Anaerobic digestion of baker's yeast factory effluent using an anaerobic filter and a hybrid digester

Merwe, M. Van Der; Britz, T. J.

doi:10.1016/0960-8524(93)90177-d

Cited by 20 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data demonstrated that the maintenance energy is of the same order of magnitude and practically negligible in the two reactors studied. The methane yield coefficient values obtained for this substrate were similar to those reported in the literature for anaerobic treatments of other food industry wastewaters 63–75…”

Section: Anaerobic Digestion Of Two‐phase Olive Mill Effluents (Tpome)supporting

confidence: 83%

Anaerobic biodegradation of two‐phase olive mill solid wastes and liquid effluents: kinetic studies and process performance

Borja

Rincón

Raposo

2006

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

The new two-phase olive oil mills produce three identifiable and separate waste streams, namely (1) the wash waters from the initial cleansing of the fruit, (2) the aqueous solid residues from the primary centrifugation and (3) the wash waters from the secondary centrifugation. As well as offering process advantages, they also consume less water. Therefore the solid residue, two-phase olive mill solid waste (OMSW), has a high organic matter concentration, giving it an elevated polluting load, and cannot be easily handled by traditional technology which deals with the conventional three-phase olive cake. In addition, the new two-phase olive mill effluents (TPOME) are made up of a mixture of effluents (1) and (3), the total volume of TPOME generated being ∼0.25 dm 3 kg −1 olives processed. This review aims to report the main features and characteristics of two-phase OMSW and TPOME as compared with the classical olive cake and olive mill wastewater (OMW) derived from the three-phase manufacturing process. The advantages and disadvantages of the two-phase decanting process are summarised. The anaerobic digestibility of two-phase OMSW using different influent substrate concentrations is reported. Kinetic studies of anaerobic digestion of two-phase OMSW are also reviewed and summarised, as well as mass balances to predict the behaviour of the reactor and simplified kinetic models for studying the hydrolysis, acidogenic and methanogenic steps of one-and two-stage anaerobic digestion of OMSW. The review also includes the following: assays of anaerobic digestion of wastewaters from the washing of olives, of olive oil and the two together using fluidised beds and hybrid reactors; the kinetics, performance, stability, purification efficiencies and methane yield coefficients.

show abstract

Section: Anaerobic Digestion Of Two‐phase Olive Mill Effluents (Tpome)supporting

confidence: 83%

Anaerobic biodegradation of two‐phase olive mill solid wastes and liquid effluents: kinetic studies and process performance

Borja

Rincón

Raposo

2006

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…There is also literature on gas quality, and in this study, methane concentration was 70% ± 9% higher than the 60-62% methane from brewery effluent reported by Van Der Merwe and Britz (1993) and Bocher et al (2008) but similar to Baloch et al (2007), 62% to 75%, and lower than Leal et al (1998), who reported 80-95% methane from brewery wastewater, suggesting that more data are needed on methane measurements.…”

mentioning

confidence: 57%

Monitoring anaerobic digestion: a 2-year brewery case study

Radu¹,

Blanchard²,

Smedley³

et al. 2014

Journal of Environmental Engineering and Science

View full text Add to dashboard Cite

Operational data from an anaerobic wastewater treatment plant (expanded granular sludge bed (EGSB) reactor) were analysed before and after a defect with the solids separator. The results presented suggest that a newly available method for the analysis of total volatile fatty acids (VFAs) was ideal as a rapid, onsite, operational indicator of reactor stability. These total VFAs were shown to provide an earlier warning of the separator problem than the other rapid routine methods of monitoring digesters such as alkalinity and suspended solids. Chemical oxygen demand (COD) removal, pH and gas yield were not as useful for monitoring because of their slow response. The results are from a high rate reactor; the loads were 18 kg COD/m 3 /d in the first year and 26 in the second with 4·4 d hydraulic retention time.The results for both years of operation demonstrate a 95% conversion of COD into gas with an additional contribution from solids digestion (specific gas yield of 0·4 l methane (CH 4 )/g COD rem ). This high performance was attributed to the solubility of the COD and the efficient EGSB mixing.

show abstract

“…The level of pollution at the disposal point is also indicated by the ''differential temperature ratio test'', i.e. total bacterial count at 22°C: at 37°C [34]. Values obtained (0.2-2.6) were comparable to those recorded earlier [16], being inferior to the recommended 10:1.…”

Section: Discussionmentioning

confidence: 98%

“…3239 kg/day COD and 1148 kg/day BOD. Such enrichment in organic load questions the practise of the direct disposal of the effluent onto water surfaces and strongly recommends pre-treatment through microbial digestion, resulting in successfully reduced COD and sulphate content [33][34][35]. Furthermore, ground water properties can be affected under heavy pollution stress by industrial effluents [36].…”

Section: Discussionmentioning

confidence: 99%

The influence of agro-industrial effluents on River Nile pollution

Ali

Sabae

Fayez

et al. 2011

Journal of Advanced Research

View full text Add to dashboard Cite

The major agro-industrial effluents of sugarcane and starch industries pose a serious threat to surface waters. Their disposal in the River Nile around Cairo city transitionally affected the microbial load. In situ bacterial enrichment (50-180%) was reported and gradually diminished downstream; the lateral not vertical effect of the effluent disposal was evident. Disposed effluents increased BOD and COD, and then progressively decreased downstream. Ammoniacal N was elevated, indicating active biological ammonification and in situ biodegradability of the effluents. In vitro, the nitrogen-fixing rhizobacteria Crysomonas luteola, Azospirillum spp., Azomonas spp. and K. pneumoniae successfully grew in batch cultures prepared from the crude effluents. This was supported by adequate growth parameters and organic matter decomposition. Therefore, such biodegradability of the tested agro-industrial effluents strongly recommends their use for microbial biomass necessary for the production of bio-preparates.

show abstract

Anaerobic digestion of baker's yeast factory effluent using an anaerobic filter and a hybrid digester

Cited by 20 publications

References 10 publications

Anaerobic biodegradation of two‐phase olive mill solid wastes and liquid effluents: kinetic studies and process performance

Anaerobic biodegradation of two‐phase olive mill solid wastes and liquid effluents: kinetic studies and process performance

Monitoring anaerobic digestion: a 2-year brewery case study

The influence of agro-industrial effluents on River Nile pollution

Contact Info

Product

Resources

About