Utilization of sisal waste for biotechnological applications: biogas, organic fertilizer, mushrooms and enzymes production
| dc.contributor.author | Muthangya, Mutemi | |
| dc.date.accessioned | 2020-05-17T14:37:28Z | |
| dc.date.available | 2020-05-17T14:37:28Z | |
| dc.date.issued | 2017 | |
| dc.description | Available in print form, East Africana Collection, Dr. Wilbert Chagula Library, Class mark (THS EAF TP360.M87) | en_US |
| dc.description.abstract | Sisal fibre processing generates large proportions of both wastewater and solid residues, which are not adequately utilized and disposed off untreated, leading to environmental pollution. Through waste audit at a sisal processing factory in Kenya, it was estimated that 611,875tonnes of sisalsolidwasteand3,511,900 m3ofsisal processing wastewater are produced annually. Anaerobic co-digestionofsolidsisalwastewithcowmanure generated a normalised methane yield of 0.329 m3/kg VS (added). Pre-treatment of the sisal residues reduces the salinity of the substrate for cultivation of Pleurotus species of mushrooms with high nutritional and antioxidant profiles. The results from this study indicate a diametrical cyclic pattern of Pleurotus enzymatic activities; laccase, manganese peroxidase and lignin peroxidase activities were high in vegetative growth phases and dropped upon initiation of fruiting body formation (18.1 U/ml, 7.9 U/ml and 0.32 U/ml, respectively). The nutritive and antioxidant potential of Pleurotus indicated the mainbioactivecomponents as phenoliccompounds,ascorbicacid,β-caroteneand lycopene (350.82-830.97 mg of GAEs/g, 5.07-5.29 mg/100g, 4.24-5.07 mg/100g, 4.44-5.05 mg/100g), respectively, as well as macro elements (Ca, Mg, Na, K, and P). These results indicate a possibility of harvesting enzymes for biotechnological applications as an extra benefit from mushroom cultivation on sisal waste. The results indicate that, the liquid biogas manure increased the available N, P and K contents in soils in addition to having a significantly higher effect (P≤ 0.05) on agronomic properties than that obtained with NPK fertilization. The physicochemical and nutritive properties of leafy vegetables investigated indicated crude proteins (0.81-11.37%) and high mineral elements contents. These results indicate that consumption of the leafy vegetables under investigation would contribute greatly to reduction of nutrition-related disorders for human health and to the food security. | en_US |
| dc.identifier.citation | Muthangya, M. (2017) Utilization of sisal waste for biotechnological applications: biogas, organic fertilizer, mushrooms and enzymes production, Doctoral dissertation, University of Dar es Salaam, Dar es Salaam. | en_US |
| dc.identifier.uri | http://41.86.178.5:8080/xmlui/handle/123456789/11165 | |
| dc.language.iso | en | en_US |
| dc.publisher | University of Dar es Salaam | en_US |
| dc.subject | Agricultural waste as fuel | en_US |
| dc.subject | Waste products as fuel | en_US |
| dc.title | Utilization of sisal waste for biotechnological applications: biogas, organic fertilizer, mushrooms and enzymes production | en_US |
| dc.type | Thesis | en_US |