The influence of different conditioners on the aerobic composting of sewage sludge

Sewage sludge in Xi′an is used as the main materials,and herb residue,sawdust,rice straw,corn straw and wheat straw are taken as the bulking agent,which is mixed with the sewage sludge.In order to judge the influence of different conditioners aerobic composting of sewage sludge,the temperature,moisture content,pH value,organic matter and germination index are measured in the composting process.The results show that the treated group at the end of the compost has basically reached maturity.The temperatue increases highly and fastly when taking rice straw as the bulking agent,and organic matter decrement and germination index are the largest.When the sawdust acts as bulking agent,all the indicators are minimal.All in all,rice straw is the best sludge bulking agent,the herb residue,corn straw,and wheatstraw are better one,and the sawdust is the worst.