Study on Bioaugmention Technologies of Eutrophication Landscape Water

2013 ◽  
Vol 816-817 ◽  
pp. 1287-1290
Author(s):  
Zong Zheng Yang ◽  
Huan Zhang ◽  
De Qiang Zhang ◽  
Jin Zhao Pang
Keyword(s):  
Dissolved Oxygen ◽  
Chlorophyll A ◽  
Organic Substance ◽  
Photosynthetic Bacteria ◽  
Nitrifying Bacteria ◽  
Nitrogen Compounds ◽  
Removal Rates ◽  
Urban Lakes ◽  
Inoculation Method ◽  
Landscape Water

This inoculation method inputting photosynthetic bacteria, nitrifying bacteria, compound bacteria etc into the water, to degrade pollutants of the urban lakes in this paper. The results show that, the removal rates of organic substance, chlorophyll-a and nitrogen compounds were 60%, 90% and 50% respectively .Moreover, dissolved oxygen (DO) content increased from 1 to 7 mg/L by adding microbes. The conclusion can be drawn that its feasible for adding microbes into eutrophication water to decontaminate water.

Study on the Restoration of Eutrophic Landscape Water by Microbe-Technology

2011 ◽  
Vol 347-353 ◽  
pp. 1405-1410
Author(s):  
Zong Hua Wang ◽  
Yu Bin Zhao
Keyword(s):  
Chlorophyll A ◽  
Photosynthetic Bacteria ◽  
Experimental Results ◽  
Nitrifying Bacteria ◽  
Landscape Water ◽  
Restoration Effect

Some high effective microbes, photosynthetic bacteria, nitrifying bacteria, and corn-pound bacteria etc were used, to degrade pollutants of lake and the restoration characteristics were investigated. The experimental results showed that the restoration effect appeared 4 days later and got the best condition 22 days later. CODMn, NH3-N, TN, Tp and chlorophyll-a decreased rapidly and DO was improved from 7.2 mg/L to 8.5 mg/L.Ch1.-a related well to TP, CODMn, TN.

A study of water quality in an urban river and potential improvement using a prototype instream aerator

1989 ◽  
Vol 16 (3) ◽  
pp. 308-316 ◽  
Author(s):  
C. A. Town ◽  
D. S. Mavinic ◽  
B. Moore
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Data Base ◽  
Chlorophyll A ◽  
Late Summer ◽  
Urban River ◽  
Agricultural Activity ◽  
Fish Kills ◽  
Low Dissolved Oxygen ◽  
Oxygen Levels

Urban encroachment and intensive agricultural activity within the Serpentine–Nicomekl watershed (near Vancouver, B.C.) have caused a series of fish (salmon) kills on the Serpentine River since 1980. Low dissolved oxygen was responsible for these kills. This field project investigated some of the dynamic chemical and biological relationships within the river, as well as the use of an instream aerator as a temporary, in situ, water quality improvement measure. Weekly sampling for a 6-month period during the latter half of 1985 established a solid data base for deriving and interpreting meaningful interrelationships. A strong correlation between chlorophyll a and dissolved oxygen levels before the algae die-off supported the hypothesis that algae blooms dying in the fall could create a serious oxygen demand. Because of these environmental conditions, the river is unable to sustain healthy dissolved oxygen levels during this period. As such, a prototype, 460 m artificial aeration line was designed, installed, and monitored to evaluate its potential for alleviating low dissolved oxygen conditions and improving overall water quality during the critical fall period.The instream aerator ran continuously for over 2 months, starting in September 1985. Despite better-than-expected weather conditions (i.e., cool, wet weather) and relatively high dissolved oxygen levels during the fall of 1985, the data base appeared to support the use of this prototype aeration unit as a means of "upgrading" a stretch of an urban river subject to periodic, low dissolved oxygen levels. As a result, a 2-year follow-up study and river monitoring was initiated. In both 1986 and 1987, late summer and early fall river conditions resulted in the potential for serious salmon kills, due to higher-than-normal river temperatures and very low dissolved oxygen. In both instances, the instream aerator prevented such fish kills in a key stretch of the river. Expansion of the system to include other critical stretches of the Serpentine and other urban river systems, near Vancouver, is being considered. Key words: algae, aerator, chlorophyll a, eutrophic, fish kills, instream aeration, river improvement, urban river.

scholarly journals Effect of Cell Density on the Removal of Microcystis by Coagulation

2020 ◽  
Vol 42 (6) ◽  
pp. 319-326
Author(s):  
Joo Eun Han ◽  
Wontae Lee
Keyword(s):  
Surface Water ◽  
Chlorophyll A ◽  
Cell Density ◽  
Target Cell ◽  
Removal Rate ◽  
Nakdong River ◽  
Removal Rates ◽  
Cell Densities

Objectives:This study evaluated the removal of <i>Microcystis</i> by coagulation in raw waters with three different cell densities.Methods:Raw waters were prepared at three different cell densities (target cell densities of 10,000, 100,000, and 1,000,000 cell/mL; actual cell densities of 9,950, 102,000, and 991,000 cell/mL) by adding <i>Microcystis</i> into surface water from Nakdong river. Jar-tests were conducted with PACL, alum, illite, and loess at dosages of 0-150 mg/L.Results and Discussion:Regardless of coagulant types, the removal rates of <i>Microcystis</i> increased as the coagulant dosages increased. PACl and alum exhibited higher removal rates than illite and loess; PACl was the best coagulant to remove <i>Microcystis</i>. Removal of chlorophyll-a was highest when PACl added at 20.4 mg/L, and no significant increase in removal rate was observed with higher dosages of PACl. However, removal rates of chlorophyll-a by illite and loess gradually increased as the dosages increased.Conclusions:With the coagulants tested in this study, removal rates of <i>Microcystis</i> increased as the coagulant dosages increased. Removal rates of <i>Microcystis</i> increased as the cell densities increased probably because <i>Microcystis</i> acted as particles which could enhance the coagulation efficiency.

Correlation between Chlorophyll-a Concentration and Environmental Factors in Jihongtan Reservoir

2011 ◽  
Vol 356-360 ◽  
pp. 959-962
Author(s):  
Ji Ping Ma ◽  
Cui Jie Rui ◽  
Jian Hua Ge ◽  
Yu Hua Liu ◽  
Zhi Wen Song ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Environmental Factors ◽  
Dissolved Oxygen ◽  
Statistical Method ◽  
Chlorophyll A ◽  
Potassium Permanganate ◽  
Total Nitrogen ◽  
Average Concentration ◽  
Low Concentrations ◽  
High Concentrations

Based on the Jihogntan reservoir’s monitoring data from 2006 to 2009, eutrophication of Jihongtan reservoir was assessed. The result showed that the nutrition level of the Jihongtan reservoir was middle in recent years. The average concentration of chlorophyll-a(Chla) was higher in summer and autumn than in spring and winter. The correlation between concentration of Chla and some environmental factors was studied by statistical method, and seasonal variation of Chla and the extent of eutrophication were also analyzed. The results showed that the correlations between Chla and total nitrogen(TN), dissolved oxygen(DO) and transparency were significantly negative, and that between Chla and total phosphorus(TP), temperature(T) and potassium permanganate index(COD Mn) were significantly positive. The growth of phytoplankton was promoted by TP and TN at low concentrations, and inhibited by TN at high concentrations.

Characterization of microbial communities in exhaust air treatment systems of large-scale pig housing facilities

2010 ◽  
Vol 62 (7) ◽  
pp. 1551-1559 ◽  
Author(s):  
J. Haneke ◽  
N. M. Lee ◽  
T. W. Gaul ◽  
H. F. A. Van den Weghe
Keyword(s):  
Microbial Communities ◽  
Large Scale ◽  
Dust Particles ◽  
Nitrifying Bacteria ◽  
Ammonium Concentration ◽  
Nitrogen Compounds ◽  
Air Treatment ◽  
Fattening Period ◽  
Washing Water ◽  
Housing Facilities

Exhaust air treatment has gained importance as an essential factor in intensive livestock areas due to the rising emissions in the environment. Wet filter walls of multi-stage exhaust air treatment systems precipitate gaseous ammonia and dust particles from exhaust air in washing water. Microbial communities in the biomass developed in the washing water of five large-scale exhaust air treatment units of pig housing facilities, were investigated by fluorescence in situ hybridization (FISH) and 16S rDNA sequence analyses. No “standard” nitrifying bacteria were found in the washing water. Instead mainly α-Proteobacteria, aggregating β- and χ-Proteobacteria, a large number of Actinobacteria, as well as individual Planctomycetales and Crenarchaeota were detected after more than twelve months' operation. The main Proteobacteria species present were affiliated to the families Alcaligenaceae, Comamonadaceae and Xanthomonadaceae. Furthermore, we investigated the consumption of inorganic nitrogen compounds in the washing water of one exhaust air treatment unit during a fattening period with and without pH control. Maintaining the pH at 6.0 resulted in a ca. fivefold higher ammonium concentration and a ca. fourfold lower concentration of oxidized nitrogen compounds after the fattening period was finished.

A Study on Concentrations of Dissolved Oxygen and Chlorophyll-a in the Coastal Waters of Babolsar

2009 ◽  
Vol 6 (10) ◽  
pp. 1860-1867 ◽  
Author(s):  
Siamak Jamshidi ◽  
Noordin Bin Abu Ba ◽  
Marzieh Yousefi
Keyword(s):  
Dissolved Oxygen ◽  
Chlorophyll A ◽  
Coastal Waters
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