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Nghiên cứu sử dụng than sinh học tổng hợp từ bã cà phê để xử lý ô nhiễm trong nước thải chăn nuôi

Bài viết trình bày bốn loại vật liệu than sinh học tổng hợp từ bã cà phê bằng quá trình nhiệt phân chậm CF1 (500 độ C/0,5 giờ); CF2 (500 độ C/1,5 giờ); CF3 (500 độ C/3 giờ); CF4 (500 độ C/6 giờ) được nghiên cứu để xử lý ô nhiễm COD và TSS trong nước thải chăn nuôi. Đặc trưng vật liệu được xác định bằng phương pháp hiển vi điện tử quét SEM và EDX. | Journal of Mining and Earth Sciences Vol. 61 Issue 5 2020 135-144 135 Using biochar from spent coffee grounds to treat pollution in livestock wastewater Huong Thu Thi Tran 1 Tong Xuan Nguyen 2 Yen Hai Thi Trinh 1 Hang Thi To 1 Huyen Thanh Thi Dang 1 Linh Thuy Thi Vu 1 Phuong Thi Nguyen 1 Thuy Thu Dinh3 1 Faculty of Environment Hanoi University of Mining and Geology Vietnam 2 Institute of Environmental Science Engineering and Management Industrial University of Ho Chi Minh City Vietnam 3 Microbiology Laboratory Quatest 1 Directorate for Standard Metrology and Quality Vietnam ARTICLE INFO ABSTRACT Article history Four types of biochar material synthesized from spent coffee grounds by Received 18th Aug. 2020 slow pyrolysis process CF1 500 C 0.5h CF2 500 C 1.5h CF3 Accepted 03rd Sept. 2020 500 C 3h CF4 500 C 6h is studied to treat two pollution parameters Available online 31st Oct. 2020 COD and TSS in livestock wastewater. Material characteristics were Keywords determined by SEM EDX and BET methods. The results showed that the 4 Biochar samples of biochar materials were structured fiber clearly the COD interplanar spacing which corresponds to the lattice plane. The C content in the biochar sample is higher than the initial raw material sample the Spent coffee grounds highest value recorded reaches 90.61 C CF2 . 100 mL of the original Treatment efficiency livestock waster water is filtered through columns with 4g of biochar CF1- TSS. CF4 during reaction times varied from 0h 1h 4h and 8h the COD treatment efficiency and adsorption content of CF4 sample is highest of 96.41 and 188 mg g after 8h and the lowest value is 76.67 and 149.5 mg g after 1h recorded in CF3 sample however the COD value after treatment is still higher from 1.2 to 1.46 times than Vietnamese standard 62 2016 MONRE - national technical regulation on the effluent of livestock. The CF3 material samples have the highest TSS treatment efficiency and adsorption content of 95.19 and 6.425 mg g after 8h and .