CARBON EMISSION CHARACTERISTICS AND REDUCTION FROM LANDFILL THROUGH FORCED AEROBIC STABILIZATION PROCESS

ZHANG Ke; LONG Jisheng; LIU Yihang; WANG Xianghui; LOU Ziyang

doi:10.13205/j.hjgc.202212003

Volume 40 Issue 12

Nov. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(12): 17-21,60

LI Haiyan, QIANG Yu, HU Yanjiao, LIU Jing, QIN Fanxin. EFFECT OF MODIFIED NANO-TIO2 ON ARSENIC SPECIES AND ENZYME ACTIVITY IN ARSENIC CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 136-142. doi: 10.13205/j.hjgc.202208019

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ZHANG Ke, LONG Jisheng, LIU Yihang, WANG Xianghui, LOU Ziyang. CARBON EMISSION CHARACTERISTICS AND REDUCTION FROM LANDFILL THROUGH FORCED AEROBIC STABILIZATION PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 17-21,60. doi: 10.13205/j.hjgc.202212003

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CARBON EMISSION CHARACTERISTICS AND REDUCTION FROM LANDFILL THROUGH FORCED AEROBIC STABILIZATION PROCESS

doi: 10.13205/j.hjgc.202212003

1. College of Environmental and Chemical Engineering, Shanghai Electric Power University, Shanghai 201306, China;
2. SUS Environment, Shanghai 201703, China;
3. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200241, China

Received Date: 2022-08-08
Available Online: 2023-03-23

Abstract

Abstract

Landfill is one of the main anthropogenic emission sources of greenhouse gases. Due to historical reasons, there are a large number of expired landfills and informal storage yards in China facing a severe problem of waste stock that needs to repair urgently. Aerobic remediation technology has been widely used because it can effectively accelerate waste stabilization, but its carbon emission characteristics in the remediation process are still not clear. Taking a large-scale landfill as the object, this paper investigated the change characteristics of landfill organic waste and secondary pollutants under different repairing states, revealed its stabilization process under aerobic repair, and calculated the effect of methane emission reduction in this process. The results showed that under the aeration and water injection of 322.34 m³/min and 25.65 m³/d respectively, by intermittent gas injection method (opening for 3 hours and stopping for 3 hours, running for 9 hours per day), the content of organic matter in garbage decreased from 47.66% to 17.86%; the proportion of methane in landfill gas decreased from 0.02%~46.48% to 4.23%, reaching the requirement that the methane concentration at the outlet of air duct was less than 5%; the concentrations of COD, ammonia nitrogen and total nitrogen in leachate decreased to 800.8 mg/L, 680.9 mg/L and 897.8 mg/L respectively; during the restoration process, the actual methane emission of the landfill was reduced from 24.57 tons to 2.47 tons, cut by 22.10 tons. At the same time, due to the acceleration of the stabilization of the landfill, its methane emission potential was reduced by 1.75 kg/t waste. In conclusion, aerobic remediation could provide important support for methane emission reduction in landfill sites.
- carbon emission reduction,
- landfill,
- aerobic repair,
- methane emission reduction

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References

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