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.

Potato Processing Wastewater Treatment at Relatively High Loading Rates Using a Unified Anaerobic Fermenter-Filter

1982 ◽  
Vol 17 (1) ◽  
pp. 63-74 ◽  
Author(s):  
R.C. Landine ◽  
G.J. Brown ◽  
A.A. Cocci ◽  
T. Viraraghavan
Keyword(s):  
Wastewater Treatment ◽  
Room Temperature ◽  
Anaerobic Treatment ◽  
Basic Design ◽  
Potato Processing ◽  
Two Stage ◽  
Filter System ◽  
Loading Rates ◽  
Laboratory Bench ◽  
Scale Design

Abstract A laboratory bench-scale study using a unified anaerobic fermenter-filter system (referred to as a BVF-HAF system) was conducted at room temperature over an 8 month period on potato processing wastewater for the purpose of verifying a proposed full-scale design concept. In addition to two-stage anaerobic treatment, the first stage anaerobic effluent (BVF effluent) was subjected to aerobic polishing in a simulated facultative aerated lagoon with a retention of 4 days. The basic design conditions entailed treatment of a clarified potato wastewater with a COD of 7600 mg/L and a retention of 4 d in the BVF (loading 1.71 kg/m3.d). After over-coming an upset condition believed due to toxicity of the vacuum filtrate feed, the model performed well achieving 78.9% COD removal in the BVF plus 5 3.4% in the HAF for a combined total of 90.2%. When the BVF effluent was aerated the combined BVF - aerated lagoon removal reached 94.8%.

Treatment of agricultural drainage water via downflow hanging sponge system for reuse in agriculture

2013 ◽  
Vol 13 (2) ◽  
pp. 403-412 ◽  
Author(s):  
Amr Fleifle ◽  
Ahmed Tawfik ◽  
Oliver C. Saavedra ◽  
Mohamed Elzeir
Keyword(s):  
Suspended Solids ◽  
Oxygen Demand ◽  
Drainage Water ◽  
Treated Wastewater ◽  
Agricultural Drainage ◽  
Organic Loading ◽  
Effluent Quality ◽  
Loading Rates ◽  
Agricultural Drainage Water ◽  
Negative Effect

Treatment of agricultural drainage water (ADW) in a down-flow hanging sponge (DHS) reactor has been investigated for a period of 1 y. The reactor was operated at different hydraulic retention times (HRTs) of 5.26, 2.63, and 1.5 h and corresponding organic loading rates (OLRs) of 2.01, 1.86, and 4.43 kg COD/m3 d, respectively. The results obtained indicated that, decreasing the HRT from 5.26 to 1.5 h negatively affected the chemical oxygen demand (COD) removal. Average COD percentage removal values dropped from 89.3 ± 5.4 to 72.2 ± 16% respectively. Total suspended solids (TSS) concentrations were reduced by 85.5 ± 8.3, 90.4 ± 2.1, and 91.4 ± 4.9 at HRTs of 5.26, 2.63, and 1.5 h, respectively. However, the nitrification efficiency was slightly decreased from 85.2 ± 17.4 to 82 ± 11.4% by decreasing the HRT from 5.26 to 1.5 h and increasing the OLR from 2.01 to 4.43 kg COD/m3 d, respectively. Likewise, reducing the HRT from 5.26 to 1.5 h exerted a slight negative effect on the removal of the total phosphorus (TP). Based on these results it is recommended to operate such a system at a HRT of 2.63 h and OLR not exceeding 2.0 kg COD/m3 d for providing an effluent quality complying with the standards regulating the use of treated wastewater for agricultural purposes.

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.

Extensive nitrogen removal in a new type of airlift reactor

2000 ◽  
Vol 41 (4-5) ◽  
pp. 469-476 ◽  
Author(s):  
C.T.M.J. Frijters ◽  
S. Vellinga ◽  
T. Jorna ◽  
R. Mulder
Keyword(s):  
Waste Water ◽  
Nitrogen Removal ◽  
New Technology ◽  
Pilot Scale ◽  
Airlift Reactor ◽  
Processing Waste ◽  
Potato Processing ◽  
New Type ◽  
Total Nitrogen Removal ◽  
Biological Performance

A new type of CIRCOX® airlift reactor was started-up treating anaerobically pre-treated potato-processing waste water. This type of airlift reactor with biofilms on carrier is an airlift reactor extended with an anoxic compartment to obtain total nitrogen removal. This type of reactor was designed in the early nineties and was tested successfully at pilot-scale on brewery and municipal waste water. The 3 m3 pilot reactor was scaled-up to a size of 130 m3. Both the hydraulics and the biological performance were studied. High liquid velocities and equal concentrations of sludge throughout the whole reactor, indicated that the system was well mixed. Up to 5 kg COD/m3/day was removed. Ammonia was almost completely removed (up to 1.0 kg NH4–N/ m3/day in the aerated compartment). The denitrification efficiency was over 90%. The NOX–N concentration in the effluent never exceeded 6 mg/l. The biofilm layers were extremely dense: 30 g/l of VSS with a sludge volume of 220 ml/l. Therefore the particles had high settling velocities and could easily be retained in the reactor. It can be concluded that this new technology has been scaled-up successfully. With this an aerobic technology is available in which extended treatment and nitrogen removal are accomplished in a very compact system.

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.

New method for enhanced reactivation of anaerobic plants

2016 ◽  
pp. 36-39
Author(s):  
Hans-Joachim Jördening ◽  
Ralph-Matthias Schoth ◽  
Charlotte Pipper ◽  
Runi Egholm
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Control Problem ◽  
Waste Water Treatment ◽  
New Method ◽  
Treatment Results ◽  
Loading Rates ◽  
Drastic Increase ◽  
Expected Increase

A major problem in anaerobic waste-water treatment results from difficulties with the mixing of sludge, when it has settled after periods of standstill. A new method for reactivating those plants is discussed in this paper. In a technical anaerobic plant (volume 9600 m3) a control problem led to a breakdown of the process, connected with a drastic increase of the reactor COD. The load to the reactor was temporarily stopped to remove the inhibiting conditions. Restart with low loading rates and addition of new sludge did not lead to the expected increase in performance. The main problem was to suspend the sludge layer, which was settled on the bottom of the reactor. For activating the sludge layer feed “shots” were added up to three times per day. These shots consisted of volume streams of high loaded waste-water, up to five times bigger than the normal stream at that time and lasting for 1 h. The shots provided the sludge layer much better with substrate and caused biogas formation which itself led to a suspension of bacterial flocs. The same strategy was applied again successfully for reactivating a second anaerobic 10,000 m3 reactor.

Aeration and Water Hyacinths in Waste Stabilization Ponds

1987 ◽  
Vol 19 (12) ◽  
pp. 265-271
Author(s):  
P. R. Thomas ◽  
H. O. Phelps
Keyword(s):  
Biochemical Oxygen Demand ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Substantial Improvement ◽  
Additional Treatment ◽  
Coliform Bacteria ◽  
Effluent Quality ◽  
Stabilization Ponds ◽  
Water Hyacinths

The investigation was based on two facultative stabilization ponds initially designed to operate in parallel, and now receive wastewater in excess of their capacities from a fast expanding housing estate in the Caribbean Island of Trinidad. Because of the deterioration of the effluent quality relative to acceptable standards, an attempt was made to upgrade the ponds using water hyacinths at the early stages. However, from the results, it was clear that the introduction of water hyacinths in the test pond did not lead to any substantial improvement in the effluent because of the high loading on the pond. Therefore the ponds were modified to operate in series with surface aerators installed in the first pond. Initially, the effluent quality was monitored in terms of total suspended solids, volatile suspended solids, biochemical oxygen demand, faecal coliform bacteria, pH and dissolved oxygen with aeration in the first pond and no aquatic plants in the second pond. Although there was a significant improvement in the effluent quality, the values remained above the standards. As a result, water hyacinths were introduced in the second pond and the effluent quality monitored together with aeration in the first pond. The effluent quality improved with total suspended solids and biochemical oxygen demand values both as low as 10 mg/l in certain months, but additional treatment was needed to reduce faecal conforms.

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