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ที่มา:KASETSART UNIVERSITY FISHERIES RESEARCH BULLETINหัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Carbonaceous biochemical oxygen demand and nitrification oxygen demand of the effluents of Penaeus monodon culture ponds) ผู้เขียน: วรรณา มุสิก, จุฑามาศ ชมภูนิช,  ดร.ยนต์ มุสิก, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractFive-day carbonaceous biochemical oxygen demand (CBOD5) of Penaeus monodon pond effluents varied between 9.3 and 34.0 mg/1 and ultimate carbonaceous BOD of the effluent varied between 10.7 and 42.0 mg/1. CBOD5 of the effluents were 51-2 to 86.9 percent of ultimate CBOD. Rate of biochemical oxidation (k) of shrimp pond effluents varied between 0.06 and 0.18 per day with an average k value of 0.12. Nitrification oxygen demand of shrimp pond effluents varied between 0 and 1.0 mg/1 at 5 days, 0.4 and 22.9 mg/1 at 10 days and 13.4 and 38.2 mg/1 at 20 days. Combined oxygen demand of shrimp pond effluents varied between 9.3 and 34.0 mg/1 at 5 days, 20.4 and 64.6 mg/1 at 10 days, and 28.0 and 80.0 mg/1 at 20 days. At 20 days, nitrification oxygen demand were 29.0 to 61.8 percent of combined oxygen demand. Results of laboratory scale investigation indicated that aeration can significantly increase reduction rate of BOD5 of shrimp pond eftluents. |
ที่มา:KASETSART UNIVERSITY FISHERIES RESEARCH BULLETINหัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Carbonaceous biochemical oxygen demand and nitrification oxygen demand of the sediments of Penaeus monodon culture ponds) ผู้เขียน:วรรณา มุสิก, ดร.ยนต์ มุสิก, รองศาสตราจารย์, จุฑามาศ ชมภูนิช สื่อสิ่งพิมพ์:pdf AbstractFive-day carbonaceous biochemical oxygen demand (CBOD5) of Penaeus monodon pond sediments varied between 10.0 and 40.8 mg/g dry weight. Ultimate carbonaceous BOD of the sediments varied between 16.3 and 61.5 mg/g dry weight. Average CBOD5 of the sediments was 23.2 mg/g dry weight and average ultimate carbonaceous BOD of the sediment was 33.1 mg/g dry weight. CBOD5 of the sediments were 64.9 to 84.7 percent of ultimate CBOD. Rate of biochemical oxidation (k) of shrimp pond sediments varied between 0.09 and 0.15 per day with an average k value of 0.11. Nitrification oxygen demand of shrimp pond sediments varied between 0 and 1.0 mg/g dry weight at 5 days, 2.0 and 4.8 mg/g at 10 days and 4 and 5.6 mg/g at 20 days. Combined oxygen demand of shrimp pond sediments varied between 11.0 and 35.4 mg/g at 5 days, 14.7 and 47.8 mg/g dry weight at 10 days, and 17.7 and 55.1 mg/g dry weight at 20 days. Average twenty-day nitrification oxygen demand of shrimp pond sediments was 5.8 mg/g dry weight. At 20 days, nitrification oxygen demand were 15.6 to 25.6 percent of combined oxygen demand. Results of laboratory scale investigation indicated that aeration of overlying water together with periodically stirring of the sediment can significantly increase reduction rate of BOD5 of shrimp pond sediments. |