0.75:0.25）。此外，由于高 RSF，膜罐中的混合液特性恶化。同样，通过生物甲烷潜能实验评估了反向盐对沼气生产的相同抑制作用。然而，厌氧连续搅拌罐反应器表现出很高的性能效率，突出了侧流淹没配置在正向渗透（FO）过程中的重要性。
