Tài liệu, tai lieu

Energy recovery from active sludge of wastewater treatment plants - Nguyen Vo Chau Ngan
The testing of applying anaerobic digestion process as an additional step to a wastewater treatment system at aquatic product processing factories showed the following results: - The biogas yield after 30 days of treatments with sludge from fish processing factory was from 305.3 to 444.2 L/kg ODMfermented in treatment of C 95-98 and of C 85-90. ...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 912 | Lượt tải: 0
Impact assessment of the extended production responsibility implementation in Vietnam: a study on electronic waste management - Duc Quang Nguyen
In this study, 3 scenarios are developed and assessed based on the obtained benefit, which is supposed to be a major dynamic factor for the system, as summarized in Table 2. It is found that, despite of the hazardous waste, the obtained benefits from electronic appliances are almost similar in case of large home appliances excluding the desktop ...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 949 | Lượt tải: 0
Application of iron-Based adsorbent (feooh) to remove hydrogen sulfide (h2s) from biogas - Do Kha Uan
In Vietnam, there are about 17,000 pig farms with over 500 pigs and less than 0.3 percent of them have a biogas facility. Biogas production from this size is about 50,000 m3/year. Therefore, developing the biogas purification technology plays an important role in biogas market in Vietnam. In this study, iron-based adsorbent (FeOOH) were tested a...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 837 | Lượt tải: 0
Anaerobic digestion of sludge in wastewater treatment plant for energy recovery – a case study of Hanoi urban district - Thi Thuy Bui
The analysis and comparison between two scenarios of sewerage sludge management in the case of Long Bien district, Hanoi city have shown the benefits in energy aspect of mesophylic anaerobic digestion by producing a large amount of biogas. The digested sludge in the process has been post-treated for soil application or/and energy generation. The...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 873 | Lượt tải: 0
Screening of peptide receptor sequences for amitrol detection using chromatographic biopanning - Nguyen Thi Lien Thuong
Chromatographic biopanning was successfully used to screen for high affinity peptide sequences to amitrol, a hardly detected endocrine disrupting chemical. The combination of chromatographic biopanning, pH gradient washing buffer (pH 8- pH 2.2), and elution by sonication were applied during the screening. No phage was seen in washing buffer of s...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 712 | Lượt tải: 0
Removal of cod and ammonium from landfill leachate by using a modified eco - Bio – block material in anoxic-oxic system
The ability of the COD and NH4+ removal from the leachate by the modified EBB has been investigated. The input COD and NH4+ were in the ranges from 600 mg/L – 1500 mg/L and 25 mg/L – 90 mg/L, respectively, the input flow rates from phase 1 to phase 3 increased from 0.25 L/hr to 1 L/hr and HRT were 74.4 hr, 37.2 hr and 18.6 hr. The experimental r...
5 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 771 | Lượt tải: 0
Microencapsulation of gac oil in chitosan bead - Ta Thi Minh Ngoc
Quả gấc của Việt Nam chứa nhiều các hợp chất thuộc nhóm carotenoids như lycopen, betacarotene, là những hợp chất có hoạt tính sinh học cao, có tác dụng tích cực trong việc làm giảm các gốc tự do, nguyên nhân gây ung thư trong cơ thể. Tuy nhiên ứng dụng của những chất này bị hạn chế trong công nghệ thực phẩm do tính kị nước của chúng bởi phần lớn ...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 687 | Lượt tải: 0
Liclo4 catalyzed aza-Michael addition of secondary amines to α,β-unsaturated esters under a solvent-free condition - Dau Xuan Duc
In our study we did not employ primary amines to avoid double addition, which could lead to a mixture of products.At first, we examined the reaction of pyrolidine with ethyl acrylate and 10 % mole of LiClO4 at room temperature in CH2Cl2. The reaction was not complete after three days (TLC analysis). Then the reaction was carried out under solven...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 1043 | Lượt tải: 0
Separation and hplc quantitative analysis of murrayafoline a from the roots of glycosmis stenocarpa - Tran Quoc Toan
In this study, we investigated two separation methods for the isolation of the bioactive compound Murrayafoline A from the roots of the Vietnamese plant Glycosmis stenocarpa and developed an HPLC method for the determination of its contents in plant material and methanol extracts. The yield of Murrayafoline A using steam distillation method was ...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 949 | Lượt tải: 0
Contribution to results of the chemical constituents of ricinus communis - Trần Thị Hoài Vân
Repeated column chromatographies of an ethyl acetate extract of the Ricinus communis, collected in Melinh - Hanoi, four compounds were isolated. Their chemical structures were elucidated as lupeol (1), epialeuritolic acid (2), ergosterol peroxide (3), and ricinine (4) by combined analyses of their NMR spectroscopic data (including 1H, 13C, DEPT,...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 662 | Lượt tải: 0

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