Anaerobic Treatment of High Strength Acidic Organic Wastewaters Utilizing the Upflow Sludge Blanket Treatment Process

1985 ◽  
Vol 20 (1) ◽  
pp. 25-41 ◽  
Author(s):  
M. Trudell ◽  
L. van den Berg ◽  
N. Kosaric
Keyword(s):  
Biological Treatment ◽  
Treatment Process ◽  
High Strength ◽  
Anaerobic Treatment ◽  
Synthetic Wastewater ◽  
Effluent Quality ◽  
Loading Rates ◽  
Effluent Recirculation ◽  
Effluent Waste ◽  
Raw Wastewater

Abstract A laboratory bench-scale study was undertaken in order to investigate the anaerobic biological treatment of high-strength acidic organic wastewaters utilizing the Upflow Sludge Blanket (USB) treatment process. A synthetic wastewater was utilized having a pH of 4.2 and consisting primarily of acetic and propionic acids. While operating at substrate loading rates of 1.1 and 2.4 kg COD/kg VSS/d (i.e., 10 and 30 kg COD/m3/d, respectively), the USB treatment process removed in excess of 90 per cent of the total COD present in the raw wastewater, for waste strengths of 2 to 32g COD/L and hydraulic retention times varying between 3.2 and 76.8 hours. The process demonstrated the ability to polish the effluent waste stream to effluent COD concentrations of less than 300 mg/L. The process was able to tolerate hydraulic and waste strength shockloads. No observable deterioration in pH or effluent quality was identified following sudden increases in wastewater concentration (e.g., 4 to 32g COD/L) or decreases in hydraulic retention time (e.g., 25.6 to 3.2 hours). The use of effluent recirculation did not influence treatment efficiency but was necessary in order to partially neutralize the influent low pH wastewater. The results of this research also demonstrate the feasibility of utilizing the USB reactor as the methane forming reactor in a two-stage anaerobic wastewater treatment system. Recommendations are provided concerning the design of such a system.

Soluble microbial product formation during biological treatment of fermentation industry effluent

2000 ◽  
Vol 42 (1-2) ◽  
pp. 111-116 ◽  
Author(s):  
O. Goorany ◽  
I. Oztürk
Keyword(s):  
Molecular Weight ◽  
Biological Treatment ◽  
High Strength ◽  
Anaerobic Treatment ◽  
Product Formation ◽  
Microbial Product ◽  
Treatment Processes ◽  
Industry Effluent ◽  
Aerobic And Anaerobic ◽  
Raw Wastewater

The most important factor that affects the quality of effluents and overall organic matter removal in biological treatment processes is the presence of soluble microbial products (SMP) that are produced during biological treatment and remain in effluent. High strength wastewater from fermentation industry (FIE) was used as a slowly degradable substrate to investigate SMP formation in aerobic and anaerobic treatment. For SMP determination which forms a major part of residual soluble COD of the wastewater, the initial inert soluble COD (SI) was determined. It was found that SI/So is 0.122 and 0.164 for aerobic and anaerobic processes, respectively. During aerobic treatment of FIE for initialCOD (So) values varying between 1540–6645 mg COD/L, SMP are expected to vary within the range of 12.5–8.6% of So, respectively. In anaerobic treatment of the FIE, for values of 2670–6585 mg COD/L, SMP are expected to vary within the range of 9.8–6.2% of So, respectively. Molecular weight distribution analyses of raw wastewater, aerobic and anaerobic treatment effluent indicate that in both systems the effluent of FIE presents similar molecular weight fractions and are very high compared to raw wastewater.

scholarly journals A Novel Model with GA Evolving FWNN for Effluent Quality and Biogas Production Forecast in a Full-Scale Anaerobic Wastewater Treatment Process

Complexity ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Zehua Huang ◽  
Renren Wu ◽  
XiaoHui Yi ◽  
Hongbin Liu ◽  
Jiannan Cai ◽  
...  
Keyword(s):  
Neural Network ◽  
Wastewater Treatment ◽  
Treatment Process ◽  
Biogas Production ◽  
Anaerobic Treatment ◽  
Production Rates ◽  
Wastewater Treatment Process ◽  
Effluent Quality ◽  
Anaerobic Wastewater Treatment ◽  
Novel Model

The anaerobic treatment process is a complicated multivariable system that is nonlinear and time varying. Moreover, biogas production rates are an important indicator for reflecting operational performance of the anaerobic treatment system. In this work, a novel model fuzzy wavelet neural network based on the genetic algorithm (GA-FWNN) that combines the advantages of the genetic algorithm, fuzzy logic, neural network, and wavelet transform was established for prediction of effluent quality and biogas production rates in a full-scale anaerobic wastewater treatment process. Moreover, the dataset was preprocessed via a self-adapted fuzzy c-means clustering before training the network and a hybrid algorithm for acquiring the optimal parameters of the multiscale GA-FWNN for improving the network precision. The analysis results indicate that the FWNN with the optimal algorithm had a high speed of convergence and good quality of prediction, and the FWNN model was more advantageous than the traditional intelligent coupling models (NN, WNN, and FNN) in prediction accuracy and robustness. The determination coefficients R2 of the FWNN models for predicting both the effluent quality and biogas production rates were over 0.95. The proposed model can be used for analyzing both biogas (methane) production rates and effluent quality over the operational time period, which plays an important role in saving energy and eliminating pollutant discharge in the wastewater treatment system.

Development of a Pretreatment Program to Improve Biological Treatability of High Strength and Toxic Industrial Wastewater

1994 ◽  
Vol 29 (9) ◽  
pp. 29-37 ◽  
Author(s):  
A. Brenner ◽  
S. Belkin ◽  
A. Abeliovich
Keyword(s):  
Industrial Wastewater ◽  
Biological Treatment ◽  
Treatment Process ◽  
Control Program ◽  
High Strength ◽  
Small Scale ◽  
Waste Streams ◽  
Wastewater Stream ◽  
Biological Treatability ◽  
Biological Treatment Process

A biological treatment process has been suggested as the main treatment stage for a high (organic) strength industrial wastewater stream, discharged by several chemical industries within a large industrial park. Treatability studies have indicated that the wastes contain a fraction of toxic and non-biodegradable organic matter, which limits the implementation of a conventional biological treatment process for the combined wastewater stream. Therefore, an in-plant control program including waste segregation and process-specific pretreatments is proposed. A protocol that enables selection of waste streams amenable to biological treatment and identification of problematic streams requiring pretreatment is presented and demonstrated. It includes simplified laboratory procedures used for chemical and toxicological characterization of source streams originating in various processes. The results can be used for the development of a pretreatment program for problematic waste streams, based upon local small-scale solutions.

Combined biological and physico-chemical treatment of baker's yeast wastewater including removal of coloured and recalcitrant to biodegradation pollutants

2004 ◽  
Vol 50 (5) ◽  
pp. 67-72 ◽  
Author(s):  
M. Gladchenko ◽  
E. Starostina ◽  
S. Shcherbakov ◽  
B. Versprille ◽  
S. Kalyuzhnyi
Keyword(s):  
High Strength ◽  
Separation Process ◽  
Iron Chloride ◽  
Uasb Reactor ◽  
Organic Loading ◽  
Cultivation Medium ◽  
Loading Rates ◽  
Physico Chemical ◽  
Yeast Wastewater ◽  
Raw Wastewater

The UASB reactor (35°C) was quite efficient for removal of bulk COD (62-67%) even for such high strength and recalcitrant wastewater as the cultivation medium from the first separation process of baker's yeasts (the average organic loading rates varied from 3.7 to 10.3 g COD/l/d). The aerobic-anoxic biofilter (20°C) can be used for removal of remaining BOD and ammonia from strong nitrogenous anaerobic effluents; however, it suffered from COD-deficiency to fulfil denitrification requirements. To balance the COD/N ratio, some bypass of raw wastewater should be added to the biofilter feed. The application of iron chloride coagulation for post-treatment of aerobic effluents may fulfil the discharge limits (even for colour mainly exerted by hardly biodegradable melanoidins) under iron concentrations around 200 mg/l.

scholarly journals Conversion of organic compounds into biogas on a full scale brewery WWTP using IC reactor

2019 ◽  
Vol 116 ◽  
pp. 00095
Author(s):  
Katarzyna Umiejewska
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
High Strength ◽  
Anaerobic Treatment ◽  
Full Scale ◽  
Brewery Wastewater ◽  
Organic Components ◽  
Before And After ◽  
Biological Transformation ◽  
Raw Wastewater

Wastewater from breweries usually contains high levels of organic components, which are generally easily biodegradable. Ideally, the mainstream method of brewery wastewater treatment is based on biological transformation, which have been reported to be effective in efficiently reducing COD concentration. Anaerobic digestion technology plays an important role in the treatment of high strength wastewater [1]. The benefit of the process is biogas production and recovering the energy. The main goal of the paper is to present the results of a full-scale research performed in a brewery WWTP in 2016. Wastewater from brewery containing COD, a priority pollutant of organic components, is treated in IC reactor. The biogas produced during the anaerobic digestion is transformed into heat. Total COD and soluble COD were measured 5 days a week in wastewater before and after anaerobic reactor. In raw wastewater, average total COD was 5226 mg/L with the percentage share of soluble COD 89.4%. As a result of anaerobic treatment 83,7% reduction of total COD and 92.9% reduction of soluble COD were obtained. The average daily biogas production was 4089 m3/d.

Combined Anaerobic/Aerobic Treatment of Peroxide Bleached TMP Mill Effluent

1994 ◽  
Vol 29 (5-6) ◽  
pp. 381-389 ◽  
Author(s):  
W. J. B. M. Driessen ◽  
C.-O. Wasenius
Keyword(s):  
Biological Treatment ◽  
Pulp Mill ◽  
Anaerobic Treatment ◽  
Aerobic Treatment ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Loading Rates ◽  
Volumetric Loading ◽  
Extensive Pilot

In this paper combined anaerobic/aerobic treatment is illustrated by two examples at integrated pulp and paper mills with peroxide bleached TMP pulp production. The concept of combined biological treatment is to treat the more polluted effluents from the TMP pulp mill in an anaerobic reactor and subsequently to mix them with the less concentrated effluent, for treatment by an aerobic process. Extensive pilot research was done to confirm the feasibility of anaerobic treatment of peroxide bleached TMP mill effluent COD removal efficiencies of 55-60% were achieved at volumetric loading rates of up to 20 kg/m3/d. Possible toxic effects from peroxide could easily be neutralized by removal in a preacidification tank. Long term full scale experience proved that combined anaerobic aerobic treatment is an attractive and reliable method for treatment of peroxide bleached TMP mill effluent.

Effect of the dosage of ferroferric oxide on batch anaerobic treatment of high strength synthetic wastewater

2017 ◽  
Vol 92 ◽  
pp. 152-158 ◽  
Author(s):  
Qidong Yin ◽  
Zhenhu Hu ◽  
Yuepeng Sun ◽  
Bo Li ◽  
Guangxue Wu
Keyword(s):  
High Strength ◽  
Anaerobic Treatment ◽  
Synthetic Wastewater ◽  
Ferroferric Oxide

Treatment of phenolic wastewater using agricultural wastes as an adsorbent in a sequencing batch reactor

2003 ◽  
Vol 47 (10) ◽  
pp. 41-47 ◽  
Author(s):  
K.-M. Lee ◽  
P.-E. Lim
Keyword(s):  
Rice Husk ◽  
Sequencing Batch Reactor ◽  
Treatment Process ◽  
Batch Reactor ◽  
Nitrogen Atmosphere ◽  
Synthetic Wastewater ◽  
Effluent Quality ◽  
Adsorption Capacities ◽  
Biodegradation Process ◽  
Phenolic Wastewater

The objective of this study is to investigate the potential of the activated rice husk to be used as an alternative adsorbent to powdered activated carbon (PAC) in the simultaneous adsorption and biodegradation processes under sequencing batch reactor (SBR) operation to treat synthetic wastewater containing phenol, p-methylphenol, p-ethylphenol and p-isopropylphenol. The rice husk (PRH) was activated by pyrolysis at 600°C for 5 hours in a nitrogen atmosphere. Using the Langmuir model, the limiting adsorption capacities of PRH for the phenols were found to vary from 0.015-0.05 of those of PAC. The SBR reactors with and without adsorbent addition were operated with fill, react, settle, draw and idle periods in the ratio of 4:6:1:0.75:0.25 for a cycle time of 12 hours. For phenolic wastewater containing, 1,200 mg/L phenol, 1,200 mg/L p-methylphenol, 800 mg/L p-ethylphenol and 650 mg/L p-isopropylphenol, it was found that the biodegradation process alone was unable to produce effluent of quality which would satisfy the discharge standards of COD ≤ 100 mg/L and phenol concentration ≤1 mg/L. The addition of PAC in the ratio of PAC/phenolic compound at 0.095 g/g for phenol, 0.119 g/g for p-methylphenol, 0.179 g/g for p-ethylphenol and 0.220 g/g for p-isopropylphenol, can improve the effluent quality to satisfy the discharge standards. Equivalent treatment performance was achieved with the use of PRH at dosages of 2-3 times higher than those of PAC for all the phenolic wastewater studied. The increased adsorption capacity of PRH shown in the treatment indicates bioregeneration of the adsorbed surface during the treatment process.

Application of anaerobic-uf membrane reactor for treatment of a wastewater containing high strength particulate organics

1994 ◽  
Vol 30 (12) ◽  
pp. 307-319 ◽  
Author(s):  
Hideki Harada ◽  
Kiyoshi Momonoi ◽  
Shinichi Yamazaki ◽  
Satoshi Takizawa
Keyword(s):  
Membrane Reactor ◽  
Membrane Separation ◽  
Cross Flow ◽  
Biomass Concentration ◽  
High Strength ◽  
Synthetic Wastewater ◽  
Permeate Flux ◽  
Total Strength ◽  
Methanogenic Activity ◽  
Loading Rates

A cross-flow ultrafiltration (UF) membrane separation was applied to anaerobic process for treatment of a wastewater containing high proportion of particulate COD. A synthetic wastewater with the total strength of 5000 mg COD·1−1 consisting of soluble and particulate COD (cellulose) in the ratio of 1:1 was fed to the reactor. The reactor was operated for 190 days at two loading rates, i.e. 1.5 and 2.5 kg COD·m−3·d−1. More than 98% of COD removal was consistently achieved throughout the duration, and the system was furthermore likely to accommodate much higher loading. Although the permeate COD was always kept at less than 80 mg COD·1−1, soluble COD of reactor broth accumulated up to 1200 mg COD·1−1. The biomass concentration saturated around 15 000 mg ML VSS·1−1. There was no tendency for cellulose to accumulate in the reactor over the whole period, which constituted only 1-2% of the total solids retained in the reactor. The methanogenic activity of the sludge increased 3.4 times for H2/CO2 and 10 times for acetate after 40 days operation. Afterwards, however, a further cultivation caused declines to 50% of the respective peak values for both substrates, because of a low sludge loading. The methanogenic activity using cellulose as a test substrate also exhibited a similar tendency. The membrane permeate flux deteriorated significantly with the cultivation time, owing to the change in rheological properties of the reactor mixed liquor that had been caused not only by increment of MLSS but also by accumulation of soluble high molecular organics.

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