Abstract

• In the present work, biosolids were prepared from municipal sewage sludges. Municipal sewage sludge was treated to form biosolids by processes such as dewatering, sludge pasteurization, anaerobic digestion, aerobic digestion, composting, and storage. The different sewage sludge fertilizers, S1 and S2 were prepared. S1 contained only biosolid and S2 contained in the weight ratios of (1:1:1) of biosolid, rice husk ash and cocopeat. And then, some physicochemical properties and micro-macro nutrients of biosolids fertilizers were qualitatively and quantitatively characterized by EDXRF, AAS methods, and other conventional methods. By using biosolids fertilizer, a field experiment was conducted to test with mung beans. These mung bean seeds were collected from Yezin Agricultural University, Pyinmana Township, Naypyidaw. The field experiment was laid out using a randomized complete block design (RCBD), with six treatments (T1-T6). Physicochemical parameters and micro-macro nutrients of soil samples before sowing and after harvesting were analyzed. The results from the study indicated that the prepared biosolid fertilizers can effectively reduce the use of chemical fertilizers for the growth and production of mung beans. To know the presence of beneficial or non–beneficial microbes in biosolids, microbial tests were studied by total plate count methods.