Development of a second-generation environmentally superior technology for treatment of swine manure in the USA

Vanotti, Matías B.; Szögi, Ariel A.; Millner, Patricia D.; Loughrin, John H.

doi:10.1016/j.biortech.2009.02.019

Cited by 81 publications

(63 citation statements)

References 19 publications

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“…In this case, the molar ratio of Ca:P did not change significantly at both pH conditions. The high TP and SP removal efficiency as well as the Ca(OH) 2 consumption was consistent with other reported values for similar treatments (after buffer reduction with biological treatment) applied to livestock effluents [21,24,25]. Variations in Ca(OH) 2 consumption and phosphorus removal efficiency are caused by the presence of NH + 4 and CO 2− 3 in the effluent [20,26].…”

Section: Phosphorus Removalsupporting

confidence: 91%

Chemical phosphorus removal: a clean strategy for piggery wastewater management in Brazil

Fernandes

Kunz

Steinmetz

et al. 2012

Environmental Technology

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The intensive production of animal protein is known to be an environmental polluting activity, especially if the wastewater produced is not managed properly. Swine production in Brazil is growing, and technologies to manage all pollutants present in the wastewater effluent are needed. This work presents a case of study of phosphorus (P) removal from piggery wastewater using Ca(OH)2, and demonstrates the feasibility of this strategy for P management. The effluent of a swine manure treatment plant was treated with Ca(OH)2. According to the addition of Ca(OH)2 the pH of the effluent ranged from 8.0 to 10.0. Different conditions of sludge dewatering were evaluated, and the chemical composition of sludge was investigated. Ion chromatography analysis of effluent samples showed that 92% of total P (TP) was present as soluble P (SP) whereas 75% of SP species were present as phosphate. The efficiency of P removal was typically 90% at pH 8.5 and higher than 98% at pH 10.5. The sludge was separated by sedimentation, centrifugation or filtration and dried. The TP content of dried sludge was 9.3% (w/w). X-ray diffraction analysis of the dry sludge showed the presence of amorphous compounds of Ca and P, which is an indication that the sludge obtained from the swine manure treatment has a potential for application as biofertilizer.

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Section: Phosphorus Removalsupporting

confidence: 91%

Chemical phosphorus removal: a clean strategy for piggery wastewater management in Brazil

Fernandes

Kunz

Steinmetz

et al. 2012

Environmental Technology

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“…Finally, in Case 1, the NDN plant destroyed Salmonella and reduced E. coli by 2.2 log 10 , although the treatment was less efficient in reducing this pathogen (Table 2). Similar results were obtained by Vanotti et al (2009), recording a pathogen reduction of 2.6 log 10 in the biological N treatment.…”

Section: Pathogen Reductionsupporting

confidence: 86%

“…Moreover, decreasing the organic carbon contained in the liquid fraction reduced aeration requirements in the subsequent NDN reactor, since oxygen was used more efficiently to convert NH 4 + -N into NO 3 --N rather than being used to break down organic compounds. The financial cost of the overall system was thus reduced (Vanotti et al, 2009). Finally, implementing the aerobic treatment for manure management led to a total annual greenhouse gas (GHG) emission reduction of approximately 65 % (Figure 9).…”

Section: Resultsmentioning

confidence: 99%

Treatment of swine manure: case studies in European’s N-surplus areas

García-González

Riaño

Teresa³

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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“…Os resultados DQO (Figura 4A) do efluente bruto, entrada e saída do flotodecantador no período pré otimização, demonstraram 46% de remoção sendo que, após a otimização em laboratório, esta eficiência aumentou para 58%. Referido incremento da eficiência também está associado à melhora do processo de separação sólido-líquido, via melhora da característica de formação e sedimentabilidade dos flocos, grandes e bem definidos, resultando em maior eficiência na remoção de DQO haja vista que a matriz estudada possuía elevada concentração de DQO solúvel (Vanotti et al, 2009). …”

Section: Resultsunclassified

Separação sólido-líquido em efluentes da suinocultura

Kunz

Steinmetz

Bortoli

2010

Rev. bras. eng. agríc. ambient.

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RESUMOA produção de suínos vem aumentando muito no Brasil e a contribuição da suinocultura industrial, que se baseia nos Sistemas de Produção de Animais Confinados (SPACs), tem sido cada vez mais representativa. Na região Oeste de Santa Catarina o crescente aumento da densidade de animais está associado a um passivo ambiental de grandes proporções, principalmente em virtude dos efluentes da produção dos suínos possuírem uma matriz com altas concentrações de matéria orgânica e nutrientes. São inúmeras as alternativas de processos através dos quais se pode realizar o tratamento dos dejetos de suínos: físicos, físico-químicos e biológicos; esses processos podem ser empregados de forma conjunta e sequencial. Neste trabalho se estudou um processo de separação sólido-líquido, baseado no uso de um extrato natural de taninos para a coagulação e floculação de dejeto de suínos com posterior separação gravimétrica em flotodecantador. Realizou-se a comparação da eficiência de remoção de sólidos e de nutrientes em períodos distintos, antes e após as otimizações. As modificações realizadas aumentaram a eficiên-cia do sistema atingindo índices de 46 a 56% de redução da Demanda Química de Oxigênio (DQO), melhor compactação do lodo e diminuição no arraste de sólidos sedimentáveis do flotodencantador. Palavras-chave: dejetos de suínos, floculação, coagulação, PAM, taninoSolid-liquid separation in pig effluents ABSTRACT Swine production is growing fast in Brazil and the contribution of the modern swine production represented by confined animal feeding operations (CAFOs), has been very important. The high animal concentration in small areas point out a very intensive environmental impact due to the concentration of organic matter and nutrients in their effluents. There are a lot of alternatives to treat swine manure: physical physico-chemical and biological treatments; these processes can be used together and sequentialy. In this paper, a solid-liquid separation process was studied based on coagulation and flocculation with tannin extracts in a settling tank, that is used as a part of a swine manure compact treatment system to treat swine manure. The process was adjusted in a laboratory scale and some modification was introduced in the full scale plant. A comparison between the pre and post adjustment process was performed. The process modification increase the COD removal from 46 to 56% and the settled solids concentration in the effluent from settling tank was also reduced.

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Development of a second-generation environmentally superior technology for treatment of swine manure in the USA

Cited by 81 publications

References 19 publications

Chemical phosphorus removal: a clean strategy for piggery wastewater management in Brazil

Chemical phosphorus removal: a clean strategy for piggery wastewater management in Brazil

Treatment of swine manure: case studies in European’s N-surplus areas

Separação sólido-líquido em efluentes da suinocultura

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