scholarly journals Greenhouse Gas Emissions from Wastewater Treatment System

1970 ◽  
Vol 8 (1-2) ◽  
pp. 178-187
Author(s):  
Rohini Prasad Devkota
Keyword(s):  
Wastewater Treatment ◽  
Greenhouse Gases ◽  
Treatment System ◽  
Nitrous Oxide Emissions ◽  
Septic Tank ◽  
Aeration Tank ◽  
Sludge Sample ◽  
Wastewater Treatment System ◽  
Ch4 Production ◽  
Emission Of Greenhouse Gases

Besides its great potential in controlling water pollution from different sources, waste water treatment system generates significant amount of greenhouse gases. Hence, reducing the emission of greenhouse gases from the wastewater treatment plants is the major concern. The correct understanding and estimation of the greenhouse gases emitted from different points of the plan is essential to tackle this challenge. This research has attempted to evaluate and quantify the greenhouse gases, mainly methane and nitrous oxide, emissions from the wastewater treatment system under varying conditions of temperature and oxygen.The sludge samples were collected from the septic tank, aeration tank, denitrification tank and digestion tank to examine the emission of greenhouse gases from the samples with and without nutrients and volatile fatty acids(VFA). To examine the effect of temperatures on the emission of greenhouse gases, experiments were designed under different temperatures by keeping reactors at 4º C, 20º C, 25º C, 30º C, 37º C and 50º C. Similarly, experiments were carried out at 37º C under different amount of oxygen supply (0, 0.1, 0.4, 1.0 and 2.0 mg/L) to examine the role of oxygen in greenhouse gases emission.Experimental results showed that the rate of emission of CH4 gas from the sludge sample was enhanced with the presence of glucose, nutrients and VFA. Rate of CH4 production was well correlated with sludge temperature. It was similar for all sludge samples taken from different points of the treatment plant. Rate of production was found highest for digestion sludge and least fir septic sludge. CH4 production was started earlier and found fastest from the digestion sludge. An inverse relationship was found between the rate of CH4 emission and the amounts of oxygen present in the sludge sample. However, N2O emission was not detected at all.Keywords: Methane; Anaerobic; Temperature; Nutrients; Wastewater; SludgeDOI: http://dx.doi.org/10.3126/jie.v8i1-2.5110Journal of the Institute of Engineering Vol. 8, No. 1&2, 2010/2011Page: 178-187Uploaded Date: 20 July, 2011

scholarly journals Modified Septic Tank: Innovative Onsite Wastewater Treatment System

Water ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 578 ◽  
Author(s):  
Bassim Abbassi ◽  
Raihan Abuharb ◽  
Bashaar Ammary ◽  
Naser Almanaseer ◽  
Christopher Kinsley
Keyword(s):  
Wastewater Treatment ◽  
Treatment System ◽  
Septic Tank ◽  
Wastewater Treatment System ◽  
Onsite Wastewater ◽  
Onsite Wastewater Treatment System ◽  
Onsite Wastewater Treatment

scholarly journals Design of the wastewater treatment system of an office building

2017 ◽  
Vol 1 (2) ◽  
pp. 48-62
Author(s):  
Rizky Raissha ◽  
Mas Agus Mardyanto
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Engineering Design ◽  
Treatment System ◽  
Office Building ◽  
Silica Sand ◽  
Septic Tank ◽  
Anaerobic Filter ◽  
Wastewater Treatment System ◽  
Equalization Tank

The MIPA Tower office building, an eleven-storey building, which is located in the area of Institut Teknologi Sepuluh Nopember Surabaya, is under construction. The building will be utilized for offices, classrooms, and laboratories. In the operation of the building, domestic and laboratory wastewater will be produced. This wastewater contains compounds that can pollute the environment. A design of domestic and laboratory wastewater treatment system is conducted. The system comprises of a neutralization tank, a grease trap, an equalization tank, an anaerobic filter, and an activated carbon and silica sand filter. The steps of the design are (i) collecting primary data and secondary data, (ii) calculating the engineering design, (iii) drawing the Detailed Engineering Design (DED), and (iv) calculating the bill of quantity and budget. The conclusion of this design is that the treatment plant will treat a mixture of domestic and laboratory wastewater. The dimension of each unit is as follows: (i) the neutralization tank (Ø = 0.65 m, H = 0.43 m), (ii) the grease trap (4 m x 2 m x 1 m), (iii) the equalization tank (10.5 m x 5.5 m x 2.5 m), (iv) the septic tank (4.5 m x 4 m x 2.5 m), (v) the six-compartment anaerobic filter (2.25 m x 4 m x 2.5 m), and (vi) the filter with activated carbon (H = 50 cm), silica sand (H = 150 cm), and gravel (H = 10 cm), with the diameter of the tank is 1.5 m.

Performance of hybrid small wastewater treatment system consisting of jet mixed separator and rotating biological contactor

1997 ◽  
Vol 35 (6) ◽  
pp. 63-70 ◽  
Author(s):  
Yoshimasa Watanabe ◽  
Yoshihiko Iwasaki
Keyword(s):  
Wastewater Treatment ◽  
Electric Power ◽  
Hybrid System ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Treatment System ◽  
Municipal Wastewater Treatment ◽  
Wastewater Treatment System ◽  
Pre Treatment ◽  
Organic Particles

This paper describes a pilot plant study on the performance of a hybrid small municipal wastewater treatment system consisting of a jet mixed separator(JMS) and upgraded RBC. The JMS was used as a pre-treatment of the RBC instead of the primary clarifier. The treatment capacity of the system was fixed at 100 m3/d, corresponding to the hydraulic loading to the RBC of 117 L/m2/d. The effluent from the grid chamber at a municipal wastewater treatment plant was fed into the hybrid system. The RBC was operated using the electric power produced by a solar electric generation panel with a surface area of 8 m2 under enough sunlight. In order to reduce the organic loading to the RBC, polyaluminium chloride(PAC) was added to the JMS influent to remove the colloidal and suspended organic particles. At the operational condition where the A1 dosage and hydraulic retention time of the JMS were fixed at 5 g/m3 and 45 min., respectively, the average effluent water quality of hybrid system was as follows: TOC=8 g/m3, Total BOD=8 g/m3, SS=8 g/m3, Turbidity=6 TU, NH4-N=7 g/m3, T-P=0.5 g/m3. In this operating condition, electric power consumption of the RBC for treating unit volume of wastewater is only 0.07 KWH/m3.

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