Survival of faecal coliforms in four different types of sludge-amended soils in Botswana

Ngole, V. M.; Mpuchane, S.; Totolo, Otlogetswe

doi:10.1016/j.ejsobi.2006.03.004

Cited by 22 publications

(21 citation statements)

References 12 publications

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“…Topp et al (2003) studied the relationship between soil moisture and content of E. coli bacteria and showed that elevating moisture level contributed to increasing the number of these bacteria in the soil in early spring. Similarly, Ngole et al (2006) confirmed the impact of moisture and temperature on survival of coliforms. Microbial contamination of soil throughout the entire research period was low, as evidenced by the titer coli value being ≤0.01.…”

Section: Resultssupporting

confidence: 57%

“…Otherwise, a large load of pathogenic bacteria and viruses can be introduced to the soil, posing a major epidemiological threat (Amin et al, 2013). Microorganism survival in the soil environment is favored by high temperature and moisture (Boes et al, 2005;Ngole et al, 2006). According to Petkov et al (2006), application of manure storage piles obtained from infected animals often results in soil contamination with pathogenic microorganisms.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of microbial contamination of feces and soil on a laying-hen farm depending on sampling site and season

Trawińska

Chmielowiec-Korzeniowska

Nowakowicz-Dębek

et al. 2016

R. Bras. Zootec.

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-The objective of the present study was to evaluate soil collected from a laying-hen farm and bird manure according to the season of the year and sampling site. Soil samples were taken at the poultry facility wall and at the distances of 15 m and 45 m from the building. Bird feces samples were collected inside the poultry house at the entrance and at ¼ and ½ length of the building. Soil and bird feces samples were evaluated by bacteriological qualitative and quantitative analyses. The largest bacterial load was determined in the samples taken at the poultry facility wall in December/January. Soil microbial contamination degree was low. The highest bacterial count in bird manure was found in the samples collected at ½ length of the hen house at the end of December/January. The qualitative study of bird feces showed the presence of E. coli bacteria all through the research period and Enterobacter spp. in the samples taken from July until September. Microbial contamination of soil environment and bird feces is most likely to be affected by winter period as at that time the highest microbial population can be determined. This fact may be linked to the prevailing climatic and microclimatic conditions.

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Section: Resultssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Evaluation of microbial contamination of feces and soil on a laying-hen farm depending on sampling site and season

Trawińska

Chmielowiec-Korzeniowska

Nowakowicz-Dębek

et al. 2016

R. Bras. Zootec.

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“…[13][14][15][16][17][18] Os resíduos de esgotos gerados após tratamento são constituídos essencialmente de água com a presença de minerais e MO suspensa ou dissolvida. Entretanto, em alguns casos, a quantidade relativamente grande de nutrientes, como fosfatos, nitratos e amônio, favorece a eutrofização de corpos de água, comprometendo a qualidade das águas superficiais e limitando a disposição do efluente tratado no local.…”

Section: Introductionunclassified

Avaliação físico-química de efluente gerado em biodigestor anaeróbio para fins de avaliação de eficiência e aplicação como fertilizante agrícola

Silva¹,

Novaes²,

Kuroki³

et al. 2012

Quím. Nova

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Recebido em 20/12/10; aceito em 6/6/11; publicado na web em 22/7/11 PHYSICO-CHEMICAL EVALUATION OF AN EFFLUENT TREATED IN ANAEROBIC BIODIGESTER REGARDING ITS EFFICIENCE AND APPLICATION AS FERTILIZER. The use of biodigester for basic and environmental sanitation has large demand in Brazil. A biodigester was built to treat conjunctly the human and pig feces and urine, regarding to its future application in rural small towns. The results show that the biodigester can reduce 90% of COD and BOD and, up to 99.99% of thermotolerant coliforms. The treated effluent has variable quantities of macro-and micro-nutrients; and organic matter. However, the concentration variability of the nutrients makes difficult a dosed application into soil. The soluble salts (mainly as Na + form) make necessary a controlled use to avoid environmental degradation.Keywords: anaerobic biodigester; sewage treatment; fertilizer. INTRODUÇÃOA biodigestão anaeróbia é um processo microbiológico onde uma série de micro-organismos, na ausência de ar, atuam na transformação da matéria orgânica (MO) lábil, passando de moléculas mais complexas para aquelas com estruturas mais simples. Como resultado da biodigestão anaeróbia de excrementos, têm-se a produção de biogás e um efluente clarificado e mais estabilizado química e microbiologicamente. Digestores têm demonstrado consideráveis benefícios sócio-econômicos em todo o mundo. Os Estados Unidos e o Canadá têm colocado especial ênfase na pesquisa e desenvolvimento de biodigestores anaeróbios, tal qual ocorre em países emergentes como a China e a Índia, que possuem programas extensos para implementar biodigestores. 1,2 A China é o segundo maior consumidor de energia do mundo e é responsável por boa parte da liberação dos gases do efeito estufa para a atmosfera e, assim, tem investido pesadamente em projetos de proteção ambiental e na geração de energia renovável. Com a adoção desta política, o governo chinês tem estimulado substancialmente pesquisas através da construção, operação e eficiência de biodigestores. 3,4 No Brasil, estudos envolvendo o uso de biodigestores têm sido utilizados em duas principais vertentes: tratamento de efluentes e uso energético do biogás. Existe uma terceira vertente importante relacionada ao uso do efluente para melhorar a fertilidade de solo e, com isso, aumentar a sustentabilidade do sistema produtivo. 5 Sistemas biodigestores, ainda no país, são apresentados na literatura visando o tratamento de resíduos de processamento de mandioca, 6 estercos bovino e suíno, 7,8 com excelentes resultados do ponto de vista sanitário e ambiental.O uso de um sistema biodigestor no tratamento de esgoto residencial rural foi desenvolvido na Embrapa Instrumentação, apresentando excelentes resultados tanto do ponto de vista sanitário, quanto do uso do efluente na agricultura. 9,10 Segundo a FAO-ONU (Food Agricultural Organization -Organização das Nações Unidas), a agricultura de base familiar reúne 14 milhões de pessoas, mais de 60% do total de agricultores, e detém 75% dos estabelecimentos agr...

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“…The quantity of dissolved salts in soils could be determined based on electrical conductivity (EC) [38]. All the studied geophagic soil samples exhibited very high EC, indicating that the amount of dissolved salts contained in them is high.…”

Section: Electrical Conductivity (Ec)mentioning

confidence: 99%

Mineralogical Profile of Geophagic Clayey Soils Sold in Selected South African Informal Markets

2016

International Conference on Advances in Science, Engineering, Technology and Natural Resources (ICASETNR-16) Nov. 24-25, 2016 P

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Abstract-Geophagia, the intentional ingestion of clayey soil has both useful and negative health effects on humans due to the biomass, physicochemical, mineralogical and geochemical composition of the gritty material. In a few circumstances, clayey soil is viewed as a supplement to health deficiencies resulting from a less than stellar eating routine. Geophagy has been of interest to researchers and analysts due to continued habitual, religious and cultural practices by diverse communities globally in spite of reports contraindicating its purported benefits. The gritty material remains a thing of interest considering the nature in which they are obtained, transported and stored. Six geophagic clayey soil samples were obtained from chosen casual markets in South Africa. Four of these samples were originally from around South Africa and two were originally from Nigeria. The samples were analysed and characterised utilizing XRF, XRD, pH, and electrical conductivity to survey the nutritious qualities that support the continued use by mostly females and pregnant ladies in various parts of South Africa. Results of the XRD analysis revealed that the clay materials were mainly composed of kaolinite with minor palygorskite, illite, Amesite, Gupeite, Hematite and Magnetite. Quartz was the major non-clay constituent identified. Results of the XRF analysis showed average values of major elements such as SiO 2 (54.02%), Al 2 O 3 (35.45%), Fe 2 O 3 (6.73%), K 2 O (2.76%), MgO (1.16%) with MnO, Na 2 O and P 2 O 5 falling below 0.5%. Titanium was a major heavy metal identified from the samples which may result in heavy metal toxicity. The potential medicinal application of these clayey soils is supported by their kaolinite contents; in contrast the trace elements are pointers of probable adverse effects on humans.

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Survival of faecal coliforms in four different types of sludge-amended soils in Botswana

Cited by 22 publications

References 12 publications

Evaluation of microbial contamination of feces and soil on a laying-hen farm depending on sampling site and season

Evaluation of microbial contamination of feces and soil on a laying-hen farm depending on sampling site and season

Avaliação físico-química de efluente gerado em biodigestor anaeróbio para fins de avaliação de eficiência e aplicação como fertilizante agrícola

Mineralogical Profile of Geophagic Clayey Soils Sold in Selected South African Informal Markets

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