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tool: – Wardrobe BOD incubator with a temperature range of -10 to 50 0 C and was stabilized at 20 0 C at the test temperature – BOD Bottle 300 ml – Aerator – Measuring cup 100 ml – The glass cup 100 ml – Equipment for testing dissolved oxygen in accordance with the scale of SNI M-10-1990-F Material : ...

Transport of agricultural produce have been done a long time ago using simple tools by human power or assistance animals / livestock. Transportation equipment has now been developed in line with the needs of the community in an effort to meet their needs, despite tradisionalpun equipment is still in use. Transportation of goods in a relatively large amount must consider ...

Oxygen in the air can not be completely removed from the atmosphere, due to the presence of oxygen is necessary to keep the course of normal metabolism. Below 1-3% oxygen, many commodities were damaged. Similarly, the concentration of CO2, the tolerance limit commodity to these gases vary. Some commodities are not resistant to high CO2 concentrations. Some commodities hold at ...

In terms of chemical parameters, good water is water that is not polluted by excessive by chemical substances that are harmful to health, among others, mercury (Hg), aluminum (Al), arsenic (As), barium (Ba), iron ( Fe), fluoride (F), Calcium (Ca), acidity (pH), and other chemicals. While the microbiological parameters of water used for everyday purposes must be free of pathogenic ...

Broadly speaking, the method of washing can be divided into two parts, namely the method of soaking and spraying. 1) Immersion Method The material to be washed soaked in water with a certain time to remove impurities attached to the material. To get the maximum laundering, on this treatment can be helped by brushing or rubbing carefully so that the ...

Between the last pile and the back of the transport vehicle must be empty space. Therefore, the charge should be strengthened / fastened to prevent a shift in the rear of the vehicle during the removal process. If the load shifts, it can block air circulation and paperboard falling can be dangerous for workers to open the door in the ...