EFFECTS OF IRON OXIDE PELLETS ON H2S REDUCTION IN BIOGAS PRODUCTION FRO COW MANURE. ឥទ្ធិពលនៃដែកអុកសុីសែនលើការកាត់បន្ថយអុីដ្រូសែនស៊ុលផួក្នុងផលិតកម្មជីវឧស្ម័នផលិតចេញពីលាមកគោ BUON TOEURN. បួន​ តឿន Phnom Penh RUA 2021 2021 Text XI.39P https://drive.google.com/file/d/1XhPBMh5WRgCy-bLXR1JJf1X6OVKQ0412/view?usp=sharing