Sewage denitrification performance and sludge properties variation with the addition of liquid from perishable organic anaerobic fermentation

2021 ◽  
Vol 341 ◽  
pp. 125821
Author(s):  
Zihan Zhu ◽  
Yanyan Guo ◽  
Youcai Zhao ◽  
Ruina Zhang ◽  
Yi Yu ◽  
...  
Keyword(s):  
Anaerobic Fermentation ◽  
Sludge Properties

The effects of anaerobic fermentation on dehydrated sludge

2013 ◽  
Vol 67 (11) ◽  
pp. 2630-2636
Author(s):  
Haowen Lu ◽  
Ruihua Dai ◽  
Yan Liu ◽  
Anan Song ◽  
Xiang Liu
Keyword(s):  
Short Chain Fatty Acid ◽  
Anaerobic Fermentation ◽  
Oxygen Demand ◽  
High Concentration ◽  
Acid Yield ◽  
Fermentation Time ◽  
Nitrogen Ratio ◽  
Soluble Chemical Oxygen Demand ◽  
Sludge Properties ◽  
Main Factor

Dehydrated sludge with two concentrations of total suspended solids (high: 50 g/L TSS; low: 20 g/L TSS) were studied for 20 d to investigate the effects of anaerobic fermentation on sludge properties. The results showed that the soluble chemical oxygen demand (SCOD) of high-concentration sludge was 16.53 g/L, much higher than that from the low one. The SCOD/total nitrogen ratio of high-concentration sludge varied from 8 to 14.29 g/g, indicating that the sludge could serve as a carbon source for biological denitrification. High-concentration sludge showed a short-chain fatty acid yield of 11.29 g COD/L, much higher than that from low-concentration sludge. The specific resistance of the sludge to filtration (SRF) increased with fermentation time. The quantity of low-speed centrifugation substances (LSCS) was the main factor that influenced the reduction of dehydration. The correlation coefficient between the SRF and protein content in the LSCS layer was significantly positive.

Methane generation during anaerobic fermentation of four livestock slurries

2010 ◽  
Vol 18 (3) ◽  
pp. 632-636
Author(s):  
Jin-Cai SHI ◽  
Xin-Di LIAO ◽  
Yin-Bao WU
Keyword(s):  
Anaerobic Fermentation ◽  
Methane Generation

Creation of Plasmidless and Markerless Escherichia coli Succinate Producing Strain and Evaluation of its Biosynthetic Potential during Utilization of Lignocellulosic Sugars

2020 ◽  
Vol 36 (2) ◽  
pp. 3-11
Author(s):  
O.A. Zhuravliova ◽  
Т.А. Voeikova ◽  
A.Yu. Gulevich ◽  
V.G. Debabov
Keyword(s):  
Escherichia Coli ◽  
Succinic Acid ◽  
Plant Biomass ◽  
Anaerobic Fermentation ◽  
Basic Research ◽  
Acid Fermentation ◽  
Mixed Acid ◽  
Gene Coding ◽  
Lignocellulosic Sugars ◽  
Basic Research Project

The plasmidless and markerless Escherichia coli succinate producing strain SGM2.0Pyc-int has been engineered and characterized. The strain has the inactivated main mixed-acid fermentation pathways due to the deletions of ldhA,poxB, ackA,pta, and adhE genes, constitutively expresses the genes of the aceEF-lpdA operon encoding components of pyravate dehydrogenase complex, and possesses the chromosomally integrated Bacillus subtilis pycA gene coding for pyruvate carboxylase. The capacity of the strain to synthesize succinic acid in course of dual-phase aerobic-anaerobic fermentation with lignocellulosic sugars as substrates was studied. The SGM2.0Pyc-int strain synthesized succinic acid from glucose, xylose, and arabinose with a molar yields of 1.41 mol/mol, 1.18 mol/mol, and 1.18 mol/mol, respectively, during the anaerobic production stage. The constructed strain has great potential for developing efficient processes for the succinic acid production from plant biomass-derived sugars. Escherichia coli, fermentation, arabinose, glucose, xylose, succinic acid. The work was supported by a Grant from the Russian Foundation for Basic Research (Project no. 18-29-14005).

Operational Results of Melting System for Sewage Sludge

1991 ◽  
Vol 23 (10-12) ◽  
pp. 1773-1781 ◽  
Author(s):  
Daisaku Yashiki ◽  
Tadahiro Murakami
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Melting Furnace ◽  
Effective Utilization ◽  
History Of ◽  
Sludge Properties ◽  
Operation Results

Sludge melting furnaces have been applied recently to the treatment of a great deal of sludge generated from the sewage treatment plant. In this report, an explanation is provided of the history of system introduction, outline of treatment flow, sludge properties, operation results and effective utilization of slag generated at the reflector melting furnace, which began operation in July 1988 at the Futakami Sewage Treatment Plant in Toyama Prefecture. The melting furnace almost totally satisfies the needs of its design, and the properties of the generated melted slag exhibit the features that fully enable its effective utilization.

Effect of the Surface Characteristics of Seed on Copper Precipitation

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2141-2143 ◽  
Author(s):  
Y. Wang ◽  
P. R. Anderson
Keyword(s):  
Surface Area ◽  
Surface Characteristics ◽  
Sludge Dewatering ◽  
Seed Surface ◽  
Copper Precipitation ◽  
Precipitation System ◽  
Sludge Properties ◽  
Precipitation Ph ◽  
Preliminary Study

Two types of seed with different surface area are used in a precipitation system to evaluate the effectiveness of seed surface characteristics on sludge dewatering properties. We expect that the surface area of the seed will stongly affect the sludge properties. The preliminary study shows that the seeded system has a lower precipitation pH and lower supersaturation level.

Effect of addition of anaerobic fermented OFMSW (organic fraction of municipal solid waste) on biological nutrient removal (BNR) process: preliminary results

1998 ◽  
Vol 38 (1) ◽  
pp. 327-334 ◽  
Author(s):  
P. Pavan ◽  
P. Battistoni ◽  
P. Traverso ◽  
A. Musacco ◽  
F. Cecchi
Keyword(s):  
Nutrient Removal ◽  
Fermentation Process ◽  
Organic Waste ◽  
Anaerobic Fermentation ◽  
Pilot Scale ◽  
Biological Nutrient Removal ◽  
Organic Fraction ◽  
P Release ◽  
Pure Methanol ◽  
P Removal

The paper presents results coming from experiments on pilot scale plants about the possibility to integrate the organic waste and wastewater treatment cycles, using the light organic fraction produced via anaerobic fermentation of OFMSW as RBCOD source for BNR processes. The effluent from the anaerobic fermentation process, with an average content of 20 g/l of VFA+ lactic acid was added to wastewater to be treated in order to increase RBCOD content of about 60-70 mg/l. The results obtained in the BNR process through the addition of the effluent from the fermentation unit are presented. Significant increase of denitrification rate was obtained: 0.06 KgN-NO3/KgVSS d were denitrified in the best operative conditions studied. -Vmax shows values close to those typical of the pure methanol addition (about 0.3 KgN-NO3/KgVSS d). A considerable P release (35%) was observed in the anaerobic step of the BNR process, even if not yet a completely developed P removal process.

Recovery of bioplastics from municipal solids and food waste through an anaerobic fermentation platform

2017 ◽  
Vol 2017 (7) ◽  
pp. 4310-4314
Author(s):  
Eirene A Pavlakis ◽  
Ramya Ahuja ◽  
Shashwat Vajpeyi ◽  
Kartik Chandran ◽  
Wendell Khunjar ◽  
...  
Keyword(s):  
Food Waste ◽  
Anaerobic Fermentation
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