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The performances of three anaerobic filters (AF) with different types of supporting media (soft and hard packing double-media (SHM), hard packing media (HM) , and soft packing media(SM)) were evaluated through their ability to remove organic compounds in winery wastewater and biogas energy recovery. When hydraulic retention time (HRT) is 10 days and volume organic loading rate (OLR) is 9.02kgCOD/m...
The release of ammonia from the industry of rare earth leads to harmful cyan bacterial bloom and consumption of non-renewable oil resources cause the energy crisis. Using an isolated strain of Chlorella sp. USTB-01, which can grow both autotrophically and heterotrophically, to remove ammonia nitrogen from the rare-earth wastewater and to produce biodiesel were investigated. The results showed that...
The intensive and fast development of livestock farming with ecological pattern of raising-biogas-irrigating is widely applied in China. After anaerobic fermentation the agricultural wastes can provides clean energy. However, there is problem by lacking of land to digest the biogas slurry. Based on livestock wastewater from a dairy farming, the experiment used modified two-stage anoxic/oxic (A/O)...
This article describes a large-scale biogas plant in a dairy farm located in the Tongzhou District of Beijing. It is has a treatment capacity of 30t manure and 30t wastewater per day, a total of 60t/d with a residence time of 20 days. Input material undergoes mesophilic fermentation inside the digester, which also directly stores the biogas above the slurry within the same tank. This storage method...
The bio-hydrogen producing process has complex interactions; thus, constructing a detailed mechanistic model and proper control architecture is difficult. Artificial neural networks (ANNs) are capable of inferring the complex relationships between input and output process variables without a detailed characterization of the mechanisms governing the process. This work presented a novel ANN that accurately...
Monosodium glutamate (MSG) wastewater is a very refractory case of high strength organic wastewater. To investigate the effect of operating variables on treatment of MSG wastewater, a laboratory scale study was conducted. The treatment of MSG wastewater was studied in a continuous flow anaerobic fluidized blanket (UASB) reactor. The effect of operating variables such as organic volumetric load rate...
The effect of hydraulic retention time (HRT) on the performance of hydrogen production from beet sugar wastewater by anaerobic fermentation using mixed microbial communities was investigated in a continuous stirred-tank reactor (CSTR) in this present study. A CSTR was designed and its performance was determined at various HRT. The goal was to find the optimal HRT for hydrogen production, to minimize...
The Purpose of this work was to explore upgrade of UASB(Up-flow Anaerobic Sludge Bed)technology, that has been proved inefficient in dealing with high strength organic content wastewater (COD concentration: 20,000-150,000 mg·l-1) from distillery plants that use cane molasses and cassava as feedstocks in GuangXi Region, China, where sugar and cassava starch are two pillar industries. The limits of...
The bio-diesel and 1,3-prpanediol (1,3-PD) processes are combined in our practices. The properties of flocculant from 1,3-propanediol fermentation was investigated. The characterization of the bioflocculant by GPC indicated the average molecular weight was about 2.0??105 Da. The neutral mono saccharides were the main component of the flocculant. Ca2+, Mg2+, Cu2+, K+ and Na+ were employed as flocculant...
Biohydrogen production with simultaneous wastewater treatment was studied in continuous stirred-tank reactor (CSTR) using beet sugar wastewater as substrate. Aerobic activated sludge was used as parent inoculum to startup the bioreactor. The reactor started up under the condition of influent COD concentration 4000 mg/L, pH 7, HRT 8 h and (35??1)??C, with a biomass of 6.09 g/L activated sludge in term...
As the massive agent in the paper mills, deinking agent was wasted to pollute environment. What's worse, wood extractives increased environmental pollution. Therefore, PyGC/MS was used to analyze the bioenergy resource of bamboo ethanol extractives. Relative content of each component was determined by area normalization. The ethanol extractives contain 117 compounds namely 2-furancarboxaldehyde, 5(hydroxymethyl)...
One of the main problems related to environmental protection in Costa Rica is the adequate management and treatment of piggery and dairy wastes. Pig and dairy farms with hundreds to several thousand of animals are in operation without adequate system for treatment and disposal. Manure, urine and rests of food are washed out from the cages with volumes of water not adequately controlled causing a great...
The wastewater from distillation process has high organic content, which has to be treated to bring down the levels of COD and BOD to prescribed standards of environmental authorities. In this study, the organic wastewater from distillery also known as spent wash is treated by closed anaerobic reactors to recover methane rich biogas and utilise the methane as fuel to generate steam and electricity...
Two types of waste activated sludge (WAS) and kitchen garbage were used to prepare the WAS samples with different volatile solid (VS) contents, and the digestion efficiencies of prepared samples were investigated by mesophilic two-phase anaerobic digestion (TPAD) process. The experimental results showed that the ratio of volatile fatted acids and bicarbonate alkalinity (VFA/BA) in acidogenic phase...
The production of noble Eucalyptus oil from Eucalyptus leaves brings a mass of extracting wastewater pollutive to water environment. In order to better utilize and recover the productive wastewater from the Eucalyptus oil, we used pyrolysis-GC/MS to analyze the possible top value-added components of benzene/ethanol extractives of leaves of two Eucalyptus cultivars, i.e. E.dunnii and E.grandis. Relative...
Beech tree has high adaptability to environment and tolerance to water stress, and a long history of utilization and plantation in many countries. Moreover, beech wood is world- widely used as high-grade timber of paper making for its dendrological characteristics of fast growing, high biomass, medium density, high impact ductility, compressively bend strength. However, researches on Beech wood were...
Municipal biological wastewater treatment plants (WWTPs) generate greenhouse gases (GHGs) in three main ways: (1) by consuming large amounts of energy from electrical and natural gas utilities to operate the plant, (2) by inherently generating CO2 that is lost to the atmosphere, and (3) by generating excess microorganisms that must be disposed of. Effective conversion of these microorganisms or "waste...
The aim of the present paper is to develop neuro- fuzzy models of the anaerobic organic digestion process in wastewater treatment from laboratory and simulated experiments accounting for the variable organic load, ambient influence and microorganisms state in MATLAB environment. The main contributions are determination of significant model parameters via graphical sensitivity analysis, simulation...
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