Integrated treatment of farm effluents in New Zealand’s dairy operations

Bolan, Nanthi; Laurenson, Seth; Luo, Jiafa; Sukias, J.P.S.

doi:10.1016/j.biortech.2009.03.004

Cited by 39 publications

(26 citation statements)

References 41 publications

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“…Among the low-cost technologies, landfilling has been the most popular and widely followed technology for its convenience in handling and easy maintenance [12]. However, long-term discharge of effluents builds up the levels of nutrients, organic matter and heavy metals posing different kind of threat in terms of land degradation and pollution of surface and underground water resources.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Abattoir Waste-Water Irrigation on Soil Fertility and Productivity

Matheyarasu¹,

Seshadri²,

Bolan³

et al. 2015

Irrigation and Drainage - Sustainable Strategies and Systems

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Section: Introductionmentioning

confidence: 99%

Impacts of Abattoir Waste-Water Irrigation on Soil Fertility and Productivity

Matheyarasu¹,

Seshadri²,

Bolan³

et al. 2015

Irrigation and Drainage - Sustainable Strategies and Systems

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“…[4] In New Zealand, a two-pond system consisting of an anaerobic pond and a subsequent aerobic pond is the traditionally employed method for biological treatment of dairy effluent, which is effective for the removal of suspended solids, COD, and BOD. [5] However, it has a limited capacity for phosphate removal, typically resulting in alkaline effluent (pH ∼ 0) with an average phosphate concentration of 21 mg L −1 . Land application of dairy effluent (treated or untreated) is increasingly popular for the recovery of valuable minerals, organic * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Utilizing acid mine drainage sludge and coal fly ash for phosphate removal from dairy wastewater

Wang

Tsang

Olds

et al. 2013

Environmental Technology

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This study aims to investigate a new and sustainable approach for the reuse of industrial by-products from wastewater treatment. The dairy industry produces huge volumes of wastewater, characterized by high levels of phosphate that can result in eutrophication and degradation of aquatic ecosystems. This study evaluated the application of acid mine drainage (AMD) sludge, coal fly ash, and lignite as low-cost adsorbents for the removal of phosphate from dairy wastewater. Material characterization using X-ray fluorescence, X-ray diffraction, and Brunauer-Emmett-Teller surface area analysis revealed significant amounts of crystalline/amorphous Fe/Al/Si/Ca-based minerals and large surface areas of AMD sludge and fly ash. Batch adsorption isotherms were best described using the Freundlich model. The Freundlich distribution coefficients were 13.7 mg(0.577) L(0.423) g(-1) and 16.9 mg(0.478) L(0.522) g(-1) for AMD sludge and fly ash, respectively, and the nonlinearity constants suggested favourable adsorption for column applications. The breakthrough curves of fixed-bed columns, containing greater than 10 wt% of the waste materials (individual or composite blends) mixed with sand, indicated that phosphate breakthrough did not occur within 100 pore volumes while the cumulative removal was 522 and 490 mg kg(-1) at 10 wt% AMD sludge and 10 wt% fly ash, respectively. By contrast, lignite exhibited negligible phosphate adsorption, possibly due to small amounts of inorganic minerals suitable for phosphate complexation and limited surface area. The results suggest that both AMD sludge and fly ash were potentially effective adsorbents if employed individually at a ratio of 10 wt% or above for column application.

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“…Reducing dissolved nutrient concentration in any type of wastewater using rudimentary single-step settlement pond technology presents a significant challenge because ponds are not optimised for the assimilation of nutrients through algal growth and harvest, or for transformation by beneficial microbial pathways (Craggs et al 1996, Bolan et al 2009). However, 3 types of processes can be transferred from MWW and IRAWW treatment to improve the removal of dissolved nutrients from LBAWW.…”

Section: Removing Dissolved Nutrientsmentioning

confidence: 99%

“…Craggs et al (2004a) overcame the fundamental issue of high dissolved nutrient content in dairy farm wastewater by upgrading a traditional 2-stage treatment pond system to a 4-stage pond system. Two-pond freshwater systems (primary and secondary treatment) consisting of a deep anaerobic settling basin and a shallower facultative pond, were traditionally recommended as they were effective in remediating biochemical oxygen demand, carbon and TSS in dairy farm wastewater (Bolan et al 2009). However, they were not optimised for dissolved nutrient removal, and the upgrade to a multi-stage pond system increased NH 4 + removal by 37% and TSS removal by 44% (see Fig.…”

Section: Removing Dissolved Nutrientsmentioning

confidence: 99%

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

Castine¹,

McKinnon²,

Paul³

et al. 2013

Aquacult. Environ. Interact.

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Land-based aquaculture is an integral part of global aquaculture production for fishes (28.8 million t), molluscs (13.1 million t) and crustaceans (5.0 million t; FAO 2010, Hall et al. 2011. The majority of landbased systems which support the intensive culture of fresh, brackish and marine water organisms do so through the addition of high-protein feeds to sustain the rapid growth of intensively farmed animals ABSTRACT: 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 singlestep 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 N 2 . 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.

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Integrated treatment of farm effluents in New Zealand’s dairy operations

Cited by 39 publications

References 41 publications

Impacts of Abattoir Waste-Water Irrigation on Soil Fertility and Productivity

Impacts of Abattoir Waste-Water Irrigation on Soil Fertility and Productivity

Utilizing acid mine drainage sludge and coal fly ash for phosphate removal from dairy wastewater

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

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