Treatment of ceramic sanitaryware industry wastewater | |
| Author | Mehrotra, Anil Kumar |
| Call Number | AIT Thesis no. 884 |
| Subject(s) | Refuse and refuse disposal Factory and trade waste |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | The wastewater from the ceramic sanitaryware factory is rich in inorganic suspended solid content, On the basis of the flow measurement and the characteristics of the waste, it is observed that the flow varies from 2 to 8 m3 /h and the suspended solid concentration from 200 to 3000 mg/l. Thus average daily waste volume of SO m3 carries a total suspended solid load of about 7S kgs. The COD of waste varies from SO to 2SO mg/l. Since the wastewater does not meet the existing effluent standards, particularly in terms of suspended solids, treatment of the waste is necessary. From the in-plant evaluation, it is concluded that the activities in cast shop are mainly responsible for this waste generation. The possibilities of reducing waste volumes from this section, and all other areas generating waste, have been explored. These studies have led to some suggestions for reducing these waste generations. The treatment of the waste with coagulants alone is not found satisfactory. Commercially available polyelectrolytes with alum have demonstrated to be of reasonable success. The most effective polyelectrolytes found are Kurifloc and Primafloc C-7. These when used with alum in a proportion of O.S mg/l polyelectrolyte with SO to 90 mg alum for each litre of waste, have given reasonably good clarification. From settling column tests, it is found that a theoretical detention time in sedimentation basin of 100-120 min. with an over flow rate of O.OOS to 0.01 m3 /min-m2 could give supernatant suspended sol ids level of 30 mg/ l . The sludge from such treatment is found to contain 3-7% solids. The sludge would require further compaction before it can be disposed economically. Sludge properties are obtained for designing of a suitable sludge dewatering facility. The continuous treatment studies with a lab scale unit have confirmed the effectiveness of these dosages. |
| Year | 1975 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Nguyen Cong Thanh ; Samorn Muttamara |
| Examination Committee(s) | Pescod, M.B. |
| Scholarship Donor(s) | Government of the Netherlands |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1975 |