Elisandro Pires Frigo

Use of rice husk in waste cooking oil pretreatment

ABSTRACT Since industrial wastes are increasing, the development of studies to find ways for their use is urgent. Waste cooking oil is an important source for the production of biodiesel, one of the main biofuels in Brazil. However, during cooking, the oil undergoes conditions that change its properties and decrease its quality, such as its acidity value. Current research treats waste cooking oil by the adsorption process using rice husk, an agro-industrial waste, and activated carbon to compare results. The potential of the adsorbents to remove free fatty acids in waste cooking oil has been investigated by the batch technique, evaluating different operating conditions of temperature, adsorbent mass and agitation. Adsorbents were characterized by nitrogen physisorption, scanning electron microscope, energy-dispersive spectroscopy and X-ray diffraction. The maximum result obtained for activated carbon at acidity reduction was 63%, using 22.4°C, 169.64 rpm and 3.39 g of adsorbent mass. Already, using the rice husk the percentage of removal was the same, 63% using 22.4°C, 80.36 rpm and 1.61 g of adsorbent, however in shorter times. The results prove that the application of the rice husk for this purpose is advantageous, for being a low-cost material, available on a large scale and that provide results similar to activated carbon.

Cultivation of soybean with swine wastewater

This study evaluates the cultivation of soybean under the use of swine wastewater (SWW). The SWW used was diluted in water at 0, 25, 50 and 75%. At 15, 30 and 45 days after sowing, plant height, fresh weight, dry weight, leaf area, concentrations of NPK on leaf and productivity were determined. The results show that plant height was not affected by SWW concentrations, being higher for T1 (water only). Dilutions of SWW showed the highest values of fresh and dry weight at 25 and 75%. T2 treatment, with 25% of dilution, responded better to the leaf area parameter. The average values for the levels of NPK in the leaves of soybean with application of SWW diluted in concentrations of 25, 50 and 75% were below those recommended. Treatments T4 and T3 showed higher productivity; an increase of 16% compared to control.

Salubridade ambiental do município de Missal – PR

O indicador de salubridade ambiental - ISA e um instrumento de caracterizacao e planejamento de politicas publicas, visando a melhoria da qualidade da vida populacional atraves da quantificacao e da qualificacao da salubridade ambiental de um municipio, bairros ou de uma determinada regiao. A Metodologia do ISA foi desenvolvida em 1999 pela Câmara Tecnica de Planejamento do Conselho Estadual de Saneamento no Estado de Sao Paulo – Conesan, sendo a mesma aplicada ao municipio de Missal cujo o calculo realizado pela media ponderada de indicadores especificos, determinaram um resultado de salubridade satisfatorio de media 85,42 para o municipio estudado.

Município de Céu Azul e Sua Salubridade Ambiental

Com o Indicador de Salubridade Ambiental e possivel verificar quais as medidas necessarias para aprimorar os servicos pubicos do Municipio, podendo citar dentre tais servicos o abastecimento de agua, esgoto sanitario, residuos, controle de vetores e recursos hidricos. Se os mesmos tiverem um bom desempenho nestes servicos e possivel afirmar que o municipio e salubre para sua populacao, o Municipio de Ceu Azul – PR, de acordo com o estudo realizado, obteve-se o valor de 81,76 em seu Indicador de Salubridade Ambiental – ISA (em um maximo de 100), sendo classificado como salubre.