This company can also supply goods for free, and pay compensation if the sewage treatment is not up to standard, which will cause economic losses to double indemnity. The company's recent engineering cases include: Case 1: Domestic Sewage Treatment and Reuse The new campus of Guizhou University of Finance and Economics is a key project in Guizhou Province, which is highly valued by the people's governments of Guizhou Province, municipalities and districts. In order to ensure that the new campus of Guizhou University of Finance and Economics 20 1 1 was put into use, the sewage treatment project was effectively treated. It is decided to treat domestic sewage 1.200 tons per day. Guizhou Great Wall Environmental Protection Technology Co., Ltd. adopted "Diversion Aerated Biological Filter (CCB)" to treat the sewage in the new campus. Without increasing the project investment, the sewage treatment results reached the standard of Urban Sewage Reuse and Urban Miscellaneous Water Quality Utilization (GB/T 18920-2002) and reached the standard of Urban Sewage Reuse Case 2: Hospital Sewage Treatment and Reuse. In 2009, Guizhou Great Wall Environmental Protection Technology Co., Ltd. successfully built the first hospital sewage reuse project in Panzhihua Third People's Hospital, Sichuan Province, which accumulated valuable resources. Guizhou Great Wall Environmental Protection Technology Co., Ltd. undertook the reclaimed water reuse project in the sewage treatment of the Affiliated Hospital of Chengde Medical College in Hebei Province on the basis of summing up experience in 20 10, which was highly praised by Chengde Municipal Government, Municipal People's Congress and CPPCC. Case 3: Treatment of wastewater pollution in food industry. If it is not the three high wastewater, it is best to use the diversion biological aerated filter. Guizhou Yonghong Food Factory adopts air flotation and diversion biological aerated filter, and the treated water can be reused. The slaughterhouse of Guizhou Weining Industrial Group adopts air flotation and diversion biological aerated filter, and the treated water is discharged into natural water. The slaughterhouse in Qingzhen, Guizhou adopted air flotation+diversion biological aerated filter, and the treated water reached the first-class A standard of urban sewage treatment. Case 4: Treatment of wastewater from halogen products Another kind of wastewater from halogen products. Synergistic catalytic oxidation and diversion biological aerated filter have absolute advantages. For example, Chongqing Zhubafu Food Company produces chicken feet with pickled peppers, duck feet with pickled peppers and goose feet with pickled peppers. Due to the high oil and salt content and large pigment in wastewater, BOD is above 9500mg/l, COD is above 4800mg/l, SS is above 600mg/L, and ammonia nitrogen in SS is above 2880mg/l, which cannot be solved by single biochemical method. Finally, synergistic catalytic oxidation and directed biological aerated filter were selected, and the treated sewage reached the standard of reclaimed water. Case 5: Pickled product wastewater treatment is also pickled product wastewater, which also has absolute advantages. For example, the pickle wastewater of Chongqing Yuquan Pickle Group was first treated by anaerobic+aerobic biochemical method. Because the treatment was not up to standard, it was reformed three times, with an investment of more than 30 million yuan, and the treatment effect was not ideal. Finally, the treatment was carried out by synergistic catalytic oxidation and diversion biological aerated filter. Case 6: Pharmaceutical wastewater treatment of wastewater discharged from Zheng Guang Pharmaceutical Factory in Guizhou has the characteristics of high concentration, difficult treatment and non-biochemical. Guizhou Great Wall Environmental Protection Technology Co., Ltd. adopts synergistic catalytic oxidation and directed biological aerated filter for treatment, reaching the first-class A standard of urban sewage treatment. The biological aerated filter with synergistic catalytic oxidation diversion has complete sets of equipment in Guizhou Great Wall Environmental Protection Technology Co., Ltd. and Chongqing Chutian Environmental Protection Engineering Co., Ltd., which can be directly contacted.