- Application of waste treatment technology to products biogas to generate electricity and fertilizers for agricultural development
- Building the electricity generation models base on the biogas and using anaerobic sludge to produce fertilizers suitable for the conditions of Dak Lak and the Central Highlands provinces.

- Theorerical results:
+ Based on the survey of current use of the sludge and biogas in the Central Highlands, the research team calculated, designed and built anaerobic sludge decomposition model to recover biogas, electricity generation with a scale of 20 kW operating continuously, automatically and bio-organic fertilizer production at the SaiGon – Central Vietnam beer Company.
+ The process of opertating, maintaining the model.
+ Set operating parameters for the HGRPB: KOH 0,01 M; ratation speed ω = 1200 rpm; gas flow rate of 2.5 liters/min; the ration of gas flow and the liquid flow QG/QL = 29. The quality of the biogas after the cleaning process is ensured in accordance with European electricity generation standards.
+ Set a technological process to produce bio-organic fertilizers from the anaerobic sludge. The quality of the Bio-organic fertilizer get the standards in Decree 108/2017/ND-CP of the Government, date 20/9/2017.
+ Conducted research testing and application of the fertilizers on a 1 hectare scale on leaf, root and fruit vegatables.
+ The process of using the bio-organic fertilizers on the leafy, root and fruit vegetables.
+ Evaluated the economic efficiency and scalbility of the model.

- Applied results:
+ The CH4 gas generated from anaerobic decomposition gets the electricity generation standard, CH4 content is 89.2%, H2S < 0.002 ppm; CO 1.6%, the electricity is connected to the power grid of company to provide the system.
+ 100 tons of fertilizer  get standards in Decree 108/2017/ND-CP of the Government, date 20/9/2017 the has been applied on leafy, root and fruit vegetables, it has a positive effect.
+ Making of 01 miniature model of the anaerobic decomposition, biogas recovery, electricity generation and bio-organic fertilizer production system.
+ Trained 02 master specialized in Environmental Engineering, supported traning 01 PhD at Academy of Science and Technology and Danang University of Science and Technology.
+ Tranied 03 staff operating the system and received training certificates.
+ Graduated internship tranining for 15 students majoring in Environmental Egineering, Da Nang University of Science and Technology.

Using of the waste sludge material at Saigon Beer – Central Joint Stock Company after the wastewater treatment process to biogas recovery, electricity generation and build the fertilizer production process. This can be considered as a closed process for local pollution treatment which accounts for 20% of the country’s agricultural area and fertilizer

- Scientific papers in referred journals (list):
+ Do Van Manh, Le Xuan Thanh Thao, Nguyen Tuan Minh, Le Minh Tuan, Luong Huu Thanh, 2019, Technology of generating electricity and fertilizers from waste for the Central Highlands, Journal of Chemical, Physical and Biological Analysis, (24), 130 – 135.
+ Tran Thi Lien, Le Xuan Thanh Thao, Nguyen Viet Thoan, Truong Thi Hoa, Le Minh Tuan, Nguyen Tuan Minh, Do Van Manh, 2019, Study on evalution of Hydrogen Sulfide and Carbon dioxide removal capacity in biogas by absorption solution Barium hydroxide, Journal of Chemical, Physical and Biological Analysis, (24), 139 – 144.
+ Do Van Manh, Le Xuan Thanh Thao, Nguyen Tuan Minh, Tran Cong Hai, Le Minh Tuan, Tran Thi Lien, 2020, Comparision of biogas cleaning efficiency by high-gravity rotating packed bed, using different absorption solution, Journal of Chemical, Physical and Biological Analysis, (25), 163 – 169.
+ Do Van Manh, Le Xuan Thanh Thao, Nguyen Tuan Minh, Le Minh Tuan, Tran Thi Lien, 2020, Study on the current status of biogas recovery and use from tapioca processing wastewater in Central Highlands, Journal of Chemical, Physical and Biological Analysis, (25), 79 - 83.
+ Vu Thuy Nga, Luong Huu Thanh, Nguyen Thi Thu, Dam Thi Huyen, Dam Trong ANh, Hua Thi Son, Nguyen Kieu Bang Tam, Do Van Manh, 2020, Study on waste sludge treatment of beer factories to produce bio-organic fertilizer, Vietnam Agricultural Science and Technology Journal (4), 120 – 126.
+ Luong Huu Thanh, Vu Thuy Nga, Dam Trong Anh, Nguyen Ngoc Quynh, Nguyen Thi Thu, Dam Thi Huyen, Hua Thi Son, Vu Tien Duc, Nguyen Tuan Minh, Do Van Manh, 2020. Study on effect of organic fertilizers from sludge after Biogas system on vegetable soil in Dak Lak, Vietnam Agricultural Science and Technology Journal (12), 60 – 64.
+ Lien Thi Tran, Tuan Minh Le, Tuan Minh Nguyen, Quoc Toan Tran, Xuan Duy Le, Minh Quan Pham, Van Tan Lam, and Manh Van Do. Simultaneous Removal Efficiency of H2S and CO2 By High Gravity Rotating Packed Bed: Experiments and Simulation, Open Chemistry, 19: 288-298 (https://doi.org/10.1515/chem-2020-0187)
+ Chapter 10: Manh Van Do, Bui Quang Minh, Quoc Toan Tran. Assisted Pretreatment Agents Enhancing Yield of Organic Degradation and Biogas Recovery. Book Publisher International. Vol 2. DOI: 10.9734/bpi/nicst/v2. (Book: New Ideas Concerning Science and Technology).

- Patents (list):
+ Certificate of utility models No. 2538 for “Organic sludge treatment process for biogas production and bio-organic fertilizers” according to No.177742w/QD-SHTT dated 13/11/2020 of Intellectual Property Office of Vietnam.
+ Decision of Acceptance of the Paten Application for: “Biogas cleaning equipment and biogas cleaning systems include this equipment”, application No. 1-202003676 according to Decision No. 9530w/QD-SHTT dated 10/07/2020 of  Intellectual Property Office of Vietnam.
+ Decision of Acceptance of utility models for: “Biogas cleaning process with high-gravity rotating packed bed HGRPB with KOH solution”, application No. 2-2018-00409 according to No. 12901/QĐ-SHTT of Intellectual Property Office of Vietnam
- Technological products (describe in details: technical characteristics, place):
+ Model system of anaerobic sludge decomposition to recover biogas, electricity generation 20 kW, opertating continuously and automatically, located at Saigon-Central Beer Company.
+ Bio-organic fertilizer production model get the standards in Decree 108/2017/ND-CP of the Government, date 20/9/2017.
+ 100 tons of bio-organic fertilizers get the standards Section 3, Appendix V, Decree 108/2017/ND-CP, 20/9/2017 of the Government.
+ Publishing books:
•    Do Van Manh, Trinh Van Tuyen, Do Tuan Anh, Le Minh Tuan, Tran Thi Lien, Nguyen Tuan Minh, Anaerobic treatment technology, 2018, Publisher Natural Science and Technology.
•    Do Van Manh, Trinh Van Tuyen, Le Xuan Thanh Thao, Le Minh Tuan, Tran Thi  Lien, Nguyen Tuan Minh, Sludge pre-treatment technique, anaerobic decomposition, biogas cleaning and electricity genertion, 2018, Publisher Natural Science and Technology.
•    Decision to recognize books for training at Faculty of Environmental Technology, Academy of Science and Technology No. 520/QD-HVKHCN

- Other products:
+ Award: The Hitachi Global Foundation Asia Innovation Award 2020
+ Techdemo 2019 event

Saigon- Central Beer Join Stock Company at 01 Nguyen Van Linh, Tan An Ward, Buon Ma Thuot City, Dak Lak Province.

Proposing to the Vietnam Academy of Science and Technology to soon create conditions to put these scientific results into practice.