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Anaerobic digestion (AD) is one of the suitable solutions for organic waste treatment and biogas generation, so that technology has attracted international attention nowadays for its economics. This paper mainly introduces the potential of biogas production from primary sludge and crop residues. Anaerobic digestion of corchorus stalks (CS), sugarcane leaves (SL), and primary sludge (PS) were carried out, using the biochemical methane potential (BMP) tests and by using cow manure as inoculum. CS, and SL were dried at room temperature for 15 days, then they were grinded into 2-3 cm particles size. The BMP tests were performed using 500 mL digesters under mesophilic conditions. A constant ratio of 2.0 was kept between the volatile solids (VS) of inoculum and the total VS of substrates. Evaluation characterizations of used feedstock followed the APHA standard methods. The results showed that the cumulative biogas yields (CBYs) from anaerobic digestion of CS, SL and PS were 53.33, 74.67 and 50.67 mL /g VS-added, respectively. Experimental results were approved using statistical analysis by ANOVA test at P-value less than 0.05. The results showed that SL is a highly eligible substrate for anaerobic digestion due to its high level of gas production and biodegradability.

Methane production from anaerobic co-digestion of primary sludge and crop residues under mesophilic condition