scholarly journals Performance of Aerobic Microbial Granules in Organic Carbon Removal as a Method in the Treatment of Biodegradable Wastewater

2019 ◽  
Vol 125 ◽  
pp. 03014
Author(s):  
Nanik Indah Setianingsih ◽  
Hadiyanto ◽  
Sudarno ◽  
Rustiana Yuliasni
Keyword(s):  
Wastewater Treatment ◽  
Organic Carbon ◽  
Retention Time ◽  
Biological Treatment ◽  
High Performance ◽  
Settling Velocity ◽  
Hydraulic Retention Time ◽  
Excess Sludge ◽  
Large Area ◽  
Anaerobic System

Conventional biological wastewater treatment is effective in removing organic carbon but has weaknesses in need large area, long hydraulic retention time, produce excess sludge in activated sludge system and need post treatment for removing nutrient in the anaerobic system. Aerobic microbial granules is a biological method in wastewater treatment that potential to overcome the lack of conventional biological treatment. Aerobic granules were developed in SBR made of glass with an effective volume of 10 L. Acetate was used as a source of carbon with COD concentration 900-1200 mg/L. SBR was run in anaerobic and aerobic phase with a hydraulic retention time of 8,3 hours and an exchange ratio of 60%. Granules begin to be formed after 14 days operational period with SVI30 to SVI5 ratio reach on 0,97 and settling velocity 13,8 cm/minute. High performance in degrading organic carbon is shown by aerobic microbial granules system with removal efficiency reaches on 94-97%.

scholarly journals PENGARUH PENAMBAHAN IMPELLER TERHADAP KINERJA SEQUENCING BATCH REACTOR PADA LIMBAH CAIR TAHU

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Irma Ilham Yadaturrahmah ◽  
Novirina Hendrasarie
Keyword(s):  
Wastewater Treatment ◽  
Retention Time ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Sequencing Batch Reactor ◽  
Hydraulic Retention Time ◽  
Batch Reactor ◽  
Organic Content ◽  
Total N ◽  
N Removal

Saat ini usaha industri tahu sedang berkembang. Limbah yang dihasilkan dari industri tahu akan menjadi suatu permasalahan bagi lingkungan. Pengolahan air limbah industri tahu dapat dilakukan dengan cara pengolahan biologis karena dapat menurunkan kandungan organik pada air limbah tahu.  Salah satu teknologi pengolahan limbah yang efektif dan efisien adalah Sequencing Batch Reactor (SBR).  Prinsip operasi SBR adalah mengisi dan menarik (fill and draw), yang terdiri dari lima tahap yaitu pengisian (fill), reaksi (reaction), pengendapan (settle), pembuangan air olahan (decand) dan pembuangan lumpur (idle).  Penelitian ini bertujuan untuk mengetahui kinerja SBR dengan penambahan impeller pada fase aerobik dalam menurunkan kandungan BOD, PO4 dan N Total pada air limbah tahu. SBR dioperasikan dengan waktu retensi hidrolik (HRT) dan kecepatan pengadukan yang bervariasi, yaitu masing-masing sebesar 24, 36 jam dan 48 jam serta kecepatan pengadukan sebesar 50, 100 dan 150 rpm. Dari hasil penelitian didapatkan HRT dan kecepatan pengadukan optimum, yaitu masing-masing sebesar 48 jam dan 150 rpm. Dengan efisiensi penyisihan BOD, PO4 dan N Total yang dihasilkan, masing-masing sebesar 93,33%, 90,97% dan 93,73%. Kata kunci: air limbah tahu, impeller, kecepatan, pengadukan, Sequencing Batch Reactor (SBR), waktu retensi hidrolik (HRT).  Currently the tofu industry is growing. The waste produced from the tofu industry will be a problem for the environment. Tofu industrial wastewater treatment can be done by biological treatment because it can reduce the organic content in tofu wastewater. One of the effective and efficient waste treatments is Sequencing Batch Reactor (SBR). The principle of operation of the SBR is fill and draw, which consists of five stages, fill,, reaction, settle, decand and idle. This study aims to see the performance of SBR with the addition of an impeller in the aerobic phase in reducing the content of BOD, PO4 and Total N in tofu wastewater. SBR is operated with a hydraulic retention time (HRT) and varying stirring speeds, namely 24, 36 and 48 hours respectively and stirring speeds of 50, 100 and 150 rpm. The results showed that the optimal HRT and stirring speed were 48 hours and 150 rpm, respectively. With the efficiency of BOD, PO4 and Total N removal produced, respectively 93,33%, 90,97% and 93,73%. Keywords: Hydraulic Retention Time (HRT), impeller, Sequencing Batch Reactor (SBR), speed, stirring, Tofu Industrial Wastewater. 

The nitrogen removal potential of predenitrification systems in sensitive coastal areas

1995 ◽  
Vol 32 (7) ◽  
pp. 135-142
Author(s):  
E. Görgün ◽  
N. Artan ◽  
D. Orhon ◽  
R. Tasli
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Retention Time ◽  
Treatment Process ◽  
Hydraulic Retention Time ◽  
Domestic Sewage ◽  
Coastal Areas ◽  
Careful Evaluation ◽  
Denitrification Kinetics

Effective nitrogen removal is now required to protect water quality in sensitive coastal areas. This involves a much more difficult treatment process than for conventional domestic sewage as wastewater quantity and quality exhibits severe fluctuations in touristic zones. Activated sludge is currently the most widely used wastewater treatment and may be upgraded as a predenitrification system for nitrogen removal. Interpretation of nitrification and denitrification kinetics reveal a number of useful correlations between significant parameters such as sludge age, C/N ratio, hydraulic retention time, total influent COD. Nitrogen removal potential of predenitrification may be optimized by careful evaluation of wastewater character and the kinetic correlations.

scholarly journals Treatment Of Tofu Industry Wastewater Using Bioreactor Anaerobic-Aerobic And Bioball As Media With Variation Of Hidraulic Retention Time

REAKTOR ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 18-25
Author(s):  
Ariani Dwi Astuti ◽  
Dewi Intania Ayu
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Negative Impact ◽  
Low Cost ◽  
Industrial Effluent ◽  
Organic Loading Rate ◽  
High Concentration ◽  
Small Industries

Tofu which is made by grinding soy bean, generates huge amount of wastewater and thus considered as one of the most polluted food-industrial effluent owing to its high values of organic contents. The small industries of tofu preparation process release the wastewater directly into the water body without being treated first. Prior to discharge this wastewater into the waterbody, the wastewater must be treated to reduce the possibility of negative impact and the contamination of the waterbody. For these small industries, the best alternative of wastewater treatment is one which has the following criteria: easy in operation, low cost operation, low volumes of sludge produced, and can be used in high concentration wastewater. In this research, bioreactor anaerobic-aerobic with media bioball is used. The highest removal efficiency of COD took place in anaerobic zones. Bioreactors were operated with the variations of retention time at 24 hours, 18 hours, and 12 hours. The COD removal efficiency for Hydraulic Retention Time (HRT) of 24 hours, 18 hours and 12 hours were found 90.3% (organic loading rate is 15.1 kg COD/m3.day), 84.4% and 76.3% respectively. The experiment showed that the longer of the hydraulic retention time (HRT), the higher the removal efficiency could be achieved. These occurred because a longer HRT will extend the contact time between wastewater and microorganisms attached. Therefore, microorganisms have a longer time to degrade organic matter in wastewater. Although the removal efficiency in these three-HRT was found high, the effluent of the reactor was still above the effluent standard based on regulation of Ministry of Environmental Permen LH No. 5/2014. Kinetics using Eckenfelder Equation results R2 equal to 0.9991, n equal to 0.293 and K equivalent to 7.3577 mg/L. Keywords: tofu wastewater, anaerobe, aerobe, bioball, wastewater, treatment, attached growth

Minimisation of excess sludge production in a WWTP by coupling thermal hydrolysis and rapid anaerobic digestion

2005 ◽  
Vol 52 (10-11) ◽  
pp. 255-263 ◽  
Author(s):  
J. Chauzy ◽  
S. Graja ◽  
F. Gerardin ◽  
D. Crétenot ◽  
L. Patria ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Pilot Plant ◽  
Hydraulic Retention Time ◽  
Wastewater Treatment Plants ◽  
Control Line ◽  
Thermal Hydrolysis ◽  
Excess Sludge ◽  
Anaerobic Digesters ◽  
Sludge Production

In many cases, reducing sludge production could be the solution for wastewater treatment plants (WWTP) that here difficulty evacuating the residuals of wastewater treatment. The aim of this study was to test the possibility of minimising the excess sludge production by coupling a thermal hydrolysis stage and an anaerobic digestion with a very short HRT. The tests were carried out on a 2,500 p.e. pilot plant installed on a recycling loop between the clarifier and the actived sludge basin. The line equipped with the full scale pilot plant produced 38% TSS less than the control line during a 10 week period. Moreover, the rapid anaerobic digestion removed, on average, more than 50% of the total COD load with a hydraulic retention time (HRT) of 3 days. Lastly, the dryness of the remaining excess sludge, sanitised by the thermal hydrolysis, was more than 35% with an industrial centrifuge. This combination of thermal hydrolysis and rapid anaerobic digestion equally permits a significant gain of compactness compared to traditional anaerobic digesters.

Symbiotic algal bacterial wastewater treatment: effect of food to microorganism ratio and hydraulic retention time on the process performance

2007 ◽  
Vol 55 (11) ◽  
pp. 165-171 ◽  
Author(s):  
M. Medina ◽  
U. Neis
Keyword(s):  
Growth Rate ◽  
Wastewater Treatment ◽  
Significant Influence ◽  
Retention Time ◽  
Nutrient Removal ◽  
Hydraulic Retention Time ◽  
Process Performance ◽  
Free Swimming ◽  
Effect Of Food ◽  
Total Nitrogen Removal

Algal incorporation into the biomass is important in an innovative wastewater treatment that exploits the symbiosis between bacterial activated sludge and microalgae (Chlorella vulgaris sp. Hamburg). It allows a good and easy algae separation by means of clarification. The effect of process parameters food to microorganisms ratio (F/M) and hydraulic retention time (HRT) on the process performance, evaluated by settleability, microalgae incorporation to biomass and nutrient removal, was studied. HRT hinted at a significant influence in the growth rate of algae, while F/M turned out to be important for stability when algae are incorporated into the biomass. This parameter also affects the total nitrogen removal of the treatment. Stable flocs with incorporated algae and supernatants with low free swimming algae concentrations were obtained at high HRT and low F/M values.

Research on Features of Domestic Wastewater Treatment and Mechanism of Denitrification in Anaerobic MBBR Reactor

2012 ◽  
Vol 455-456 ◽  
pp. 1030-1036
Author(s):  
Hui Zhou Yuan ◽  
Jian Bang Zhao ◽  
Shui Zhou Ke
Keyword(s):  
Wastewater Treatment ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Ammonia Oxidation ◽  
Ph Value ◽  
Domestic Wastewater ◽  
N Concentration ◽  
Domestic Wastewater Treatment ◽  
Anaerobic Ammonia Oxidation ◽  
Nitrification And Denitrification

This paper studied on the treatment of urban domestic wastewater with Anaerobic MBBR in the tropical and subtropical areas in the South of China. The emphasis focused on the effects of the Hydraulic Retention Time (HRT) and pH value to the CODCrconcentration and the NH3-N concentration of the outflow of the reactor. Moreover, the mechanism of denitrification was also explored. The results showed that the mechanism of denitrification of the reactor was found. When HRT was equal to or more than 8h, NH3-N was reduced mainly in the way of short-cut nitrification and denitrification. When HRT was less than 8h, the reactions of short-cut nitrification and denitrification & anaerobic ammonia oxidation both existed in the reactor.

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