Suitability of Nansha Mangrove Wetland for High Nitrogen Shrimp Pond Wastewater Treatment

Wang, Dan; Xie, Xiaogao; Tang, Wanhu; Pan, Hongzhong; Luo, Jie

doi:10.1007/s00128-020-03060-z

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…The fitted response surface plot shows that less turbidity will be removed from the aquaculture wastewater at a higher pH above 7.0. The results of turbidity removal using chitosan from carapace of M. rosenbergii are higher than those of [ 79 , 80 ], who reported 74.5% and 46.84%, respectively, from wastewater.…”

Section: Resultscontrasting

confidence: 69%

“…Many aquaculture systems are carried out using marine water and, as such, the wastewater generated needs to be treated before discharge into the environment. High salinity aquaculture wastewater has been reported to adversely affect adjacent lands and other water bodies, including mangrove wetlands [ 80 ]. Although many studies have expressed the difficulty in salinity removal using the coagulation/flocculation process [ 81 , 82 ], this study recorded a little success in this regard.…”

Section: Resultsmentioning

confidence: 99%

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Response Surface Methodology (RSM) Approach to Optimization of Coagulation-Flocculation of Aquaculture Wastewater Treatment Using Chitosan from Carapace of Giant Freshwater Prawn Macrobrachium rosenbergii

et al. 2023

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The major sources of waste from aquaculture operations emanates from fish or shellfish processing and wastewater generation. A simple technique called coagulation/flocculation utilizes biowaste from aquaculture to produce chitosan coagulant for wastewater treatment. A chemical method was applied in the present study for chitin and chitosan extraction from carapace of Macrobrachium rosenbergii and subsequent application for removal of turbidity and salinity from shrimp aquaculture wastewater. Box-Behnken in RSM was used to determine the optimum operating conditions of chitosan dosage, pH, and settling time, after which quadratic models were developed and validated. Results show that 80 g of raw powder carapace yielded chitin and chitosan of 23.79% and 20.21%, respectively. The low moisture (0.38%) and ash (12.58%) content were an indication of good quality chitosan, while other properties such as water-binding capacity (WBC), fat-binding capacity (FBC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscope (SEM) confirmed the structure and the α-group, as well as the rough morphology of chitosan. In addition, the high solubility (71.23%) and DDA (85.20%) suggested good coagulant potentials. It was recorded in this study that 87.67% turbidity was successfully removed at 20 mg/L of chitosan dosage and 6.25 pH after 30 min settling time, while 21.43% salinity was removed at 5 mg/L of chitosan dosage, 7.5pH, and 30 min settling time. Therefore, the process conditions adopted in this study yielded chitosan of good quality, suitable as biopolymer coagulant for aquaculture wastewater treatment.

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Section: Resultscontrasting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Response Surface Methodology (RSM) Approach to Optimization of Coagulation-Flocculation of Aquaculture Wastewater Treatment Using Chitosan from Carapace of Giant Freshwater Prawn Macrobrachium rosenbergii

et al. 2023

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“…A study on shrimp effluent water in Nansha County, China showed that mangroves receiving shrimp wastewater were able to eliminate nitrite (NO 2 ), nitrate (NO 3 ) and ammonium ions (NH 4 þ ) with efficiency of 43.6%, 41.2% and 65.0% respectively. However, results indicated that mangroves receiving shrimp wastewater had 2 to 3 times higher levels of CH 4 (0.695 mgL À1 ) and 3 to 9 higher levels of N 2 O (0.493 mg LÀ1) than wetland without shrimp effluent water (Wang et al, 2021). The results of this study prove the fact that whereas mangrove wetlands are capable of absorbing the excess N and P from the shrimp effluent water, their inability to prevent greenhouse gases emission has made it imperative for proper wastewater treatment before discharge.…”

Section: 12environmental Benefitsmentioning

confidence: 91%

Recent advances in Shrimp aquaculture wastewater management

Iber

Kasan

2021

Heliyon

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“…Over-reliance on the natural remediation capacity of existing mangroves forests comes with significant risks, potentially having adverse effects for the ecosystems services they provide. Recent attention has been directed towards the impacts of effluent on soil composition and carbon stocks, where continual aquaculture effluent has driven cumulative increases in soil nutrients, increased emissions, and contributed to localized eutrophication potential [140][141][142][143][144]. Cumulative impacts, including effects to aquatic food webs, from high-production areas as seen in Asia, likely have significantly larger influence on natural nitrogen cycling than previously anticipated [35].…”

Section: Ecosystem Services and Benefits To The Environmentmentioning

confidence: 99%

A nature-based solutions approach to managing shrimp aquaculture effluent

Goto,

Corwin,

Farthing

et al. 2023

PLOS Sustain Transform

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While coastal habitat conversion was a primary environmental concern in Asia for the mostly extensive shrimp aquaculture sector in previous decades, the transition towards intensive production is creating new environmental risks, primarily water quality impacts from nutrient-rich effluent. There is a need to compare the performance of conventional and Nature-based Solution (NbS) effluent treatment options given the increasing nutrient loads from more intensive aquaculture and historic loss of ecosystem services from mangrove deforestation. This study evaluates the potential for common and emerging effluent treatment systems to address total nitrogen and total phosphorus effluent from shrimp farms across a spectrum of production intensities. Nutrient waste loading for four stocking density scenarios (7PLm-2, 20PLm-2, 75PLm-2, and 120PLm-2) are estimated to compare the treatment efficiency, economic feasibility, spatial requirements, and ecosystem service provision of conventional and NbS effluent treatment systems. We use secondary data to assess effluent treatment systems applicable for shrimp aquaculture in Asia. Findings provide the conceptual framework for comparing the characteristics and tradeoffs of aquaculture effluent treatment systems. Constructed mangrove wetlands are an NbS approach that can meet the intensification needs of aquaculture producers and reduce negative impacts from aquaculture effluent at competitive costs, while also providing ecosystem service co-benefits.

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Suitability of Nansha Mangrove Wetland for High Nitrogen Shrimp Pond Wastewater Treatment

Cited by 7 publications

References 19 publications

Response Surface Methodology (RSM) Approach to Optimization of Coagulation-Flocculation of Aquaculture Wastewater Treatment Using Chitosan from Carapace of Giant Freshwater Prawn Macrobrachium rosenbergii

Response Surface Methodology (RSM) Approach to Optimization of Coagulation-Flocculation of Aquaculture Wastewater Treatment Using Chitosan from Carapace of Giant Freshwater Prawn Macrobrachium rosenbergii

Recent advances in Shrimp aquaculture wastewater management

A nature-based solutions approach to managing shrimp aquaculture effluent

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