Effects of hydraulic factors on algal growth in high-rate ponds | |
| Author | Tran Van Nhan |
| Call Number | AIT Thesis no. EV-84-21 |
| Subject(s) | Sewage--Purification--Biological treatment Algae--Growthk |
| Note | A thesis submitted partial fulfillment o f the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The present thesis is concerned with the algal growth rate in the high-rate algal ponds. The research work concentrated on the effects or the hydraulic factors on algal growth. The culture was carried out in pilot-scale ponds at ~Reynold's number (Re) of 5,100, 10,000, 19,00U, 38,600 and 75,000, under surface loading of 350 kg CUD/ha -da y with 3.1 days as detention time and 0.3 m as effluent depth. The tests were divided into 5 runs. The characteristics of pond performance such as algal concentration, pond pH, temperature, and nutrient removal were observed during the course of all the 5 runs. Diurnal tests of algal concentration , pH and the depth profiles or algal concentration, and pH we r e performed during the steady state of each run. The optimum Re-was determined . It is 25,000 for this case. The relationship between the algal growth rate, algal concentration and He, the yields and algal growth rate were set up. The pongs' removal efficiencies were 90 , BO and 60 % for COD, nitrogen, and phosphorus, respectively. The relationship between the effluent nitrogen, phosphorus , and algal concentration in the ponds were also studied. The nitrogen and phosphorus removal rates were drawn from the study to be a bout 3.56 mg of N per 100 mg of algal biomass a nd 0.434 mg of P per 100 mg of algal biomass, respectively. The mathematical equations tor the Relationships between the effluent nitrogen, phosphorus with the e algal concentration were also set up . |
| Year | 1984 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| 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) | Chongrak Polprasert |
| Examination Committee(s) | Nguyen, Cong Thanh ; Vigneswaran, Saravanamuthu |
| Scholarship Donor(s) | Japanese Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1984 |