Effect of Water Surface Loading and Harvesting on Purification Function by Hydroponic Biofilter Method and Evaluation of Pollution Control Efficiency using Mesocosm Experiment

• LI XIAN-NING

  College of Civil Engineering, Southeast University

• INAISHI TAKAO

  Tsukuba Research Institute, Global Environmental Forum

• NAKAZATO HIROYUKI

  TOP ECOLOGY CO., LTD.

• NOMURA MUNEHIRO

  Graduate School of Engineering, Tohoku University

• NISHIMURA OSAMU

  Graduate School of Engineering, Tohoku University

• INAMORI YUHEI

  National Institute for Environmental Studies

• SUDO RYUICHI

  Center for Environmental Science in Saitama

Bibliographic Information

Other Title

• 水耕生物ろ過法における水面積負荷及び収穫の浄化機能に及ぼす影響と隔離水界を用いた浄化効果の評価
• スイコウ セイブツ ロカホウ ニ オケル スイメンセキ フカ オヨビ シュウカク ノ ジョウカ キノウ ニ オヨボス エイキョウ ト カクリ スイカイ オ モチイタ ジョウカ コウカ ノ ヒョウカ

Abstract

In this study, the effect of water surface loading and harvesting on purification function by hydroponic biofilter method was studied, and the pollution control efficiency with respect to water quality and ecosystem by this method was also studied using mesocosm experiment.<br>In plants growing channels, the average T-N removal rate was obtained as 0.98 g · m^-2 · d^-1 and that of T-P was 0.10 g · m^-2 · d^-1 except in the winter. It was found that the maximum removal rate of T-N was obtained when the water surface loading was set at 5 m³ · m^-2 · d^-1, and those of T-P and Chl.a were obtained while loading set at 4 m³ · m^-2 · d^-1. Thus, it is necessary to set the optimal water surface loading according to the purpose because the removal ratio is observed lower at high loading than at low loading. Furthermore, it turns out that harvest has no influence on outflow by performing suitable harvest. The concentrations of T-N and T-P in mesocosm 1 of plants growing system were found lower than in mesocosm 2 of the control system. The concentrations of Chl.a were found 41.1 μ g · l^-1 in mesocosm 1 and 77.4 μ g · l^-1 in mesocosm 2 at the 25th day, and the densities of Microcystis sp. were 1.1 × 10³ N · ml^-1 in mesocosm 1 and 29 × 10³ N · ml^-1 in mesocosm 2 at the 10th day. This system is thought to be very important to maintain the ecosystem because the nutrient can be removed and algae density be controlled, furthermore Microcystis sp. be removed as control the species of algae.

Journal

• Japanese Journal of Water Treatment Biology

  Japanese Journal of Water Treatment Biology 41 (2), 61-71, 2005

  Japanese Society of Water Treatment Biology

Keywords

• <i>Nasturtium officinale</i>
• planting water purification
• ecosystem
• nutrient
• eutrophication

Details

• CRID: 1390001204963411072
• NII Article ID: 130004912130
• NII Book ID: AN00351126
• DOI: 10.2521/jswtb.41.61
• ISSN: 18810438
• ISSN: 09106758
• NDL BIB ID: 7398583
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7398583
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed