Recently, increasing attention has been paid to heavy metals in sludge. However, limited literature could be found on the distribution characteristics of sludge and their potential risks. In this study, sludges from wastewater plants Jiangsu Province (China) were selected for investigation metal loadings, showing that typical levels order Zn > Cu Cr Ni Pb As Hg Cd, ranging 154 2970 mg/kg, 28...

Activated sludges are an inoculum source commonly used in biodegradation studies, as wastewater treatment facilities constitute an entry point to the environment for many chemicals. In this paper, the main issues relating to the use of activated sludge in biodegradability tests are presented. Special attention is also devoted to discussing the factors affecting both the activity of the microbia...

The present disposal routes of sewage sludge represent a critical environmental issue in Egypt. Recently, there has been an increasing concern about sewage sludge management due to the environmental risks, which resulted from the fast expansion of wastewater treatment plants without equal attention in dealing with the produced sludge. This paper discusses the current situation of sewage sludge ...

background: today, in many countries, wastewater treatment plants effluent is an important part of the renewable water resources. in this case, the effluent quality standards are developed and used is important. the aim of this study was to investigate the potential use of wastewater plants effluent restricted irrigation. methods: in this descriptive - analytical study, samples was collected fr...

Know days, pollution made by the wastewater in rivers and other water body’s is one of the main concerns of environmental engineers. Membrane bioreactors are one of the earliest methods for treating swage and also to produce water that is acceptable for reuse purposes. The term membrane bioreactor expresses a combination of activated sludge and membrane separation processes. The need to process...

Detergent wastewater has to be treated prevent water pollution, especially for the reclamation of large quantity laundry waste reuse. A detergent destruction method removes by using it breakdown activated sludge so as foaming when aerated in an SBR. Many research studies had reported methods and effects increasing reduction. close examination treat WHD agreed well with literature that disintegr...

The National Egyptian Agenda 2030 recently adopted the concepts of sustainable cities, mitigating and adapting to climate change. This study responded these by treating sewage reuse it in softscaping recycling sludge reduce energy consumption support heating systems producing biogas. Of limitations this study, focuses on a compound propose model increase sustainability cities. used many technol...

This paper presents three new approaches to reduce excess sludge production in activated sludge systems: 1) modification of conventional activated sludge process with insertion of a sludge holding tank in the sludge return line; 2) chlorination of excess sludge so as to minimize excess sludge production; and 3) utilization of a metabolic uncoupler, 3, 3', 4', 5-Tetrachlorosalicylanilide (TCS) t...