MU Yu lin,SHI Hong tao,ZHAO Bo wen,et al.Pollution Load of Nitrogen and Phosphorus from Cage Aquaculture in Yangcheng Lake[J].China Water & Wastewater,2018,34(21):86-91.
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Pollution Load of Nitrogen and Phosphorus from Cage Aquaculture in Yangcheng Lake

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第34卷 Number: 21 Page: 86-91 Column: Date of publication: 2018-10-20
Article number:
1000-4602(2018)21-0086-06
Author(s):
MU Yu lin; SHI Hong tao; ZHAO Bo wen; SUN Cheng xing; GAO Yue shu; ZHANG Zhen jia; LI Chun jie
(School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
Keywords:
pollution load; ecological dam; cage aquaculture; sediment; nitrogen; phosphorus
CLC:
TU992.3
Document code:
C
Abstract:
A pollution load calculation method was constructed by taking a farm (aquaculture area of 6 667 m2) as the research object, and the nitrogen and phosphorus loads generated in a breeding cycle were investigated by means of the sediment releasing test and crab feeding metabolism test. The results showed that TN was released at a rate of 3.17 mg/(m2·d) in the form of NO-3-N, while the releasing rate of TP was 0.12 mg/(m2·d) in the form of soluble total phosphorous. Feeding metabolism tests showed that the maximum daily productions of TN and TP per unit mass of crabs were 35.22 mg/(kg·d) and 3.40 mg/(kg·d), respectively. The nitrogen excreted into water was mainly from the liquid excrement in the form of NH+4-N; while most of the released phosphorus was in the form of insoluble phosphorus from solid suspended waste. It was also estimated that the residues of corn, hairtail and snail were 59.6%, 61.1% and 13.2% of the initial feeding amount, respectively. During a crab breeding cycle, the maximum TN and TP loads produced by the crab aquaculture were 68.29 mg/(m2·d) and 7.05 mg/(m2·d), respectively, in which the contribution of feed residue was the largest (79.90% and 83.83%, respectively), followed by the contribution of crab excretion, which were 15.47% and 14.47%, respectively, while the contribution of sediment discharge was the smallest, which were 4.63% and 1.70%, respectively.

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Memo

基金项目：国家自然科学基金资助项目(51378305)
通信作者：李春杰E-mail:cjli@sjtu.edu.cn
作者简介： 穆玉林（1992-），男，陕西咸阳人，硕士研究生，主要从事水污染控制与资源化研究。
E-mail:muboyuan@163.com
收稿日期：2018-05-11

Last Update: 2018-11-01