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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Chen, Xiaochen Fukushi, Kensuke |
| Description | Author Affiliation: Chen X ( Department of Urban Engineering, The University of Tokyo, Tokyo 113-8656, Japan. Electronic address: chenxiaochen1984@gmail.com.); Fukushi K ( Integrated Research System for Sustainability Science, The University of Tokyo, Tokyo 113-8654, Japan.) |
| Abstract | To develop a sound post-treatment process for anaerobically-digested strong wastewater, a novel natural treatment system comprising two units is put forward. The first unit, a trickling filter, provides for further reduction of biochemical oxygen demand and adjustable nitrification. The subsequent soil-plant unit aims at removing and recovering the nutrients nitrogen (N), phosphorus (P) and potassium (K). As a lab-scale feasibility study, a soil column test was conducted, in which black soil and valuable Kentucky bluegrass were integrated to treat artificial nutrient-enriched wastewater. After a long-term operation, the nitrification function was well established in the top layers, despite the need for an improved denitrification process prior to discharge. P and K were retained by the soil through distinct mechanisms. Since they either partially or totally remained in plant-available forms in the soil, indirect nutrient reuse could be achieved. As for Kentucky bluegrass, it displayed better growth status when receiving wastewater, with direct recovery of 8%, 6% and 14% of input N, P and K, respectively. Furthermore, the indispensable role of Kentucky bluegrass for better treatment performance was proved, as it enhanced the cell-specific nitrification potential of the soil nitrifying microorganisms inhabiting the rhizosphere. After further upgrade, the proposed system is expected to become a new solution for strong wastewater pollution. |
| File Format | HTM / HTML |
| ISSN | 10010742 |
| Journal | Journal of Environmental Sciences |
| Volume Number | 41 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-03-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Health |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Medicine Environmental Engineering |
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