Water quality and growth of phytoplankton for the Yellow River estuary reservoirs—The nutrients release from reservoir sediments

YUKIHIKO TAKAHASHI^1,2

1.Original Engineering Consultants Co., LTD, Tokyo162-0814,Japan;2.School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China



Abstract:

Effects of nutrients released from sediments on eutrophication in lakes and reservoirs were not well known in China. In the test, the release conditions of nitrogen and phosphorus from the sediments were observed by batch experiment. The test results revealed that the content released is correlated to the initial content of organic matter in sediments. In the Gengjing area, when the water quality of waterway, grit chamber and reservoir were compared, the water quality of the waterway was the highest, and lowered in the order of the grit chamber and the reservoir. The grit chamber could get not only fine sand removal but also the organic substance, nitrogen, phosphorus and phytoplankton, therefore it is important to operate and maintain the grit chamber to preserve the water quality of the reservoir. Due to little organic substance in sediments, ammonium nitrogen and phosphorus weren’t released during the incubation. But from the absorptiometric turbidity unit (ATU) test results, although the release of ammonium concentration was very low, ammonium oxidizing and nitrite oxidizing bacteria existed in sediments.

Key words:  nutrients  batch experiment  waterway  grit chamber  reservoir  ammonium nitrogen and phosphorus

DOI：10.11916/j.issn.1005-9113.2011.02.013

Clc Number:X52

Fund: