Gastropod shell column reactor as on-site system for phosphate capture and recovery from aqua system

Oladoja, N.A.; Adesina, Abiola Olanike; Adelagun, R.O.A.

doi:10.1016/j.ecoleng.2014.03.077

Cited by 12 publications

(4 citation statements)

References 48 publications

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“…This approach was adjudged to have ''green'' implications because of the inclusion of recycled material as part of the material Appl Water Sci (2017) 7:3391-3406 3399 mixture, promoting treatment efficiency and cost effectiveness (Hossain et al 2010a). The ability of a waste biogenic material, the shell of African land snail (Achatina achatina), a Gastropod, packed in a column as an on-site system for phosphate removal and recovery has been investigated (Oladoja et al 2014). The column reactor was operated in a batch-continuous mode, considered as a close approximation to a practical water treatment system, for 30 days, using synthetic phosphate-contaminated water.…”

Section: Nutrients (Ie P and N)mentioning

confidence: 99%

Appropriate technology for domestic wastewater management in under-resourced regions of the world

Oladoja

2016

Appl Water Sci

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Centralized wastewater management system is the modern day waste management practice, but the high cost and stringent requirements for the construction and operation have made it less attractive in the under-resourced regions of the world. Considering these challenges, the use of decentralized wastewater management system, on-site treatment system, as an appropriate technology for domestic wastewater treatment is hereby advocated. Adopting this technology helps save money, protects home owners' investment, promotes better watershed management, offers an appropriate solution for low-density communities, provides suitable alternatives for varying site conditions and furnishes effective solutions for ecologically sensitive areas. In the light of this, an overview of the on-site treatment scheme, at the laboratory scale, pilot study stage, and field trials was conducted to highlight the operational principles' strength and shortcomings of the scheme. The operational requirements for the establishing and operation of the scheme and best management practice to enhance the performance and sustenance were proffered.

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Section: Nutrients (Ie P and N)mentioning

confidence: 99%

Appropriate technology for domestic wastewater management in under-resourced regions of the world

Oladoja

2016

Appl Water Sci

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“…GS was also observed to be effective in the removal of dissolve solids, suspended solid and total solids, it was also noted that the concentration of nitrate reduced from a value of 12.8 mg/L in the 1 st day to a value of 7.9 mg/L in the 30 th day, in a similar manner the value of COD was reduced from 80 mg/L to 33 mg/L in the 30 th day. GS has also been effective in defluorination of groundwater [39,40]. The use of Al2(SO4)3 as a primary coagulant and snail shell as a coagulant aid in the treatment of malachite green dye and aniline blue dye contaminated wastewater has revealed that the use of aluminum sulfate unaided has no coagulating effect on the malachite green wastewater but the use of snail shell reduce the aqua dye concentration.…”

Section: Organic Polymeric Coagulantsmentioning

confidence: 99%

“…Aluminum based coagulants has been strongly linked to the development Alzheimer's disease in humans. The demerits of chemical and electrocoagulation have necessitated the development of cost effective and ecofriendly green bio-based coagulants in order to counteract the aforementioned demerits [29,39,40,54,55,[58][59][60].…”

Section: Organic-inorganic Coagulant (Alcat and Fercat)mentioning

confidence: 99%

Chemical coagulation and biological techniques for wastewater treatment

Akinnawo

Ayadi

Oluwalope

2023

Ovidius University Annals of Chemistry

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This paper reports the effectiveness of chemical coagulation and biological techniques for the treatment of wastewater from industrial and agricultural operations. Agricultural husbandry has been reported to produce wastewater that has high content of chemical oxygen demand (COD), biological oxygen demand (BOD), turbidity as well as organic and inorganic pollutants. A comparison on the use of organic and inorganic based coagulants as well as the optimum conditions required for high percentage removal efficiency of pollutants from wastewater has been reviewed. At optimum experimental condition, ferric chloride coagulants were reported to yield 98, 95, 93 and 50 % removal of color, turbidity, iron and manganese. Moreover, chemical coagulation, electrocoagulation and biological methods have been reported to display a close range in their capacities for removing pollutants from wastewater. However, biological method was observed to be highly effective in the removal of pollutants from wastewater but requires more time and produces lesser volume of sludge, when compared to chemical method in the treatment of wastewater.

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“…Calcium -rich materials are preferably used as sorbent for P recovery: the sludges produced could be readily assessed as slow release fertilizer (hydroxyapatite and whitlockite). Premised on a high P removal efficiency (.> 90%) from a synthetic P feed wastewater in a batch system and column reactor achieved in our laboratory using gastropod shell [17,18], this studied is proposed at using calcined gastropod shell for P recovery from aquaculture wastewater. Gastropods live in every conceivable habitat on earth.…”

Section: Introductionmentioning

confidence: 99%

Nutrients Recovery From Aquaculture Wastewater Using Thermally Treated Gastropod Shells

Ajoke¹

2018

AJC

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Various technological options are currently being assessed towards phosphorus recovery from waste streams. Premised on the development of sustainable appropriate technology, gastropod shell was thermally modified in this study to enhance its sorption capacity as a substrate material for P recovery from aquaculture used water. It was revealed that the thermal treatment impacted enhanced defects in the surficial morphologies of the gastropod shell leading to an increased P recovery efficiency; this was contrary to the general view that high P recovery efficiency of calcined calcium – rich materials was as a result of conversion of CaCO3 to CaO. Furthermore, about 60% P recovery was obtained and a substantial recovery of the total Nitrogen was also achieved. There was a significant improvement in the overall characteristics of the treated used water for safe disposal or reuse.

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Gastropod shell column reactor as on-site system for phosphate capture and recovery from aqua system

Cited by 12 publications

References 48 publications

Appropriate technology for domestic wastewater management in under-resourced regions of the world

Appropriate technology for domestic wastewater management in under-resourced regions of the world

Chemical coagulation and biological techniques for wastewater treatment

Nutrients Recovery From Aquaculture Wastewater Using Thermally Treated Gastropod Shells

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