rate of QF = 80m3 d-1 to the SNdN activated sludge system. The SNdN system actually functions as an autonomous treatment plant where oxidation of organic pollutants, nitrification/denitrification and suspended solids sedimentation are taking place. Furthermore a sludge recycling from the secondary clarifier to the aeration tank is performed so as to ensure the required microbiological load (5000 ± 450 mg L-1). The aeration tank of the SNdN activated sludge system operates under low D.O. concentration
Activated sludge (AS) has become one of the most widely used biological wastewater treatment processes. The AS involves the transformation through metabolic processes of dissolved and suspended wastewater substrate, consisting of organic, nitrogen and phosphorus compounds, to settlable biological flocs and gases. (Sanin et al., 2006; Semblante et al., 2014). These flocs containing biomass and inorganic matter are settled in secondary sedimentation chambers to produce effluent that has low suspended
technologies for H2 production, but it is cost-intensive due to high-energy consumption (Ming et al., 2008). In contrast, dark fermentation process is low cost technology for hydrogen production from waste materials (Tawfik et al., 2012, Tawfik et al., 2013 and Tawfik and El-Qelish, 2012). Moreover, bio-hydrogen production from OFMSW has gained great attention due to energy generation while reducing the unwanted wastes (Tawfik et al., 2011). The main problems for bio-hydrogen production from bio-wastes
evaluation of the entire treatment process along with biological treatment process particularly suspended growth process Activated Sludge Process (ASP), attached growth process Trickling Filter (TF) and a combination of the both suspended and attached growth process Hybrid Reactor (HR) is presented in the following sections of this chapter. 2.2 REVIEWED OF LITERATURE ON ACTIVATED SLUDGE PROCESS In suspended growth processes, the microorganisms responsible for the treatment of wastewater are maintained in liquid
evaluation of the entire treatment process along with biological treatment process particularly suspended growth process Activated Sludge Process (ASP), attached growth process Trickling Filter (TF) and a combination of the both suspended and attached growth process Hybrid Reactor (HR) is presented in the following sections of this chapter. 2.2 REVIEWED OF LITERATURE ON ACTIVATED SLUDGE PROCESS In suspended growth processes, the microorganisms responsible for the treatment of wastewater are maintained in liquid
The usefulness of sludge sewage also known as bio solids in the environment can’t be overemphasized. According to Renner, millions of tons of sewage sludge is produced each year[1]. Land filling, incineration and land application are the possible options for the disposal of the bio solids resulting from the waste water treatment. Approximately six million tons of treated sludge produced annually in the U.S is applied to the farmland[6]. This method of disposal is favored above the other methods
In the article, “The Sludge at the Bottom of the Sea,” author Damiano Marchetti explains where human waste is going once it leaves the sewers of New York City’s streets. The authors main claim is human waste being dumped into the Atlantic Ocean and how it has affected activity down on the sea floor. Marchetti continues on about how the EPC told environmentalists not to worry about the sludge, because it wouldn’t affect the ocean since it cannot reach the bottom. And lastly the author finishes up
Three main experimental activities have been conducted during this research. Operation of the High Rate Activated Sludge (HRAS) Process, analysis of relevant parameters and Biochemical Methane Potential tests for different Solids Retention Times (SRT’s). The research methodology implemented in these activities is described and summarized in this chapter. 4.1 Influent Wastewater In this investigation, the influent is domestic wastewater collected and treated at the Luggage Point (LP) Wastewater
UTILIZATION OF HYPO SLUDGE WASTE FROM PAPER INDUSTRY IN THE PRODUCTION OF CONCRETE A Project Study Presented to the Department of Civil Engineering and Environmental & Sanitary Engineering College of Engineering, Architecture, Fine Arts & Computing Sciences Batangas State University Batangas City In Partial Fulfilment of the Requirements for the Degree of Bachelor of Science in Civil Engineering By: Belegal, Adrian M. Kano, Marikar A. Lising, Jerick A. October 2012 Table of Contents
UNIVERSITY OF SOUTHAMPTON FACULTY OF ENGINEERING AND THE ENVIRONMENT Energy neutral wastewater treatment: myth or reality? by Lu Liang 26826453 A dissertation submitted in partial fulfillment of the degree of MSc in Civil Engineering Supervised by: Dr. Yongqiang Liu September 2015? SUMMARY Sewage treatment plants have been notorious for intensive energy consumption and large amount of chemical addition for decades. With the more stringent water discharge standards implemented for environment