Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia

Settlement ponds are used to remove particulate and dissolved nutrients in Australian land-based aquaculture wastewater. At best, marine and brackish water settlement ponds reduce total suspended solids by 60%, but their efficiency is inconsistent. Functional improvements to nutrient removal systems...

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Autores principales:	SA Castine, AD McKinnon, NA Paul, LA Trott, R de Nys
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2013
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/08a49a6b0d6e416ab3d6267fa458eb9b
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spelling	oai:doaj.org-article:08a49a6b0d6e416ab3d6267fa458eb9b2021-11-17T10:06:46ZWastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia1869-215X1869-753410.3354/aei00088https://doaj.org/article/08a49a6b0d6e416ab3d6267fa458eb9b2013-12-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v4/n3/p285-300/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Settlement ponds are used to remove particulate and dissolved nutrients in Australian land-based aquaculture wastewater. At best, marine and brackish water settlement ponds reduce total suspended solids by 60%, but their efficiency is inconsistent. Functional improvements to nutrient removal systems are essential to provide uniform and predictable treatment of flow-through aquaculture wastewater. Furthermore, environmental regulation of discharge from intensive systems in Australia is increasing, providing the impetus to upgrade rudimentary single-step settlement pond systems. We characterise technologies used for land-based aquaculture wastewater treatment prior to discharge from shrimp systems in Australia. We identify opportunities to integrate technologies developed for the treatment of municipal wastewaters and intensive recirculating aquaculture systems, and use these to develop a model system for intensive shrimp farm wastewater. The first stage is the reduction of solids through the use of deep anaerobic ponds, which are tailored to dilute saline wastewater. Non-settled colloidal and supracolloidal solids can subsequently be removed through trapping in a sand bed filter and biological transformation to dissolved inorganic nitrogen or N2. The resulting dissolved nutrients can be treated in a 3-stage algal treatment system by assimilation into harvestable biomass, and finally constructed wetlands polish wastewater through further trapping of particulates, and transformation of dissolved nitrogen. Given that upgrading wastewater treatment facilities is costly, we highlight options that have the potential to offset nutrient treatment costs, such as the use of algal biomass for food or energy products, and the recycling of nitrogen and phosphorus via pyrolysis creating products such as biochar and biofuel.SA CastineAD McKinnonNA PaulLA TrottR de NysInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 4, Iss 3, Pp 285-300 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 SA Castine AD McKinnon NA Paul LA Trott R de Nys Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia
description	Settlement ponds are used to remove particulate and dissolved nutrients in Australian land-based aquaculture wastewater. At best, marine and brackish water settlement ponds reduce total suspended solids by 60%, but their efficiency is inconsistent. Functional improvements to nutrient removal systems are essential to provide uniform and predictable treatment of flow-through aquaculture wastewater. Furthermore, environmental regulation of discharge from intensive systems in Australia is increasing, providing the impetus to upgrade rudimentary single-step settlement pond systems. We characterise technologies used for land-based aquaculture wastewater treatment prior to discharge from shrimp systems in Australia. We identify opportunities to integrate technologies developed for the treatment of municipal wastewaters and intensive recirculating aquaculture systems, and use these to develop a model system for intensive shrimp farm wastewater. The first stage is the reduction of solids through the use of deep anaerobic ponds, which are tailored to dilute saline wastewater. Non-settled colloidal and supracolloidal solids can subsequently be removed through trapping in a sand bed filter and biological transformation to dissolved inorganic nitrogen or N2. The resulting dissolved nutrients can be treated in a 3-stage algal treatment system by assimilation into harvestable biomass, and finally constructed wetlands polish wastewater through further trapping of particulates, and transformation of dissolved nitrogen. Given that upgrading wastewater treatment facilities is costly, we highlight options that have the potential to offset nutrient treatment costs, such as the use of algal biomass for food or energy products, and the recycling of nitrogen and phosphorus via pyrolysis creating products such as biochar and biofuel.
format	article
author	SA Castine AD McKinnon NA Paul LA Trott R de Nys
author_facet	SA Castine AD McKinnon NA Paul LA Trott R de Nys
author_sort	SA Castine
title	Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia
title_short	Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia
title_full	Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia
title_fullStr	Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia
title_full_unstemmed	Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia
title_sort	wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from australia
publisher	Inter-Research
publishDate	2013
url	https://doaj.org/article/08a49a6b0d6e416ab3d6267fa458eb9b
work_keys_str_mv	AT sacastine wastewatertreatmentforlandbasedaquacultureimprovementsandvalueaddingalternativesinmodelsystemsfromaustralia AT admckinnon wastewatertreatmentforlandbasedaquacultureimprovementsandvalueaddingalternativesinmodelsystemsfromaustralia AT napaul wastewatertreatmentforlandbasedaquacultureimprovementsandvalueaddingalternativesinmodelsystemsfromaustralia AT latrott wastewatertreatmentforlandbasedaquacultureimprovementsandvalueaddingalternativesinmodelsystemsfromaustralia AT rdenys wastewatertreatmentforlandbasedaquacultureimprovementsandvalueaddingalternativesinmodelsystemsfromaustralia
_version_	1718425589140946944

Wastewater treatment for land-based aquaculture: improvements and value-adding alternatives in model systems from Australia

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