| Author | Jayadevan, Jeyabalasingham |
| Call Number | AIT Thesis no.EV-92-21 |
| Subject(s) | Sewage--Purification--Biological treatment
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | In order to establish guidelines for design and operation of thermophilic UASB process, a
semi pilot scale modified Up flow Anaerobic Sludge Blanke~ (UASB) reactor ( 125 1) was used to treat
the different industrial wastewater at a temperature of 55 C.
At first a wastewater from distillery factory which has the BOD/COD ratio of 0.25 was used
to evaluate the feasibility of the modified reactor. Jhe influent COD was maintained at 10,000 mg/l
approximately. The loading rate of 19 kg COD/m .d already reached by Chen et al (Thesis no EV
91 - 20) was maintained for a pe1iod of further two months until the pseudo steady condition was
reached 3
and maintained for a period of one month. Then the loading rate was increased to 27 kg
COD/m .d by increasing the flow rate to 350 lid for further two months (HRT = 8.6 hrs). Pseudo
steady condition could be maintained for more than three weeks. This shows the capability of
treating this Distillery wastewater successfully tlyough anaerobic treatment at the thermophilic
condition upto the loading rate of 27 Kg COD/m .d .
Because of less removal efficiency (i.e. 30% in te1ms of COD) of distille1y wastewater due
to its low biodegradability, another sample from Amino acid production which had the BOD/COD
ratio of 0.43 was used to evaluate the reactor perfo1mance in terms of removal efficiency and
loading rate.
The Tapioca Starch wastewffiter from the Amino acid production which is used for the animal
feed was started feeding from 25 December 1991. Initially influent strength of 5000 mf/l was
introduced at a flow rate of 100 lid (HRT = 25 hrs). The loading rate was 4.6 kg COD/m d. Due
to its inhibitory effect because of very high sulfate concentration of 5000 mg/l the influent strength
was red~ced to 3000 mg/l maintaining the same HR T, but reduced organic loading rate to 2 .4 kg
COD/m .d. The removal efficiency of 68% in terms of COD was achieved during the last phase. The
58% BOD removal efficiency in terms of total effluent BOD indicate the system is still acclimatizing
for the new wastewater. So the feasibility of treating this wastewater can be predicted only after a
few months of further experiment. |
| Year | 1992 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-92-21 |
| 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) | Harada, Hideki |
| Examination Committee(s) | Tanaka, Shuzo;Zhuang, Ya- Hui |
| Scholarship Donor(s) | Government of Finland |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1992 |