How suspended solids concentration affects nitrification rate in microalgal-bacterial photobioreactors without external aeration

Foladori, P.; Petrini, Serena; Andreottola, Gianni

doi:10.1016/j.heliyon.2019.e03088

Cited by 22 publications

(11 citation statements)

References 40 publications

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“…The photosynthesis process would also synthesize the new biomass of phytoplankton. As water column productivity increased, the growth from microorganisms would then consume ions from the treated IMTA water [15,16,17]. This biomass production was also related to the dynamics of turbidity in the WSP pond.…”

Section: Resultsmentioning

confidence: 99%

Nutrients removal from integrated multi-trophic aquaculture (IMTA) water using waste stabilization ponds (WSP)

Ajie

Prihatiningtyas

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Nutrients enrichment due to waste from Keramba Jaring Apung (KJA) aquaculture is one of the main causes of eutrophication in Indonesian Lakes and Reservoirs. Integrated multi-trophic aquaculture (IMTA) is one of environmentally friendly aquaculture that currently being developed at the Research Center (RC) for Limnology - National Research and Innovation Agency (BRIN). This aquaculture would re-use its water, along with fish waste and leftover fish pellets, to grow Duckweed (Lemna sp.) in its ponds system as additional feed. However, due to closed water recirculation in IMTA ponds system, the water quality would eventually deteriorate which would be marked with high turbidity of organic solid waste and low dissolved oxygen (DO). This study aims to improve water quality from aquacultures activity, especially in nutrients (nitrogen and phosphorus) reduction, using a constructed wetland (CW) system. This system consists of waste stabilization ponds (WSP) and compartments of CW and adsorbent. During this initial stage, IMTA water was treated in the WSP for then observed for its improvements in the nutrients and other water quality parameters. This research was conducted from July to September 2019 in the Prototype Laboratory of RC for Limnology-BRIN. Parameters of DO, conductivity, pH, oxidation reduction potential (ORP), and salinity were observed using a calibrated water quality checker (WQC) Horriba©, while nutrients parameters in the form of N-NH4, N-NO2, N-NO3, P-PO4, and dissolved organic matters (DOM) were measured in the laboratory referring to the standard method of the American Public Health Association (APHA). Results showed that average values of turbidity and electrical conductivity parameters were reduced from 102 to 76 NTU and 0.21 to 0.14 mS/cm, respectively. Average nutrients reductions were also found from N-NO2, N-NO3 and P-PO4 parameters of 85.5%, 44.3% and 37%, respectively. Significant changes were observed in parameters of DO and N-NH4. DO was increased from 4.63 mg/L to 7.44 mg/L, while N-NH4 were reduced for 81%. Even though the experiments were not conducted during low DO conditions of water from IMTA ponds, improvements from the vital water quality parameters after treatment in the WSP were observed.

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Section: Resultsmentioning

confidence: 99%

Nutrients removal from integrated multi-trophic aquaculture (IMTA) water using waste stabilization ponds (WSP)

Ajie

Prihatiningtyas

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…There were many possible reasons for this phenomenon, algae feeding, the algae's growth and reproduction, as well as the feed residue all would raise the TSS (Mark et al, 2018). Besides, bioflocs provided the growth environment for microalgae in the BFT system, indicating that a certain concentration of TSS could better maintain the abundance of microalgae (Foladori et al, 2020). T600 showed the fastest decrease in microalgae when feeding microalgae was stopped.…”

Section: Discussionmentioning

confidence: 99%

The effect of total suspended solids on the nursery of Penaeus vannamei nauplius based on biofloc technology system

Liu

Guo

et al. 2022

Aquaculture Research

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A 14‐day study was carried out to investigate the nursery of the nauplius (N5) Penaeus vannamei in biofloc technology (BFT) system. The whole experiment was divided into three groups: the control group (GC) without bioflocs, T300 and T600 with bioflocs in which total suspended solid (TSS) levels were maintained at 300 and 600 mg/L, respectively. The results revealed that the average total ammonia nitrogen (TAN) levels in GC were significantly higher than those in T300 and T600 (p < 0.05). By contrast, the nitrite of T300 was significantly higher than the other groups (p < 0.05). Nitrate and total nitrogen (TN) were increased with the increasing TSS, whereas alkalinity and pH decreased. The higher dry weight was detected in T300, and the survival rate under salinity stress was also significantly higher than the T600 (p < 0.05). Besides, there was no significant difference in the total Vibrio bacteria (TVB) and body length of the shrimp among all groups (p > 0.05). In conclusion, BFT with the TSS level <300 mg/L can achieve better performance in P. vannamei of nauplius nursery.

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“…Several studies have shown that the photo-oxygen generated by algal biomass is sufficient enough for heterotrophic bacterial oxidation of organic matter under no-aeration conditions, and satisfactory carbon removal has been achieved [ 154 , 155 ]. However, contradicting this observation, other researchers have shown that the addition of external aeration improves the removal efficiency [ 54 ].…”

Section: Physio-chemical Factors Affecting Algal-bacterial Systemsmentioning

confidence: 99%

A comprehensive review on the use of algal-bacterial systems for wastewater treatment with emphasis on nutrient and micropollutant removal

et al. 2022

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The scarcity of water resources and environmental pollution have highlighted the need for sustainable wastewater treatment. Existing conventional treatment systems are energy-intensive and not always able to meet stringent disposal standards. Recently, algal-bacterial systems have emerged as environmentally friendly sustainable processes for wastewater treatment and resource recovery. The algal-bacterial systems work on the principle of the symbiotic relationship between algae and bacteria. This paper comprehensively discusses the most recent studies on algal-bacterial systems for wastewater treatment, factors affecting the treatment, and aspects of resource recovery from the biomass. The algal-bacterial interaction includes cell-to-cell communication, substrate exchange, and horizontal gene transfer. The quorum sensing (QS) molecules and their effects on algal–bacterial interactions are briefly discussed. The effect of the factors such as pH, temperature, C/N/P ratio, light intensity, and external aeration on the algal-bacterial systems have been discussed. An overview of the modeling aspects of algal-bacterial systems has been provided. The algal-bacterial systems have the potential for removing micropollutants because of the diverse possible interactions between algae-bacteria. The removal mechanisms of micropollutants – sorption, biodegradation, and photodegradation, have been reviewed. The harvesting methods and resource recovery aspects have been presented. The major challenges associated with algal-bacterial systems for real scale implementation and future perspectives have been discussed. Integrating wastewater treatment with the algal biorefinery concept reduces the overall waste component in a wastewater treatment system by converting the biomass into a useful product, resulting in a sustainable system that contributes to the circular bioeconomy.

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How suspended solids concentration affects nitrification rate in microalgal-bacterial photobioreactors without external aeration

Cited by 22 publications

References 40 publications

Nutrients removal from integrated multi-trophic aquaculture (IMTA) water using waste stabilization ponds (WSP)

Nutrients removal from integrated multi-trophic aquaculture (IMTA) water using waste stabilization ponds (WSP)

The effect of total suspended solids on the nursery of Penaeus vannamei nauplius based on biofloc technology system

A comprehensive review on the use of algal-bacterial systems for wastewater treatment with emphasis on nutrient and micropollutant removal

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