Effect of organic rice (Oryza sativa) cultivation on greenhouse gas emission

Malav, Mahesh Kumar; Prasad, S. V. Sai; Jain, Niveta; Kumar, Dinesh; Kanojiya, S

doi:10.56093/ijas.v90i9.106625

Cited by 1 publication

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References 28 publications

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“…In the A/O process, controlling the aeration rate in the aeration zone and ensuring the DO at the front end of the nitrification section were the main measures to inhibit N 2 O emissions [32][33][34]. In the established SBR treatment system, the CO 2 emission can be reduced by adjusting the control method of inlet and aeration section, increasing the frequency of inlet and aeration cycle, and reducing the aeration time under NH4 + load [35][36][37]. SBR changes the process treatment mode before and after the operation of aerobic and anoxic methods.…”

Section: Discussionmentioning

confidence: 99%

Research on Greenhouse Gas Emission Reduction Methods of SBR and Anoxic Oxic Urban Sewage Treatment System

Bai

Wen

2023

Sustainability

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With the rising awareness of environmental protection, more sewage treatment plants have been built. However, this is also one of the main sources of greenhouse gas emissions. This study carried out a series of sewage treatment experiments to analyze the factors affecting the greenhouse gas emissions of the two commonly used treatment processes in the current urban sewage treatment: the A/O and SBR methods. The experimental results showed that the total amount of greenhouse gases emitted by the A/O method was 415.63 gCO2-eq/m3, and the total amount of greenhouse gases emitted by the SBR method was 879.51 gCO2-eq/m3. The N2O emission factor in the A/O method experimental group was 0.76% of the nitrogen content in the influent. In the aerobic section, when the content of dissolved oxygen was in the range of 1.30~2.10 mg/L, and the content of dissolved oxygen was 1.90 mg/L, the minimum N2O emission factor was reduced to 0.29% of the nitrogen content of the influent. In the SBR experimental group, the ammonia oxidation rate of sewage decreased rapidly as the temperature decreased, thus affecting the discharge rate of N2O. At 25 °C, the biological enzyme activity of nitrifying bacteria was higher, thus promoting denitrification and generating more greenhouse gases. The research results provide reference for strengthening the management of sewage treatment plants and reducing greenhouse gas emissions from sewage treatment plants.

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