Characterization of dairy waste streams, current treatment practices, and potential for biological nutrient removal

Danalewich, J.R.; Papagiannis, T. G.; Belyea, Ronald L.; Tumbleson, Mike E; Raskin, Lutgarde

doi:10.1016/s0043-1354(98)00160-2

Cited by 153 publications

(78 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The degradation of environment results by the adverse effect of industrial waste on living organism and agriculture (Danalewich et al, 1998). Keeping all these points into consideration the study has been done to study physico -chemical properties of wastewater generated from dairy industry.…”

Section: Introductionmentioning

confidence: 99%

Physico-Chemical Analysis of Dairy Industrial Effluent

Verma¹,

Singh²

2017

Int.J.Curr.Microbiol.App.Sci

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Physico-Chemical Analysis of Dairy Industrial Effluent

Verma¹,

Singh²

2017

Int.J.Curr.Microbiol.App.Sci

View full text Add to dashboard Cite

“…A remoção de sólidos dissolvidos é realizada por processos biológicos 8 . Os processos biológicos dividem-se em aeróbios e anaeróbios 9 . Os sistemas biológicos de tratamento de resíduos devem atender alguns aspectos importantes: (1) remoção da matéria orgânica, portanto redução da Demanda Bioquímica de Oxigênio (DBO) do resíduo a ser tratado; (2) se possível, degradação de compostos químicos orgânicos de difícil degradação (recalcitrantes); (3) fornecimento de um efluente em condições que não afete o equilíbrio do sistema receptor final (rios e lagos).…”

Section: Tratamento De Efluentesunclassified

Aplicação de lipases no tratamento de águas residuárias com elevados teores de lipídeos

Mendes¹,

Castro²,

Pereira³

et al. 2005

Quím. Nova

View full text Add to dashboard Cite

Recebido em 12/12/03; aceito em 14/9/04; publicado na web em 4/2/05 APPLICATION OF LIPASES FOR WASTEWATER TREATMENT CONTAINING HIGH LEVELS OF LIPIDS. The process of anaerobic digestion has been greatly developed during the last decades for the treatment of wastewater from food industries as for example, wastewaters from sugar and starch manufacturing and from breweries. However, for wastewaters which contain high amounts of fats and proteins, such as those from slaughterhouses and dairies, anaerobic digestion was found to be troublesome, due to the potential of sludge flotation, the formation of scum layers of lipids at the surface of the reactor, which are not digested and the toxicity of the intermediate compounds (long chain fatty acids) generated during the anaerobic digestion of the wastewater. The addition of hydrolytic enzymes, such as lipases prior to the anaerobic digestion can minimize these problems. In this work, this strategy is reviewed and the technical issues that must be considered in determining its feasibility are discussed.Keywords: wastewater; lipids; lipase and enzymatic treatment. INTRODUÇÃOA adoção de um maior rigor nos padrões de descarte de águas residuárias tem motivado a realização de pesquisas, cujo objetivo é reduzir o impacto ambiental, especialmente em efluentes contendo elevados teores de lipídeos, como os provenientes de laticínios, matadouros e avícolas, enlatados, extração de óleos, entre outros. A Política Nacional de Recursos Hídricos, instituída pela Lei Federal n° 9.433 de 8 de janeiro de 1997 trata da cobrança pelo uso dos corpos d'água para o lançamento de despejos líquidos.Os lipídeos contidos nesses efluentes, além de representarem uma perda industrial importante, interferem negativamente nos Sistemas de Tratamento de Efluentes. Elevadas concentrações de lipídeos resultam na formação de lodos com diferentes características físicas e reduzida atividade hidrolítica devido à flotação dessa biomassa, aumento do tempo de retenção hidráulica desses efluentes nas lagoas de estabilização, redução da capacidade de aeradores e elevada demanda de produtos floculantes 1 . Dentro deste contexto, processos alternativos vêm sendo utilizados na redução da concentração de lipídeos contidos nesses efluentes por meio de ação de enzimas, particularmente lipases. Essas enzimas apresentam uma importância particular, pelo fato de hidrolisarem especificamente óleos e gorduras, o que pode ser de grande interesse para o tratamento de efluentes com alto teor de gordura. As lipases (triacilglicerol acil hidrolases, E.C.3.1.1.3) compreendem um grupo de enzimas hidrolíticas que atuam na interface orgânica-aquosa, catalisando a hidrólise de ligações éster-carboxílicas, presentes em acilgliceróis 2 . A sua utilização reduz os níveis de sólidos suspensos e lipídeos, o que possibilita melhores condições de operação no tratamento anaeróbio e desobstrui filmes de óleos em tubulações, resultando no aumento da vida útil dos equipamentos.Além disso, esse tratamento apresenta algumas vantagens, tais como a e...

show abstract

“…from the washing processes. The quality of wastewater generated in a dairy is determined by the type of production, content of raw material and technological advances of the plant [4][5][6]. Dairy wastewater temperature is usually 20-30°C and is characterized by weak alkaline reaction (pH 7-8.8).…”

Section: Introductionmentioning

confidence: 99%

“…During methane fermentation, around 3 to 20 times more excess sludge is generated compared to aerobic processes, which is connected with low rate of increase of aerobic bacteria. In the case of anaerobic treatment, nearly 1 kg of removed COD generates the energy of 3.4 kWh and it is estimated that 1kg of decomposed organic matter can be used to obtain 0.35 m³ methane [6][7][8][9]. The benefit of methane fermentation is the ability to decompose fats and suspensions contained in the wastewater.…”

Section: Introductionmentioning

confidence: 99%

Treatment of dairy wastewater in UASB-UF system

Kwarciak‐Kozłowska

Bień

2018

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. The examinations concerned determination of the treatment efficiency of wastewater form dairy industry using the system which combines methane fermentation with ultrafiltration process. The study attempted to determine the effect of HRT and OLR on the degree of biodegradation of contaminants contained in the sludge examined and on the quality and amount of biogas. The anaerobic process obtained a considerable degree of the removal of organic pollutants from raw wastewater designated as COD (73.8%), BOD (81.2%) and TOC (76%). The concentrations of COD and BOD were 1053 mg/dm 3 and 329 mg/dm 3 , respectively. The value of TOC reached a level of 288 mg/dm 3 . Generated biogas in the methane fermentation process of wastewater from dairy wastewater was characterized by high methane content (82 % vol.). In the final part of the experiment, the UF process was used in order to posttreating effluent from UASB reactor. During the UF process, COD, BOD and TOC parameters were removed at 72%, 63% and 67%, respectively.

show abstract

Characterization of dairy waste streams, current treatment practices, and potential for biological nutrient removal

Cited by 153 publications

References 28 publications

Physico-Chemical Analysis of Dairy Industrial Effluent

Physico-Chemical Analysis of Dairy Industrial Effluent

Aplicação de lipases no tratamento de águas residuárias com elevados teores de lipídeos

Treatment of dairy wastewater in UASB-UF system

Contact Info

Product

Resources

About