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All Journal Journal of Environmental Engineering & Waste Management
Erna Styani
Polytechnic of AKA Bogor
Chemical Engineering, Chemistry & Bioengineering Energy Engineering Environmental Science

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Journal : Journal of Environmental Engineering

 1 
Making and Testing Sample Control on Determination of Nitrite Content in Water and Wastewater by Using UV-Visible Spectrophotometer Erna Styani; Endang Sri Lestari; Ika Widiana; Muhammad Ramadhan
Journal of Environmental Engineering and Waste Management Vol 4, No 1 (2019)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (530.285 KB) | DOI: 10.33021/jenv.v4i1.653

Abstract

This study focused on Making and Testing sample  control as reference material on determination of nitrite content in water and waste water by using UV-Visible Spectrophotometer. Sample control has been made to replaced Certified Reference Materials (CRM) for  determination of Nitrite content in water and waste water by using UV -Visible  Spectrophotometer. Substitute materials for CRM should be homogeneous and stable, so the homogenity and stability control sample that has been made in this study  is tested by using standard referring to ISO Guide 35 , 2006. The result of   this experiments shows that    the values of Fstat and Ftable  on homogenity test are  0.796 and 3.179 (Fstat <  Ftable); while the values of  tstat and table  on the stability test are 0.431 and 2.101 (tstat <  table),  the mean of control sample concentration is 0,0435 mg / L. All test parameters have been qualified in accordance with ISO Guide 35 , 2006. The result of this  research shows  that the control of samples on the determination of Nitrite in water and waste water by using UV-Visible Spectrophotometer can be used as  substitute for CRM and reference material.
Primary sedimentation unit design at the glycerin production wastewater treatment plant at PT X Erna Styani
Journal of Environmental Engineering and Waste Management Vol 7, No 2 (2022)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jenv.v7i2.1610

Abstract

PT X has needs Waste Water Treatment Plant (WWTP) to reduce the high value of TSS and organic matter levels for the wastewater of glycerin production. The objective of the experiment is to design the dimensions of the primary sedimentation unit at PT X. This design is expected to reduce wastewater TSS levels up to 50 to 70 percent and BOD levels up to 25 to 40 percent. The design stages in this experiment include determining the quantity of wastewater discharged by PT X per day through production operations, quality testing wastewater, and designing primary sedimentation units. PT X wastewater quality testing includes measuring pH, ammonia, TSS, COD, BOD, oil & grease. The parameters are determined based on the basic oleochemical industry quality standard according to the Ministerial Regulation Environment Number 5 of 2014.  The primary sedimentation unit design in WWTP PT X was rectangular. The quantity of discharge of wastewater entering primary sedimentation tank of 0.00139 m3/second and detention time designed for 4 hours. Sedimentation tank volume is based on the calculation of 10 m3 with a multiplier of 1.1 so that the actual volume of the sedimentation tank is 11 m3. Based on the calculation results, the length of the tub is 4 m, the width of the tank is 1.1 m, 2.5 m deep, and 0.5 m freeboard. TSS level allowance and BOD that occurs in the primary sedimentation unit is the TSS level of 62.99% and BOD levels of 40.82%.  
Co-Authors Endang Sri Lestari Ika Widiana Muhammad Ramadhan