Temperature effect on the anaerobic treatment of potato-processing wastewater

1982 ◽  
Vol 9 (3) ◽  
pp. 549-557 ◽  
Author(s):  
K. C. Lin ◽  
R. C. Landine ◽  
S. Bliss
Keyword(s):  
Temperature Effect ◽  
Methane Production ◽  
Accumulation Rate ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Methane Content ◽  
Potato Processing ◽  
Potato Waste ◽  
Volumetric Rate ◽  
Anaerobic Lagoon

The performance of a laboratory-scale anaerobic lagoon–filter system treating unsettled potato-processing wastewater has been studied under controlled temperature conditions below 20 °C. The wastewater contained approximately 2700 mg/L of chemical oxygen demand (COD) and 1380 mg/L of suspended solids (SS). The system, buffered with lime, was fed continuously; detention times were 7.0 and 1.5 days for the lagoon and filter, respectively. The loading rate was 0.35 kg COD/(m3∙day) based on lagoon volume. There was 100% recycling but no sludge wastage.Between 20 and 10 °C, the system removed approximately 94% of the COD and 95% of SS. Down to 4 °C removals of 85% of COD and 93% of SS were obtained. At 2 °C system failure was imminent. Sludge accumulation rate was highest at 6 °C (0.41 g of SS accumulated per gram SS fed), four times the rate at 20 °C. Total methane production varied from 0.35 m3/kg COD removed at 20 °C down to 0.24 m3/kg COD removed at 4 °C, with a 62% decrease in volumetric rate. Methane content in the gas was 75–84%. The filter had a higher methane production-to-COD removal ratio and a higher methane content than the lagoon. Keywords: anaerobic lagoon, anaerobic filter, temperature effect, potato waste.

scholarly journals Co-digestion of microalgae with potato processing waste and glycerol: effect of glycerol addition on methane production and the microbial community

RSC Advances ◽  
2020 ◽  
Vol 10 (61) ◽  
pp. 37391-37408
Author(s):  
Yanghanzi Zhang ◽  
Gary S. Caldwell ◽  
Philip T. Blythe ◽  
Andrew M. Zealand ◽  
Shuo Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Methane Production ◽  
Processing Waste ◽  
Potato Processing ◽  
Potato Waste

Glycerol as an additional co-substrate enhanced methane yields by up to 128% when co-digestion with microalgae and potato waste.

scholarly journals Comparison of thermophilic and mesophilic anaerobic treatment for potato processing wastewater using a contact reactor

2017 ◽  
Vol 19 (2) ◽  
pp. 318-326 ◽  
Keyword(s):  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Gas Production ◽  
Organic Loading ◽  
Potato Processing ◽  
Loading Rates ◽  
Methane Gas ◽  
Acid Ratio ◽  
Mesophilic Conditions ◽  
Better Than

In this study, different organic loading rates (OLRs) ranging from 1.1 to 5.0 kg COD/m3·day were used to assess the performance of an anaerobic reactor at the optimum mesophilic (35°C) and thermophilic (55°C) temperatures. The methane gas production rate of the thermophilic treatment was higher than that of the mesophilic treatment. The efficiency of chemical oxygen demand (COD) removal was observed to range from 89.12 to 93.20% following the thermophilic anaerobic treatment and from 76.36 to 92.62% following the mesophilic treatment. The average VFA (volatile fatty acid)/alkalinity ratio of the effluent was 0.3 under both thermophilic and mesophilic conditions for all the OLR applications. The HPr/HAc (propionic acid/acetic acid) ratio was calculated as 0.16 and 1.3 for the mesophilic and thermophilic treatments, respectively. For the mesophilic treatment, the average methane gas production was found to be 0.394 m3 CH4/kg CODremoved while it was 0.42 m3 CH4/kg CODremoved for the thermophilic experiment. However, the sludge settleability of the mesophilic treatment was better than that of the thermophilic treatment.

Effects of mixing on anaerobic treatment of potato-processing wastewater

1991 ◽  
Vol 18 (3) ◽  
pp. 504-514 ◽  
Author(s):  
K. C. Lin ◽  
M. E. J. Pearce
Keyword(s):  
Steady State ◽  
Methane Production ◽  
Anaerobic Treatment ◽  
Joint Effect ◽  
Potato Processing ◽  
Anaerobic Reactors ◽  
Mixing Effects ◽  
Mixing Intensity ◽  
Solids Removal ◽  
Steady State Performance

Four laboratory-scale reactors were used to study the effects of mixing intensity and mixing duration on the anaerobic treatment of potato-processing wastewater at 20 °C. The mixing intensities were set at impeller speeds of 0, 20, 50, and 100 rpm. Two mixing durations were studied: 45 and 15 min/h. It was found that both mixing intensities and mixing durations studied and their joint effect significantly affected the steady-state performance of the anaerobic reactors in treating the potato-processing wastewater with respect to organics and solids removals and methane production. Key words: mixing effects, anaerobic treatment, potato-processing wastewater, organics and solids removal, methane production.

Treatment of corn ethanol distillery wastewater using two-stage anaerobic digestion

2016 ◽  
Vol 74 (2) ◽  
pp. 431-437 ◽  
Author(s):  
B. Ráduly ◽  
L. Gyenge ◽  
Sz. Szilveszter ◽  
A. Kedves ◽  
S. Crognale
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Oxygen Demand ◽  
Continuous Phase ◽  
Methane Content ◽  
Microbial Consortia ◽  
Two Stage ◽  
Second Stage ◽  
Conversion Rates ◽  
Distillery Wastewater

In this study the mesophilic two-stage anaerobic digestion (AD) of corn bioethanol distillery wastewater is investigated in laboratory-scale reactors. Two-stage AD technology separates the different sub-processes of the AD in two distinct reactors, enabling the use of optimal conditions for the different microbial consortia involved in the different process phases, and thus allowing for higher applicable organic loading rates (OLRs), shorter hydraulic retention times (HRTs) and better conversion rates of the organic matter, as well as higher methane content of the produced biogas. In our experiments the reactors have been operated in semi-continuous phase-separated mode. A specific methane production of 1,092 mL/(L·d) has been reached at an OLR of 6.5 g TCOD/(L·d) (TCOD: total chemical oxygen demand) and a total HRT of 21 days (5.7 days in the first-stage, and 15.3 days in the second-stage reactor). Nonetheless the methane concentration in the second-stage reactor was very high (78.9%); the two-stage AD outperformed the reference single-stage AD (conducted at the same reactor loading rate and retention time) by only a small margin in terms of volumetric methane production rate. This makes questionable whether the higher methane content of the biogas counterbalances the added complexity of the two-stage digestion.

Treatment of potato-processing waste water by an anaerobic lagoon–filter system

1980 ◽  
Vol 7 (2) ◽  
pp. 373-383 ◽  
Author(s):  
K. C. Lin ◽  
G. J. Brown
Keyword(s):  
Waste Water ◽  
Oxygen Demand ◽  
Processing Waste ◽  
Potato Processing ◽  
Effluent Quality ◽  
Filter System ◽  
Loading Rates ◽  
Anaerobic Lagoon ◽  
Filter Clogging ◽  
Bottom Portion

An anaerobic lagoon–filter system was operated in the laboratory to treat potato-processing waste water at 20 °C and pH 7 under three loading rates varying from 0.149 to 0.719 kg BOD∙m−3 ∙day−1. The overall removals of biochemical oxygen demand (BOD) and suspended solids (SS) were high, in the ranges of 97–98 and 89–97%, respectively. The system was consistently stable in effluent quality despite periods of shock loads and zero input.The optimum loading rates to the lagoon and the filter were 0.3 and 0.4 kg BOD∙m−3∙day−1, respectively. Most of the BOD and SS removals occurred in the bottom portion of the reactors. A base had to be added to the waste water to maintain the pH at 7 for good performance. No lagoon desludging is expected for full-scale operation. Filter clogging is also unlikely under the optimum loading rates.

Improvement of the anaerobic treatment of potato processing wastewater in a UASB reactor by co-digestion with glycerol

2007 ◽  
Vol 30 (5) ◽  
pp. 861-867 ◽  
Author(s):  
Jingxing Ma ◽  
Mariane Van Wambeke ◽  
Marta Carballa ◽  
Willy Verstraete
Keyword(s):  
Anaerobic Treatment ◽  
Uasb Reactor ◽  
Potato Processing

Sludge accumulation and methanogenic activity in an anaerobic lagoon

2000 ◽  
Vol 42 (10-11) ◽  
pp. 247-255 ◽  
Author(s):  
J. Paing ◽  
B. Picot ◽  
J. P. Sambuco ◽  
A. Rambaud
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Anaerobic Degradation ◽  
Volatile Fatty Acids ◽  
Anaerobic Fermentation ◽  
Methanogenic Activity ◽  
Start Up ◽  
Anaerobic Lagoon ◽  
Methane Production Rate ◽  
Sludge Accumulation

Sludge accumulation and the characteristics of anaerobic digestion in sludge had been investigated in a primary anaerobic lagoon. Methanogenic potential of sludge was evaluated by an anaerobic digestion test which measured the methane production rate. Sludge was sampled at several points in the lagoon to determine spatial variations and with a monthly frequency from the start-up of the lagoon to observe the development of anaerobic degradation. Maximum amounts of sludge accumulated near the inlet. The mean methane production of sludge was 2.9 ml gVS–1 d–1. Sludge near the outlet presented a greater methanogenic activity and a lesser concentration of volatile fatty acids than near the inlet. The different stages of anaerobic degradation were spatially separated, acidogenesis near the inlet and methanogenesis near the outlet. This staged distribution seemed to increase efficiency of anaerobic fermentation compared with septic tanks. Methane release at the surface of the lagoon was estimated to be very heterogeneous with a mean of 25 l m–2 d–1. The development of performance and sludge characteristics showed the rapid beginning of methanogenesis, three months after the start-up of the anaerobic lagoon. Considering the volume of accumulated sludge, it could however be expected that methanogenic activity would further increase.

Anaerobic treatment of residual lemon pulp in digesters with semi-continuous feed

2013 ◽  
Vol 67 (3) ◽  
pp. 514-520
Author(s):  
A. R. Navarro ◽  
Z. Lopez ◽  
J. Salguero ◽  
M. C. Maldonado
Keyword(s):  
Industrial Waste ◽  
Animal Feed ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Raw Material ◽  
Comparative Tests ◽  
Economic Problems ◽  
The North ◽  
Potential Applications ◽  
Continuous Feed

Lemon growing areas in the north of Argentina have industries that produce concentrated juice, peel and essential oil and generate a significant amount of liquid and solid waste as lemon pulp. In Argentina, despite the potential applications that the pulp has as animal feed and human and industrial raw material, only 10% is used for these purposes and the rest is discarded into the environment causing many ecological and economic problems. There is little information in the literature on biotechnologies for the treatment of this industrial waste. This paper shows that lemon pulp is a suitable substrate to be treated by anaerobic digestion. We obtained 86 and 92% reduction of chemical oxygen demand in a digester with a semi-continuous feed and retention time of 10 and 20 days respectively and a productivity of 0.406 g CH4/g VS h. Comparative tests showed that pre-digesting the pulp improved the process of digestion and increased biogas generation by 20%.

scholarly journals Theoretical and Experimental Results on the Recovery of Potato Processing Residuals by Anaerobic Digestion

2019 ◽  
Vol 70 (7) ◽  
pp. 2524-2529 ◽  
Author(s):  
Andreea D. Dima ◽  
Carmen Mateescu ◽  
Oana C. Parvulescu ◽  
Eduard M. Lungulescu ◽  
Nicoleta O. Nicula
Keyword(s):  
Anaerobic Digestion ◽  
Gompertz Model ◽  
Economic Feasibility ◽  
Potato Processing ◽  
Biomethane Potential ◽  
Potato Waste ◽  
Cone Model ◽  
Treatment Technologies ◽  
Negative Environmental Impact ◽  
Modified Gompertz Model

Anaerobic digestion of organic matter with high moisture content has proven to be a suitable method for disposal of wet organic residuals with several advantages compared to other treatment technologies. This paper aimed at evaluating the theoretical and experimental biomethane potential of food processing residuals that are responsible for negative environmental impact, with exemplification for the potato processing waste. The biomethane potential is a useful parameter to assess the economic efficiency of anaerobic digestion processes as it can considerably influence the efficiency and the economic feasibility of the energy recovery technologies. Both experimental and theoretical biomethane potentials of potato waste in mesophilic anaerobic digestion as well as biodegradability of the substrate were estimated. Moreover, effects of microalgal extract addition on the digestion of potato waste were examined in an attempt to stimulate the anaerobic digestion. Cone model and a modified Gompertz model were used to predict the dynamics of biomethane production.

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