DISTRIBUTION LAW AND INFLUENCING FACTORS OF SLUDGE YIELD OF WASTE PURIFICATION PLANTS IN L DISTRICT, SHENZHEN

LIU Xuhui; GAO Jingsi; YUAN Jiajia; ZHU Jia

doi:10.13205/j.hjgc.202306024

Volume 41 Issue 6

Jun. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(6): 181-186

LIU Xuhui, GAO Jingsi, YUAN Jiajia, ZHU Jia. DISTRIBUTION LAW AND INFLUENCING FACTORS OF SLUDGE YIELD OF WASTE PURIFICATION PLANTS IN L DISTRICT, SHENZHEN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 181-186. doi: 10.13205/j.hjgc.202306024

Citation:

LIU Xuhui, GAO Jingsi, YUAN Jiajia, ZHU Jia. DISTRIBUTION LAW AND INFLUENCING FACTORS OF SLUDGE YIELD OF WASTE PURIFICATION PLANTS IN L DISTRICT, SHENZHEN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 181-186. doi: 10.13205/j.hjgc.202306024

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DISTRIBUTION LAW AND INFLUENCING FACTORS OF SLUDGE YIELD OF WASTE PURIFICATION PLANTS IN L DISTRICT, SHENZHEN

doi: 10.13205/j.hjgc.202306024

1. Shenzhen Longgang Drainage Co., Ltd., Shenzhen 518000, China;
2. School of Materials and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China

Received Date: 2022-06-23
Available Online: 2023-09-02

Abstract

Abstract

The sludge yield of 12 water purification plants in L District of Shenzhen from 2016 to 2020 was investigated. The results showed that the sludge yield ranged from 0.51 to 2.66 t DS/10⁴ m³, and its average value showed an increasing trend. In most cases, upgrading the wastewater treatment process can reduce sludge yield. Influent SS and BOD₅ were positively correlated with sludge yield. The outward sludge moisture affected the sludge yield by influencing the dosage of chemicals in sludge treatment. Silo storage condition could change the weight of sludge and thus affect the sludge yield. In order to reduce the sludge yield, optimizing the wastewater treatment system, improving the influent biodegradability, reducing the dosage of chemicals and improving the silo storage conditions should be considered. It is suggested to use specific in-situ sludge reduction measures including using bypass inlet or multi-point aeration, controlling inflow suspended solids, strengthening sediment separation in the pretreatment stage, and adopting closed silos and transportation modes.
- sludge yield,
- wastewater treatment process,
- influent concentration,
- sludge moisture,
- storage condition,
- in-situ sludge reduction

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References

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