In the present study, laboratory scale biogas production from rice husks (RH) generated from different rice mills was investigated using cow rumen fluid as a source of inoculum. The effects of various parameters such as water dilution, initial pH, heavy metals and nitrogen sources on digester performance were evaluated. Feedstock to water dilution ratio of 1:6 w/v and initial pH 7 gave the maximum biogas yield of 382 and 357 mL/day, respectively. Addition of heavy metals (Ni2+, Zn2+, and Cu2+) enhanced digester performance with Ni2+ (100 ppm) giving the best biogas yield. The maximum values of biogas production rate were 30 and 69 mL/day for the control and poultry droppings, respectively, after two days while urea gave 8 mL/day on day four. The use of poultry droppings (PD) as nitrogen supplements encouraged biogas generation. Therefore, rice husks offer an alternative source of energy to agricultural farmers.