COLOMBO (EconomyNext) – Sri Lanka’s Adam Investments said it is upgrading its activated carbon factory and aims to resume production shortly with carbonisation and recycling technology that produces higher yields and saves cost.
A total of 151 million rupees in bank debt of Bieco Link Carbons, the activated carbon factory renamed Adam Carbons, due at the time the unit was acquired last year with the takever of PCH Holdings, was settled in full, the company said.
A complete plant upgrade is being done with full refurbishment of one vertical kiln, one rotary kiln, three carbonizers and laboratory along with required modifications with production planned to start in mid 2015, its annual report revealed.
The highly porous structure of activated carbon, produced by steam activation of coconut shell charcoal, is used to remove impurities in air and water.
“At present renovation and testing of the 12 acre plant of Bieco Link Carbons is being completed which will give your company the second largest manufacturing capacity of granulated activated carbon in Sri Lanka,” chairman Ali Asger Shabbir Gulamhusein told shareholders.
The carbons factory in Giriulla, in the North Western province ‘coconut belt’, is only plant in Sri Lanka using both vertical and rotary kiln technologies in the steam activation process, he said.
The throughput of its rotary kilns has been increased to 3.75 -4.00 metric tonnes a day compared to the standard 2.5 – 2.8 MT per day from similar sized kilns, the report said.
“The previous practice of using furnace oil as a heating source for steam activation has also been eliminated saving about 30 million rupees per annum.”
The firm is using carbonizer technology with energy recovery for steam production for which it aims to obtain intellectual property rights to develop it further.
The process uses volatile gases emanating during carbonization (charcoal production) as an energy source to raise steam which is required for the activation process, and also eliminates the air pollution.
The activation process yield of its two vertical activation kilns is about 45-46 percent compared to 40 percent yield from rotary kilns in producing the medium activity activated carbon, the report said.
“The throughput of activated carbon is also high, approximately six metric tonnes per kiln per day. Additionally there is almost zero percentage of particle breakdowns during production, making particle size recovery very high.”