摘要：Co-compost can be obtained by combination of sludge and municipal solid wastes which were usedin the agricultural lands and solve municipal waste and wastewater treatment plant problems. The goalof the study was to investigate a methodology for settling optimum conditions such as aeration rate,temperature, moisture content, C/N ratio and size of particle in composting process. Two pilots wereprepared and in every pilot different combination of municipal waste, sludge and wood pulp wereused. Particle size of blend and aeration rate was the differences between two pilots. The resultsshowed that the pH of compost pile was about 10 at the beginning of process and decreased to 7.25gradually after 7 days. The proper size of particle was between 10-40 mm. The suitable C/N ratio wasbetween 25 to 35 and it was about 33 in this experiment. Higher temperatures caused increasingmicrobial activity at the beginning of process. To homogenize the temperature, it is vital to make anagitation of the compost pile every 4-6 days. Increase in co-compost temperature happened when themoisture content was between 50 and 60%. Aeration with three times of required air has given thebest result. Finally, we found that the moisture content has a greater effect on the microbial activitythan the temperature. These results support the use of co-composting process with make-up particlesize and moisture capabilities in preference to forced aeration enclosed reactors.
