scholarly journals Comparison of Agro-Wastes For Dewatering Enhancement For Dredged Sludge From Sewers

2021 ◽  
Author(s):  
Xuan Huan Nguyen ◽  
Thi Thuy Pham ◽  
Thi Thanh Huyen Dang ◽  
Thi Ngoc Lan Pham ◽  
Thuy Anh Tran ◽  
...  
Keyword(s):  
Moisture Content ◽  
Rice Husk ◽  
Heavy Metal Concentration ◽  
Peanut Shell ◽  
Sludge Dewatering ◽  
Sewer System ◽  
Waste Reuse ◽  
Dredged Sludge ◽  
Core Powder ◽  
Wastewater Generation

Abstract With the increasing wastewater generation from domestic and industrial activities due to the rapid economic development, the generation of sludge, in particular dredged sludge from municipal sewer system, has been an issue in developing countries. This study evaluated the enhancement of sewer’s sludge dewatering via mixing the sludge with different agro-wastes, including corn core powder, rice husk powder, bagasse powder and peanut shell powder. The addition of these agro-waste powders helped decrease the sludge’s moisture contents up to 17% after mixing with the ratio of 1:3, 1:5 or 1:7. Statistical analysis revealed the impacts of both additive types and mixing ratio on moisture content reduction. Among the four types of agro-waste, rice husk was shown to be the best additive to dredge sludges with highest reduction of heavy metal concentration and moisture content. The addition of agro-waste powders to enhance the dewatering of sludges is quite promising in the context of promoting waste reuse and energy saving.

Evaluation of Municipal Sludge Drying and Dewatering with Respect to Sludge Volume Reduction

1990 ◽  
Vol 22 (12) ◽  
pp. 153-161 ◽  
Author(s):  
Maryla Smollen
Keyword(s):  
Moisture Content ◽  
Treatment Strategies ◽  
Vacuum Drying ◽  
Municipal Sludge ◽  
Moisture Retention ◽  
Sludge Dewatering ◽  
Sludge Treatment ◽  
Energy Inputs ◽  
Retention Characteristics ◽  
Sludge Drying

A number of parameters that influence sludge dewatering behaviour have been identified, but there is a lack of consensus which of these are of the greatest concern in sludge treatment strategies. Moisture retention characteristics were obtained from vacuum drying of centrifuged sludge samples to subdivide moisture into immobilised, physically and chemically bound fractions. Physically bound moisture is responsible for unsatisfactory dewatering by centrifugation. Polyelectrolyte releases some of the immobilised water, but simultaneously increases the physically bound moisture content which gives rise to large energy inputs during mechanical dewatering. Commonly used dewaterability measurements do not appear to be linked to moisture retention characteristics.

The effect of alkali treatment on rice husk moisture content and drying kinetics

2014 ◽  
Vol 70 ◽  
pp. 468-475 ◽  
Author(s):  
Alireza Bazargan ◽  
Tesfalet Gebreegziabher ◽  
Chi-Wai Hui ◽  
Gordon McKay
Keyword(s):  
Moisture Content ◽  
Rice Husk ◽  
Alkali Treatment ◽  
Drying Kinetics

scholarly journals KUALITAS PAPAN PARTIKEL BERDASARKAN KOMPOSISI SEKAM PADI DAN KAYU SENGON DENGAN VARIASI KADAR PEREKAT

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Dendi Prayoga ◽  
. Dirhamsyah ◽  
. Nurhaida
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Rice Husk ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Solid Content ◽  
Particle Board ◽  
Rice Husks ◽  
Wood Processing

This research aimed to examine the physical and mechanical properties of particle boards based on the composition of raw materials and adhesive content and know the treatment of the composition of raw materials and the best adhesive content and meet the standard JIS A 5908-2003. The research was conducted at Wood Workshop Laboratory, Wood Processing Laboratory Faculty of Forestry,Tanjungpura University and Laboratory of PT. Duta Pertiwi Nusantara Pontianak. The adhesive used is Urea Formaldehyde with 52% Solid Content. Comparison of the composition of rice husks and sengon varies namely rice husk 50%: sengon 50%, rice husk 60%: sengon 40% and rice husk 70%: sengon 30%  and variations in the levels of UF adhesives, namely 14% and 16%, with target density 0,7 gr/cm3. The particleboard was 30 cm x 30 cm x 1 cm Pressing at temperature 140oC for 8 minutes, with  pressure of 25 kg/cm2. The research results of the study of density and moisture content meet the standards JIS A 5908-2003. The best particle values of rice husk and sengon  with composition a ratio of  rice husk 50%: sengon 50% , 16% adhesive content  16%, with density value of  0,7072 gr/cm3, moisture content 9,1949 %, thick development 12,3210 %, water absorption 68,8270 %, MOE 12110,7273 kg/cm2, MOR 161,0025 kg/cm2, firmness sticky 1,9320 kg/cm2, screw holding strength 62,3124 kg.Keywords : adhesive, composition, particle board, rice husk, sengon

Study on the effect of chitosan conditioning on sludge dewatering

2019 ◽  
Vol 79 (3) ◽  
pp. 501-509 ◽  
Author(s):  
Jin Zhang ◽  
Qing Hu ◽  
Jie Lu ◽  
Shuang Lin
Keyword(s):  
Moisture Content ◽  
Extracellular Polymeric Substances ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Organic Polymer ◽  
Sludge Dewatering ◽  
Sludge Treatment ◽  
Residual Sludge ◽  
Sludge Cake ◽  
Polymer Flocculant

Abstract The difficulty of residual sludge dehydration is the major problem in sewage treatment. The reduction of moisture content in sludge can reduce the sludge volume significantly and is conducive to the subsequent disposal of sludge. As an organic polymer flocculant, chitosan (CTS) is widely used in water and waste water treatment. In this study, CTS was used in sludge treatment to improve the sedimentation and dehydration properties of sludge. When treated with CTS, the moisture content of sludge cake decreased from 85.9% to 83.0%, the SV30 decreased to about 1/2, and the sludge volume reduced to 82.9%. Further analysis showed that the zeta potential (ζ-potential) of the sludge changed from negative value to positive value, and the D50 of the sludge was larger than that of the raw sludge. In addition, when the moisture content of the sludge cake was reduced to the lowest, the concentration of extracellular polymeric substances (EPS) and SCOD was the largest and the |ζ| decreased to the lowest. CTS improved the dehydration and sedimentation performance of sludge mainly by factors of electrical neutralization, adsorption bridging and dissolution of EPS.

scholarly journals Feasibility of using fallen tea leaves as litter in broiler rearing

2012 ◽  
Vol 41 (1) ◽  
pp. 52-54
Author(s):  
S Chakma ◽  
MY Miah ◽  
A Ara ◽  
MH Kawsar
Keyword(s):  
Body Weight ◽  
Moisture Content ◽  
Rice Husk ◽  
The Body ◽  
Tea Leaves ◽  
Saw Dust ◽  
Wood Shavings ◽  
Wood Shaving ◽  
Ad Libitum ◽  
The Cost

One hundred eighty straight run day old Cobb-500 broilers were reared on rice husk, sawdust, wood shaving and chopped tea leaves litter up to 35 days of age. The broilers were fed ad libitum. At 35 days the body weight of chicken reared on sawdust attained the highest body weight (p<0.01) than other litters. FCR was the best on saw dust. The moisture content of different litters did not differ significantly. Oocyst population in rice husk was found to be higher (p<0.01) than those on other litters, except those reared on wood shaving. Moisture content of litters and oocyst population were positively correlated at 14 and 35 days and negatively correlated at 21 and 28 days of age. The litter cost per broiler and per kg broiler was the highest on rice husk (RH), intermediate on sawdust (SD), Wood shavings (WS) and the lowest on chopped fallen tea leaves (CFTL). It was concluded that it may be possible to minimize the cost of litter by using CFTL.http://dx.doi.org/10.3329/bjas.v41i1.11978

scholarly journals Characteristics of Smoldering on Moist Rice Husk for Silica Production

2021 ◽  
Vol 14 (1) ◽  
pp. 317
Author(s):  
Shengtai Yan ◽  
Dezheng Yin ◽  
Fang He ◽  
Junmeng Cai ◽  
Thomas Schliermann ◽  
...  
Keyword(s):  
Moisture Content ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Rice Husk ◽  
Silica Content ◽  
Muffle Furnace ◽  
High Quality

In order to assess the possibility of silica production via smoldering of moist rice husk, experiments of washed (moist) rice husk (7 kg with moisture content of 51%) in a newly designed smoldering apparatus was performed. The temperature inside the fuel bed during smoldering was recorded, and characteristics of ash were analyzed. Results showed that the highest temperature in the middle of the naturally piled fuel bed was about 560.0 °C, lower than those in most of combustors. Some volatiles from the lower part of the fuel bed adhere to its upper ash during piled smoldering. Silica content and specific surface area of ash from smoldering of washed (moist) rice husk were 86.4% and 84.9 m2/g, respectively. Compared to our experiments, they are close to smoldering of unwashed rice husk (89.0%, 67.7 m2/g); different from muffle furnace burning (600 °C, 2 h) of washed (93.4%, 164.9 m2/g) and un-washed (90.2%, 45.7 m2/g) rice husk. The specific surface area is higher than those from most industrial methods (from 11.4 to 39.3 m2/g). After some improvements, the smoldering process has great potential in mass product of high quality silica directly from moist rice husk.

scholarly journals Thermochemical Characterization of Rice Husk (Oryza Sativa Linn) for Power Generation

2020 ◽  
Vol 20 (2) ◽  
pp. 184
Author(s):  
Nikdalila Radenahmad ◽  
Md Sumon Reza ◽  
Muhammad S. Abu Bakar ◽  
Abul K. Azad
Keyword(s):  
Energy Source ◽  
Power Generation ◽  
Oryza Sativa ◽  
Moisture Content ◽  
Rice Husk ◽  
Biomass Gasification ◽  
Heating Value ◽  
A Value ◽  
Pellet Density

Rice husk is biomass that can be utilized as fuel for biomass gasification as a renewable energy source. In this paper, thermochemical methods were used to determine the higher heating values, moisture content, bulk density, pellet density, microstructure, and elemental composition of Thai Rice Husk (Oryza Sativa Linn). The heating energy was analyzed using a bomb calorimeter, which showed a higher heating value of 15.46 MJ/kg. Determination of pellet density through rice husk powder pelletization exhibited a value of 1.028 g/cm3, while moisture content was 5.017 wt%. The heating value and moisture content revealed good agreement with the literature values, indicating the potentiality of rice hush for energy generation. Scanning electron microscopy (SEM) showed that the raw rice husk and its ash have similar porosity types but different bulk structure.  Elemental analysis using energy dispersive X-ray (EDX) indicated that rice husk contains O, Si, C while O and C percentages were drastically decreased during combustion. The obtained heating value and moisture content proved that rice husk could be used as a bio-energy source in biomass gasification for power generation.

scholarly journals Production, Characterization, and Evaluation of Pellets from Rice Harvest Residues

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 479 ◽  
Author(s):  
Cristina Moliner ◽  
Alberto Lagazzo ◽  
Barbara Bosio ◽  
Rodolfo Botter ◽  
Elisabetta Arato
Keyword(s):  
Moisture Content ◽  
Rice Straw ◽  
Rice Husk ◽  
Mechanical Performance ◽  
Chemical Properties ◽  
Quality Standards ◽  
Operational Conditions ◽  
Diametral Compression ◽  
Physical Chemical ◽  
Physico Chemical

Pellets from residues from rice harvest (i.e., straw and husk) were produced and their main properties were evaluated. Firstly, rice straw pellets were produced at lab scale at varying operational conditions (i.e., load compression and wt % of feeding moisture content) to evaluate their suitability for palletization. Successively, rice straw and husk pellets were commercially produced. All the samples were characterized in terms of their main physical, chemical, and physico-chemical properties. In addition, axial/diametral compression and durability tests were performed to assess their mechanical performance. All the analyzed properties were compared with the established quality standards for non-woody pellets. In general, rice straw pellets presented suitable properties for their use as pelletized fuels. Rice husk pellets fell out of the standards in recommended size or durability and thus preliminary treatments might be required prior their use as fuels.

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