scholarly journals PENGARUH PENAMBAHAN ZEOLIT ALAM TERMODIFIKASI SEBAGAI MEDIA IMOBILISASI BAKTERI TERHADAP DEKOMPOSISI MATERIAL ORGANIK SECARA ANAEROB

2017 ◽  
Vol 11 (1) ◽  
pp. 36
Author(s):  
Melly Mellyanawaty ◽  
Chandra Wahyu Purnomo ◽  
Wiratni Budhijanto
Keyword(s):  
Anaerobic Digestion ◽  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Total Solid ◽  
Volatile Solid ◽  
Spent Wash ◽  
Distillery Spent Wash ◽  
Soluble Chemical Oxygen Demand

Penelitian ini bertujuan untuk mengetahui pengaruh penambahan zeolit alam termodifikasi sebagai media imobilisasi terhadap dekomposisi material organik pada proses anaerobic digestion. Modifikasi yang dilakukan adalah dengan cara mengimpregnasi ion besi(Fe2+)ke dalam zeolit yang telah dibentuk menjadi cincin Raschig. Impregnasi yang dilakukan adalah impregnasi basah. Dalam penelitian ini digunakan 3 variasi konsentrasi larutan Fe2+ yaitu 10 mg/L; 100 mg/L dan 2000 mg/L. Dari hasil impregnasi zeolit menggunakan ketiga konsentrasi tersebut diperoleh kadar Fe2+ yang terdeposit ke dalam zeolit berturut-turut: 0,0016 mgFe2+/gZeo; 0,0156 mgFe2+/gZeo; 0,3125 mgFe2+/gZeo dan 0 mgFe2+/gZeo digunakan sebagai kontrol. Zeolit termodifikasi Fe2+ kemudian ditambahkan ke dalam reaktor anaerobik yang dijalankan secara batch. Perbandingan volume media zeolit dan cairan adalah 1:1. Substrat yang digunakan berupa campuran limbah distillery spent wash dengan konsentrasi soluble Chemical Oxygen Demand (sCOD) 10.000 mg/L dan keluaran dari digester aktif kotoran sapi sebagai inokulum. Perbandingan volume distillery spent wash terhadap inokulum sebesar 2:1. Proses anaerobik dijalankan selama 28 hari.Jika dibandingkan dengan data Total Solid (TS) dan Volatile Solid (VS), hasil percobaan menunjukkan bahwa data analisis sCOD memberikan data yang lebih akurat dan konklusif untuk mengukur perubahan material organik dalam proses peruraian anaerobik menggunakan media imobilisasi. Dari keempat variasi kadar Fe2+ yang digunakan dalam penelitian ini, Fe2+ dengan kadar 0,0156 mgFe/gZeo memberikan efisiensi penurunan material organik (sCOD) tertinggi yaitu 66,73%. Sedangkan Fe2+ dengan kadar 0,3125 mgFe/gZeo mampu meningkatkan produksi biogas sebesar 43%. Namun secara keseluruhan proses peruraian anaerobik yang menggunakan zeolit termodifikasi Fe2+ menghasilkan biogas lebih banyak daripada kontrol (zeolit tanpa Fe2+).

scholarly journals The Effect of Magnesium Sulfate Addition on Volatile Solid Destruction and Chemical Oxygen Demand Reduction of Food Waste Anaerobic Digestion

2019 ◽  
Vol 10 (8) ◽  
pp. 1602
Author(s):  
Khansa Luqyana Hapsari ◽  
Firyal Tharifa ◽  
Setyo Sarwanto Moersidik ◽  
Sandyanto Adityosulindro ◽  
Cindy Rianti Priadi
Keyword(s):  
Anaerobic Digestion ◽  
Chemical Oxygen Demand ◽  
Magnesium Sulfate ◽  
Food Waste ◽  
Oxygen Demand ◽  
Volatile Solid ◽  
Demand Reduction ◽  
Chemical Oxygen Demand Reduction

Enhancing color and chemical oxygen demand degradation in distillery spent wash by electrocoagulation and ozone assisted electrocoagulation

2020 ◽  
Vol 197 ◽  
pp. 213-223
Author(s):  
Manoj Pandurang Wagh ◽  
Pravin Dinkar Nemade ◽  
Uday Naik ◽  
Ayan Sengupta
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Spent Wash ◽  
Distillery Spent Wash

scholarly journals Degradation of distillery spent wash using monopolar parallel and monopolar series electrocoagulation process

2021 ◽  
Vol 2 (1) ◽  
pp. 8-17
Author(s):  
Sukanya Pujari ◽  
Manoj Wagh ◽  
Shila Dare
Keyword(s):  
Chemical Oxygen Demand ◽  
Waste Treatment ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Cost Effective ◽  
Electrochemical Treatment ◽  
Cod Removal ◽  
Spent Wash ◽  
Distillery Spent Wash ◽  
The Impact

In waste treatment and water management issues, electrocoagulation (EC) is the most cost-effective and environmentally friendly option. In the study, EC treatment of distillery spent wash was carried out using new electrodes packed with aluminium foil scraps. These metal scraps were packed in a mesh to function as anode and cathode electrodes. Electrochemical treatment was carried out for 150 minutes, and samples were analysed regularly to determine the colour and chemical oxygen demand (COD). The impact of operating parameters such as pH, applied current, electrolysis time, agitation speed, and electrode distance on colour and COD removal was investigated. The EC processes were carried out in monopolar parallel (MP-P) and monopolar series (MP-S). The MP-S connection measured the potential difference between the amplified pair of electrodes, whereas the output signals in the MP-P connection were formed by several input electrodes, resulting in a high removal rate. The results indicated that the MP-P relationships enhance the COD removal rate by 4.16 to 8.06 %. An optimum chemical oxygen demand degradation is 77.29 % at pH 3, and decolourisation is 76.55 % at pH 8.3. TDS is reduced to a maximum of 58.32 %, while sulfate and chloride are reduced to 64.72 and 20.44 %, respectively.

The role of pH in the organic material solubilization of domestic sludge in anaerobic digestion

2003 ◽  
Vol 48 (3) ◽  
pp. 143-150 ◽  
Author(s):  
C. Yangin Gomec ◽  
R.E. Speece
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Chemical Oxygen Demand ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Ph Control ◽  
Primary Sludge ◽  
Anaerobic Reactors ◽  
Soluble Chemical Oxygen Demand ◽  
Ph Controlled

The effect of pH on anaerobic solubilization of domestic primary sludge and activated sludge was investigated and compared. Anaerobic solubilization was carried out in continuously stirred anaerobic reactors at mesophilic temperature (35°C) and pH was fixed at 6.5 (pH-controlled). Many researches reported the serious effects of pH on the solubilization of organic materials. Thus, the aim of pH control in the reactors consisting of domestic primary and activated sludges, was the evaluation of retardation in hydrolysis/acidogenesis at low pH values. Since primary and activated sludges have different biodegradation characteristics, results were compared. Results indicated that the destruction of Total Suspended Solids (TSS) and Volatile Suspended Solids (VSS) were better in the pH-controlled reactors. In both sludges, acetic acid was the main Volatile Fatty Acid (VFA) produced. In the pH-controlled reactors, VSS reduction was found to be 72% in about 20 days in the anaerobic digestion of activated sludge, whereas for the same interval VSS reduction could only be achieved by 32% in primary sludge at 35°C. When primary sludge was used as substrate, the pH-uncontrolled and the pH-controlled reactors removed VSS with a corresponding production of VFAs and Soluble Chemical Oxygen Demand (SCOD). However, production of VFAs and SCOD was ceased after 5 days in the pH-controlled reactor whereas VFAs and SCOD production continued after 5 days in the pH-uncontrolled reactor, which indicated that hydrolysis and fermentation did not complete and continued longer. On the other hand; in either the pH-uncontrolled or the pH-controlled reactor of activated sludge, VSS was not removed with a corresponding production of VFAs and Soluble Chemical Oxygen Demand (SCOD). It was apparent that solubilization was occurring, however this solubilization was not observed as VFA production. When total methane production and total COD (CODtot) removal were estimated using VSS removal in both types of sludges, results indicated that pH control enhanced biogas productions as well as CODtot removals.

scholarly journals Peningkatan Kualitas Biogas Melalui Proses Pemurnian Dengan Purifier Bertingkat Seri Menggunakan Adsorben Arang Aktif Dan Zeolit

2021 ◽  
Vol 14 (1) ◽  
pp. 1-14
Author(s):  
Abdul Mukhlis Ritonga ◽  
Masrukhi Masrukhi ◽  
Ahmad Mafrukhi
Keyword(s):  
Chemical Oxygen Demand ◽  
Biochemical Oxygen Demand ◽  
Activated Charcoal ◽  
Oxygen Demand ◽  
Total Solid ◽  
Gas Production ◽  
Gas Content ◽  
Volatile Solid ◽  
Methane Gas

Abstrak. Biogas merupakan gas yang dihasilkan dari bahan organik melalui proses fermentasi. Energi yang terkandung dalam biogas tergantung dari konsentrasi metana (CH4). Semakin tinggi kandungan metana maka semakin besar kandungan energi pada biogas. Salah satu cara untuk meningkatkan kandungan gas metana pada biogas serta dapat menurunkan gas-gas pengotor seperti CO2, dan gas-gas lain yang tidak terpakai dengan pemurnian menggunakan purifier yang telah di isi adsorben, pada penelitian ini adsorben yang digunakan yaitu arang aktif dan zeolit. Variabel yang diukur dalam penelitian ini yaitu C/N rasio, pH, suhu, total solid (TS), volatile solid (VS), Biochemical Oxygen Demand (BOD) dan Chemical Oxygen Demand (COD) yang berpengaruh dalam produksi gas metan. Kadar  CH4 dan CO2 setelah dimurnikan, dan waktu optimal untuk proses pemurnian biogas, perlakuan yang diberikan menggunakan 3 waktu pengujian, yaitu 30, 60, dan 90 menit. Percobaan dilakukan pengulangan sebanyak tiga kali. Hasil penelitian menunjukkan bahwa rasio C/N sebesar 20,36 dengan suhu rata-rata 25,1oC dan pH rata-rata 6. Nilai BOD awal dan akhir masing-masing sejumlah 77800,86 mg/l dan 53002,42 mg/l dan COD awal dan akhir masing-masing sejumlah 59800 mg/l dan 36000 mg/l. TS dan VS masing masing mengalami penurunan sebesar 20,99% dan 17,93%. Penggunaan adsorben arang aktif dan zeolit dapat meningkatkan kandungan gas CH4 sebesar 136,5% dan menurunkan kandungan gas CO2 sebesar 64% pada biogas. Lama waktu pengujian mampu meningkatkan konsentrasi CH4 dan menurunkan kandungan gas CO2 dengan waktu paling optimal yaitu 30 menit.Increasing Quality Of Biogas With Purification Proses On Double Arranged Series Purifier Using Activated Charcoal And Zeolit AdsorbentAbstract. The quality of biogas is determined by the methane (CH4) content in the biogas. A good biogas is indicated by its high methane content. One way to increase the methane gas content in biogas is by purification using a series-level purifier that has been filled with adsorbents. In this study, the adsorbents used were activated charcoal and zeolite. The variables measured include CN ratio, pH, temperature, total solid (TS), volatile solid (VS), Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) which influential in methane gas production. CH4 and CO2 levels, before and after purification. Biogas was purified for a duration of 30, 60, 90 minutes and was repeated three times. The results showed that the C/N ratio was 20.36 with an average temperature of 25.1 °C and an average pH of 6. The initial and final BOD values were 77800.86 mg/l and 53002.42 mg/l and the initial and final COD values were 59800 mg/l and 36000 mg/l. TS and VS experienced a decrease of 20.99% and 17.93%. The use of activated charcoal and zeolite adsorbents was able to increase the CH4 gas content by 136.5% and reduce the CO2 gas content by 64%. The optimal purification time is 30 minutes.

scholarly journals LAB-SCALE STUDY ON CO-DIGESTION OF KITCHEN WASTE, SLUDGE AND SEWAGE

2018 ◽  
Vol 54 (2A) ◽  
pp. 231
Author(s):  
Son Minh Tran
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Total Solid ◽  
Organic Wastes ◽  
Septic Tank ◽  
Kitchen Waste ◽  
University Of Technology ◽  
Working Volume ◽  
Soluble Chemical Oxygen Demand ◽  
Kjeldahl Nitrogen

Anaerobic digestion is widely used for biodegradable solid organic wastes in order to recover bio-energy in the form of biogas. Some previous studies presented that co-digestion of various substrates can improve biogas yields as well as enhanceperformance of organic wastes digestion, in comparison with digestion of sole solid waste. This study aimed to evaluate the performance of anaerobic mono-digestion and anaerobic co-digestion of the following mixtures: (a) sole kitchen waste (KW), (b) KW and sewage (SW), (c) sole sludge (SL)and (d) KW and SL. This study was conductedby four lab-scale anaerobic complete mixing reactors (numbered MH1 – MH4) in 4,5 liters working volume atorganic loading rate (OLR) 2,0 g(VS).L-1.d-1. The KW was collected from canteen B4 and SW was collected from effluent from septic tank C6 Building in Ho Chi Minh University of Technology (HCMUT). The results show that the reactor of sole KW obtained average total chemical oxygen demand (tCOD), soluble chemical oxygen demand (sCOD), total solid (TS), volatile solid (VS), total phosphorus (TP) and total Kjeldahl nitrogen (TKN) of 62 %, 62 %, 71 %, 72 %, 73 % and 45 %, respectively, whereas reactor of KW and SW co-digestion had were tCOD, sCOD, TS, VS, TP and TKN removal of 73 %, 78 %, 75 %, 79 %, 59 % and 57 %, respectively. Thus co-digestion of KW and SW revealed an efficient enhancement of digestion, instead of sole KW digestion. Similarly, TS (74 %) and VS removals (75 %) of co-digesting mixtures of SL and KW were higher than those of sole SL digestion (67 %). Furthermore, co-digestion of SL and KW obtained better performance in tCOD and sCOD removals (70 % and 76 %, respectively).

scholarly journals Improvement of Waste Dehydrated Sludge for Anaerobic Digestion through High-Temperature and High-Pressure Solubilization

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 88 ◽  
Author(s):  
Eui-Hwan Hong ◽  
Jun-Gyu Park ◽  
Beom Lee ◽  
Wei-Qi Shi ◽  
Hang-Bae Jun
Keyword(s):  
Anaerobic Digestion ◽  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Stable Operation ◽  
Thermal Hydrolysis ◽  
Methane Generation ◽  
Methane Potential ◽  
Higher Temperature ◽  
Soluble Chemical Oxygen Demand ◽  
Pre Treatment

Biochemical methane potential tests and lab-scale continuous experiments were conducted to improve the yield and energy efficiency of anaerobic digestion through thermal hydrolysis pre-treatment. Methane generation, yield, and solubilization efficiency were evaluated through lab-scale tests. The pre-treated samples presented 50% biodegradability at 140 °C and 61.5% biodegradability at 165 °C. The increase in biodegradability was insignificant at 165 °C or higher temperature, and it was confirmed that the optimum conditions were achieved at 165 °C and 20 min of solubilization. The lab-scale continuous experiments confirmed that polymers were decomposed into low-molecular-weight compounds due to thermal hydrolysis, and pH decreased. NH4HCO3 produced by thermal hydrolysis acted as an alkali to enable a more stable operation compared to that before thermal hydrolysis. Total chemical oxygen demand as chromium (TCODCr) and soluble chemical oxygen demand as chromium (SCODCr) indicated 35.4% and 23.1% removal efficiency in terms of organic matter removal, respectively. Methane yield was approximately 0.35 kg m−3 at 2.0–4.0 kg (m3 d)−1 and 0.26 kg m−3 at 5.0 kg (m3 d)−1. The solubilization rate of 40.9% by thermal hydrolysis was confirmed through the lab-scale tests to determine its full-scale applicability.

The Comparison of Substrate Changes in Microbial Fuel Cells Using Excess Sludge and Simple Anaerobic Digestion

2013 ◽  
Vol 864-867 ◽  
pp. 1839-1842
Author(s):  
Xiao Qin Zhao ◽  
Xiao Jie Sun ◽  
Su Na Wei ◽  
Jiang Cheng Liang ◽  
Yang Yang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anaerobic Digestion ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cells ◽  
Oxygen Demand ◽  
Control Device ◽  
Excess Sludge ◽  
Upward Trend ◽  
Air Cathode ◽  
Soluble Chemical Oxygen Demand

Based on the previous studies, this experiment presented a new kind of microbial fuel cells (MFC), single-chamber air cathode microbial fuel cells without proton membrane. After investigating the contrast of substrate changes in microbial fuel cells and simple anaerobic digestion, the analysis results of soluble chemical oxygen demand (SCOD), TP, TN and NH3-N show that: SCOD increase firstly, then decrease, to the end, descend. As a result, we find that SCOD in MFC is lower than that in control device (CD). Throughout the whole reaction period, TP in MFC is lower than that in CD. TN and NH3-N show upward trend after a reaction period.

Sign in / Sign up

Export Citation Format

Share Document