Tham khảo tài liệu 'environmental technologies part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 13 The Application of Membrane Separation Processes as Environmental Friendly Methods in the Beet Sugar Production Zita Seres1 Julianna Gyura1 Mirjana Djuric1 Gyula Vatai2 Matild Eszterle3 University of Novi Sad Faculty of Technology Serbia 2Corvinus University Department of Food Engineering Hungary Research Institute of Hungarian Sugar Industry Hungary 1. Introduction The sugar industry is one of the key segments of the food industry. This industry is also well known as one of the most energy-intensive in the field of food and chemical industry. In 1999 the total quantity of produced sugar was summarized. It was reported that the production reached 16 700 000 tones while the total value of the produced sugar was 8924 million EUR. A significant quantity of thermal energy was consumed for the evaporation and beet pulp drying as well as electrical energy needed for the pumps and for driving the centrifuges. According to CEFS specific energy consumption was kWh 100 kg beet in 1998 IPPC 2003 . In a Greek study a figure of 280 kWh t is given for the electrical part of the energy consumption in sugar manufacturing IPPC 2003 . While the overall water used is about 15 m3 t sugar beet processed the consumption of fresh water is - m3 t sugar beet processed or even less in modern sugar factories. Water consumption depends on the activities of each installation . more water is consumed in an installation that extracts and refines sugar beet compared to the one that does only one of these activities IPPC 2003 . For example the consumption of water in Austria was reported at a level of m3 t of sugar beet processed which is equivalent to 9 m3 t of produced sugar IPPC 2003 . The transport water has high organic contamination due to the soil and sugar from damaged beets. Its COD is 5000 - 20000 mg L. Waste water with high BOD levels is produced in large volumes IPPC 2003 . Despite the fact that the sugar industry is one of the causes of the environmental .
