THE PROPERTY OF URINE IN COLLECTION AND STORAGE PROCESS FOR RESOURCE UTILIZATION OF URINE

TIAN Shi-yu; KUAI Xing-yu; HUANG Tao; MAO Yun-feng; ZHANG Yue-qing; WU De-li

doi:10.13205/j.hjgc.202102011

Volume 39 Issue 2

Jul. 2021

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TIAN Shi-yu, KUAI Xing-yu, HUANG Tao, MAO Yun-feng, ZHANG Yue-qing, WU De-li. THE PROPERTY OF URINE IN COLLECTION AND STORAGE PROCESS FOR RESOURCE UTILIZATION OF URINE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 66-72. doi: 10.13205/j.hjgc.202102011

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THE PROPERTY OF URINE IN COLLECTION AND STORAGE PROCESS FOR RESOURCE UTILIZATION OF URINE

doi: 10.13205/j.hjgc.202102011

1. School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
2. Jiangsu Huahong New Energy Co., Ltd., Changzhou 213175, China;
3. Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China

Received Date: 2020-01-21
Available Online: 2021-07-19

Abstract

Abstract

Urine resource utilization is an important direction in the technology related to the rural toilet revolution. Because urine is rich in nitrogen, phosphorus, and potassium, its efficient use becoming a research hot topic. The changes of nutrient elements during urine collection and storage will be affected by a variety of environmental factors and biological activities. Based on the concept of source separated toilet, this research simulated the urine collection process, detected the changes of urine properties during collection and storage process, and measured the key indicators of three batches of fresh urine and one piece of the aged urine sealed for more than 60 days used in this experiment. Different urine had different constituent. In aged urine the ρ(TN) and ρ(TP) were 7.6 g/L and 286 mg/L respectively. The ρ(TN) and ρ(TP) of the fresh urine used in this experiment were lower than the aged urine's and were 5~7 g/L and 371~843 mg/L respectively. Dilution could not inhibit urine hydrolysis, but under high dilution factors, it had a tendency to accelerate urine hydrolysis. Temperature had a great effect on urine hydrolysis. Storage at 35℃ greatly accelerated the hydrolysis of urine. Storage at 4℃ could inhibit the hydrolysis of urine within 30 days; open and seal would not affect the hydrolysis rate of urine, but open storage for 30 days, TN content lost by more than 75% due to volatilization. The 30 days' collection and storage process of the home-type source separation toilet was simulated. It was found that after the 30 days' collection and storage period, the urine hydrolysis rate reached 82%. Combining China's rural toilet revolution with related technologies of source separated urine, we proposed that urine recycling should be combined with the characteristics of urine, regional characteristic of China and the purpose of utilization. The study could provide basic parameters and design references for the urine resource utilization of source-separated toilets.
- urine,
- source separated,
- hydrolysis,
- storage,
- resourcing

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References(28)

References

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