Research on Developing Carbon Resource with Primary Sludge by Two-Stage Complete Mixing Ferment Process

2011 ◽  
Vol 236-238 ◽  
pp. 381-384
Author(s):  
Bai Hang Zhao ◽  
Jun Li ◽  
Jian Ren
Keyword(s):  
Carbon Source ◽  
Retention Time ◽  
Methanogenic Bacteria ◽  
Two Stage ◽  
Primary Sludge ◽  
Separation Effect ◽  
Sludge Retention Time ◽  
Carbon Resource

Two-stage complete mixing ferment process was used for developing carbon source with primary sludge. The effects of hydrolysis retention time (HRT) and sludge retention time (SRT) on the ferment system were studied. The results showed that the effective HRT was between 32 h and 36 h, and the effective SRT was between 4 d and 7 d. Under above conditions, the average effluent SCOD was in the range of 980 mg/L and 1180 mg/L, and supernatant MLSS was in the range of 50 mg/L and 80 mg/L. And then, the separation effect of the sludge thickener was clearly. Acidogenic bacteria and methanogenic bacteria could be separated effectively in the conditions.

scholarly journals A Modified Activated Sludge Model No.3 (ASM3) for Membrane Bioreactor (MBR) with an Emphasis for Solids Hydrolysis

2018 ◽  
Vol 53 ◽  
pp. 04039
Author(s):  
Xinyue Jiang ◽  
Bin Xu
Keyword(s):  
Carbon Source ◽  
Activated Sludge ◽  
Retention Time ◽  
Membrane Bioreactor ◽  
Activated Sludge Model ◽  
Modeling Approach ◽  
Sludge Retention Time ◽  
Subsequent Effect ◽  
Hydrolysis Of ◽  
Denitrification Process

The previously assumed “inert” organics measured by respirometric method has been reported to be hydrolysable under long sludge retention time (SRT) configuration such as membrane bioreactor(MBR). The sludge production under long SRT has also shown to be lower than the standard activated sludge model (ASM) prediction. The hydrolysis of “inert” organics can provide the extra carbon source for denitrification. The current modeling approach has not yet included this aspect. In this study, a modified ASM3 was developed to account for the hydrolysis of “inert” organics and subsequent effect on the denitrification process under long SRT.

Preliminary Investigation of Primary Sludge Hydrolysis

2017 ◽  
Author(s):  
Regimantas Dauknys ◽  
Aušra Mažeikienė ◽  
Anna Haluza ◽  
Illia Halauniou ◽  
Victor Yushchenko
Keyword(s):  
Organic Matter ◽  
Retention Time ◽  
Nutrient Removal ◽  
Preliminary Investigation ◽  
Biological Nutrient Removal ◽  
Primary Sludge ◽  
Sludge Retention Time ◽  
Hydrolysis Process ◽  
Sludge Hydrolysis ◽  
Hydrolysis Of

One of reasons of non-effective biological nutrient removal from wastewater is lack of readily biodegradable organic matter. This problem could be solved by application of sludge hydrolysis process. The conditions for hydrolysis of primary sludge could be created performing the recirculation of the primary sludge and ensuring the required sludge retention time. In the period of preliminary investigation, the following conditions were created in the primary sedimen-tation tank of Vitebsk WWTP: average sludge recirculation was 4.8 % of the inlet flowrate to the sedimentation tank and average SRT was 5 days. Obtained results showed that hydrolysis process allowed improving the ratio between organic matter and nutrients in wastewater.

Anaerobic stabilisation and conversion of biopolymers in primary sludge—effect of temperature and sludge retention time

2004 ◽  
Vol 38 (4) ◽  
pp. 983-991 ◽  
Author(s):  
Nidal Mahmoud ◽  
Grietje Zeeman ◽  
Huub Gijzen ◽  
Gatze Lettinga
Keyword(s):  
Retention Time ◽  
Effect Of Temperature ◽  
Primary Sludge ◽  
Sludge Retention Time

Research on Removal Effects of Pollutants by the (A/O)4 SBR Process

2013 ◽  
Vol 648 ◽  
pp. 385-388
Author(s):  
Kai Ji ◽  
Na Wei ◽  
Xiao Qing Yu ◽  
Li Ding ◽  
Jing Xiao
Keyword(s):  
Carbon Source ◽  
Removal Efficiency ◽  
Retention Time ◽  
Municipal Wastewater ◽  
Hydraulic Retention Time ◽  
Effluent Water ◽  
Phosphorous Removal ◽  
Sludge Retention Time ◽  
Temperature Ranges

The staged SBR is the process that divides aeration and sedimentation process of conventional SBR into several stages in time, and operates under the conditions of different stages of anaerobic/oxic/anoxic alternation. The experiment mainly discussed the five-stage SBR with useful volume of 12 L for nitrogen and phosphorous removal of synthetic municipal wastewater in the temperature ranges of 15~30°C. Tests revealed that under the condition of hydraulic retention time (HRT) is 8 hours and sludge retention time (SRT) is 15 day, the removal efficiency of COD, NH3-N, TN and TP can reach to 88.9%, 99.61%, 78.9% and 94.21%. The quality of effluent water is good, and don’t need to add Carbon Source through the experiment.

The Effect of PHA on Enhanced Biological Phosphorus Removal

2012 ◽  
Vol 610-613 ◽  
pp. 1343-1348
Author(s):  
Wei Han ◽  
Linjiang Yuan ◽  
Lu Chai ◽  
Kai Zhao ◽  
Guang Zhu Li
Keyword(s):  
Energy Storage ◽  
Carbon Source ◽  
Retention Time ◽  
Phosphorus Removal ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Sludge Retention Time ◽  
Removal Capacity ◽  
Intracellular Energy ◽  
Biological Phosphorus

Used A/O-SBR(anaerobic/aerobic alternating enhanced biological phosphorus removal system) to study carbon source and phosphate accumulating organisms (PAO) intracellular energy storage substance transformation, also studied PAO’s phosphorus removal capacity. PAO could uptake quick degradation organic matters and synthesis polyhydroxyalkanoates(PHA). PHA was a kind of intracellular energy storage substance, its content could affect PAO’s phosphorus removal capacity. When carbon source was plentiful, PAO could synthesis a lot of PHA, phosphorus removal capacity could reach 38.16 mgp/gvss. Sludge retention time could affect PAO synthesis PHA of quantity and structure. Along with the sludge retention time growth, intracellular PHA content was increased, and phosphorus uptake of desired aerobic time continues to decrease, so increasing the phosphorus removal efficiency. When the municipal sewage as carbon source, PHA was mainly composed of PHB(poly-ß-hydroxyvalerate) and PHV(poly-ß-hydroxyvalerate). Along with the sludge retention time prolongation, PAO could synthesis more PHV, PHB content was remain unchanged, PHA composition structure was changed.

scholarly journals Sludge retention time impacts on polyhydroxyalkanoate productivity in uncoupled storage/growth processes

2021 ◽  
pp. 149363
Author(s):  
Mariana Matos ◽  
Rafaela A.P. Cruz ◽  
Pedro Cardoso ◽  
Fernando Silva ◽  
Elisabete B. Freitas ◽  
...  
Keyword(s):  
Retention Time ◽  
Growth Processes ◽  
Sludge Retention Time
Sign in / Sign up

Export Citation Format

Share Document