Impact of aeration conduit diameter on production of landfill gas in a semiaerobic landfill
准好氧填埋工艺中通气管径对垃圾填埋气(LFG)影响研究及空气热力学计算

Semi-aerobic landfill technology is becoming the main technology to solve the solid waste pollution problem in some middle and small cities in China because our earth resource limitation and the large amount of garbage. In this technology, the amount of air which entered into the landfill site has great impact to the generation and composition of LFG. This research set up pilot plants to simulate semi-aerobic landfill technology at Zhuozhou MSW Landfill Site. Three different diameters of aeration conduits, DN100, DN150 and DN200 have been set up connected to the leachate drainage pipe. Each concentration of gases in LFG has been monitored for 10 week continuously. The results show that the concentration and the uptrend of O2 in LFG coming from the plant with DN100 aeration conduit are much higher than it from the other two plants. In the greenhouse gas reduction field, CH4 and CO2 in this plant have been controlled more effectively. Through the aerothermodynamics calculation, we can see the amount of gas which coming from the aeration conduit of DN100, DN150 and DN200 has the proportion of 4:3:2. Since the amount of gas which entering into the drainage pipe are of the same level, the air which is transported into the landfill from the DN100 aeration conduit has the most amount than other two situations.