scholarly journals Review on fundamental aspect of application of drying process to wastewater sludge

2013 ◽  
Vol 28 ◽  
pp. 29-43 ◽  
Author(s):  
Lyes Bennamoun ◽  
Patricia Arlabosse ◽  
Angélique Léonard
Keyword(s):  
Wastewater Sludge ◽  
Fundamental Aspect ◽  
Drying Process

Optimization of spray drying process for Bacillus thuringiensis fermented wastewater and wastewater sludge

2010 ◽  
Vol 34 (2) ◽  
pp. 237-246 ◽  
Author(s):  
K. D. Adjallé ◽  
K. D. Vu ◽  
R. D. Tyagi ◽  
S. K. Brar ◽  
J. R. Valéro ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Spray Drying ◽  
Wastewater Sludge ◽  
Drying Process

scholarly journals Determination of the Bacterial Compositions in the Bio-Drying Process of Sewage Sludge from Wastewater

2021 ◽  
Author(s):  
Joseph Ikenna Ubah ◽  
Ogwueleka Tochukwu Chibueze ◽  
C. I Ofeoshi
Keyword(s):  
Sewage Sludge ◽  
Bacterial Communities ◽  
Treatment Plant ◽  
Free Water ◽  
Staining Technique ◽  
Organic Content ◽  
Wastewater Sludge ◽  
Water Evaporation ◽  
Drying Process ◽  
Plate Technique

Abstract The aim of this study is to determine the bacterial compositions during the bio-drying process of sewage sludge. Bio-dried products and sewage sludge were randomly collected from the Wupa wastewater/sludge treatment plant in Idu Industrial area Abuja, Federal Capital Territory, Nigeria. A mixture of sewage sludge and sawdust that were bio–dried and cured before this experiment were composition of the bio–dried product. The bacterial communities were analyzed in the laboratory using Pour Plate Technique to examine the total bacterial present in the sewage sludge bio-drying material (SSBM) and the bacterial were later isolated using other techniques like Oxidase test, Catalase test, Grams Staining technique and Spread Plate Technique. Evaporation of free water and water formation was determined by humidity gauge and moisture-oven drying method. From the results obtained, Acinetobacter was the most abundant bacterial during the initial and final thermophilic phases (43% and 37%) respectively. Bacillus was the most abundant amid the cooling stage (53%). The water evaporation and water generation rate were credited to the degradation of organic content of the SSBM and heat produced by bacterial activities. From this study, there is a clear indication that the bacterial density grades that increase the temperature of the SSBM during the bio–drying process reshaped the bacterial communities.

scholarly journals Computational modeling of biosludge drying

2021 ◽  
Vol 9 (8) ◽  
pp. 219-232
Author(s):  
Nayara Vilela Avelar ◽  
Ana Augusta Passos Rezende ◽  
Antonio Marcos de Oliveira Siqueira ◽  
Cláudio Mudadu Silva ◽  
Angélica de Cássia Oliveira Carneiro
Keyword(s):  
Moisture Content ◽  
Initial Moisture Content ◽  
Wastewater Sludge ◽  
Moisture Distribution ◽  
Drying Process ◽  
Urban Wastewater ◽  
Complex Process ◽  
Simulated Temperature ◽  
Sludge Drying ◽  
Good Agreement

Considerable increases in industrial and urban wastewater sludge generation in recent years require proper treatment, such as thermal drying, and disposal. The sludge drying is a complex process involving simultaneous and coupled heat and mass transfer, which can be modeled by taking into account mass and heat balances, and assuming that water diffuses according to kinetic laws. This research implemented a simulation model for biosludge drying processes to predict the temperature and moisture distribution inside the biosludge, using the COMSOL Multiphysics® simulation program v5.2. A parametric analysis was carried out to determine the effect of initial moisture content on biosludge final temperature and moisture reduction. The simulated temperature and moisture content were experimentally validated and good agreement was observed between the simulation and experimental results. This model is a useful tool to optimize the drying process and develop better strategies for the control of the system.

scholarly journals Drying characteristics of wastewater sludge according to outside air inflow conditions

2018 ◽  
Author(s):  
Sang Hyun Oh ◽  
Ki Ho Park ◽  
Byoung Hyuk Yu ◽  
Sung Il Kim
Keyword(s):  
Thin Film ◽  
Sewage Sludge ◽  
Wastewater Sludge ◽  
Drying Process ◽  
Drying Characteristics ◽  
Inflow Condition ◽  
Materials Used ◽  
Sludge Drying ◽  
Drying Efficiency ◽  
Inflow Conditions

The purpose of this study is to analyze the changes of drying efficiency according to the inflow conditions of outside air into the drying equipment during the drying process in order to reduce the energy used in the drying process of sludge. We conducted the experiment using a vertical thin film dryer. Materials used for the experiment are sewage sludge. As a result of the study, higher drying efficiency was obtained in the case of outside air inflow than in the case of no outside air inflow. In addition, optimum condition of outside air inflow was derived. Keywords: Drying; Sludge; Drying efficiency; Air inflow condition 

Characteristics of WWTP sludge after drying in greenhouse for agricultural purposes

2012 ◽  
Vol 66 (7) ◽  
pp. 1460-1466 ◽  
Author(s):  
Márcia Regina Pereira Lima ◽  
Eliana Zandonade ◽  
Pedro Alem Sobrinho
Keyword(s):  
Sewage Treatment ◽  
Wastewater Sludge ◽  
Metropolitan Region ◽  
Solar Drying ◽  
Drying Process ◽  
Sewage Treatment Plants ◽  
Inorganic Substances ◽  
Regulatory Standards ◽  
Volatile Solids ◽  
Physical Layout

The sludge generated by sewage treatment which meets regulatory standards can be used in agriculture. With this understanding, the focus of this study is the evaluation of the agricultural characteristics and inorganic substances in excess activated sludge, which was subjected to drying in a greenhouse. The variables (factor) evaluated during the drying process were: type of sludge (digested or not digested), addition of lime to the sludge, and the physical layout and rotation of sludge in the greenhouse. The parameters monitored for this assessment were moisture, volatile solids and pH. The greenhouse cover and sides were made of translucent plastic to allow the penetration of solar radiation and prevent water from entering. A impermeable floor was used. The sludge was generated in sewage treatment plants located in the metropolitan region of Grande Vitória, Espírito Santo, Brazil. The solar drying of wastewater sludge in a greenhouse presented satisfactory results.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

Permasalahan Manajemen Usaha Mikro Studi Kasus Pada Pabrik Kerupuk UD. Manunggal Karsa Di Kel. Lebak Bulus Kec. Cilandak Kodya Jakarta Selatan

Liquidity ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Siti Maryama
Keyword(s):  
Organizational Structure ◽  
Financial Institutions ◽  
Raw Materials ◽  
Excess Demand ◽  
Motor Vehicles ◽  
Family Management ◽  
Drying Process ◽  
Earned Income ◽  
Qualitative Descriptive ◽  
Bad Weather

The purpose of the study are to (1) review the main problems faced by the factory of Kepuruk Manunggal Karsa (MK), and (2) assessing the entrepreneur attempts to be able to solve the problems faced. The research was carried out using qualitative descriptive design. The results showed that (1) the lack of supply of raw materials as a result of lack of capital. Sequel is due, the difficulty of the plant to meet consumer demand (excess demand). (2), the system of capital used is circulating capital (capital turnover). Earned income used up to finance the operation of the plant. (3) Innovation has been done in the form of deal with bad weather (rain) as an effort of crackers drying process is by using the oven. (4) There has been no cooperation with financial institutions. (5) There is no organizational structure as a modern factory for traditionally managed by family management. (6) Marketing using modes of transportation carts and motor vehicles.

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