Nature of Solar Radiation as Encouraged to Produce an Increment of Dissolved Oxygen and Hydrogen Peroxide in Oxidation Ponds for Community Wastewater Treatment at H.M.The King’s LERD Project Site in Phetchaburi Province, Thailand

Abstract

H.M.The King's initiative nature by nature process for community wastewater treatment has been conducted since 1990 at Laem Phak Bia sub district, Ban Laem district, Phetchaburi province, Thailand on UTM 1442240 to 1443480 N and 0619271 to 0619271 E. The fresh food markets and households were the point sources of Phetchaburi municipal wastewater that flowing newly construction sewage system in order to receive them to four sub stations on both sides of Phetchaburi river before pumping to Klongyang collection pond. The storage wastewater has been pumped about 3,600 cu.m./day through the 18.5 km. HPDE pipe and putting into sedimentation pond 1 and another four consecutive ponds (oxidation ponds 2, 3, 4, and 5) before the effluent flowing into the mangrove forest. However, the results of experiment found the values of BOD that showing drastic decreasing from Klongyang collection pond through the tip of 18.5 km. HPDE pipe to the sedimentation pond 1 then after it was gradually decreased from one oxidation pond to the next one. Highlight was placed on the obtained effluent after treated wastewater flowed over weir crest that finding BOD under standard and also the decreasing of total coliform bacteria and fecal coliform bacteria, particularly the pathogenic bacteria decreasing down to almost zero MPN/100mL. The question came up how total coliform bacteria and fecal coliform bacteria disappeared after the treated wastewater flowing over weir crest of the oxidation pond 3. The hypothesis was set on the effect of solar radiation to DO and H 2 O 2 which were employed for bacterial organic digestion process in wastewater treatment ponds by taking the measurement randomly on 19 May 2011 that solar radiation showing the solar energy between 0-750 W/m 2 all together with UV-A, UV-B, spectrum and net radiation.In order to accomplish the objectives of study, the wastewater quality indicators were found BOD in sedimentation pond 1 67.5 mg/L and oxidation pond 3 16.6 mg/L for 13 hours measurement. In the same manner, the values of DO and H 2 O 2 for 13 hours measurement found in oxidation pond 3 greater than sedimentation pond 1 in respect to 8.9 and 7.6 mg/L for DO and 2.27 and 0.31 µg/L for H 2 O 2 . Moreover, the polynomial correlation was studied in order to determine the relationship between net radiation and DO and found very high correlation coefficients in both sedimentation pond 1 and oxidation pond 3. For the quantity of H 2 O 2 , it was obtained the relationship between net radiation and H 2 O 2 in higher correlation coefficient in sedimentation pond 1 than oxidation pond 3 because of smaller amount of dissolved organic and inorganic matters in oxidation pond 3. It would be the reason that oxygen which occurred from phytoplankton and algae photosynthesis were not employed by organic digestion and respiration of bacteria. Therefore, it had to exist DO and accumulation only in water instead of producing H 2 O 2 in oxidation pond 3 during daylight time. This is why H 2 O 2 in oxidation pond 3 was not varied directly to ne...

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The effect of variation of dimensions of solar reflectors on solar enhanced model pond

“…This suggests that increase in solar radiation increases dissolved oxygen content in the pond. Pattamapitoon et al (2013) showed that dissolved oxygen increase with radiation in a quadratic relationship. Sample B, E, K and M have higher values of dissolved oxygen because their reflectors reflected more radiation in the pond which increased the algal activities in the pond and subsequently increased dissolved oxygen content in the pond.…”

Appropriate Discharge from Diversion Dam to Dilute High Concentrated Community Wastewater of Riverbank Settlements along Phetchaburi River in Phetchaburi Province, Thailand

“…So, it has to point out that the sampling point at 30-cm depth is eligible for being representative of any depth while water in motion. Therefore, the water quality studies of streamflow in Phetchaburi river will be taken from only the 30-cm depth as shown in Table 3 and Figure 4 which is the international measuring depth (PCD, 2013; APHA, 1952; APHA.AWWA.WEF, 1992; Metcalf and Eddy, 1979;Ntengwe, 2006;Postel and Richter, 2003;Pattamapitoon, 2013;Reynolds and Edwards, 1995;Streeter and Phelps, 1958;Tanji et al, 2006;Vagnetti et al, 2003;Vargaftik et al, 1983;Wang et al, 1987).…”

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