Aerobic granular sludge: the future of wastewater treatment
central to sustainable development. Wastewater is a key element in the water–food–energy nexus, and recovery of resources can link water, nutrient and ... recently developed aerobic granular sludge (GS) process is a better replacement for AS and promises sustainable wastewater treatment for at least the next century. The GS process uses ...Web
اقرأ أكثر
Current Progress, Challenges and Perspectives in the Microalgal
However, the traditional activated sludge technology and aerobic granular sludge often produce a large amount of greenhouse gases, such as CO 2 and methane, in the process of wastewater treatment, which is not conducive to the development of cleaner production and the establishment of a low-carbon energy system. As a new type of …Web
اقرأ أكثر
What is sludge treatment? | Sludge Processing
evaporating the water. Water removal is made easier by modifying the sludge through chemical or thermal treatment. These treatment processes are referred to as sludge conditioning, and act by changing the size and/or other characteristics of the sludge suspended solids. Sludge process types Credit: Judd Water & Wastewater …Web
اقرأ أكثر
Recent development of sludge biochar-based catalysts in …
The development of heterogeneous catalyst based on sludge as raw material has received widespread attention, and the influencing factors of the catalytic process, the reaction process and the stability of the …Web
اقرأ أكثر
Processes | Free Full-Text | Review of Latest Advances in Nature …
The activated sludge process (ASP) is the most widely used biological wastewater treatment system. Advances in research have led to the adoption of Artificial Intelligence (AI), in particular, Nature-Inspired Algorithm (NIA) techniques such as Genetic Algorithms (GAs) and Particle Swarm Optimization (PSO) to optimize treatment systems. …Web
اقرأ أكثر
Challenges of aerobic granular sludge utilization: Fast start-up
A similar process can use to remove nitrogen, but only if the aerobic granular is PN-A. However, there are complex substrates with a high organic and nitrogen load that could remove by AGS with the correct selection of an operational strategy that allows the development and maintenance of nitrifying sludge in AGS.Web
اقرأ أكثر
Activated sludge models at the crossroad of artificial
The introduction of Activated Sludge Models No. 1 (ASM1) in the early 1980s has led to a decade-long experience in applying these models and demonstrating their …Web
اقرأ أكثر
From wasted ferric sludge to valuable waste: a systematic
This article aims to carry out a survey of the alternatives adopted to transform the ferric sludge resulting from advanced, highly polluting oxidative processes into a …Web
اقرأ أكثر
Frontiers | Life cycle assessment of energy consumption and …
With increasing population and urbanization, the amount of municipal sewage sludge generated is huge and growing rapidly. In order to minimize resource inputs and pollutant emissions in the sludge disposal process, it is crucial to carry out an environmental impact analysis and sustainability assessment of different strategies …Web
اقرأ أكثر
Advances in continuous flow aerobic granular sludge: A review
1. Introduction. Aerobic granulation may play an important role in the field of wastewater treatment due to the advantages over the conventional activated sludge system, such as denser aggregate structure, better solid-liquid separation, higher biomass concentration (Liu et al., 2009, Buaisha et al., 2020) or even its ability to treat wastewater …Web
اقرأ أكثر
Sequencing Batch Reactors for Water Treatment
The key development of the activated sludge process involved aerating sewage and, instead of disposing of the sludge produced, retaining the sludge for mixing with a fresh batch of raw sewage. Because the retained sludge had been previously oxidized, it was considered to be "activated," and hence was given the name "activated …Web
اقرأ أكثر
Application of Integrated Fixed-Film Activated Sludge in a …
Between the 59th and 184th day of operation, numerous microorganisms were detected on the fibers and in the activated sludge, testifying to low biological oxygen demand, good aerobic conditions for nitrification, and long sludge age. However, the process seemed to break down after day 72, when the occurrence of metazoan led to …Web
اقرأ أكثر
Evolution of the activated sludge process: the first 50 years
A rational foundation of the activated sludge process for the removal of organic carbon could then be established based on mass balance. This approach also defined essential parameters that could relate microbial reactions involved with plant design and operation. ... Scientific ideas and discoveries have also enabled conceptual …Web
اقرأ أكثر
Wastewater Treatment Plant: Modelling and Validation of an …
Therefore, the present paper focuses on the development of a reliable and accurate simulation model of the activated sludge process based on the most widespread configuration of the Ludzack‐ Ettinger layout in steady state conditions, including the denitrification, combined nitrification andWeb
اقرأ أكثر
Enhanced technology for sewage sludge advanced
The sludge production process is shown in Fig. 1. Domestic and industrial waste water needs to be treated through a primary sedimentation tank and a secondary sedimentation tank. After the procedure, the filtered residue is the excess activated sludge. ... With the development of cities and population, the production of sludge is increasing ...Web
اقرأ أكثر
Feasible process development and techno-economic
The process flow diagram (PFD) was developed for paper sludge to ethanol conversion process and was subsequently used to develop a model in Aspen Plus ® to obtain the necessary mass and energy balances for sizing the equipment that is required for SSF process. Process designs were developed for feed rates of 15, 30 and 50 t/d, …Web
اقرأ أكثر
The development in biological wastewater treatment over the last …
The development in activated sludge process also required more efficient activated sludge separation and thickening. The paper describes the development from secondary clarifiers to membrane separation. Increasing water stress around the globe …Web
اقرأ أكثر
Re-evaluating the Necessity of High-Rate Activated …
In this study, we argued that substantial improvement in the energy efficiency might be no longer achievable through further optimization of the activated sludge process. Instead, we should devote more effort …Web
اقرأ أكثر
Water | Free Full-Text | Continuous-Flow Aerobic Granular Sludge …
The activated sludge (AS) process is one of the most widely used biological aerobic methods for wastewater treatment. ... Sludge development was monitored weekly using microscopic images provided by a Leica DM2000 microscope. The microscope was coupled to a camera (Leica), allowing monochrome images to be collected at 400× …Web
اقرأ أكثر
Microwave pyrolysis of sludge: a review | Sustainable …
As an environmentally friendly energy recovery technology, microwave pyrolysis has huge development potential in sludge resource treatment. This paper comprehensively reviews the progress of microwave pyrolysis of sludge, focusing on the mechanisms and development status of microwave pyrolysis equipment. The effects of …Web
اقرأ أكثر
Evolution of the activated sludge process: the first 50 years
Abstract The paper presents a critical overview of the first 50 years in the evolution of the activated sludge process. Recognition of the role of aeration and …Web
اقرأ أكثر
Modeling and model performance evaluation of sewage sludge gasification
Syngas is a high-value product of the sludge gasification process, as it can be burnt in gas engines and turbines ... E., M. Nieminen, and P. Simell. 2004. Development and commercialisation of biomass and waste gasification technologies from reliable and robust cofiring plants towards synthesis gas production and advanced cycles. 2nd World ...Web
اقرأ أكثر
A review of the application of different treatment processes for oily
A large amount of oily sludge is produced during the process of oilfield exploration, refining, gathering, and transportation, and is characterized by high oil content, fine particles, large viscosity, and dehydration and transportation difficulty (Nikkhah et al. 2015; Hassanzadeh et al. 2018; Lashkarbolooki and Ayatollahi 2018).The composition of …Web
اقرأ أكثر
Feasible process development and techno-economic
Paper sludge at 20 g/L solids was disintegrated at 37,500 rpm in a laboratory mixer (British pulp evaluation apparatus, Mavis Engineering, London), based on the …Web
اقرأ أكثر
Status and prospect of oil recovery from oily sludge:A review
Oily sludge contains large amounts of oil emulsions, water, heavy metal ions, and other recyclable resources composed of hydrocarbons and refractory petroleum hydrocarbons, which are a renewable energy with high potential value (Hu et al., 2020).In addition, with the continuous updating of environmental friendliness, sustainability, and …Web
اقرأ أكثر
A Review of Sludge-to-Energy Recovery Methods
This process is common during combustion of wet sludge, particularly waste of Energies 2019, 12, 60 17 of 38 bulky particle sizes and is referred to as auto-gasification due to the high steam ...Web
اقرأ أكثر
A review of mechanistic and data-driven models of aerobic granular sludge
The development of simulation models plays an influential role in understanding the process dynamics and predicting the process behavior, which is critical during the transition from laboratory and pilot studies to the design of full-scale plants. ... Since the AGS process is much newer than the activated sludge process and has only …Web
اقرأ أكثر
Recent development in the treatment of oily sludge from …
1. Introduction. A considerable amount of oily sludge can be generated from the petroleum industry during its crude oil exploration, production, transportation, storage, and refining processes [1], [2].In particular, the sludge generated during the petroleum refining process has received increasing attention in recent years.Web
اقرأ أكثر
Sustainability | Free Full-Text | Sewage Sludge Biorefinery for
Sewage sludge processing and disposal have a significant weight on the energy and economic balances of wastewater treatment operations and contribute substantially to greenhouse gas emissions related to wastewater processing. Despite this, sewage sludge contains substantial recoverable resources in the form of energy and …Web
اقرأ أكثر
Recent Progress in Sludge Co-Pyrolysis Technology
With the development of society and industry, the treatment and disposal of sludge have become a challenge for environmental protection. Co-pyrolysis is considered a sustainable technology to optimize the pyrolysis process and improve the quality and performance of pyrolysis products. Researchers have investigated the sludge co …Web
اقرأ أكثر