Effluents from many food processing industries, slaughterhouses, edible oil processing industries, and dairy product industries contain high lipid. These lipid-rich wastes content lipids as a main ingredient and causes problems during the anaerobic treatment of waste. One of the operational problems associated with lipid is clogging. Besides clogging, it also causes the mass transfer limitation forming a layer on the surface of granules by absorbtion. Due to adhesion of fat, biomass wash out is another problem in anaerobic reactors treating any lipid-based wastewater (Cirne et al., 2007). All these operational problems restrain the efficiency of anaerobic reactors. To overcome these operational problems, generally the lipid content in …show more content…
Liquefaction of lipid was indicated as the process-controlling factor due to their low bioavailability in the presence of high amounts of suspended solids (Petruy and Lettinga, 1998; Sayed, 1988).
LCFA exert an acute inhibitory effect on acetoclastic and hydrogenotrophic methanogens, acetogens, and to the β-oxidation itself (Kim et al., 2004; Lalman and Bagley 2000, 2001, 2002; Templer et al., 2006). Moreover, LCFA degrading bacteria have a very slow growth rate (Mackie et al., 1991). As a consequence, during anaerobic digestion of lipid-rich wastes, accumulation of LCFA is most likely phenomenon and subsequently, inhibition of the biomethanation occurs. Oleic acid is the major LCFA in various kinds of industrial and domestic lipid-rich wastewaters (Pereira et al., 2002). It was also reported as the most toxic LCFA (Cirne et al., 2007). Adsorption of LCFA to the cell wall (Koster and Cramer, 1987), and binding of LCFA to cell membranes, changing their surface property with interference in transport functions (Hook et al., 2010), have been suggested as potential mechanisms underlying inhibition by LCFA. Nevertheless, Pereira et al. (2004, 2005) observed mineralization of biomass-associated LCFA up to 5 g COD-LCFA g-1 volatile solids, and concluded that LCFA inhibition is reversible which is primarily caused by physical transport
Specifically, we investigated the following pathways: (1) Anaerobic digestion of food waste (2) Anaerobic digestion of BSFL fed on food waste along with residual food waste; (3) BSFL fed on food waste used to produce biodiesel and digestion of the residual lipid extracted BSFL combined with residual food waste. Data are also reported on the bio-methane of BSF cuticle and adult black soldier flies, and characterization data is provided on all
Factory farms cause a lot of waste in fact, a place called Delmarva Peninsula has 600 million chickens which together all create a whopping 400 tons of manure in a single year but that is nothing compared to the US’ crazy 61 million tons of animal waste alone in a year. That is 130 times the amount of human waste! According to the Environmental Protection Agency, hog, chicken and cow manure has polluted 35,000 miles of rivers in just twenty-two states! The amount of animals bred in Factory Farms will make these numbers rise dramatically too.
Agricultural pollution has historically not been regulated under the United State’s most powerful water quality control law, The Clean Water Act of 1972 (CWA). But as the U.S. agricultural industry has become more industrialized, additions have been added to the CWA that attempt to curb increasing pollution from industrial animal farm housing facilities, technically known as Concentrated Animals Feeding Operations (CAFOs). One of these additions — the “Waters of the United States,” (WOTUS) Rule — came in 2015, providing scientific evidence for the regulation of CAFOs and other highly toxic sources alike under the CWA. In the name of all farmers, President Donald Trump has taken the side of industrial agriculture since taking office, and proposed
Factory farming reduced the amount of land needed for meat production, however, these farms are a serious water pollutant. The waste of these animals ends up in the surrounding water and poses the constant threat of drinking water contamination. Runoff from factory farms and livestock grazing are one of the leading causes of pollution in rivers and lakes. The EPA notes that “bacteria and viruses can be carried by the runoff and that groundwater can be contaminated.” The huge quantities of animal waste runoff produced by these operations leech into the water supply and affect the natural aquatic life cycle. Livestock manure is rich in nitrogen, phosphorous, and other fertilizers. These chemicals eventually work their way into our stream, rivers
After the transesterification process was complete the LEA was separated from the biofuel, and water/methanol mixture using an Erlenmeyer filtering funnel utilizing both course and fine filters (Whatman 1541-125 and 1542-125). A 1:1 solvent to water ratio (300 mL) and a 3:1 solvent to chloroform ratio (100 mL) were added to induce a phase separation. Phase separation was allowed to occur overnight. Biofuel and chloroform were separated from the methanol/water mixture using a separation funnel. The chloroform and biofuel were separated by evaporating and recovering the chloroform by heating the mixture to 62°C and then running the chloroform gas through a condenser. Samples were taken of each product and byproduct excluding chloroform so that
Anaerobic jar contain anaerobic pack, which converts oxygen into water, creating anaerobic environment. This does not allow bacteria who are unable to carry cellular respiration in absence of oxygen to survive. The media that was placed in this anaerobic jar had no growth compare to the ones that were placed in the aerobic environment. The tube showed cloudiness only at the top, showing that it is a strict aerobe, color change to pink was detected. Although both of these test show that the microorganism is a strict aerobe, oxidase test shows that the microorganism doesn’t produce cytochrome c oxidase enzyme, which is part of electron transport chain in cellular respiration cycle.
On the basis of optimum temperature and the temperature span in which the microorganisms are able to grow and metabolize they are classified into ‘temperature classes’. These classes are: (a) Mesophiles, (b) Thermophiles and (c) Psychrophiles. Temperature is one of the most important factor that influences the anaerobic digestion (AD). Many researches have been performed to evaluate the pros and cons of mesophilic, thermophilic and psychrophilic modes of sludge anaerobic digestion. Generally, sewage sludge is more widely treated by mesophilic anaerobic digestion compared to thermophilic digestion. Anaerobic psychrophiles have merely been found in the natural ecosystems that’s why we have little information about psychrophilic anaerobic reactors
Not only is the agriculture business profoundly responsible for pollution of Earth’s oceans, but it also uses 80-90% of the global water supply (Andersen and Kuhn). As of 2016, there are nearly 783 million people who do not have access to clean water, and over six million deaths a year related to water disasters and diseases (UNESCO Water Corp). Despite this daunting fact, meat industries in America alone produced 25.8 billion pounds of beef in 2013 (North American Meat Institute). It takes about 2,500 gallons of water to produce one pound of beef. So, in 2013 alone, American meat industries consumed about 6.5 trillion gallons of water (Andersen and Kuhn).
To further study lipids, we experimented with the emulsification of lipids. An emulsifier has both polar and non polar ends, which change the polarity and causes fat to disperse in water. Two test tubes were used. The first was marked at three and four centimeters. The second labeled at one three and four centimeters. In tube one we added water to the three centimeters, and filled oil to the marking on the center tube and shook the tube. The results expected were confirmed and the two remained as they
The question lies does environmental contamination have a major effect on real estate properties? Well environmental contamination turns out can cost the owner of the property or a potential buyer. Environmental contamination on a property may have some implication on the on the property value. Not only could potentially hurt the owner or potential buyer financially it could also do physical damage to the property as well.
Food contamination issues are common in the industry, but they can be dangerous. We are a small company so minimizing these issues are important since we cannot handle losses as well as larger companies. An example of a contamination could happen like this:
Airborne contaminants can be mild in hazards to extremely dangerous, and are used quite often within the construction and general industries. Sometimes workers are even exposed to these airborne contaminants on a daily basis. The most common types of airborne contaminants are dusts, fumes, smoke, aerosols, mists, gases and vapors. All of these airborne contaminants are important to be aware of, you must know what their causes are and how to protect your workers from them. As each of these contaminants have a permissible exposure limit (PEL), and it is important to be aware of what each of them is, so you can make sure these levels are not reached or protective equipment is available and accurate for each exposure should your workers have to
The experimental results in this experiment were similar to, but not exactly the same as those outlined in literature. Primarily, examination of the demonstration material was relevant in helping understand the role that a mixed bacterial culture and surfactant play in the formation of emulsions and biomass. Preparing the control treatment (no inoculum, no surfactant) was important because it established a method of comparison of the remaining experimental treatments and assessing whether or not the results obtained were rational. The experimental flask that was prepared as part of this experiment contained no inoculum and had surfactant addition. As indicated by the observations, demonstration flasks that contained surfactant had
Only use leftovers from the night before once and keep lunches in the fridge until your child is leaving for school.
Anaerobic Digestion, also known as biodigestion, is a biological process that occurs when organic matter is decomposed by anaerobic microorganisms in the absence of oxygen. This means organic matter is placed in a warm airtight location and left for bacteria to digest. Anaerobic digestion occurs naturally in swamps and bogs but is not difficult to mimic at a landfill site. So long as the anaerobic plant is properly monitored, biodigestion can allow the emission of methane (CH4), which is 22 times more potent as a greenhouse gas than carbon dioxide (CO2) (ADBA), to be almost completely controlled in a safe and low odor environment. With the high heat levels of anaerobic digestion, pathogenic organisms, like bacteria and fungus, and harmful weed seeds are destroyed. The economic benefits of anaerobic digestion is very dependent on the type and quantity of feedstock used, the length of time spent in the digester, as well as the utilisation of the by-products.