Production and Use of Birch Activated Carbon for Drinking Water Post-Treatment
DOI:
https://doi.org/10.37482/0536-1036-2020-3-169-175Keywords:
drinking water post-treatment, oxidability, sorption, activated carbon, smalldiameter birch woodAbstract
Pyrolysis of low-quality deciduous wood in the plants with low environmental hazard, located near the source of raw materials is one of the promising options for its processing. In the future, it will be possible to convert such charcoal into activated carbons for various purposes. The research purpose is to evaluate the usefulness of activated carbon derived from smalldiameter birch wood for the drinking water post-treatment, as well as to show the possibility of its regeneration. Commercial activated carbon BAU-A and crushed activated charcoal, obtained by steam activation of coal made of small-diameter birch wood in a rotary kiln with a z-shaped insert, were used as a filter medium in the columns. Water was supplied to the columns with activated carbon in such a way as to ensure the contact duration of water with coal for 8, 4, and 2 min. After three months of continuous operation, all carbon filters with 8-minute contact time retained sorption activity, and filters with 4-minute contact time were used for 80 %. Further on, water post-treatment tests were carried out with recovered carbons. It is found that post-treatment using birch activated carbon reduces the water permanganate oxidation by about 1 mg O2/dm3. The most complementary preferred contact time of coal charge with water is 4 min. The coal after regeneration is recyclable. It is shown that coal made of small-diameter birch wood using activation in a kiln with a z-shaped insert reduces the water oxidation in the same way as commercial coal BAU-A. Herewith, the use of cheaper raw materials (fine birch wood) and coal activation with low specific consumption of water steam (due to the organization of oscillating pressure) cut costs for the filter medium production and drinking water post-treatment.
For citation: Yur’ev Yu.L. Production and Use of Birch Activated Carbon for Drinking Water Post-Treatment. Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 3, pp. 169–175. DOI: 10.37482/0536-1036-2020-3-169-175
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