Establishing an empirical equation for the relationship between total suspended solids and total phosphorus concentrations in the downstream Red river water

Recently, the Asian rivers have faced the strong reduction of riverine total suspended solids (TSS) flux due to numerous dam/reservoir impoundment. The Red river system is a typical example of the Southeast Asian rivers that has been strongly impacted by reservoir impoundment in both China and Vietnam, especially in the recent period. It is known that the reduction in total suspended solids may lead to the decrease of some associated elements, including nutrients (N, P, Si) which may affect coastal ecosystems. In this paper, we establish the empirical relationship between total suspended solids and total phosphorus concentrations in water environment of the Red river in its downstream section from Hanoi city to the Ba Lat estuary based on the sampling campaigns conducted in the dry and wet seasons in 2017, 2018 and 2019. The results show a clear relationship with significant coefficient between total suspended solids and total phosphorus in the downstream Red river. It is expressed by a simple equation y = 0.0226x0.3867 where x and y stand for total suspended solids and total phosphorus concentrations (mg/l) respectively with the r2 value of 0.757. This equation enables a reasonable prediction of total phosphorus concentrations of the downstream Red river when the observed data of total suspended solids concentrations are available. Thus, this work opens up the way for further studies on the calculation of the total phosphorus over longer timescales using daily available total suspended solids values.

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Assessment of Freshwater Inflow and Water Quality for an Urbanized, Subtropical Estuary (Lake Worth Lagoon, Florida, USA)

Marine Technology Society Journal ◽

10.4031/mtsj.52.4.2 ◽

2018 ◽

Vol 52 (4) ◽

pp. 19-31

Author(s):

Christopher Buzzelli ◽

Zhiqiang Chen ◽

Peter Doering ◽

Amanda Kahn

Keyword(s):

Water Quality ◽

Total Nitrogen ◽

Total Phosphorus ◽

Suspended Solids ◽

Environmental Parameters ◽

Total Suspended Solids ◽

South Florida ◽

Freshwater Inflow ◽

Spatial And Temporal Variability ◽

Palm Beach County

Abstract Coastal water bodies are impacted by watershed alterations, increased population density, modifications to inlets and shorelines, climatic periodicity, and increases in external material loads. Estuaries such as Lake Worth Lagoon (LWL) in south Florida possess all these attributes. The LWL watershed extends from the southeastern portion of Lake Okeechobee through Palm Beach County, where it meets the lagoon. Palm Beach County Department of Environmental Resources Management recognizes the social and ecological importance of the ~36 km lagoon and aims to maintain suitable water and habitat quality for all stakeholders. Recent declines and shifts of seagrass distribution along the lagoon prompted a step toward better understanding the water quality patterns of the system. In support of these efforts, this study assessed bathymetry, inflow, flushing, and water quality attributes (chlorophyll a, salinity, total nitrogen, total phosphorus, total suspended solids, turbidity) using data collected along a series of 14 midlagoon stations from 2007 to 2015. Salinity in the North Segment was higher and less variable because of proximity to Palm Beach Inlet. Although concentrations of chlorophyll a, total nitrogen, and total phosphorus correlated with freshwater inflow, turbidity and total suspended solids were not. Fast flushing of the lagoon on a scale of days likely precludes water quality issues common to many estuaries with higher resident times. However, the combination of landscape-scale water management, a shoreline that is almost 70% modified by hard structures, and changes in essential nearshore habitats, introduces new levels of uncertainty to both the understanding and management of LWL. From this study, increased knowledge of relationships among water quality parameters and their spatial and temporal variability in LWL provides points of reference from which targeted studies can be developed to explore links between environmental parameters and responses of key organisms in this unique system.

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The Efficiency and Reliability of Pollutant Removal in a Hybrid Constructed Wetland with Common Reed, Manna Grass, and Virginia Mallow

Water ◽

10.3390/w10101445 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1445 ◽

Cited By ~ 8

Author(s):

Michał Marzec ◽

Krzysztof Jóźwiakowski ◽

Anna Dębska ◽

Magdalena Gizińska-Górna ◽

Aneta Pytka-Woszczyło ◽

...

Keyword(s):

Total Nitrogen ◽

Total Phosphorus ◽

Constructed Wetland ◽

Suspended Solids ◽

Treatment Plant ◽

Oxygen Demand ◽

Total Suspended Solids ◽

Common Reed ◽

Pollutant Removal ◽

Limit Values

In this paper, the pollutant removal efficiency and the reliability of a vertical and horizontal flow hybrid constructed wetland (CW) planted with common reed, manna grass, and Virginia mallow were analyzed. The wastewater treatment plant, located in south-eastern Poland, treated domestic sewage at an average flow rate of 2.5 m3/d. The tests were carried out during five years of its operation (2014–2018). The following parameters were measured: biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total suspended solids, total nitrogen, and total phosphorus. The results showed that more than 95% of BOD5, COD, and total phosphorus was removed in the tested CW system. The average effectiveness of removal of total suspended solids and total nitrogen exceeded 86%. A reliability analysis performed using the Weibull probability model showed that the removal reliability in the tested CW was very high for BOD5, COD, total suspended solids, and total phosphorus (100%). The probability that the total nitrogen concentration in the treated effluents would reach the limit value (30 mg/L) established for effluents discharged from a treatment plant of less than 2000 PE (population equivalent) to standing waters was 94%. The values of all the pollution indicators in wastewater discharged to the receiver were significantly lower than the limit values required in Poland. The investigated hybrid CW system with common reed, manna grass, and Virginia mallow guaranteed stable low values of BOD5, COD, total suspended solids, and total phosphorus in the treated wastewater, which meant it was highly likely to be positively evaluated in case of an inspection.

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Reed beds: constructed wetlands for municipal wastewater treatment plant sludge dewatering

Water Science & Technology ◽

10.2166/wst.2001.0857 ◽

2001 ◽

Vol 44 (11-12) ◽

pp. 393-398 ◽

Cited By ~ 26

Author(s):

J.S. Begg ◽

R.L. Lavigne ◽

P.L.M. Veneman

Keyword(s):

Wastewater Treatment ◽

Total Phosphorus ◽

Biochemical Oxygen Demand ◽

Suspended Solids ◽

Oxygen Demand ◽

Total Suspended Solids ◽

Sludge Dewatering ◽

Sludge Treatment ◽

Reed Beds ◽

Reed Bed

Reed beds are an alternative technology wastewater treatment system that mimic the biogeochemical processes inherent in natural wetlands. The purpose of this project was to determine the effectiveness of a reed bed sludge treatment system (RBSTS) in southern New England after a six-year period of operation by examining the concentrations of selected metals in the reed bed sludge biomass and by determining the fate of solids and selected nutrients. Parameters assessed in both the reed bed influent and effluent: total suspended solids, biochemical oxygen demand, nitrate-nitrogen and total phosphorus. In addition, the following metals were studied in the reed bed influent, effluent and Phragmites plant tissue and the sludge core biomass: boron, cadmium, chromium, copper, iron, lead, manganese, molybdenum, nickel, and zinc. The removal efficiencies for sludge dewatering, total suspended solids and biochemical oxygen demand were all over 90%. Nitrate and total phosphorus removal rates were 90% and 80% respectively. Overall metals removal efficient was 87%. Copper was the only metal in the sludge biomass that exceeded the standards set by the Massachusetts Department of Environmental Protection for land disposal of sludge. The highest metal concentrations, for the most part, tended to be in the lower tier of the sludge profile. The exception was boron, which was more concentrated in the middle tier of the sludge profile. The data and results presented in this paper support the notion that reed bed sludge treatment systems and the use of reed beds provide an efficient and cost effective alternative for municipal sludge treatment.

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Efficiency of Sewage Treatment Plants in the Sequential Batch Reactor

Civil and Environmental Engineering Reports ◽

10.2478/ceer-2018-0040 ◽

2018 ◽

Vol 28 (3) ◽

pp. 121-131 ◽

Cited By ~ 1

Author(s):

Anita Jakubaszek ◽

Artur Stadnik

Keyword(s):

Wastewater Treatment ◽

Total Nitrogen ◽

Total Phosphorus ◽

Suspended Solids ◽

Wastewater Treatment Plants ◽

Batch Reactor ◽

Sewage Treatment ◽

Total Suspended Solids ◽

Sewage Treatment Plants ◽

Sequential Batch Reactor

Abstract The article analyzes the effectiveness of individual Actibloc wastewater treatment plants (produced by Sotralentz) working in the technology of low-rate activated sludge in the Sequential Batch Reactor (SBR) system. The assessment of the effectiveness of household wastewater treatment plants was made on the basis of pollutants: BOD5, COD, total suspended solids, total nitrogen and total phosphorus. The research objects were four household sewage treatment plants located in: Lubań, Kłębanowice, Stara Rzeka and Kościan. The efficiency of removing pollutants in the examined facilities was in the range of: BOD5 92.2 ÷ 97.2%, COD 82.6 ÷ 89.9%, total suspended solids 90.2 ÷ 96.2%, total nitrogen 50.8 ÷ 83.1%, total phosphorus 46.5 ÷ 73.6%. The treated wastewater met the requirements set out in the Regulation of the Minister of the Environment on the conditions to be met when discharging sewage into water or soil, and on substances particularly harmful to the aquatic environment (Journal of Laws 2014, item 1800) in terms of indicators such as BOD5, COD, total suspended solids and total nitrogen. The effectiveness of phosphorus removal in the studied treatment plants was much lower.

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Comparative analysis of the quality of sewage discharged from selected agglomeration sewerage systems

Journal of Water and Land Development ◽

10.1515/jwld-2016-0019 ◽

2016 ◽

Vol 30 (1) ◽

pp. 35-42 ◽

Cited By ~ 3

Author(s):

Krzysztof Chmielowski ◽

Piotr Bugajski ◽

Grzegorz B. Kaczor

Keyword(s):

Comparative Analysis ◽

Total Nitrogen ◽

Total Phosphorus ◽

Suspended Solids ◽

Wastewater Treatment Plants ◽

Total Suspended Solids ◽

Design Stage ◽

Research Papers ◽

Pollution Indicators

AbstractThe study provides a comparative analysis of the quality of sewage discharged from selected sewerage systems. The analyzed data were collected from 10 agglomeration sewerage systems discharging sewage into collective wastewater treatment plants (WTP). The investigated pollution indicators included BOD5, CODCr, total suspended solids and biogenic indicators such as total nitrogen and total phosphorus. These results were compared with the outcomes reported in commonly available research papers on sewage disposal. Considering the concentration of individual pollution indicators, more detailed categories of sewage pollution were adopted in this work. The sewage was divided into five basic groups: I – highly concentrated, II – concentrated, III – moderately concentrated, IV – diluted, and V – highly diluted. The sewage categories accounted for the following pollution indicators: BOD5, CODCr, total suspended solids, total phosphorus and total nitrogen. Mean BOD5, CODCr and total suspended solids in raw sewage were higher than average values reported in the referenced literature. Contrary to that, concentration of total phosphorus in raw sewage was significantly lower than reported by other authors. The outcomes of this study suggest that the predictions concerning pollution degree of raw sewage made at WTP design stage should not be based exclusively on general values provided in literature reports.

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Influence of Sampling Frequency on Estimation of Annual Total Phosphorus and Total Suspended Solids Loads1

JAWRA Journal of the American Water Resources Association ◽

10.1111/j.1752-1688.2012.00684.x ◽

2012 ◽

Vol 48 (6) ◽

pp. 1258-1275 ◽

Cited By ~ 32

Author(s):

Amber Spackman Jones ◽

Jeffery S. Horsburgh ◽

Nancy O. Mesner ◽

Ronald J. Ryel ◽

David K. Stevens

Keyword(s):

Total Phosphorus ◽

Suspended Solids ◽

Total Suspended Solids ◽

Sampling Frequency ◽

Annual Total

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Remote Sensing Evaluation of Total Suspended Solids Dynamic with Markov Model: A Case Study of Inland Reservoir across Administrative Boundary in South China

Sensors ◽

10.3390/s20236911 ◽

2020 ◽

Vol 20 (23) ◽

pp. 6911

Author(s):

Jing Zhao ◽

Fujie Zhang ◽

Shuisen Chen ◽

Chongyang Wang ◽

Jinyue Chen ◽

...

Keyword(s):

Remote Sensing ◽

Water Quality ◽

Markov Model ◽

South China ◽

Human Activities ◽

Suspended Solids ◽

Water Environment ◽

Total Suspended Solids ◽

Large Reservoir ◽

The Impact

Accurate and quantitative assessment of the impact of natural environmental changes and human activities on total suspended solids (TSS) concentration is one of the important components of water environment protection. Due to the limits of traditional cross-sectional point monitoring, a novel water quality evaluation method based on the Markov model and remote sensing retrieval is proposed to realize the innovation of large-scale spatial monitoring across administrative boundaries. Additionally, to explore the spatiotemporal characteristics and driving factors of TSS, a new three-band remote sensing model of TSS was built by regression analysis for the inland reservoir using the synchronous field spectral data, water quality samples and remote sensing data in the trans-provincial Hedi Reservoir in the Guangdong and Guangxi Provinces of South China. The results show that: (1) The three-band model based on the OLI sensor explained about 82% of the TSS concentration variation (R2=0.81, N=34, p value<0.01) with an acceptable validation accuracy (RMSE=6.24 mg/L,MRE=18.02%, N=15), which is basically the first model of its kind available in South China. (2) The TSS concentration has spatial distribution characteristics of high upstream and low downstream, where the average TSS at 31.54 mg/L in the upstream are 2.5 times those of the downstream (12.55 mg/L). (3) Different seasons and rainfall are important factors affecting the TSS in the upstream cross-border area, the TSS in the dry season are higher with average TSS of 33.66 mg/L and TSS are negatively correlated with rainfall from upstream mankind activity. Generally, TSS are higher in rainy seasons than those in dry seasons. However, the result shows that TSS are negatively correlated with rainfall, which means human activities have higher impacts on water quality than climate change. (4) The Markov dynamic evaluation results show that the water quality improvement in the upstream Shijiao Town is the most obvious, especially in 2018, the improvement in the water quality level crossed three levels and the TSS were the lowest. This study provided a technical method for remote sensing dynamic monitoring of water quality in a large reservoir, which is of great significance for remediation of the water environment and the effective evaluation of the river and lake chief system in China.

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