3. Fecal sludge collection, transportation and characteristics † Sanitization process † Lactic acid pretreatment † Yeast pretreatment † Lime treatment † Ammonia treatment † Composting 4. Technologies for fecal sludge management and application in Agriculture † Potentials of stabilization and composting † Future problems
Nov 15, 2023 · Municipal solid waste contains a high percentage of organic waste, and when it is not disposed of, it becomes a threat to the environment by contaminating the air, water, and soil. Composting is one of the recovery techniques in which the end product of waste eventually contributes to the agriculture industry, reducing the harmful effects on the environment. Composting municipal solid waste is
Jun 20, 2012 · Purpose Urbanization and industrialization in China has resulted in a dramatic increase in the volume of wastewater and sewage sludge produced from wastewater treatment plants. Problems associated with sewage sludge have attracted increasing attention from the public and urban planners. How to manage sludge in an economically and environmentally acceptable manner is one of the critical issues
An Urban Sludge Fermentation Tank is a modern waste treatment device designed to convert urban sludge into valuable resources. It operates by utilizing microorganisms to decompose and ferment sludge, breaking down organic matter into simpler compounds while generating organic fertilizers and renewable energy sources such as biogas.
Dec 1, 2022 · Urban environmental sanitation is seriously affected by the sludge that contains many pathogenic bacteria, parasites, Cu, Zn, Cr, Hg, Pb, Cd, Ni, and other heavy metals [3]. In recent years, as composting was in line with the concept of green development, it had become an effective disposal technology employed for solving problems caused by
May 31, 2023 · 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 based on life cycle assessment (LCA). LCA provides a flexible
Jan 10, 2020 · However, the current process of extracting useable energy from urban biomass has two problems that must be addressed in order to achieve greater energy efficiency: (1) significant fossil fuel consumption is currently needed to dry sewage sludge in wastewater treatment plants, and (2) a huge amount of exhaust heat from incineration plants
Mar 26, 2024 · Sewage sludge is the largest by-product of used water treatment. Its production is dependent upon influent characteristics and the processes applied. It is composed of a complex, heterogeneous mixture of microorganisms and readily biodegradable organic and inorganic materials. Sludge treatment is a highly complex, expensive, and environmentally
Feb 1, 2021 · The energy return on investment (EROI) is an indicator to evaluate the efficiency of WWTPs or sludge lines (Colosi et al., 2015). This indicator can be defined as the ratio between the energy or electricity produced in the sludge line and the energy consumed in the sludge line, according to Equation (3).
Apr 4, 2024 · Recently, one of the main purposes of wastewater treatment plants is to achieve a neutral or positive energy balance while meeting the discharge criteria. Aerobic granular sludge (AGS) technology is a promising technology that has low energy and footprint requirements as well as high treatment performance. The effect of co-treatment of municipal wastewater and food waste (FW) on the treatment
Apr 10, 2024 · While PY and HTC outperform the conventional sludge treatment routes in terms of the total environmental impact (1.79E-10, 1.72E-10) due to energy recovery and the use of clean energy sources. AF and PY demonstrate better economic performance (842.11 and 712.00 CNY) compared to the traditional route AC (905.06 CNY).
Jan 14, 2021 · 28 Citations. Metrics. In present study, the effects of carbon sources on compost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were
Dec 15, 2022 · Composting is one of the ways to return sewage sludge nutrients to the soil and thus keep them in the economic cycle. This well-known technique is still being developed in search of more advanced, optimal solutions. This study presents the results of an environmental and economic analysis of the sludge treatment processes used in a municipal wastewater treatment plant. The sludge (up to 4700
Jan 1, 2019 · This process has a huge potential for reuse of waste as an energy source and it can be valuable mainly for the cheap raw materials such as sewage sludge. The energy accumulated in the produced gas is highly dependent on agents such as either the feed fuel or reaction type, but also many others (Fytili and Zabaniotou, 2008). In comparison to the
3) Economic analysis of composting This chapter takes a wastewater treatment plant in Inner Mongolia as an example. The designed capacity of the composting plant for dewatered sludge is 150 t/day with a moisture content of 60%. This means that the plant can process 54,000 t of dewatered sludge per year.
