STUDY AND UPGRADE THE WASTEWATER TREATMENT SYSTEM AT BA VI DAIRY FACTORY FOLLOWING A CIRCULAR ECONOMY APPROACH

Nguyễn Văn Đức; Nguyễn Thị Thúy Hằng; Khuất Thị Hồng; Nguyễn Thị Hoa; Trần Tuấn Cường; Nguyễn Đức Hùng

doi:10.34238/tnu-jst.12662

STUDY AND UPGRADE THE WASTEWATER TREATMENT SYSTEM AT BA VI DAIRY FACTORY FOLLOWING A CIRCULAR ECONOMY APPROACH

About this article

Received: 25/04/25 Revised: 04/08/25 Published: 04/08/25

Authors

1. Nguyen Van Duc, Long Son Cement Factory, Thanh Hoa
2. Nguyen Thi Thuy Hang , 1) Institute of Physic - VAST, 2) Graduate University of Science and Technology - VAST
3. Khuat Thi Hong, 1) Institute of Physic - VAST, 2) VNU School of Interdisciplinary Sciences and Arts - Vietnam National University, Hanoi
4. Nguyen Thi Hoa, Institute of Physic - VAST
5. Tran Tuan Cuong, Hanoi Thien Y Environmental Energy Joint Stock Company
6. Nguyen Duc Hung, Thang Long Environmental Technology Consulting and Transfer Co., Ltd.

Abstract

Although the wastewater treatment plant of Ba Vi Dairy Factory with a capacity of 450 m³/day and night has been operating stably, it has approached the design limit, the receiving ditch is under pressure from many sources of discharge that have not been thoroughly treated. Thus, this study aims to evaluate the quality of wastewater after treatment and the load capacity of the receiving ditch, proposing suitable solutions such as increasing capacity, renovating the biological tank and adding filter columns for reuse. The research uses methods of collecting, analyzing, evaluating load capacity and processing data. The results show that the receiving ditch no longer meets the parameters such as NH₄⁺, total nitrogen and has organic pollution.The renovation and addition of equipment helps increase the treatment efficiency by 4-16%. Based on the usage needs, it is proposed to install a filter cluster with a capacity of 50 m³/day and night for watering plants in the first phase; then add 01 similar filter cluster for factory cleaning, boiler exhaust gas which can supply with a total volume of recycled wastewater of about 100 m³/day and night. The recycling and reuse of wastewater meets the criteria of the Law on Environmental Protection and Decree 08/2022/ND-CP. The findings of this study serve as a scientific basis for developing enhanced wastewater treatment strategies in the food industry and promoting the transition toward a circular economy model.

Keywords

Wastewater; Dairy production; Organic pollution; Recirculation; Filter column

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DOI: https://doi.org/10.34238/tnu-jst.12662

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