Pollution Source Investigation and Water Quality Management in the Carp Lake Watershed, Taiwan

The first trans-provincial watershed eco-compensation pilot project has been implemented in Xin'anjiang River watershed, standing between China's Anhui Province and Zhejiang Province. The project purpose is to solve the trans-boundary pollution issue, while ensuring sustainable use of water resources. Models have been proved to be effective tools for identifying major environmental objectives, especially in regard to the watershed management of agricultural non-point source pollution. The regional nutrient management (ReNuMa) model was employed to interpret the main environmental problem (nitrogen contamination) generated within Tunxi catchment, the headstream of Xin'anjiang River watershed. After collecting and processing the available data and parameters, ReNuMa simulated stream flow, sediment yields and dissolved nitrogen loads on a monthly scale from 2000 to 2010 and thus estimated total nitrogen loads. Sensitivity and scenarios analysis were done to infer effective management options. The results showed that source apportionments of N loads emphasized the contribution proportion of each pollution source and characterized the temporal variations caused by natural and anthropogenic factors. Effective countermeasures were elicited by a series of scenarios analysis for water quality improvement. The application of the ReNuMa model showed usefulness to plan N management strategy for policy makers, which in turn helped reduce the N loads draining to the downstream, and gained mutual benefits from the ongoing transprovincial watershed eco-compensation pilot project.

Section: Methodsmentioning

confidence: 99%

Application of Regional Nutrient Management Model in Tunxi Catchment: In Support of the Trans‐boundary Eco‐compensation in Eastern China

Liu

Zhao

et al. 2014

“…Microorganisms decompose organic matter into simple nutrients which are removed by plants through direct uptake . Moreover, plant roots grew horizontally and vertically developing a large surface area for the nutrients uptake …”

Section: Role Of Plantsmentioning

confidence: 99%

“…[64,65] Moreover, plant roots grew horizontally and vertically developing a large surface area for the nutrients uptake. [66] Plants also release various kinds of organic compounds (root exudates) that regulate the biological processes such as denitrification. [67] This is particularly effective for nutrient-rich surface water in which nitrate reducers convert nitrates into N 2 gas and release it into the atmosphere.…”

Section: Role Of Plantsmentioning

confidence: 99%

Floating Wetlands: A Sustainable Tool for Wastewater Treatment

Shahid

Arslan

Ali

et al. 2018

101

Floating treatment wetland (FTW) is an effective and sustainable technology for wastewater treatment. It has been widely adopted for treating various kinds of polluted water including agricultural runoff, stormwater, industrial effluents, etc. In FTWs, plants are vegetated on a floating mat while their roots are extended down to the contaminated water hence acting as biological filters. Nutrients and potentially toxic metal(s)/element(s) are taken up from the wastewater by plants through their roots whereas organic matter is degraded by the microorganisms forming biofilms on the roots and mat surface. Additionally, organic contaminants which are already taken up by the plants are degraded by endophytic bacteria in planta. This article provides an overview of FTWs and their application for wastewater treatment. The key factors which have an impact on the performance of FTWs are also described. Lastly, the potential role of combined use of plants and bacteria in FTWs for the maximum remediation of polluted water is emphasized.

“…Then, these cultures were used to inoculate Erlenmeyer flasks containing ZoBell's MB, and the flasks were incubated on a rotatory shaker (180 rpm) at 308C. The growth of P.-SW-1 was measured at 600 nm at regular intervals (0, 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30, and 32 h). The absorbance measurement of the sterile ZoBell's MB was used as the blank measurement for each respective well.…”

Section: Growth Characteristics Of P-sw-1mentioning

confidence: 99%

Screening for and Identification of an Anti‐clam Vibrio Marine Bacterium from an Aquaculture Pond in the Yellow Sea

Sun

Zhao

et al. 2015

The identification and use of probiotic bacterial stains is a practical approach to protect clams grown in aquaculture farms from disease. The inhibition of the pathogenic bacterium Vibrio alginolyticus was used as a trait to select a candidate probiotic bacterial strain in this study. An ideal bacterial strain, SW-1, was isolated from seawater from a clam farm. The selected isolate SW-1 was identified based on its physiological, morphological, and biochemical characteristics and its 16S rDNA sequence. The experiments showed that strain SW-1 had a high similarity to Pseudoalteromonas piscicida and could inhibit the growth of V. alginolyticus (V.-MP-1). SW-1 also improved the survival of clams following challenge with the pathogenic V.-MP-1. The mortality of clams was 100% after infection with 10 8 CFU/mL of V. alginolyticus, whereas mortality was only 11% when clams were infected with 10 8 CFU/mL of V.-MP1 while simultaneously exposed to the same concentration of Pseudoalteromonas SW-1, indicating that Pseudoalteromonas SW-1 could be used as a probiotic to protect farmed clams, and thus reduce the effects of antibiotics on aquatic environment.