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Bioconversion of agricultural residual wastes into value added compost for enhancing crop productivity and improving soil health and attaining popularity among the farmers. Therefore, in the present investigation was carried out microorganisms play an important role in the recycling of agricultural wastes for compost production. Cattle dung, biogas slurry and paddy straw had 14.35, 11.85 and 15.94% total solids with organic carbon 45.66, 40.12 and 50.76%, respectively. The C/N ratio was observed 35:1 in cattle dung, 34:1 in biogas slurry and 87:1 in paddy straw. The nitrogen content was 1.04, 1.0 and 0.62%, respectively in cattle dung, biogas slurry and Paddy straw. The C/N ratio dropped from 42.38 to 27.65 and maximum amount of humic acid was observed in T7 treatment after 60 days of composting. Volatile solids ranged from 60 to 67.7% of TS in all treatments after 60 days of composting.

Chitosan is a cationic linear biopolymer that is produced by deacetylation of chitin by chitin deacetylase. This enzyme hydrolyses acetamido groups of N-acetyl glucosamine in chitin. Chitosan has immense potential especially in the field of agriculture, food and pharmaceuticals. In most of the countries, commercial exploitation of chitosan is predominantly done by conversion of chitin to chitosan by treating shellfish waste with alkali. The biological methods for extraction of chitosan were used as alternative for chemical methods. In the present study, 18 morphologically different fungal isolates, 17 bacteria and 3 actinomycete were isolated from soil and water samples. Out of these 38 strains, six isolates of fungi, two bacterial isolates and one actinomycete showed positive results by production of yellow color in the chitin agar media supplemented with p-nitroacetanilide as indicator.