Zinc percipitation using sulfate reducing bacteria (SRB) in anaerobic column system

Abstract

Most existing physical and chemical treatment technologies for zine are stationary. They required space and time to construct with high operating and miaintenance cost. Stationary treatment plant would not be able to work effectively in the remote area due to the lack of resources to maintain the full efficiency. This research was conducted to find the possibility to vercome the problem of treatment of zinc contaminated wastewater in the remote area. An idea on the use of portable or mobile treatment system was selected as the solution of the problems as it will provide the advantages of mobility, cost effectiveness and ease of operation. In this thesis, two reactors were constructed. Both reactors were added with the mixture matrix containing; stone, wood chips and 200 mL of anaerobic digested sludge. The different between the two reactor was that, reactor A were filled to the full capacity with deionized water and reactor B was filled to the full capacity with water from filtered anaerobic digested sludge after loaded with mixture matrix. After the startup period of 31 days, both reactors showed suitable conditions for zine treatment. The efficiency of zinc treament. The efficiency of zine treatment after the first addition of zince in reactor A and B were 93.43 and 92.72% respectively. The effciency of zinc treatment after the second addition of zinc in reactor A and B were 54.78 and 90.72% respectively. The efficiency of zinc treatment after the third addition of zinc in reactor B was 48.62%. The results of this research showed a success in term of zine removed. The treatment efficiency in reactor A was 5.212 mg of total zinc per liter of liquid volume and reactor B was 10.367 mg of totalzinc per liter of liquid volume. The treatment efficiency was based on the adaptation of the Sulfate Reducing Bacteria (SRB), for the treating of zinc and the duration of the reactor working period.