Abstract
This study aimed to assess the potential of water hyacinth (WH) in treating wastewater and its viability for co-digestion with municipal solid waste to achieve zero waste treatment by generating methane biogas. A batch flow reactor treated wastewater, evaluating nine parameters (NO3, PO4, BOD5, Turbidity, Chromium, Cadmium, Lead, Calcium, and Magnesium). The highest removal efficiencies were observed for NO3 (94.13%), PO4 (75.85%), BOD5 (100%), Turbidity (93.86%), Chromium (94.3%), Cadmium (94.93%), Lead (91.33%), Calcium (41.42%), and Magnesium (43.13%). The pH ranged from (7.82 to 7.44). Methane biogas production was examined using anaerobic digesters with varying ratios of carbon-based waste and WH, along with pH, temperature, and total solid content variations. The optimal methane biogas production ratio was found to be (1:3) for WH and solid waste at (35°C), (10%) total solids, and pH (7.5), resulting in the highest cumulative methane generation of (1039.80 mL/gm v.s). The Gompertz model accurately described methane biogas generation with a yield of (1083.088 mL/gm v.s), supported by a coefficient of determination (R2) of (0.999). The kinetics of the biodegradation process were evaluated using a first-order kinetic model. The negative value of k (-0.2364) suggests a rapid solid waste biodegradation, with a high correlation coefficient (R2) of (0.9971). In order to enhance the production of methane, numerous correlations were employed, yielding a correlation coefficient of (91.36%).
