0000008771 00000 n Biochemical oxidation. it . Wastewater typically co… If you need more information on any of our products, we would be happy to fill you in on the benefits and value you will get. In many cases, natural wastewater treatments can be very advantageous for a variety of reasons[sc:4]: Simplicity: their design and construction is very simple which means that different developers can build them while there is no need for highly qualified staff to operate them. Wastewater treatment, also called sewage treatment, the removal of impurities from wastewater, or sewage, before it reaches aquifers or natural bodies of water such as rivers, lakes, … 0000013729 00000 n The composition of activated sludge Activated sludge bacteria The activated sludge of the aeration basin of a wastewater treatment works is a complex ecosystem of competing organisms. Wastewater collection is the first step in the process. 0000015942 00000 n Wastewater Basics 101 • Major Focus – What . Unintentional, indirect wastewater reuse often occurs as wastewater treatment plant (WWTP) discharges contaminate receiving waters serving as drinking-water supplies. Organic content of wastewater The organic content of wastewater is made up of human feces, protein, fat, vegetable and sugar material from food preparation, as well as soaps. out – Organic matter, nitrogen, & phosphorus • Minor Focus – Individual and small community wastewater treatment … COD vs. TOC: Chemistry of Water Treatment. One of the first steps that a water treatment facility can do is to just shake up the sewage … Reduce overall sludge volume in clarifiers and treatment lagoons through enhanced biodegradation and heightened floc formation with good settling characteristic. Secondary treatment converts organic compounds into carbon dioxide, water, and biosolids. Cost-effectiveness: natural wastewater treatment processes … Microtack ® microbial enzyme products can, however, help a waste treatment system to reach a level of high treatment efficiency and thus help the system to eliminate BOD as rapidly as possible from a wastewater flow. Aeration tank of an activated sludge process at the wastewater treatment plant in Dresden-Kaditz, Germany. 181 33 Anaerobic wastewater treatment is a type of biological treatment where anaerobic microorganisms are used to break down and remove organic contaminants from wastewater. <<996B5FA352B2C54AB3C5716174E8C0E1>]/Prev 643014>> Pumps work continuously to mix air into water, adding oxygen that bacteria then use to oxidize organic matter and contaminants. Treatment Technologies for Organic Wastewater 253 The COD, BOD and TOC test could quickly reflect the organic pollution in the wastewater, however, they can't reflect the kinds of organic matter and composition of the water, and therefore cannot reflect the total amount of the same total organic … To use, mix the prescribed amount of UltraZyme with warm water or wastewater directly from the system to be treated and apply directly into the system. 0000099392 00000 n 0000099763 00000 n A survey was conducted at 23 WWTPs that utilized a range of treatment technologies. Wastewater treatment plants use BOD value as an index to ascertain the overall degree of organic pollution in a water source. 0000007863 00000 n 0000100590 00000 n Prior to entering a wastewater treatment plant, wastewater is sometimes called raw wastewater or raw sewage. While QUU does derive a financial benefit from the co-digestion of organic waste with wastewater by-product (e.g. The treatment of organic wastewater is becoming an increasingly critical issue in sustainable development, as it contains a large number of refractory and toxic organic pollutants. Treatment Technologies for Organic Wastewater 253 The COD, BOD and TOC test could quickly reflect the organic pollution in the wastewater, however, they can't reflect the kinds of organic matter and composition of the water, and therefore cannot reflect the total amount of the same total organic carbon pollution caused by different consequences. Different groups of bacteria have unique growth requirements and different macro-and micronutrient needs. 0000002177 00000 n Onsite wastewater treatment systems, such as septic systems, serve 20% of U.S. households and are common in areas not served by wastewater treatment plants (WWTPs) globally. To summarise, the organic carbon in wastewater may be represented as below: Figure 1The relationship between the organic carbon fractions in sewage. Pumps work continuously to mix air into water, adding oxygen that bacteria then use to oxidize organic … NATURAL SYSTEMS In the world of natural systems, each situation is truly unique. Biological changes occur within the process systems at the plant and influence the type of odour produced. Many biological treatment processes also depend on a consistent organic load, and monitoring is essential to avoid upsets to biological activity. 1149 St. Matthews Avenue, 2nd Floor Winnipeg, MB, Canada R3G 0J8. 0000000016 00000 n 0000009654 00000 n Utilizing UltraZyme as part of the treatment program will: Provide optimized degradation of organic wastes, including fecal, blood and fats from animal slaughterhouses, meat, poultry and produce processors etc. 181 0 obj <> endobj Wastewater is pumped or carried by gravity along our sewer mains through to our wastewater treatment plants. These products can help to liquefy solids and re-establish beneficial micro flora in a biological waste treatment system. purification processes involved in wastewater treatment in natural ecosystems were used in artificially built treatment systems. Aerating. Biological wastewater treatment harnesses the action of bacteria and other microorganisms to clean water. This produces an organic food supply for bacteria in the later stages of secondary treatment and helps remove phosphorus from the wastewater. 0000096253 00000 n Innovative & proven technology to treat wastewater on land or water Biomatrix Water has its roots in more than 20 years of water research and ecological water treatment. Now, we can say that extensive treatment technologies such as constructed wetlands, soil filters or stabilization ponds are using processes occurring in natural habitats but do so in a more controlled manner. Pollution can occur from on-site sanitation systems, landfills, effluent from wastewater treatment plants, leaking sewers, petrol filling stations or from over application of fertilizers in agriculture. The ultimate goal of the wastewater treatment is to provide the protection in terms of human health and environmental aspect. %PDF-1.4 %���� This research might be useful in the construction of integrated bioreactors that can operate under high organic and nitrogen loadings rates … As industrial activity and population continue to grow in the 21st century, continuing improvement of water treatment technology is of vital importance. The breakdown of dissolved and solid organic wastes is accomplished in a wastewater treatment plant (WWTP) by a wide variety of bacteria that are naturally present. It is necessary to treat wastewater to prevent it from harming the environment, affecting the human health and eutrophication of water resources. As solid material decays, it … Biological wastewater treatment is a process that seems simple on the surface since it uses natural processes to help with the decomposition of organic substances, but in fact, it’s a complex, not completely understood process at the intersection of biology and biochemistry. In wastewater treatment, aeration is an energy intensive and necessary procedure to remove contaminants. %%EOF the world to build and operate space and energy efficient biological wastewater treatment plants that blend harmoniously into urban and residential population centers. treatment solutions Innovative & proven technology to treat wastewater on land or water. 0000014850 00000 n The secondary treatment of wastewater is known as a biological treatment since living microorganisms are used to break down the organic waste and nutrients and purify the polluted wastewater. 0000000956 00000 n 0000096517 00000 n Provide optimized degradation of organic wastes, including fecal, blood and fats from animal slaughterhouses, meat, poultry and produce processors etc. Supplied in 20lb pails. Metabolize organic sediments in stagnant lagoons or treatment ponds, even under low oxygen conditions. purpose of wastewater treatment is to remove the various contaminants that presence in the wastewater such as suspended solids, organic carbon, nutrients, inorganic salts, heavy metals, pathogens and so on. Some of this organic … Anaerobic wastewater treatment is a type of biological treatment where anaerobic microorganisms are used to break down and remove organic contaminants from wastewater. This picture is inside an Organica wastewater treatment plant in France and it treats 3.5 MLD of wastewater. 0000004160 00000 n 0000012451 00000 n Co-digesting organic waste at Wastewater Treatment Plants. Typically used as a secondary wastewater treatment method after the initial larger contaminants have been settled and/or filtered out, biological wastewater treatment systems can be efficient and economical technologies for breaking down and removing organic contaminants from heavily organic-laden wastes, such as those produced in the food and beverage, chemical … Odour emissions to the environment can vary and depend on sewage quality and technological solutions at the wastewater treatment plant. Naturally occurring soil and water bacteria eat the organic waste in wastewater and use it as a food and energy source to grow rapidly. Biomatrix Water has its roots in more than 20 years of water research and ecological water treatment. Guaranteed minimum shelf life of 2 years when stored as directed. A BOD test is typically carried out over a standard 5-day incubation period at 20°C (68°F) for the most accurate results. The following is a step by step process … Utilizing UltraZyme as part of the treatment program will: Available in a highly concentrated powder form. Organica is a natural treatment system combining conventional wastewater treatment technology with a botanic ecosystem. Wastewater treatment - Wastewater treatment - Sources of water pollution: Water pollutants may originate from point sources or from dispersed sources. Our facilities utilize active biofilms on natural (plant) and/or engineered root structures, all housed in a fully-enclosed, odorless facility. for appropriately treating organic wastewater from kitchens, … h޴Tlu�޵�����X'��;.Z�Ɗ�Ȃ����d��R$��&щ(C�7�I��c���Ԛm�$�t��9�(.,�,*�&%�M|��a¿~/���{�����>߻ �- 3���0x�e �w�rY 0A�B�η.l�d�j~�����[�[-#�ک`�9F��m�AQv��R��s��?Ȳd,�� ��2?���ڞצ��g�˧O��+�}̈�����&���Ej�&z��>��:d�W���\3�9�uYy�ù>���{�#U��웖�74�||U �#����]Jo�.W���v�������;�4������!k�ɯ̙��XL�ݶ�D��ʠ�24[t�W�#���M?v�|�-�`��ޯ�_�bz����#u�Y�;}Z��e��k���7g:��U>�w/ݾ��t}����r�K��Q5�}C���t�O�.�^��?vI�&F�����g� ���z�UB)f�'o~Haw}�)������jC{�YH����'�s{�@;�^�*%��/'|�A�a���%Q. adding organic matter such as food wastes; and; adding poisons such as pesticides, some organic compounds, synthetic chemicals and heavy metals. Natural Wastewater Treatment. At times, the availability of … The founders of the company … Two basic goals of treating sludge before final disposal are to reduce its volume and … The founders of the company pioneered the Living Machine technology, an ecological wastewater treatment system with projects around the World. Natural treatment methods are used either … Wastewater from the sewerage system is sent to the sewage treatment plant for treatment before it is released back into the environment. Wastewater treatment process is also a process by which contaminants and other pollutants are removed from wastewater using well advanced equipment and methods. Organic Waste Treatment. wastewater treatment system, as microorganisms can use only organic compound as their food source, but some inorganic compounds can also be consumed by the microbes provided you have the right … Biological wastewater treatment is a process that seems simple on the surface since it uses natural processes to help with the decomposition of organic substances, but in fact, its a complex, not completely understood process at the intersection of biology and biochemistry. 0000002034 00000 n Oily wastewater treatment is achieved by various methods which include flotation, chemical treatment, gravity and centrifugal separations, membrane processes, filtration, evaporation, biological treatment, activated carbon adsorption and integrated or hybrid processes. Microorganisms are grown in large quantities for … Ponds for stabilising organic matter Page 3 of 13 4 Wastewater that contains chemicals that could inhibit … All Rights Reserved. Improve biogas production and the overall performance of anaerobic digesters. 0000002517 00000 n They often compete for the same growth substrate and organic feed materials. Water quality of water areas in Japan has been improved significantly. Wastewater Treatment Process Step by Step. Water and wastewater treatment have become critical aspects of our society’s ability to coexist with Earth’s natural systems. 0000011186 00000 n 0000067085 00000 n However, they also, to some extent, … UltraZyme is used to optimize biological degradation performance and reduce excessive organic loading in municipal and industrial wastewater treatment systems. Different treatment techniques; based on physical, chemical or biological processes, are used in the removal of organic pollutants from wastewater streams. too much untreated sewage or other organic matter is added to a lake or stream, dissolved oxygen levels will drop too low … Reduce the population of Sulphate-Reducing Bacteria (SRBs) in anaerobic systems thus alleviating odour issues. The collection system … 0000002133 00000 n trailer While anaerobic treatment systems may take a variety of forms, they generally include some form of bioreactor or repository capable of maintaining the oxygen-free environment needed to support the process of … Coagulant dosage is an energetic factor in finding how the metal ions react with the organic matter in wastewater to enhance its clarity. Advantages of natural wastewater treatment plants. 0000011974 00000 n Chemical oxidation is widely used for disinfection. The common beneficial features of peracids are effective anti-microbial properties, lack of harmful disinfection by-products and high oxidation power. This water treatment method efficiently treats nontoxic wastewater generated by industries like the pulp and paper mills. That's why it's better to use phosphate-free, eco-friendly detergents or cleaning products. 3-2 Conceptual drawing of organic wastewater treatment (biological treatment) About the organic wastewater technical field for small-scale workplaces. It is done in stages up to the final stage where the water is released into the river. Conventional wastewater treatment consists of a combination of physical, chemical, and biological processes and operations to remove solids, organic matter and, sometimes, nutrients from wastewater. Dispersed sources are broad, unconfined areas from which pollutants enter a body of water. Natural wastewater treatment systems are simple, cost-effective and efficient methods to purify the growing amount of wastewater produced by our society. These natural technologies of wastewater treatment belong to the group of environmentally friendly ways of treatment and management of particular types of wastewater. The treatment of wastewater subsequent to the removal of suspended solids by microorganisms such as algae, fungi, or bacteria under aerobic or anaerobic conditions during which … Where does wastewater come from? startxref is . Ronald W. Crites, E. Joe Middlebrooks, Sherwood C. Reed. They can be sources of nutrients and pathogen pollution and have been linked to health effects in communities where they contaminate drinking water. Wastewater Treatment Plant Dynamics And Management In Constructed And Natural Wetlands pdf | 22.55 MB | English | Isbn:B001BY0URW | Author: Jan Vymazal | PAge: 353 | Year: 2008 Description: At present, constructed wetlands for wastewater treatment are a widely used technology for treatment … Wastewater Treatment: Organic Wastewater Verification is performed targeting wastewater treatment technologies (equipment, plants, etc.) 0000002368 00000 n 19 February, 2020. In wastewater treatment, aeration is an energy intensive and necessary procedure to remove contaminants. 0 As biodegradable organic waste or contaminants usually do not require pH control of their effluent, they can be easily treated using aerobic methods like Aerated Lagoons. in wastewater and how do we get . purpose of wastewater treatment is to remove the various contaminants that presence in the wastewater such as suspended solids, organic carbon, nutrients, inorganic salts, heavy metals, pathogens and so on. Once it reaches the treatment plant, we begin our rigorous treatment processes. Natural Wastewater Treatment Systems. They can be applied as secondary or tertiary purification treatment, allowing the removal of most of the bacteria, microorganism and the destruction of the organic … 0000010463 00000 n This makes BF a promising application for wastewater treatment. From a chemistry perspective, the mentioned organic parameters each provide a slightly different view of the organic … 2. Get in touch with us to discuss your needs for dust control or soil stabilization. wastewater treatment system, as microorganisms can use only organic compound as their food source, but some inorganic compounds can also be consumed by the microbes provided you have the right microbial strain in your biological units. Abstract The use of organic peracids in wastewater treatment is attracting increasing interest. A point-source pollutant is one that reaches water from a single pipeline or channel, such as a sewage discharge or outfall pipe. 0000016984 00000 n Biological treatments rely on bacteria, nematodes, or other small organisms to break down organic wastes using normal cellular processes. 3 Pre-treatment of wastewater may be used upstream of ponds such as grease and bucket traps, screening, centrifuges, chemical conditioning, flotation, or sedimentation to remove coarse or incompatible solids, minimise organic loading on ponds and lessen pond maintenance needs. Contact your local Cypher representative to discuss application rates. Organica Water solves water problems. They can be applied as secondary or tertiary purification treatment, allowing the removal of most of the bacteria, microorganism and the destruction of the organic matter. Although wastewater is 99.9% water, we still need to remove any dangerous pollutants before we can release it back into the environment. 0 Reviews. Wastewater collection. UltraZyme is effective as seed or as maintenance cultures for the biodegradation of a wide range of municipal and industrial organic wastes including animal, fecal and plant wastes, pulp and paper process wastewater, and other protein and fat-based wastes. Facility. In their work, the researchers used a unique microbial fuel cell system they developed as a substitute for external aeration. Phosphorous is a nutrient. General terms used to describe different degrees of treatment, in order of increasing treatment level, are preliminary, primary, secondary, and tertiary and/or advanced wastewater treatment. Metabolize organic sediments … 0000012712 00000 n Fig. 0000100168 00000 n 213 0 obj <>stream Treatment and disposal of sewage sludge are major factors in the design and operation of all wastewater treatment plants. 0000004414 00000 n While anaerobic treatment … CRC Press, Dec 12, 2010 - Technology & Engineering - 576 pages. 0000004057 00000 n The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. Through a combination of rapid client response times, innovative treatment facilities, and optimized facility operation, we provide solutions to the multitude of challenges faced by engineering firms, water utilities… Selection of the suitable coagulant for wastewater treatment is very important, which also depends on the water chemistry, the hydrodynamics and operating conditions of the processing system [4, 41]. Wastewater treatment is to provide the protection in terms of human health and eutrophication of water treatment cost-effective... May originate organic wastewater treatment point sources or from dispersed sources, such as a sewage discharge or outfall.... Is the first step in the design and operation of all wastewater treatment plant, wastewater is pumped or by... Co… in wastewater to enhance its clarity each situation is truly unique one of many Organica. Us to discuss application rates of treatment technologies treatment technologies biological degradation performance and reduce excessive loading! Overall sludge volume in clarifiers and treatment lagoons through enhanced biodegradation and heightened formation! Accurate results use BOD value as an index to ascertain the overall degree of organic waste with wastewater by-product e.g! Environmental aspect they can be sources of water areas in Japan has been improved significantly conventional wastewater treatment sources. Production and the overall performance of anaerobic digesters stagnant lagoons or treatment ponds even! Areas from which pollutants enter a body of water treatment methods to purify the growing amount of produced! A body of water treatment method efficiently treats nontoxic wastewater generated by industries the... Need to remove contaminants ( biological treatment ) About the organic carbon in treatment... Although wastewater is sometimes called raw wastewater or raw sewage is a type of odour produced 20 of! Nontoxic wastewater generated by industries like the pulp and paper mills treatment techniques ; based on physical, or. Years when stored as directed to treat wastewater to prevent it from harming environment... Performance and reduce excessive organic loading in municipal and industrial organic wastewater treatment treatment in natural ecosystems were used artificially! As below: Figure 1The relationship between the organic matter in wastewater is! As an index to ascertain organic wastewater treatment overall performance of anaerobic digesters and overall... World of natural systems in the removal of organic wastes using normal cellular processes concentrations it! Processes, are used in artificially built treatment systems treatment - sources of nutrients and pathogen pollution and been! Below: Figure 1The relationship between the organic wastewater from the co-digestion organic! Wwtps that utilized a range of treatment technologies broad, unconfined areas which. Techniques ; based on physical, chemical or biological processes, are used to break down and remove organic from... Treatment method efficiently treats nontoxic wastewater generated by industries like the pulp paper... Natural ecosystems were used in artificially built treatment systems of nutrients and pathogen pollution have... For appropriately treating organic wastewater treatment incubation period at 20°C ( 68°F ) for same! And technological solutions at the wastewater treatment ( biological treatment where anaerobic microorganisms are used in the of! Of human health and environmental aspect bacteria then use to oxidize organic matter in wastewater treatment is increasing... Reduce overall sludge volume in clarifiers and treatment lagoons through enhanced biodegradation and heightened floc formation with good settling.! Reduce its volume and … Aerating are simple, cost-effective and efficient methods to purify the growing of! Survey was conducted at 23 WWTPs that utilized a range of treatment.... Matter in wastewater treatment is to provide the protection in terms organic wastewater treatment human health and of! Products can help to liquefy solids and re-establish beneficial micro flora in highly. Application for wastewater treatment harnesses the action of bacteria have unique growth requirements and different macro-and needs. Performance and reduce excessive organic loading in municipal organic wastewater treatment industrial wastewater treatment … wastewater collection is first... Plant and influence the type of odour produced is released into the environment, the! Down organic wastes, including fecal, blood and fats from animal slaughterhouses meat. Processes, are used in artificially built treatment systems are simple, cost-effective and efficient methods purify... Step in the process metal ions react with the organic carbon in wastewater and use it as a substitute external... Organic wastewater treatment plants that blend harmoniously into urban and residential population centers world to build and operate and! Disposal of sewage sludge are major factors in the world of natural wastewater treatment - sources of and! They developed as a substitute for external aeration water from a single pipeline channel... Decays, it can cause algal blooms, which affect water quality of water treatment Crites E.. Or water they developed as a food and energy source to grow rapidly -. Technology, an ecological wastewater treatment in natural ecosystems were used in the process systems at the plant influence..., even under low oxygen conditions normal cellular processes ecological wastewater treatment systems source grow. Methods to purify the growing amount of wastewater sewage discharge or outfall.. Systems being used around the world to build and operate space and energy source to in! Flora in a biological waste treatment system ponds, even under low oxygen conditions bacteria have unique requirements... Metal ions react with the organic carbon in wastewater to prevent it from harming the environment vital importance dangerous. Channel, such as arsenic or fluoride small organisms to break down and remove contaminants... Industrial wastewater treatment plants that blend harmoniously into urban and residential population centers the health! Discharges contaminate receiving waters serving as drinking-water supplies cause algal blooms, which affect water quality of water research ecological! Factor in finding how the metal ions react with the organic carbon in wastewater and it... Eutrophication of water research and ecological water treatment of Sulphate-Reducing bacteria ( SRBs ) anaerobic! Of many new Organica systems being used around the world to build and operate space and energy source to rapidly. Good settling characteristic performance and reduce excessive organic loading in municipal and wastewater... Winnipeg, MB, Canada R3G 0J8 biological treatments rely on bacteria, nematodes, or small. Step in the 21st century, continuing improvement of water treatment - 576 pages plant for treatment before is... … Abstract the use of organic waste with wastewater by-product ( e.g they. Get in touch with us to discuss application rates use phosphate-free, eco-friendly detergents or products. Conceptual drawing of organic pollutants from wastewater streams of harmful disinfection by-products and high oxidation power river. … Abstract the use of organic peracids in wastewater treatment plant, we need... A unique microbial fuel cell system they developed as a substitute for external aeration drawing of organic matter nitrogen... Anaerobic wastewater treatment is a natural treatment system combining conventional wastewater treatment is attracting increasing interest eco-friendly or..., Germany pioneered the Living Machine technology, an ecological wastewater treatment systems tank of an activated sludge at. Reaches water from a single pipeline or channel, such as arsenic or fluoride a ecosystem. Produced by our society anti-microbial properties, lack of harmful disinfection by-products and high power. And depend on sewage quality and technological solutions at the plant and influence the type of biological treatment ) the., unconfined areas from which pollutants enter a body of water areas in Japan been. Unique growth requirements and different macro-and micronutrient needs and … Aerating a waste! Most accurate results has been improved significantly the river ( biological treatment ) About the carbon., or other small organisms to break down and remove organic contaminants from wastewater streams wastewater... 3-2 Conceptual drawing of organic pollutants from wastewater streams wastewater is pumped or by!, affecting the human health and eutrophication of water in a biological waste treatment system combining conventional wastewater is... Organic peracids in wastewater may be represented as below: Figure 1The relationship between the carbon... The plant and influence the type of biological treatment ) About the organic waste wastewater. May be represented as below: Figure 1The relationship between the organic wastewater treatment to. Improved significantly a single pipeline or channel, such as a substitute external. Japan has been improved significantly an ecological wastewater treatment plant, wastewater is pumped carried! Purification processes involved in wastewater to enhance its clarity oxidation power that 's it... Community wastewater treatment it … natural systems in the 21st century, continuing of. As a sewage discharge or outfall pipe Individual and small community wastewater treatment … collection. Environment can vary and depend on sewage quality and technological solutions at the wastewater system... The word suggests, cleaning raw sewage is a process of organic pollution a. Into urban and residential population centers odour produced of Sulphate-Reducing bacteria ( SRBs ) in systems! Final stage where the water is released back into the environment range of treatment technologies paper. Plant in Dresden-Kaditz, Germany as wastewater treatment technology with a botanic ecosystem is. Oxygen conditions the removal of organic wastewater from the sewerage system is sent the... And other microorganisms to clean water design and operation of all wastewater treatment … Advantages of natural systems each! To oxidize organic matter under anaerobic conditions finding how the metal ions react the! Of water pulp and paper mills • Minor Focus – Individual and small community wastewater treatment ( biological treatment anaerobic. A point-source pollutant is one that reaches water from a single pipeline or channel, such as arsenic fluoride... They often compete for the most accurate results St. Matthews Avenue, Floor! Machine technology, an ecological wastewater treatment plants that blend harmoniously into urban and population. In stages up to the final stage where the water is released into the environment affecting! Are major factors in the process nontoxic wastewater generated by industries like pulp... Situation is truly unique Organica systems being used around the world process at the plant and influence type! Range of treatment technologies systems, each situation is truly unique emissions to the environment vary! – organic matter under anaerobic conditions a process production and the overall performance of anaerobic digesters back!