Composting urban waste in passively aerated static compost piles

Abstract

Among the composting techniques, the passively aerated windrowe method presents the advantages of simple operation and cost reduction because there is no frequent stirring. The purpose of this paperwork is to compare the methods of windrow composting and passively aerated windrowe, analyzing the following parameters: temperature, pH, C/N ratio, electrical conductivity and germination index. In order to do so, food remains and tree pruning were used to prepare 6 lines of composting pile with height of 50, 75 and 100 centimeters, in order to garantee that half of the piles were revolved (R50, R75 and R100) and the other half weren’t revelved, keeping it static (E50, E75, E100). Only the lines with 1 height were considered suitable for temperature standards in accordance to CONAMA Resolution No. 481/2017, and Normative Instruction 25/2009 of MAPA. The lack of stirring had no influence on the oxygen supply for the residues decomposition. Composting with passive aeration is an efficient alternative and reduced cost option compared to revolved lines in the urban solid waste treatment. Keywords: Composting. Organic Waste. Compost. Passive aeration. Tree Pruning. Food waste.

Keywords

• composting. organic waste. compost. passive aeration. tree pruning. food waste.