Sewage treatment is a crucial aspect of environmental protection projects. It requires proper planning and implementation to ensure its effectiveness. To improve the quality of sewage treatment, a treatment mode of pre-treatment, primary, secondary, and tertiary linkage is established based on the current status of sewage pollution. The joint application of various technologies is used to achieve sound sewage treatment effects. As industry technicians, it is essential to grasp the critical points of sewage treatment accurately, operate reasonably, optimize the technology, and improve its feasibility as the industry develops.Wuxi Yosun Environmental Protection Equipment Co.,Ltd
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The shallow flotation-ozone-BAF combined process was used to carry out a pilot test on the effluent from the secondary sedimentation tank after biochemical treatment to provide reference data for the actual application of the process in the later upgrading and transformation project. The influent was the effluent from the secondary sedimentation tank, and the designed water volume was 50 m3/d. The operation results showed that under the conditions of 1350 mg/L polyferric dosing, 120 mg/L decolorant dosing, and 40 mg/L ozone dosing, the average total removal rates of COD and chromaticity were 65% and 80,% respectively. All effluent indicators met the direct emission limits of the "Discharge Standard of Water Pollutants for Textile Dyeing and Finishing Industry" (GB 4287-2012).
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Nantong X Paper Co., Ltd. is located in Nantong City, Jiangsu Province. It is a papermaking company that uses recycled paper as raw material. During the production process, the daily discharge of wastewater is 8,000 to 10,000 m3. The recycled paper of the company is mainly made of waste newspapers, waste board paper and waste book and magazine paper.
