REN Shu-kui.Analysis and Improvement of Reclaimed Water Reuse Process in Nantong Economic and Technological Development Zone[J].China Water & Wastewater,2021,37(18 18):122-126.
Analysis and Improvement of Reclaimed Water Reuse Process in Nantong Economic and Technological Development Zone
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
18 18
Page:
122-126
Column:
Date of publication:
2021-09-17
- Keywords:
- wastewater reuse; ozone activated carbon biofilter; integrated membrane system; evaporative crystallization
- Abstract:
- The reclaimed water reuse project in Nantong Economic and Technological Development Zone takes the tail water treated by Nantong Plant of Jiangsu Prince Pulping Co., Ltd. as raw water. It adopts the combined process of air flotation, ozone-activated carbon, manganese sand filter, electrosorption (ES), ultrafiltration (UF), reverse osmosis (RO), eletrodialysis (ED), and evaporative crystallization, to achieve zero discharge of pulp and paper wastewater. The indexes of effluent quality are far superior to the relevant requirements of The Reuse of Urban Recycling Water—Water Quality Standard for Industrial Uses (GB/T 19923-2005). In order to solve the problems found in operation such as blockage of sludge return gap in clarifier, the technical measures such as adding annular sludge discharge pipe are adopted. The total investment of the project is 548 million yuan. Compared with the pipeline project discharged to the sea, the construction fund is saved by half and the operation cost is reduced by 30%. After completion and operation, the project can save about 15 million m3/a of water, with remarkable economic and social benefits.
Last Update:
2021-09-17