Remediation of gypsiferous mine soil by biological sulfate reduction using sugarcane residues as electron donors | |
| Author | Jakpong Moonkawin |
| Call Number | AIT Thesis no.EV-18-11 |
| Subject(s) | Soils--Gypsum content Sulfate-reducing bacteria |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-18-11 |
| Abstract | Gypsiferous soil is soil contaminated by sufficient amount of gypsum which is defined as unsuitable medium for plant growth due to its very low water holding capacity and low nutrient content. Reducing gypsum content in the soil can potentially enhance soil qualities to be served for agricultural purposes. In t his research , laboratory scale batch reactors were studied in order to develop an appropriate system for remediating gypsiferous soil by biological sulfate reduction process. Sugarcane residues, molasses and press mud, were selected to be used as the carbon sources for sulfate reducing bacteria (SRB) treating gypsiferous mine soil (10.50% gypsum content) collected from gypsum mine site at N akhon Sawan province, Thailand. Bioreactors were carried out under different operational conditions including chemical oxygen demand (COD) to gypsum ratio, types of electron donors as well as the effect of pretreatment of electron donor on sulfate reductio n efficiency. The highest sulfate reduction efficiency (52%) was found on the bioreactor using molasses and pretreated press mud as carbon sources with the ratio of COD ML :COD PPM :gypsum of 3:3:1 at 63 operational days. In turn, it could decrease gypsum cont ent in the soil as low as 5% at the end of operation. Based on the results obtained in this study, it is quite evident that molasses and press mud can be applied as carbon sources in sulfate reduction process treating gypsiferous soil. |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-18-11 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Shipin, Oleg V.;Ekbordin Winijkul;Pimluck Kijjanapanich; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2018 |