Processing of Human Feces Using Beanstalk and Sawdust as Matrix in a Composting-Type Eco-Toilet
| Autor: | Zhi Feng Wang, Ning Liu, Xin Qian, Xiao Li Kai, Liang Min Gao, Gui Xing Ning, Gen Fa Lu, Bao Hua Sheng, Zhou Man Huang, Yan Mei |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Human feces Materials science Waste management Compost Potassium General Engineering chemistry.chemical_element Biodegradation engineering.material chemistry visual_art engineering visual_art.visual_art_medium Organic matter Food science Sawdust Organic fertilizer Feces |
| Zdroj: | Advanced Materials Research. :24-29 |
| ISSN: | 1662-8985 |
| DOI: | 10.4028/www.scientific.net/amr.156-157.24 |
| Popis: | This study aims to investigate the changing of operational parameters and waste reducing rate, as well as the possibility of using produced composts as organic fertilizer in an on-site composting-type eco-toilet filled with mixed materials of beanstalk and sawdust as reaction matrix. During the 23-week period, change of pH was divided into three phases: acid phase (6.63-7.00), alkaline phase (9.00-9.71) and stable phase (8.10-9.00). With continuous input of feces and urine, total nitrogen, total phosphorus and total potassium contents was increased to reach 4.3%, 1.06% and 2.03%, respectively. Organic matter content decreased from 95.6% to 76.2% and the total reduction rate of dry weight increased gradually from 46.93% to 92.29%. The composts could be used as organic fertilizer at suitable concentrations. The suitable concentration for cucumber, cabbage and rape growth was obtained to be at compost ratios of 1:15-1:30, 1:15-1:20 and 1:25-1:40, respectively. Microbial utilization efficiency of human feces and urine could be improved when the mixed material of beanstalk and sawdust was used as reaction matrix in an on-sit composting-type eco-toilet. The mixed materials with beanstalk and sawdust at a volume ratio of 1:1 was found to be efficient to transform human feces and urine into organic fertilizer rich in the elements of N, P and K. |
| Databáze: | OpenAIRE |
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