NGHIÊN CỨU PHÁT TRIỂN SINH KHỐI VI TẢO SPIRULINA SP. TRONG MÔI TRƯỜNG NƯỚC MƯA VÀ NƯỚC BIỂN KẾT HỢP XỬ LÝ CO2

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Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2020

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Nước biển và nước mưa là hai nguồn nước dồi dào ở Việt Nam. Tảo Spirulina phát triển mạnhtrong môi trường giàu bicarbonat và cần rất nhiều nước để sinh trưởng. Hơn nữa chủng tảo này cókhả năng chuyển hóa CO2 cao gấp 10 lần so với thực vật và tạo ra sinh khối rất giàu dinh dưỡngnhư: protein, carbohydrate, lipids. Vì vậy kết hợp nuôi tảo Spirulina trong nước biển và nước mưakết hợp xử lý CO2, một khí gây hiệu ứng nhà kính mang lại một ý nghĩa môi trường bền vững, đồngthời sản xuất sinh khối tảo giàu dinh dưỡng ứng dụng cho nhiều ngành công nghiệp khác. Kết quảnghiên cứu cho thấy, vi tảo Spirulina SP2 và Spirulina SP4 phát triển rất tốt trong môi trường nướcmưa, tuy nhiên nước biển tự nhiên có độ mặn quá cao nên SP2 và SP4 sinh trưởng tốt từ nước biểnpha loãng hai lần. Bổ sung dinh dưỡng cho hai môi trường nuôi dẫn đến tăng tốc độ sinh trưởngcủa hai loại tảo, đồng thời tăng khả năng xử lý CO2 lên khoảng 50 lần. Sinh khối sản xuất bởi SP2 vàSP4 trong hai môi trường nuôi đều giàu đạm, với trên 70% hàm lượng protein, chứng minh tiềmnăng to lớn của việc ứng dụng SP2 và SP4 trong xử lý khí thải CO2 công nghiệp và sản xuất sinh khốigiàu dinh dưỡng.Seawater and rainwater are two abundant water sources in Vietnam. Sprirulina thrives in theenvironment rich in bicarbonate and needs a lot of water to grow. Furthermore, this algae is capableof converting CO2 with a rate of ten folds higher than plants and produces highly nutrious biomasscontaining proteins, carbohydrates, and lipids. Thus coupling production of Spirulina in seawater andrainwater with treatment of CO2, a greenhouse gas contributes a sustainable environmentalsignificance, at the same time producing algae rich biomass applied for many other industries. Theresults of the research showed that Spirulina SP2 and Spirulina SP4 grew very well in the rain watermedium, however SP2 and SP4 only grew from two-times dilution seawater due to its high salinity.Nutritional supplements for two media leaded to increased growth of the two algal strains andincreased CO2 removal efficiency of appromimately 50 folds. Biomass produced by SP2 and SP4 in thetwo media are rich in protein, with content of over 70%, proving enormous potential of the SP2 andSP4 in applications for fixation of industrial CO2 emissions and production of nutrient-rich biomass.

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