Nitrogen loss reduction by adding KH2PO4-K2HPO4 buffer solution during composting of sewage sludge

被引：19
|
作者：
Liang, Jiayun [1 ]
Shen, Yanwen [1 ]
Shou, Zongqi [1 ]
Yuan, Haiping [1 ]
Dai, Xiaohu [2 ]
Zhu, Nanwen [1 ,3 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[2] Tongji Univ, Coll Environm Sci & Engn, 1239 Siping Rd, Shanghai 200091, Peoples R China
[3] Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 264卷
关键词：
Composting; Nitrogen loss; Sewage sludge; Buffer solution; Struvite; VOLATILE FATTY-ACIDS; STRUVITE FORMATION; PIG MANURE; AMMONIA VOLATILIZATION; BIOCHAR AMENDMENT; GASEOUS EMISSIONS; FERRIC NITRATE; SWINE MANURE; WASTE-WATER; FOOD WASTE;
D O I：
10.1016/j.biortech.2018.05.065
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Nitrogen loss through gaseous emission, mainly ammonia emission, was an inevitable problem during sewage sludge composting. In this study, MgSO4 + K3PO4 (Run A), K2SO4 + KH2PO4-K2HPO4 (Run B) and MgSO4 + KH2PO4-K2HPO4 (Run C) were mixed with mixtures before composting, aiming at researching the effects of buffer solution on reducing nitrogen loss during composting. Ammonia loss of Run C was reduced by 53.8% and 45.5%, and nitrogen loss of Run C was decreased by 61.2% and 67.1%, compared to that of Run A and Run B, respectively. Besides, organic matter degradation of Run C was 36.8%. Among the three amended treatments, nitrogen loss in Run C was effectively reduced and organic matter degradation was slightly improved. The addition of MgSO4 and KH2PO4-K2HPO4 was confirmed to be effective to maintain a desired pH range for struvite precipitation as well as to reserve more ammonia in the compost to promote the formation of struvite.
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页码：116 / 122
页数：7
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