Field‐scale monitoring test of aeration for enhancing biodegradation in an old landfill in China

Abstract

The field-scale test of aeration to accelerate biodegradation of the waste was conducted, which was selected in an old landfill in Hubei province in China. The long-term monitoring was presented, lasted for 11 months, to estimate the degradation stability of the landfill. The monitoring parameters included the temperature, COD and BOD of leachate, gas concentration, water level, settlement, and cellulose/lignin. The results show that the waste degradation rate was increased under the aeration condition, while there was a trend of the stability in the whole waste body. The water level within the landfill was adjusted by discharge measurements, contributing to the buildup of the oxygen environment in landfill. The C/L could be used to assess the stability of the full-scale waste during the degradation process. But, there was obviously discrete by means of drilled sampling. The field-scale test was needed to provide the evidence for aeration engineering operation.

The viability of design and operation of the air injection well for improvement In Situ repair capacity in landfill

“…For example, when the temperature increases by more than 708C, the aeration system must be stopped to prevent explosion. This similar case happened in the Konstanz Dorfweiher Landfill in Germany and in the Yiling Landfill in China [18,23]. Gas concentration monitoring before restoration or end repair helps describe the effect of increased degradation.…”

“…When the air injection rate is high, the amplitude of rising temperature will increase. Air injection should be stopped to ensure landfill security when the temperature is higher than the critical 70°C . The injection rate is selected at a higher degree in major laboratory tests.…”

“…Owing to the difference in compaction density and water content at different depths, landfill permeability decreases with an increase in depth. To ensure that the injected air achieves the same cover effect at different depths, an air injection well is composed of different cluster wells . Each cluster well includes several single wells, and each has a valve at the well exit to control flow (or air injection pressure).…”

“…Many scholars have conducted considerable research on the feasibility of aeration accelerating waste degradation, which is verified by small and medium laboratory-scale tests [5][6][7][8][9][10][11][12][13]. However, relatively few studies on the full-scale application of air injection to accelerate landfill waste degradation have been reported, and methodology and regulation of air injection systems are lacking [14][15][16][17][18]. The key in determining the repair effect of landfill is the design rationality of air injection well.…”

The Impact of Exogenous Aerobic Bacteria on Sustainable Methane Production Associated with Municipal Solid Waste Biodegradation: Revealed by High-Throughput Sequencing

“…According to the world bank, the growth rate of MSW generation is much greater than the rate of urbanization, and MSW production has risen tenfold in the past century [5,6]. Hence, researchers have focused on how to accelerate biodegradation at the landfill sites to combat the crisis we face [7][8][9][10]. Some studies indicate that physical and chemical treatments could influence biodegradation and methane production of MSW [11][12][13], while others suggest that bacteria plays a crucial role in MSW biodegradation [14].…”