Advances in Water Purification for Pond Freshwater Aquaculture

Hao, Yufan; Zhu, Jian Qiang; Gu, Lian‐Quan

doi:10.4028/www.scientific.net/amr.955-959.3928

Cited by 3 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…China is the largest aquaculture country in the world. Currently, over 80% of aquaculture has adopted an intensive cultivation pattern, large quantities of nitrogen and phosphorus are produced during the metabolism of aquatic animals, and the decomposition of excessive feed residues in the aquaculture [1]. The discharge of untreated aquaculture wastewater can seriously pollute surface waters and lakes, causing a series of social and environmental problems [2].…”

Section: Introductionmentioning

confidence: 99%

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

et al. 2020

View full text Add to dashboard Cite

Nanospheres were prepared by different materials of nano-bamboo charcoal powder, zeolite powder, and aquaculture pond sediment in different ratios. It was then fermented with effective microorganisms (EM) active calcium liquid to synthesize the bioactive microbial nanospheres. These nanospheres were used to compare the purification effect of ammonium nitrogen (NH 4 + -N), total nitrogen (TN), and total phosphorus (TP) pollutants in aquaculture wastewater. The indoor simulation experiment was also conducted to compare the different dosage methods (one-time dosing without aeration, multiple dosing without aeration, and multiple dosing with aeration) of microbial nanospheres on the removal of organic matter (OM) and effect of the biodegradability (G value) in aquaculture sediment. The results obtained indicated that the purification effect was most remarkable when the mass ratio of nano-bamboo charcoal powder: zeolite powder: pond sediment was 10%: 15%: 75%, in which the maximum removal rate of NH 4 + -N, TN, and TP reached up to 84.86%, 52.15%, and 50.35%, respectively. Under the same microbial nanospheres amount, the effect of one-time addition on the removing of OM in sediment was not as effective as that of multiple dosing. After the 20th day, the removal rate of OM reached 25.99% in multiple dosing treatment and it was 35.58% higher than one-time dosing treatment. The OM content in sediment was reduced by 32.38% under the multiple dosing with aeration treatment. Multiple dosing of microbial nanospheres with aeration increased the G value of sediment about 337.0%. In situ experiment further indicated that the microbial nanospheres dosage with aeration had a good sediment bio-remediation effect, which is applicable to solve the problem of endogenous pollution in aquaculture ponds.leads to the ecological degradation and the serious diseases [3]. Therefore, repairing the eutrophic aquaculture environment requires not only the reduction of nitrogen, phosphorus, and organic matter in the aquaculture water, but also the removal of the sediment mud. In the aspect of aquaculture water purification, the leading technologies include biological filter treatment [4], artificial floating bed cultivation [5], artificial wetland [6], and so on. Due to the shortage of freshwater resources, the high density of breeding and a large amount of bait in the aquaculture industry as well as the present aquaculture water treatments still have problems, such as single treatment method adoption, high cost, and difficult operation [7]. In recent years, a new type of circulating water pond model is applied to reduce the nitrogen and phosphorus content in the aquaculture water, mainly relying on aquatic plants and microbes function [8]. Many studies [9][10][11] have found the composite microbial agents composed of various microbes could make the control effects of aquaculture water quality better. The EM population (containing more than 80 kinds of microbes, with photosynthetic bacteria, lactic acid bacteria, yeast, and actinomycetes as repr...

show abstract

Section: Introductionmentioning

confidence: 99%

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

et al. 2020

View full text Add to dashboard Cite

show abstract

“…According to statistics, pond culture is one of the major approaches for freshwater aquaculture, which comprises 43.94% (2.7×10 6 hm 2 ) of the total freshwater area in China [1] . To date, more than 80% of aquaculture has adopted an intensive cultivation pattern to meet the increasing demand, which brings a serious impact of environment [2] . Previous studies have shown that a large amount of nutrients (bait, fertilizer, etc.)…”

Section: Introduction mentioning

confidence: 99%

Bioremediation of nitrogen- and phosphorus-polluted aquaculture sediment by utilizing combined immobilized effective microorganisms and sediment aeration technology

Wang¹,

Shao²,

Xu³

et al. 2019

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

The endogenous release of nitrogen and phosphorus from aquaculture sediment can continuously pollute the water quality in aquaculture ponds. In this study, an integrated bioremediation approach that combined effective microorganisms (EM) with aeration techniques was designed to restore contaminated aquaculture sediment. Initially, a set of laboratory-scale experiments was designed to evaluate the feasibility of the technology for the bioremediation of nitrogen and phosphorus. The removal and transformation efficiency indexes of both the overlying water and sediment were measured. From the obtained results, the combination of sediment aeration and immobilized EM significantly improved the nitrogen and phosphorus removal rate from the overlying water and sediment when compared to other methods. Subsequently, a series of field-scale experiments was further implemented to assess the integrated technique in practical applications. In field experiments, the variation in the comprehensive trophic level index (TLI) and sediment biodegradation activities (G value) was used to assess the effect of sediment bioremediation. In pond II which promotes sediment biodegradation, the values of TLI varied from 70.13 to 54.16, and the classification level changed from Hypereutrophic to a Light eutrophic. In addition, the G value increased from 0.98 kg/(kg•h) to 2.12 kg/(kg•h). The organic matter (OM) and sediment thickness (ST) decreased by 17.4 g/kg and 2.3 cm, respectively. The obtained results indicated that the combination of EM and sediment aeration might be feasible and effective for the remediation of nitrogen-and phosphorus-polluted aquaculture sediment.

show abstract

“…Recently, with the development of aquaculture, water quality deterioration has become more acute due to the excessive feeding, abuse of fishery drugs and high stocking intensity (Ye et al 2014). In this case, water purification seems to be of great importance and a number of approaches have been adopted for aquaculture wastewater treatment including phytoremediation (Mook et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Analysis of microbiota in rhizosphere, water and gut of grass carp (Ctenopharyngodon idella) in ponds treated with artificial floating beds

et al. 2017

Water & Environment J

View full text Add to dashboard Cite

With the increasing demand for environment friendly aquaculture, artificial floating beds have been now widely applied. However, there are few data available on the effect on microbiota in ponds. This study assessed the rhizobacteria community of artificial floating beds with three different kinds of aquatic plants [water spinach (Ipomoea aquatic), water hyacinth (Eichhornia crassipes) and alligator weed (Alternanthera philoxeroides)]. We used Polymerase Chain Reaction‐Denaturing Gradient Gel Electrophoresis to assess whether artificial floating beds would result in changes in microbiota of pond water and gut of grass carp (Ctenopharyngodon idella). The results showed that there existed no significant differences in rhizobacterial composition, and artificial floating beds would not greatly affect the microbiota of pond water. The dominant microbiota in the guts of grass carp changed from Aeromonas jandaei to Paenibacillus sp. Our results indicated that artificial floating beds may serve as a candidate of modulating fish gut microbiota.

show abstract

Advances in Water Purification for Pond Freshwater Aquaculture

Cited by 3 publications

References 13 publications

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

Bioremediation of nitrogen- and phosphorus-polluted aquaculture sediment by utilizing combined immobilized effective microorganisms and sediment aeration technology

Analysis of microbiota in rhizosphere, water and gut of grass carp (Ctenopharyngodon idella) in ponds treated with artificial floating beds

Contact Info

Product

Resources

About