The diatomite dynamic membrane (DDM) was utilized to dewater Chlorella pyrenoidosa of 2g dry weight/L under continuous-flow mode, whose ultimate algae concentration ranged from 43g to 22g dry ...

The aims of this study are to investigate the performances of both the diatomite dynamic membrane (DDM) technology, used for algae dewatering during a long-term (96 h) operation period, and the ...

The results revealed that the addition of diatomite and basalt fiber can significantly increase the VV of asphalt mixture, and reduce γ f and VFA; the optimal performance of the asphalt mixture at high- and low-temperature are achieved with 14% diatomite, 0.32% basalt fibers and 5.45% asphalt-aggregate ratio. Moreover, the porous …

Abstract: Combined microalgal and membrane filtration could effectively treat aquaculture wastew-ater; however, the membrane fouling induced by extracellular organic matter …

Under optimized operation conditions, the experimental removal eficiency of paraquat reached 97.1 and 80% using UV and simulated solar light, respectively. Moreover, the reusability results confirm the sustained activ-ity of the T25-W5/Di nanocomposite. Keywords TiO2-WO3 · Type II heterojunction · Diatomite · Paraquat photodegradation ...

2.2.scCO 2 treatment procedure. Based on previous researches, pressure, temperature and time were the major parameters that influenced the dewatering effect of SS by scCO 2 [17, 18].A series of single-factor bench-scale experiments and an orthogonal experiment were conducted at various combinations of pressure (10, 15, 20 MPa), …

The efficiency of the CPAM-modified diatomite was better than that of the CTAB-modified diatomite in improving the settleability and dewaterability of sludge. The results indicated that specific resistance to filtration (SRF) was decreased from 8.52 × 10 12 to 0.92 × 10 12 m/Kg, and the water content in the remaining sludge cake after pumping ...

The inner and outer layer structures of 4 mm (diameter) diatomite AGS were visually examined via SEM after 50 days of cultivation. This method explores the whole granular structure, involving surface morphologies, bacterial clusters, as well as filamentous and extracellular polymeric … See more

Fig. 1 (a) shows the flux and R c changes during the first 240 min of filtration. Similar to the results of the 24-h operation, the flux change experienced a rapidly declining stage (ΔF>1.0), a slowly declining stage (0.1<ΔF<1.0) and then a comparatively stable stage (ΔF<0.1).The flux decline of the 2-day group was less severe than that of the 6- and 10 …

Diatomite and basalt fiber are often used as two eco-friendly modifiers to enhance the performance of asphalt mixtures [6,7,8,9]. The addition of diatomite and basalt fiber can not only significantly enhance the performance of asphalt mixtures, but also have simpler construction conditions and technologies than some polymer modifiers [7,10,11 ...

The results indicated that specific resistance to filtration (SRF) was decreased from 8.52×10 ¹² m/Kg to 0.92×10 ¹² m/Kg, and the water content in the remaining sludge cake after pumping ...

Further studies showed that the polymer/surfactant adsorbed in diatomite increased sludge dewaterability and improved the sedimentation rate owing to stripping …

Optimization of heat-sealing properties for antimicrobial ... Optimization of heat-sealing properties for antimicrobial soybean protein isolate film incorporating diatomite/thymol complex and its application on blueberry packaging Food Packaging and Shelf Life ( IF 6.429) Pub Date :, DOI: 10.1016/j.fpsl.2021.100690. اقرأ أكثر

Dewatering is recognized as an important method for treating sewage sludge before its disposal. In this paper, the nonionic surfactant Tween-20 was used for the first time to improve the ...

Optimal decision of dewatering of an excavation area in an unconfined aquifer is searched by using the combined optimization-simulation approach. In combining groundwater model with the optimization model, response matrix approach, generated on the basis of linear superposition, is used. MODMAN that calls MODFLOW repeatedly to generate response …

The results indicate that the dewatering optimization procedure developed in this paper can serve as a useful template and framework for solving mining related water problems. Sketch map of ...

Removal of Oil from a Crude Oil-in-Water Emulsion by a Magnetically Recyclable Diatomite Demulsifier. Energy & Fuels 2019, 33 (11), ... Dewatering Bitumen Emulsions Using Interfacially Active Organic Composite Absorbent Particles. ... Fundamentals and process optimization. Journal of Materials Research and Technology 2020, 9 (6) ...

However, natural diatomite used directly as a conditioner cannot fully meet the demands of sludge dewatering and the environment. Pore size distribution, impurity content, and bulk density are the ...

1. Introduction. In tandem with the world's rising population, the number of municipal wastewater treatment plants is increasing year by year. It is estimated that 60 million tons of wet sludge is produced per year in China, and needs extensive treatment facilities for proper handling [1].The large amounts of activated sludge which are …

This study investigated diatomite dynamic membrane (DDM) fouling behaviour during the dew … Combined microalgal and membrane filtration could effectively treat aquaculture wastewater; however, the membrane fouling induced by extracellular organic matter (EOM) during the dewatering process is an issue.

In addition, diatomite-based biomimetic material has a wide variety, different shapes, and an overall size between 10 and 200 µm, which can be regarded as a miniature version of existing industrial catalysts and applied in microreactors for efficient catalyst screening, optimization of reaction conditions, reaction kinetics analysis, and ...

Impacted by groundwater, faults, lithology, and other factors, the slope of the Shengli no. 1 open-pit coalmine has been in a state of instability. Among these factors, groundwater in the quaternary aquifer is considered primary. Thus, an optimum design for dewatering well pumping rates is presented in this paper. A two-dimensional …

The aims of this study are to investigate the performances of both the diatomite dynamic membrane (DDM) technology, used for algae dewatering during a …

NiO nanoparticles were synthesized and modified with Ni 0 in the form of Ni/NiO blend and supported on a porous diatomite substrate, forming hybrid structures of NiO/D and Ni@NiO/D with enhanced photocatalytic performances. The obtained structures were applied for the effective oxidation of acephate pesticides under visible light.

The aims of this study are to investigate the performances of both the diatomite dynamic membrane (DDM) technology, used for algae dewatering during …

Sludge dewatering is an important link in sludge treatment. In practical engineering, the dewatering effect of unconditioned sludge is very poor. The use of advanced oxidation technology can improve sludge dewatering performance, reduce sludge capacity, and remove micro-pollutants, which is beneficial for sludge post …

Dynamic membrane technology was enhanced by diatomite addition for sludge pre-dewatering and backwash wastewater recycling. A stable filtration flux of 168–280 L/(m 2 ⋅h) was achieved in the DM filtration process under gravity−driven mode, which was much higher than achieved with MF. Diatomite−enhanced DM filtration …

Membranes 2021, 11, 945 4 of 17 research: the slime layer, the algae layer, and the diatomite layer [15]. The contents of pro-tein and polysaccharides in the three sublayers were measured by means ...

Diatomite Dynamic Membrane Fouling Behaviour during Dewatering of Chlorella pyrenoidosa in Aquaculture Wastewater ... 18, and 24 hours, to create a central optimization design with surface areas ...