Abstract Microbial-induced carbonate precipitation (MICP) is being investigated to repair concrete cracks because of its good durability and compatibility with cementitious matrix. However, during the in-situ application, the repairing often lasts weeks, even months. And the strength regain is quite low. The repairing time is largely …

In this paper, we consider a serial production line consisting of n unreliable machines with n-1 buffers. The objective is to determine the optimal preventive maintenance policy, the optimal selection of machines and the optimal buffer allocation that will minimize the total system cost subject to a given system throughput level. We assume that the mean time …

CaCO 3 based thermal energy storage system is a promising technology for high temperature solar thermal applications. However, this technology is not mature yet, thus it needs more attention. More importantly, the challenges encountered during the reactor design as well as the integration of these systems with solar power plants are …

This paper studies the application of simulation software and integrates system simulation technology and lean theory. Based on the abstract entity of the knuckle arm line, the existing production line simulation model is established by Flexsim simulation software. We use the theory of production line balance to analyze production line through the …

The results show that the CaCO3 with the largest yield and cohesion was obtained when the bacterial concentration was 107 cells/mL and the concentration of urea and calcium was both 0.5 M at 20 °C. This weight loss of bio-CaCO3 was 9.24% under ultrasonic attack. ... Optimization of deposition process for a productive and cohesive …

The final regeneration step showed a 55% conversion of Na2CO3 to CaCO3 at 120 °C under 3 bar and the conversion rate could be improved further by optimization.

The selected experimental parameters for the CaCO3 production step are stirring rate (500–1300) rpm, CO2 gas flow rate (900–2000) mL/min, amount of ammonia (15–35) mL, and glycerol …

[1] The global CaCO 3 budget is constrained by new estimates of standing stocks, fluxes through the water column, and dissolution in the water column and on the sea floor. Previous estimates of carbonate production and export are indistinguishable within a large range of values, 0.4–1.8 Gt PIC yr −1.Globally, excess alkalinity (TA*) and …

In recent years, industrial enterprises are pursuing energy reduction to meet future needs for sustainable globalization and government legislations for green manufacturing. Most existing energy optimization methods for production lines are developed based on system modeling simulation. Thus they cannot reflect the behavior …

This article describes the modeling and design ideas of system optimization. It takes the production line of a car factory in Chongqing for example. According to the production management and simulation theory, we use the simulation software Flexsim to establish the model of painting's key process and use it to analyse the existing congestion bottlenecks …

Abstract. Cellulase-producing bacteria were isolated from soil and identified as Pseudomonas fluorescens, Bacillus subtilIs, E. coli, and Serratia marcescens. Optimization of the fermentation medium for maximum cellulase production was carried out. The culture conditions like pH, temperature, carbon sources, and nitrogen sources …

This research optimizes the mix ratio of nano-TiO2/CaCO3 (NTC)-basalt fiber (BF) composite modified asphalt mixture. Based on the Box–Behnken method and the response surface method, a three-factor and three-level test was designed. The input indicators were the asphalt–aggregate ratio, NTC content, and BF content. The output indicators were …

The model predicts values of CaCO3 production and dissolution in line with recent estimates. The effect of rising pCO2 on CaCO3 production and dissolution was quantified by means of model simulations forced with atmospheric CO2 increasing at a rate of 1% per year from 286 ppm to 1144 ppm. The simulation predicts a decrease of …

April 5, 2024. AI in Manufacturing: Production Line Optimization. Identify bottlenecks: Analyze the production line to pinpoint slow or inefficient steps. Implement automation: Introduce automated machinery for repetitive tasks to increase speed and consistency. Streamline workflows: Organize the production process to minimize delays between …

dicts values of CaCO 3 production and dissolution in line with. recent estimates. The effect of rising pCO 2 on CaCO 3 pro-. duction and dissolution was quantified by means of model. simulations ...

Introduction. Three-dimensional (3D) , also known as additive manufacturing, is a technique for preparing materials or devices with complex or unique three-dimensional structures in a designable way. 1−3 Compared to the traditional manufacturing methods, 3D is more flexible in structural design. By changing the …

Request PDF | Formation of CaCO3 hollow microspheres in carbonated distiller waste from Solvay soda ash plants | For decades, distiller waste and CO2 were not the first choice for production of ...

Optimization of a Multiphase Multiproduct Production Line based on Virtual Cells, Lecture Notes in Engineering and Computer Sc ience: Proceedings of The World Congress on E ngineering 2011,

5.2 Algorithm Steps. Step1: Set the number of initial countries as N and randomly generate N initial countries, that is, there are N balance schemes of the production line. Turn to Step1. Step2: According to the randomly generated countries and the number of countries, the objective function is calculated according to the balance …

Response surface methodology (RSM) and artificial neural networks (ANN) are considered the most efficient way for optimization and modeling studies to design and develop various biosimilars. The primary objective of this study was to create empirical modeling and optimization of media parameters for producing B. halotolerans VSH 09 …

Ersan, Y. C., De Belie, N., & Boon, N. (2015). Microbially induced CaCO3 precipitation through denitrification : an optimization study in minimal nutrient environment.

The problem of optimization assembly lines for rarely repeatable products with low volumes will be addressed in this paper. In this kind of production each product should be treated as a project ...

The optimization problem becomes much harder if the production rate constraint is considered in production line design because the production rate is a nonlinear function of buffer sizes. Our problem includes the production rate constraint and aims at maximizing the profit for the line.

In this research, the product family configuration and smart production line selection are jointly determined with considering GHG emissions, which has not been found in the literature related to low-carbon product design. 2.3. Production line selection. Production line selection has a strategic importance for manufacturing companies.

Decreased stability. Reduced part costs from volume purchasing. Lost opportunity for innovation. Reduced management costs and required resources. Increased dependence on your current supply chain partners. Opportunities to build upon an established relationships. A team that isn't the best fit for the new product.

It can be concluded that Ralstonia eutropha H16 is a suitable bacterium for simultaneous activation of urea hydrolysis and nitrate reduction for improving the CaCO3 precipitation and it can be studied later, on activation of multiple metabolic pathways in bacteria-based self-healing concrete.

Download Citation | On Aug 1, 2023, Kaiyuan Li and others published A study on self-shielding effect of CaCO3 in cable pyrolysis using gas product analysis and PSO optimization | Find, read and ...

In the process industry, optimizing production lines for long-term efficiency requires real-time monitoring and analysis of operation states to fine-tune production line parameters. However, the complexity in operational logic and the intricate coupling of production process parameters make it difficult to develop an accurate mathematical …

Optimization and characterization of biodiesel from waste cooking oil using modified CaO catalyst derived from snail shell ... Production BD from WCO's is also environmentally friendly because it recycles used cooking ... This study is in line with the previous report from Sinaga M et al. and Mohamed M et al. [36, 57], which showed …

Response surface method of experimental design was applied to optimize the mechanical properties of polypropylene (PP)/nanoclay/CaCO3 hybrid ternary nanocomposite using three different levels of melt flow index (MFI) of PP, nanoclay, and CaCO3 contents. The samples were prepared by melt mixing in a lab scale corotating …