Settleability and dewaterability of sewage sludge with modified diatomite
In this study, cationic polyacrylamide (CPAM)-modified diatomite and cetyl trimethyl ammonium bromide (CTAB)-modified diatomite were synthesized and used as conditioners for sewage sludge dewatering. The effects of these two types of modified diatomite on the dewaterability and settling performance of the activated sludge were …
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Diatomite: Its Characterization, Modifications and …
Diatomite products are used in a variety of ways, such as reinforcing, stiffening and hardening of organic solids, reducing adhesion between solid surfaces, increasing …
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Groundwater dewatering optimization in the Shengli no. 1 …
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 ...
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Diatomite enhanced dynamic membrane technology …
Dynamic membrane technology was enhanced by diatomite addition for sludge pre-dewatering and backwash wastewater recycling. A stable filtration flux of …
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Dewatering of Chlorella pyrenoidosa using a …
The aims of this study are to investigate the performances of both the diatomite dynamic membrane (DDM) technology, used for algae dewatering during a …
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Diatomite Dynamic Membrane Fouling …
Abstract: Combined microalgal and membrane filtration could effectively treat aquaculture wastew-ater; however, the membrane fouling induced by extracellular organic matter …
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Research on Multi-Objective Optimization Model of …
This study focuses on optimizing the foundation pit dewatering scheme using the foundation pit dewatering theory and the principles of multi-objective optimization. It explores the development of a multi-objective optimization model and efficient solution technology for foundation pit dewatering. This research focuses on the …
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Preparation of low-cost functionalized diatomite …
Abstract. A low-cost functionalization method was used to treat diatomite, and an efficient adsorbent for ammonia nitrogen was prepared by optimizing the functionalization …
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Magnetic-Nanoflocculant-Assisted Water–Nonpolar Solvent Interface …
Exploitation of magnetic flocculants is regarded as a very promising energy-saving approach to microalgae harvesting. However, its practical applicability remains limited, mainly because of the problem of the postharvest separation of magnetic flocculants from microalgal flocs, which is crucial both for magnetic-flocculant recycling and high-purity …
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An approach utilizing the Response Surface Methodology …
Saudi Arabian's natural diatomite samples were subjected to physical adsorption–desorption characterizations using Brunauer-Emmet-Teller (BET) and the Barrett-Joyner-Halenda (BJH), performed under heating of 140 °C for different periods of hours: 6, 12, 18, and 24 h, to create a central optimization design with surface areas …
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Synthesis and application of biomimetic material inspired by diatomite …
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 ...
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Aerobic granular sludge development using …
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
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Settleability and Dewaterability of Sewage Sludge with Modified Diatomite
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 ...
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Research on the coagulant aid effects of modified diatomite …
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 ...
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Groundwater dewatering optimization in the Shengli no. 1 …
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 …
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Enhancing the photocatalytic elimination of acephate
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.
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Enhanced Dewatering of Activated Sludge by Skeleton …
Sludge dewatering is the fundamental process of sludge treatment. Environmentally friendly and efficient sludge conditioning methods are the premises of sludge to achieve dehydration reduction and resource utilization. In response to sewage plant sludge dehydration, fly ash (FA), polymerized aluminum chloride (PAC), and …
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Dewatering of Chlorella pyrenoidosa using diatomite …
The diatomite dynamic membrane (DDM) was utilized to dewater Chlorella pyrenoidosa of 2 g dry weight/L under continuous-flow mode, whose ultimate algae concentration ranged from 43 g to 22 g dry weight/L of different culture time.The stable flux of DDM could reach 30 L/m 2 h over a 24 h operation time without backwash. Influences …
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Valorization of diatomaceous earth as a sustainable eco …
The use of natural, eco-friendly coagulant-flocculants in wastewater treatment can help to reduce suspended particles in a way that includes less exhaustible materials with minimal adverse effects on the environment. Hence, this study is to investigate raw diatomaceous earth (diatomite) as a sustainable ecological coagulant to reduce colloids and …
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Optimization of heat-sealing properties for
Optimization of heat-sealing properties for antimicrobial soybean protein isolate film incorporating diatomite/thymol complex and its application on blueberry packaging ... Ltd. (Shanghai, China). Diatomite (CAS number 6), sodium hydroxide, glycerol and ethanol were all in analytical reagent grade and were obtained …
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Diatomite Dynamic Membrane Fouling Behaviour during Dewatering …
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 ...
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Sewage Water Treatment Using Chlorella Vulgaris …
Recovery of wastewater is essential for better management of water resources and can aid in reducing regional or seasonal water shortages. When algae were used to clean wastewater, amazing benefits were guaranteed, such as a decrease in the formation of dangerous solid sludge and the creation of valuable algal biomass through …
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Dewatering of Chlorella pyrenoidosa using a …
The aims of this study are to investigate the performances of both the diatomite dynamic membrane (DDM) technology, used for algae dewatering during …
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Diatomite Dynamic Membrane Fouling Behaviour …
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 ...
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Dewatering of Chlorella pyrenoidosa using a diatomite …
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 …
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Enhanced technology based for sewage sludge deep dewatering…
Sludge enhanced dewatering technology and its coupled processes are prospected. Sludge is an inevitable by product of sewage treatment, and it includes pathogens, heavy metals, organic pollutants and other toxic substances. The components of sludge are complex and variable with extracellular polymeric substances (EPS) being …
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Advanced oxidation processes (AOPs)-based sludge …
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 …
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Efficient photodegradation of paraquat herbicide over …
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 ...
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Dewatering of Chlorella pyrenoidosa using diatomite
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 ...
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Demulsification of Crude Oil-in-Water Emulsions Driven by …
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) ...
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