Straw Fiber Research Articles

Characterization of lignin and hemicellulose degrading bacteria isolated from cow rumen and forest soil: Unveiling a novel enzymatic model for rice straw deconstruction

Application of greener pretreatment technology using robust ligninolytic bacteria for short duration to deconstruct rice straw and enhance bioethanol production is currently lacking. The objective of this study is to characterize three bacterial strains isolated from the milieux of cow rumen and forest soil and explore their capabilities of breaking down lignocellulose – an essential process in bioethanol production. Using biochemical and genomic analyses these strains were identified as Bacillus sp. HSTU-bmb18, Bacillus sp. HSTU-bmb19, and Citrobacter sp. HSTU-bmb20. Genomic analysis of the strains unveiled validated model hemicellulases, multicopper oxidases, and pectate lyases. These enzymes exhibited interactions with distinct lignocellulose substrates, further affirmed by their stability in molecular dynamic simulations. A comprehensive expression of ligninolytic pathways, including β-ketoadipate, phenyl acetate, and benzoate, was observed within the HSTU-bmb20 genome. The strains secreted approximately 75–82 U/mL of cellulase, xylase, pectinase, and lignin peroxidase. FT-IR analysis of the bacterial treated rice straw fibers revealed that the intensity of lignin-related peaks decreased, while cellulose-related peaks sharpened. The values of crystallinity index for the untreated control and the treated rice straw with either HSTU-bmb18, or HSTU-bmb19, or HSTU-bmb20 were recorded to be 34.48, 28.49, 29.36, 31.75, respectively, which are much higher than that of 13.53 noted for those treated with the bacterial consortium. The ratio of fermentable cellulose in rice straw increased by 1.25-, 1.79-, 1.93- and 2.17-fold following treatments with HSTU-bmb18, HSTU-bmb20, HSTU-bmb19, and a mixed consortium of these three strains, respectively. These aggregative results suggested a novel model for rice straw deconstruction utilizing hydrolytic enzymes of the consortium, revealing superior efficacy compared to individual strains, and advancing cost-effective, affordable, and sustainable green technology.

Characterisation and thermal improvement of adobe walls from earth-straw lightweight panels

Soil as a building material has great potential in terms of low embodied energy, although the great diversity of soils means that more research is needed to characterise them with precise values. In addition, their high thermal transmittance is one of the main drawbacks of earths, so the incorporation of agrowastes could imply a reduction of thermal conductivity without any harm to the embodied energy. Three types of agrowastes have been evaluated: long and short wheat straw fibres and a sawdust. These three fibres were mixed with barbotine to reduce the amount of solid material in the mixture. These panels were compared with the performance of a 20-cm-thick adobe wall. The thermal transmittance of the materials was analysed and the results showed that panel 2 with short wheat straw fibres performed well as a thermal insulation board with a thermal conductivity of λ = 0.05 W/mK.Graphical abstract

Valorization of paddy straw through development of PLA-paddy straw fibre reinforced composites and their physical, morphological, mechanical and thermal characterization

Valorization of paddy straw through development of PLA-paddy straw fibre reinforced composites and their physical, morphological, mechanical and thermal characterization

A flame-retardant corn straw brick (FRCSB): Thermal stability, flammability and flame-retardant mechanism

The use of corn straw in brick is significant for the utilization of agricultural waste and the improvement of brick’s properties. This research investigated the thermal stability, flammability, and the flame-retardant mechanism of flame-retardant corn straw brick (FRCSB). The results show that the FRCSB could stand the test of heat treatment, and has good flame retardant properties. The occurrence temperature of chemical reactions was rose, and the occurrence moment of chemical reactions was postponed due to the calcium carbonate barrier on the surface of FRCSB and the air untouchable corn straw fiber well covered with calcium hydroxide. The growth of crevices destroyed the FRCSB surface, leading to the pyrolysis of deeper corn straw fiber and calcium hydroxide, weight, dimensions, color changes, and promoting the thermal mass exchange between the FRCSB and the air. The strong alkali environment provided by calcium hydroxide enables the corn straw fiber to maintain its own characteristics for a long time, and then plays the role of support and connection, which promotes the performance of FRCSB during heat treatment.

Pre-treated corn straw fiber for fiber-reinforced concrete preparation with high resistance to chloride ions corrosion

Chloride ions erosion is a negative factor for concrete sustainable usage. Fiber addition is a potential solution, which promotes a tight concrete structure formation resulting in the resistance of chloride ions. Corn straw is a kind of crop waste widely sourced that can be used as sustainable concrete reinforcement material. The traditional recycling method of corn straw including burnt as straw ash is not environment friendly. This work aims to pre-treat corn straw fiber (CSF) by some convenient methods (untreated, water-treated, alkali-treated) and add treated CSFs directly into concrete to prepare fiber-reinforced concrete with excellent mechanical properties and high resistance ability to chloride ions. The component content of different treated CSFs was tested to study the fibers composition and microstructure changes. The heat of hydration, compressive strength, and flexural strength were tested to study the hydration degree and the effect of different treated CSFs on the concrete mechanical performance. The rapid chloride permeability (RCPT) and chloride migration (RCM) tests were designed to study the reinforced concretes chloride ions resistance ability change. In addition, to further explore the mechanism of mechanical performance and chloride ions resistance ability change, water absorption rate (WAR) and mercury intrusion porosity (MIP) were tested to provide more supporting information from the micro-level. It is concluded that CSF treated by Na2SiO3 has the least impurities and a rougher surface with a larger specific surface area bonding with the cement substrate. Compared to the original concrete, the compressive strength of CSF concrete, WT-CSF concrete, and NT-CSF concrete increased by 15.7 %, 17.8 %, and 33.4 % respectively. The results of RCM and RCPT show a decreasing trend with different treated CSFs addition, the NT-CSF concrete shows the greatest decrease with 20.1 %, and 17.5 %, respectively. Except for the rougher surface and less impurities of CSF, the improvement of mechanical performance and chloride ions resistance ability is mainly due to treated CSF, especially the NT-CSF contributes to a denser structure formation based on the MIP and WAR test results. The viscosity of Na2SiO3 solution acts as a binder that helps to tighten the bonding between substrate and CSF. The water adsorbed by CSF and the alkaline environment provided by Na2SiO3 facilitates hydration decreasing the chloride ions migration. At the same time, the cellulose in CSF containing many hydroxyl and carboxyl groups further contributes to the concrete chloride ion resistance improvement due to its weak conductivity and the binding force of ions exchange.

Influence of NaCl Solution External Erosion on Corrosion Resistance of RPC Reinforced with Straw Fiber

Straw fiber, as a kind of waste if not properly treated, will pollute the environment. It can be used in cement-based materials as a plant fiber material. Agricultural solid-waste straw fiber has good tensile properties and is expected to be used as a fiber-reinforced material for reactive powder concrete (RPC) and to improve the corrosion resistance of RPC. In this paper, the ultrasonic velocity through specimens, the electrical resistance, the AC impedance spectroscopy and tafel curve were analyzed. The corrosion resistance of the steel bar under the chloride salt freeze–thaw cycles and dry–wet alternations was systematically studied. The result shows that adding a certain content of straw fiber can improve its corrosion resistance. Under the action of two chloride salt environments, the lowest mass loss rate was 0.82% for the sample with 3% straw fiber content and the mass growth rate of the specimens with 4% straw fiber is the highest aqt 0.9%. In terms of ultrasonic velocity, the lowest loss rate was 5.68% for specimens with fiber content of 2%. The specimens were subjected to 0 dry–wet alternations and freeze–thaw cycles; the highest electrical resistance is 19.96 kΩ when the fiber content is 1% and the lowest electrical resistance is 11.105 kΩ when the fiber content is 2%. Under the dry–wet alternations, the content of straw fiber and its corrosion resistance are: 1% > 4% > 0% > 3% > 2%. Under freeze–thaw cycles, the content of straw fiber and its corrosion resistance were as follows: 1% > 0% > 4% > 3% > 2%.

Durability of Raw Earth Blocks Reinforced with Wheat Straw Fibers

The key drivers of the growing interest in the recovery of local materials, particularly land and waste plants, are low-cost building materials, thermal comfort, decreased energy consumption, and decreased carbon dioxide polluting emissions. This work's primary objective is to test a bio-sourced composite material that takes the form of a block of unfinished soil that has been stabilized with cement and blended with wheat straw. This study is being done with the objective of examining the impact of this fiber at different weight percentages (0, 2, 3%, and 4%) on the mechanical behavior, durability, and thermophysical properties of the produced blocks. The results obtained indicated an increase in thermal conductivity, from 2.75 W/mK for the blocks without wheat straw fiber to 0.398 W/mK for those getting 4% of the wheat straw fiber, signifying an improvement in thermal insulation. While retaining the low performance threshold required by the earth construction standard, this improvement was accompanied by an average decrease in mechanical performance.

Effect of Chemical and Steam Explosion Pulping on the Physical and Mechanical Properties of Sugarcane Straw Pulp Trays.

Sugarcane straw fiber (SSF) samples were prepared by chemical pulping (CP) and steam explosion (STE). CP (5, 10, 15% NaOH + 0.2% w/w anthraquinone at 121 °C for 1 h) and STE pressure (1.77, 1.96, and 2.16 MPa at 220 °C for 4 min) SSF trays were molded with a hydraulic hot-press machine at 120 °C, 7 min, and 1.72 MPa. The yield (%) of SSF from STE (54-60% dry basis (db.)) was higher than CP (32-48% db.). STE trays had greater tensile strength than CP. However, STE's elongation and compression strength was lower than CP tray samples. The trays made from SSF using STE had less swelling in thickness, longer water wetting time, and a higher water contact angle than those made from CP. The micrographs displayed a smaller size of SSF obtained in STE than the CP. The appearance and area of peaks in ATR-FTIR spectra and XRD diffractograms, respectively, revealed that the STE trays had a larger residual lignin content from the lignin study and a lower crystallinity index than the CP trays. Moreover, the lightness values of the STE trays were lower than those of the CP trays due to lignin retention. The study results indicate that CP is the preferred method for producing SSF packaging material with high flexibility and fiber purity. However, when considering the specific SF of 4.28, the STE treatment showed superior physical and mechanical properties compared to CP. This suggests that STE could be an excellent alternative green pulping technique for producing durable biobased trays. Overall, the findings highlight the potential of STE as a viable option for obtaining trays with desirable characteristics, providing a sustainable and efficient approach to tray production.

EXTRACTION AND CHARACTERIZATION OF NATURAL CELLULOSE FIBERS FROM REED STRAW: MORPHOLOGICAL, MICROSTRUCTURAL AND THERMAL PROPERTIES

As an available resource rich in cellulose, agricultural residues have attracted a lot of interest for textile and other applications. Herein, reed straw fiber was obtained from a typical agricultural waste – reed straw – by an alkali-oxygen one-bath process. The effects of the amount of sodium hydroxide and hydrogen peroxide, the treatment temperature and time on the degumming rate were discussed. The optimum technological parameters of the alkali-oxygen one-bath process were found as follows: the dosage of sodium hydroxide was 35 g/L, the dosage of hydrogen peroxide – 30 mL/L, treatment temperature – 85 °C and cooking time – 2 h. Under these conditions, the degumming rate achieved was 54.30%. The prepared fiber will be considered as a promising and sustainable raw material for the textile industry and other applications.

Effects of Nano-SiO2 grafting on improving the interfacial and mechanical properties of concrete with rice straw fibers

As a green and clean product, plant fiber has become a hot spot in the research of concrete. However, the weak interfacial properties of plant fibers with cement matrix restricted the development of plant fiber reinforced concrete. This study intends to prepare rice straw fiber reinforced concrete (RSFRC) grafting by Nano-SiO2 on the surface of rice straw fibers. The interface properties of silica grafted on straw fibers with cement were evaluated by the pull-out test of a single fiber from the cementitious matrix. The mechanical properties and fatigue resistance of RSFRC were investigated and a two-parameter Weibull probability fatigue equation of RSFRC was established. The enhancement mechanism of ITZ was revealed by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) tests. Results show that straw fibers grafted with Nano-SiO2 can momentously improve the mechanical and fatigue properties of RSFRC. The compressive strength, flexural strength, and abrasion resistance of RSFRC were increased by 14.6%, 22.3%, and 87.1%, compared with ordinary RSFRC after 28 days of curing. The specimens with 3% Nano-SiO2 concentration and the addition of 2% rice straw fiber to the cement weight exhibited the best flexural fatigue performance. From the microstructure analysis, Nano-SiO2 can enhance the interfacial properties of straw fibers in cement matrix, decrease the presence of calcium hydroxide and facilitate the formation of calcium silicate hydrate(C-S-H) gel. Beyond that, this research has a positive environmental impact on lowering the carbon footprint in concrete from using agriculture-based waste materials to extend the service life of infrastructures.

Advanced investigation of the interphase and degradation behavior of biocomposite pots prepared from straw fibers and the resin with enhanced degradability by keratin

This study proposed an eco-friendly method to prepare biocomposite pots using straw fiber and hydrolyzed keratin (HK)-modified urea-formaldehyde (UF) resin, and investigated their interphase and degradation behavior in depth by nanoindentation (NI). The results showed that HK was successfully grafted onto UF resin molecular structure with epoxy group as intermediate, which increased the molecular weight and rheological properties of the resin. Moreover, the mechanical properties and degradability of the biocomposite pots were also improved. When 6 wt% HK was added (RS-K6EUF), the degradation rate of the biocomposite pot after 6 months of soil burial was increased by 44.31% compared to the blank pot (RS-UF). Furthermore, the study on the degradation behavior of the interphase indicated that the degradation rate of RS-UF mainly depended on the fiber, while RS-K6EUF was more affected by fiber-resin interphase. This research endeavor significantly advances the fundamental understanding of the degradation mechanisms of biocomposites.

Optimization of Manufacturing Parameters and Experimental Study of Rice Straw Fiber-Based Plant Fiber Seedling Pots

In order to improve and alleviate environmental pollution caused by the disposal of seedling pots, a rice straw fiber-based headed vegetable seedling pot material, which is suitable for mechanical transplantation and biodegradable, was studied. Used rice straw as the main raw material, a five-factor and five-level (1/2 full implementation) quadratic regression orthogonal rotation central of rotation combination test method. The experimental factors included the beating degree of rice straw fiber, quantity, the proportion of rice fiber, neutral sizing agents, and wet strength agent mass fraction. The performance evaluation index included dry and wet tensile strength, burst strength, tear strength, air permeance, and degradation period. The results showed that when the parameter combination of the beating degree of rice straw fiber was 50 ± 1°SR, the quantity was 87.5 ± 4 g/m2, the proportion of fiber in rice was 70%, the neutral sizing agents mass fraction was 1 ± 0.25%, and the wet strength agent mass fraction was 1.5 ± 0.1%. The dry tensile strength was ≥ 1.8 kN·m−1, the wet tensile strength was ≥ 0.7 kN·m−1, the burst strength was ≥ 140 kPa, the tear strength was ≥ 350 m·N, the air permeance was ≤ 1.33 μm/Pa·s, and the degradation period was ≤ 80 d. The dry tensile strength reduction rate was 0.0274 kN/(m·d) and the wet tensile strength reduction rate was 0.0113 kN/(m·d), during the nursery period [30, 40], while the dry tensile strength was ≥ 1 kN·m−1 and the wet tensile strength was ≥ 0.4 kN·m−1 during the transplanting period.

Effect of Chemical Treatment on Rice Straw Fiber Surface and Properties of Straw/Polylactic Acid Composites

ABSTRACT In this work, rice straw fibers were modified using NaOH, KBM-403, and tetraethyl orthosilicate (TEOS), and the changes in the surface groups of the straw fibers before and after the modification were analyzed by infrared testing. Straw/polylactic composite were prepared by hot pressing, and the effects of the modifiers used on the properties of these blends were studied by conducting mechanical and thermal performance tests. The results showed that the tensile strength of the straw fiber composites modified by NaOH and KBM-403 increased by 20% and 21.2%, respectively, compared with that of the unmodified composite, whereas the tensile strength of the TEOS-modified fiber did not increase significantly. The flexural strengths of the composites increased by 10.2%, 11.1%, and 13.2%. The impact strength increased by 38.5%, 7.6%, and 7.6%. The results of thermal analysis show that initial and maximum thermal decomposition temperatures of the composite materials increased, indicating that the modified composite materials had a higher thermal stability. These blends are a kind of potential material for structural applications such as interiors, drywell and partitions for furniture.

Toughening effect and mechanism of rice straw Fiber-reinforced lime soil

Lime-stabilized soil used for subgrade is prone to brittle damage under loading because of low toughness. Based on this phenomenon, the toughening effects of anticorrosive rice straw fibers on the lime-stabilized soil and its internal mechanism have been studied in this paper. Different fiber contents (0.2 wt%, 0.6 wt%, 1.0 wt%) and fiber lengths (0–10 mm, 10–20 mm, 20–30 mm) were studied. Three-point bending tests, unconfined compressive strength tests and triaxial compression tests were conducted on the rice straw fiber-reinforced lime soil. Energy absorption, deformation index, and brittleness index were evaluated under flexure, compression, and shear. The toughness change from energy, deformation, and strength was studied based on these. The toughening mechanism of fiber reinforcement was analyzed from the mechanism of fiber-soil interaction, the energy absorption threshold of the damage process, the damage pattern of specimens and the length of the crack propagation path. The results showed that with the increase in fiber content and fiber length, the energy absorption and deformation index of the damage process increased while the brittleness index decreased. The brittle damage pattern was improved, and the toughness increased. The fibers connect the soil particles on both sides of the fracture surface through the bridging effect, form a three-dimensional reinforcement network to restrict the soil particle movement and consume a lot of energy during the interaction with soil, which causes the increase in the energy absorption threshold of soil. Thus, the toughness of the lime-stabilized soil is improved.

Comparison of biodegradable chitosan-based composite films reinforced by different micron-sized plant fibers for food packaging

To provide a fully degradable food packaging film with excellent performance, a chitosan (CS)-based film containing micron-sized plant fibers was prepared by the casting method. With the addition of different plant fibers—wheat straw fiber (WF), maize straw fiber (MF), rice straw fiber (RF), and sisal fiber (SF), a significant improvement in mechanical, water resistance, water vapor barrier, and thermal properties was observed. By comparison, the most significant enhancement effect was observed in CS/SF-based film. The tensile strength and elongation at break of this film were 58.44 MPa and 14.42%, respectively. Moreover, it exhibited excellent properties such as the highest water contact angle (118°), a moisture absorption rate of 5.14%, a low water vapor transmission rate (110.73 g·m-2·d-1), and high thermal stability. Considering the sustainability and attractive physical properties, the improved films showed great potential for food packaging.

The Acoustic Performance of Natural Composites in Reducing Stress Levels: Textile Industry

The porous characteristics of recycled natural fibres make them suitable for use as acoustic materials. Straw and water hyacinth fibres are natural materials that can potentially be used as composites in damping devices. This study evaluated the acoustic performance of two types of reinforced composites containing natural fibers (water hyacinth and rice straw) and gypsum adhesives in reducing stress levels in the textile industry. The evaluation was carried out through laboratory tests using impedance tubes and direct testing in a textile factory to reduce the stress level of production machine workers and operators. Rice straw and water hyacinth fibres were thoroughly mixed in proven mass ratios of 10% and 30% with water and gypsum plaster as a binder. The mixture was pressed into a mould at a pressure of 3 MPa before being heated in an oven at 900ºC for 5 hours. Perforations measuring 4 to 8 mm in diameter were then made at equal distances on the panels. Acoustic panel performance tests were carried out with impedance tubes according to ISO 10534-2 standards at sound frequencies ranging from 0 to 6400 Hz. Field tests were also conducted at a textile factory, with each machine unit generating a sound source of 100 to 110 dB. Heart rate data was collected, and noise measurements were carried out before and after the panels were installed in the area around the operating machines. The results showed that the rice straw-gypsum composite with four perforations performed the best, achieving an α coefficient of 1.0 at a frequency of 1500 Hz and an NRC of 0.50, indicating effective noise reduction. The installation of acoustic panels around the noise source in the textile industry reduced noise levels by up to 9.8 dB and was found to affect workers' heart rates, indicating reduced stress levels. The questionnaire results also showed a significant effect on the stress levels of workers. The use of natural fibers in composite materials has the potential to be an eco-friendly and sustainable solution for soundproofing applications. Doi: 10.28991/CEJ-2023-09-06-02 Full Text: PDF

Wood fibres as additives in mortars: a sustainable reinforcement

In mortars, the use of fibres has been diachronically a commonly used technique. In Ancient Greece, wood and straw fibres were particularly used to increase volume stability in clay and lime mortars. Overtime, with the evolution of technology, natural fibres were replaced by modern materials like polypropylene, steel, glass and carbon fibres. Recently, the climate change and the strong demand for independence from non-renewable mineral resources have urged the search for alternative ways to utilize bio-materials to produce innovative, high value-added products. The wood waste material, coming from loggings or trunks mechanical processing, constitutes valuable bio-degradable, non-toxic material of low environmental impact that could be utilized as reinforcements to produce advanced wood polymer composites. In the current study, fibres of two widely available wood species (black pine and beech) have been used (1-2 cm length). The fibres were added in lime-based and cement-based mortars in proportion 1.5% v/v of the mortar. Physical, thermal and mechanical properties were tested at the age of 28 and 90 days, while at fresh state, workability of the mixtures was recorded. It was found that in traditional systems, the formulations with black pine required higher amount of water for the same workability probably due to the higher hygroscopicity of the fibres. This was not the case in cement-based systems. Small reduction of the mechanical properties was recorded, as well as an increase of the water capillary absorption of the bio-fibres reinforced samples. Thermal conductivity was improved probably due to the porosity increase. In all cases, the shape of the samples was retained even after fracture and crack formation. Between the two wood species used, the black pine gave more beneficiary results. In general, wood-fibres revealed a high potential to upgrade the lime- and cement-based mortars performance and be further promoted in the construction sector.

A review on the use of date palm fibers to reinforce earth-based construction materials

The use of natural fibers to reinforce earth construction materials is an old concept. Indeed, for some of these materials such as cob and adobe, the use of plant fibers is a common practice. This fiber reinforcement mainly aims to improve the mechanical behavior of earthen materials and reduce shrinkage cracks. Straw fibers are the most commonly used. But nowadays, the concept of fiber reinforcement has expanded to include fibers from various origins. The focus of this paper will be on the use of date palm fibers in reinforcing earthen building materials. The present review discusses the following axes: the origin of these fibers, their properties, the main treatment techniques applied to them before their use, the earth construction techniques concerned by this type of reinforcement, and the impact of date palm fibers on the earth-based materials’ physical, mechanical and thermal properties. The main results and conclusions can be summarized as follows: the reinforcement of earth-based materials with date palm fibers affects their physical properties by decreasing their dry density and increasing their water absorption capacity as the fiber content increases. Tensile strength and ductility are enhanced when increasing date palm fiber content. Compressive strength can increase but decrease when an optimal fiber content is reached. The addition of palm fibers has also improved the thermal insulation of earthen materials. Regarding the durability of earth-based materials, it does not seem to be affected by date palm fiber reinforcement.

Research on a New Plant Fiber Concrete-Light Steel Keel Wall Panel

With the growing worldwide attention towards environmental protection, the rational utilization of rice straw (RS) has gradually attracted the attention of scholars. This paper innovatively puts forward a solution for rational utilization of RS. A rice straw fiber concrete (RSFC) with good physical and mechanical properties and a rice straw concrete-light steel keel wall panel (RS-LSWP) with low comprehensive heat transfer coefficient and inconspicuous cold bridge phenomenon was designed. Firstly, the preparation method and process of RSFC is described in detail. Then, the physical and mechanical properties of RSFC, such as strength, apparent density, and thermal conductivity were tested. Finally, the thermal properties of the four new types of cold-formed thin-wall steel panels were analyzed using finite element simulation. The results show that the RSFC with a straw length of 5 mm, mass content of 12%, and modifier content of 1% is the most suitable for RS-LSWP. The standard compressive strength, tensile strength, and thermal conductivity of the RSFC are 2.2 MPa, 0.64 MPa, and 0.0862 W/(m·K), respectively. The wall panels with antitype C keel have a low comprehensive heat transfer coefficient and the best insulation effect. This study innovatively provides a technical method for the rational utilization of RS, promotes the application of RS and other agricultural wastes in building materials and the development of light steel housing.

Mechanistic study of the effect of potassium ferrate and straw fiber on the enhancement of strength in cement-based solidified municipal sludge

The high content of organic matter in sludge is the primary reason for the poor solidifying effect and excessive dosage of the cement base. In this study, potassium ferrate and straw fiber are utilized to synergistically enhance the solidifying effect of the cement and elaborate the strength mechanisms. Among them, potassium ferrate was selected to oxidize and crack the structure of organic matter in sludge and consume part of organic matter; straw fiber was used as an adsorption material to absorb some of the organic material and reduce its interference with the cement hydration reaction; the skeleton function of straw fiber in solidified sludge was used to improve the final solidified sludge strength. It is shown that the presence of these two additives significantly improved the cement solidification strength and reduced the moisture content of the solidified body. Moreover, the moisture content and strength followed an obvious linear relationship (adjusted R2 = 0.92), with the strength increasing as the moisture content decreased. After pretreatment with potassium ferrate, the free water content in the dewatered sludge increased by 4.5%, which was conducive to the adequate hydration reaction with cement. The analysis using X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS), and mercury intrusion porosimetry (MIP) revealed potassium ferrate synergizes with straw fibers to promote the production of hemihydrate gypsum and gismondine. However, hemihydrate gypsum, calcium carbonate, and gismondine resulted in structural swelling, which was confirmed by the microscopic morphology and pore structure analysis. However, the adverse effects due to swelling were offset by the increase in strength brought by the above crystalline substances.