WO2013069026A1

WO2013069026A1 - Self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar industry effluent and distillery spent wash

Info

Publication number: WO2013069026A1
Application number: PCT/IN2012/000209
Authority: WO
Inventors: Kumar Narayan VIJAY; Neelakantan KRISHNAN; Kuber PRADEEP; Mathurvaishya SUBASH
Original assignee: Transcarb Energy Private Limited
Priority date: 2011-11-08
Filing date: 2012-03-29
Publication date: 2013-05-16

Abstract

A self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent, press mud, and distillery spent wash, said system comprises: first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate; second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and liquid filtrate from Micro Strainer for obtaining biogas and dilute organic liquid effluent digestate; Biogas Cleanup Module for converting hazardous hydrogen sulphide in the biogas into elemental sulphur, and moisture-free Dry biogas; Biogas Engine Generator Module for producing electrical power, hot exhaust gas and hot water; Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing Steam, and cooled exhaust gas for expulsion into atmosphere; Solid Fuel Module for producing solid fuel for a co-generation plant, liquid filtrate from Micro strainer for said second Biomethanation and Anaerobic Digestion Module; Hot condensate water from Solid Fuel Dryer returned in close loop to said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing steam; and Reverse Osmosis Waste Water Treatment Module for obtaining filtered effluent for reverse osmosis unit which outputs a first predefined portion of reverse osmosis, usable water and a second remainder predefined portion of reverse osmosis reject effluent as feed to first Biomethanation and Anaerobic Digestion Module.

Description

SELF-SUSTAINABLE ZERO INFLUENT AND ZERO DISCHARGE WASTE TO ENERGY SYSTEM AND METHOD FOR EATING SUGAR INDUSTRY EFFLUENT AND DISTILLERY SPENT WASH

ield of the Invention:

is invention relates to the field of systems for recycling and systems for energy oduction. irticularly, this invention relates to the field of systems for recycling and systems r energy production, especially pertaining to the Sugar Industry Complex insisting of Sugar Factory, Cogeneration Power Plant and Distillery.

[ore particularly, this invention relates to a self- sustainable zero influent and zero scharge waste to energy system and method for treating sugar factory effluent id distillery spent wash. ackground of the Invention:

re than 145 million tonnes of sugar (sucrose) is produced per year in about 120 )untries. Annual consumption is expanding each year by about 2 million tonnes, round 60-70 percent is produced from sugar cane with the remainder from sugar ;et. le cultivation and processing of sugar produce environmental impacts through e loss of natural habitats, intensive use of water, heavy use of agro-chemicals, scharge and runoff of polluted effluent and air pollution. This leads to the ;gradation of wildlife, soil, air and water where sugar is produced and of )wnstream ecosystems. lthough many of the environmental impacts of cane and beet cultivation are jneric to agriculture, some impacts are distinct, particularly in their severity. Qpacts relating to irrigation of sugar cane and pollution runoff are of particular mcern.

[ost Sugar Industries Complex have associated distillery and cogeneration power ant. The Sugar factory operates during crushing season which lasts for proximately 150 days in a year. The sugar factory generates five organic waste reams, mainly:

I Bagasse:

his is the fibre residue left after cane crushing, to extract their juice, and is ilised as a feed for cogeneration power plant. This is available during the ushing season. agasse production is about 28% to 30% by weight of original cane. Bagasse is 5ry commonly used as fuel in boilers in sugar mills for production of steam as ell as electrical power i.e. cogeneration. The steam is used in the processing of igarcane to sugar. It is also used in prime movers and in steam turbines for oduction of electrical power for running electrical motors and other power quirements of the sugar mills. i Press Mud:

tiis is fibrous waste produced in the sugar factory and as such is utilised in the )iler or as compost material along with spent wash. This is available during the ushing season. ress mud is obtained in sugar factories to a tune of 3 to 5% of the weight of jgarcane crushed. Press mud contains sizable quantity of macro and micro utrients, besides 20-25% of organic carbon.

) Sugar Plant Effluent:

his liquid effluent is produced in the sugar plant during the crushing season of 50 days. Factory effluents contain mainly organic waste, small amounts of salts nd used water.

) Molasses:

his viscous liquid organic waste is produced in the sugar factory during the 150 ays crushing season. Molasses is utilised as raw material to produce alcohol in a istillery. Molasses is a dark brown viscous liquid obtained by centrifuging the lassecuite (a suspension of sugar crystals in syrup produced in a sugar factory) as y-product of sugar while processing sugarcane sugar. It contains nearly 45% ncrystallized, fermentable sugar and some sucrose. he final molasses accounts for around 3 to 5% on quantity of sugarcane crushed. ) Spent Wash:

pent wash is a toxic effluent produced by the distillery during the process of lcohol production. Spent wash produced would range between 8 to 12 litres for very litre of alcohol produced. according to the existing state of the art, the cogeneration power plant (in ccordance with the sugar Factory) operates between about 180 to 200 days per ear, mainly due to unavailability of raw material during cane crushing off-season.

Tie distillery operates between 180 to 200 days per year, due to zero discharge iws of Central Pollution Control Board. resently, the spent wash is hazardous and the biggest environmental problem iced by the Sugar and Distillery Factory.

)n the other hand, energy requirement is an ever-increasing and ongoing process. Lapid urbanization and concurrent industrialization has led to tremendous ependence upon energy. Renewable energy or energy from renewable sources is a }pic of great research and development. Recycling is the art of using the waste nd processing it so as to clear / clean the environment and to extract more from e waste, efficiently, in order to provide a sustainable environmental solution. An ff shoot of this recycling of waste can be energy production.

Jso, waste recycling has many significant advantages. It leads to less utilization f raw materials. It reduces environmental impacts arising from waste treatment nd disposal. It makes the surroundings cleaner and healthier. It saves on landfill pace. It reduces the amount of energy required to manufacture new products. It lso reduces the carbon footprint.

'here is no cohesive, collaborative, self-sustainable system which incorporates the arious waste products generated by the sugar Factory in order for conversion to tilities of importance for the sugar Factory itself as well as for the civilization, in ;eneral. Individual modules and tools may be known for treating various waste omponents independently. However, there is no one-stop-shop or a single-unit acility which cumulatively provides a solution for or which incorporates a mutual iterdependence system for alleviating the hazards of the waste components by rocessing and treating them for efficient utility based purposes.

^"he system described herein provides a distributed grid of outputs and their usage D develop a sustainable eco-system with multi-input, multi-process, and multi- utput nodes.

'rior Art:

P 1038193 discloses a method for removing excess ionic components in the waste quid from sugar Factory. The steps of adsorption, separation, and electrodialysis re used in this patent document.

'N101455326 discloses a method for using molasses (of sugar industry) to extract il-

:N 1450005 discloses a method for treating alcoholic molasses word of cane sugar lill, solid discarded material of cane sugar mill. It discloses utilizing the action of iological bacteria to change the above-mentioned discarded material into the iological bacteria fertilizer.

!N101712805 discloses a method for preparing degradable agricultural mulches y reusing organic waste residues of biomass from the sugar industry. "N2199979 discloses a waste water treating device for a sugar refinery. It provides method for discharging waste water from the sugar refinery.

"N 1324770 discloses a method for treating waste water of cane sugar refinery uch that it makes the waste water meet discharge standards, does not pollute nvironment, and the obtained solid material can be used as chemical fertilizer

"N1289531 discloses a process for treating and reclaiming waste liquid of lolasses alcohol. It includes the steps of mixing the sugarcane pitch with said aste liquid in ratio inoculating edible metatrophic fungus, and culturing to obtain acterial feed and edible fungus.

P2004298677 discloses an anaerobic treatment method for sugar-based waste ^ater. It is applicable for sugar-based liquid like the waste water discharged in a eer producing process.

'Nl 01266102 discloses a method of waste water zero draining for a cane sugar iCtory. The system of this patent makes use of self-water of the cane to implement closed-circulating production, so as to save a plurality of process water and salize the waste water zero draining to make economic and social benefits. nsi201283266 discloses a three-waste disposal device of sugar-refinery boiler igh smoke processing efficiency and obvious economic benefits, which saves nergy and water, and dedusting wastewater and solid ash.

!Nl 978657 discloses a method to produce alcohol using discarded sugar materials ^•om sugar refinery's mud. N101653257 discloses a method for preparing edible bacterial gel using mainly aste molasses from sugarcane sugar refinery as raw material.

P570141 17 discloses a method wherein waste liquid resulting from the ermentation of the waste molasses in an energy saving manner. The waste liquid 5 burned after it is concentrated by a multistage concentration step in the industry if fermentation in which the waste molasses as a by-product is used as a raw naterial for the production of sucroses from sugar cane.

JB2100749 discloses a method for treating molasses.

"N 1978657 discloses a method for producing alcohol raw material utilizing sugar lant mud waste sugar. This patent provides a method to produce alcohol using iscarded sugar materials from sugar refinery's mud.

LU2301266 discloses a method for purifying molasses from the sugar industry.

R2813301 discloses a method for treating effluents containing alcohol and sugar 3 produce water, dry matter and alcohol. This method includes the steps of vaporative concentration and distillation.

ΪΡ075601 1 discloses a process for treatment of molasses obtained as by-products i the sugar manufacture.

LS2041220 discloses an application for eliminating waste effluents from the sugar dustry and the production of olive oil. iS2009267 discloses an effluent water treatment system and method. It details the Tocess, for purification of effluents from wineries, paper-making plants, istilleries for producing alcohol form sugar cane.

ΪΒ826164 discloses improvements in or relating to molasses treatment.

ΪΒ249759 discloses a process for the treatment of molasses and sugary juices.

JB 190106931 discloses improvements relating to the treatment of liquid waste roducts obtained in the manufacture of sugar.

JS4009046 discloses a process for treating sugar-factory molasses.

JS2002069987 discloses an integrated process for the combined fermentation and le conversion of liquid and solid residues generated by the cane sugar industry ito a variety of useful products. The process combines elements of alcohol-based rganosolv pulping with fermentation.

JS2011117620 discloses a process for producing methane from process water and iogenic material such as that occurring in the production of sugar and ethanol.

!Nl 01979477 discloses a process for preparing the biomass fuel rod from stevia jbaudiana sugar waste residues. It includes the steps of fermenting, heating, rying, cooling, compressing, and molding. The biomass fuel rod produced by the rocess has the advantages of large capacity, small volume, high calorific value, igh combustibility, convenience in use, cleanness, sanitation, environmental- riendliness, low sulfur dioxide (S02) emission and low NOx generation in the •rocess of combustion, environmentally-friendly energy source and no nvironmental pollution.

"Nl 01250066 discloses a method for producing biological leaf fertilizer by using /aste molasses of sugar plant.

JS201 1124894 discloses a method for obtaining long chain aliphatic alcohols and atty acids from sugar cane mud and related wax esters. The solid waste resulting rom the process can be disposed of or utilized as a soil substitute following an ptional water wash. ίΡ0949204 discloses a water treatment process for waste water containing sugar or lcohol.

JS2010047889 discloses a method and apparatus for continuous flow bio-fuel roduction. In this, feedstocks include, but are not limited to, material normally iscarded from food production facilities including drink syrups, juices or waste ater from corn or sugar processing plants. here is no system or method which discloses a complete or an end-to-end self- Listainable integrated zero influent and zero discharge waste to energy process for ^•eating sugar Factory effluent and distillery spent wash.

Objects of the Invention:

ji object of the invention is to provide a self-sustainable sugar Factory based ^aste management system and process. riother object of the invention is to provide a self-sustainable sugar Factory based aste management system and process incorporating waste components / items icluding 1) Press Mud; 2) Sugar Factory Effluent; and 3) Distillery Spent Wash. et another object of the invention is to provide an integrated sugar Factory based aste management system and process, involving various waste items from the igar based Factory. till another object of the invention is to provide a system which converts sugar ictory press mud, sugar Factory effluent, distillery spent wash into electrical ;)wer, solid fuel and useable water. n additional object of the invention is to provide a self- sustainable integrated igar Factory waste management system and process. et an additional object of the invention is to provide a self-sustainable sugar ctory waste produce based energy generation system and process. till an additional object of the invention is to provide a self-sustainable sugar ctory waste recycling system and process. nother additional object of the invention is to provide a self- sustainable sugar ctory waste based system which produces and provides additional solid fuel to risting sugar Factory co-generation plant so that they operate for more number of lys. et another additional object of the invention is to provide a self-sustainable sugar ictory waste water recycling plant. till another object of the invention is to increase the working productivity of the igar factory and affiliated industries. n additional object of the invention is to protect environment. et an additional object of the invention is to provide a sustainable waste disposal, aste management, and subsequent energy production and useful byproduct ;neration activity. till an additional object of the invention is to provide a revenue generating lechanism for a defined portion of the community. nother additional object of the invention is to provide a system which converts aste items or waste components into energy and useful items which include ectrical power, solid fuel, and O water. ummary of the Invention:

ccording to this invention, there is provided a self-sustainable zero influent and ;ro discharge waste to energy system and method for treating sugar factory fluent and distillery spent wash, said system comprises:

- first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate; - second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and liquid filtrate from micro strainer for obtaining biogas and dilute organic liquid effluent digestate;

- Biogas Cleanup Module adapted to receive said biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for converting hazardous hydrogen sulphide in the biogas into elemental sulphur and moisture-free Dry biogas;

- Biogas Engine Generator Module adapted to receive said moisture-free Dry biogas from said Biogas Cleanup Module, luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for producing electrical power, hot exhaust gas and hot water;

- Biogas Engine Exhaust Gas Waste Heat Recovery Module adapted to receive said hot exhaust gas from said Biogas Engine Generator Module and hot condensate water from Solid Fuel Module for producing steam, and cooled exhaust gas for expulsion into atmosphere;

- Solid Fuel Module adapted to receive said organic digestate from said first Biomethanation and Anaerobic Digestion Module, hot water from said Biogas Engine Generator Module, steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing solid fuel for a co- generation plant, Liquid Filtrate from Micro strainer for said second Biomethanation and Anaerobic Digestion Module; and warm water to maintain temperature for the said first and Second Biomethanation and Anaerobic Digestion Module; and

- Reverse Osmosis Waste Water Treatment Module adapted to receive said diluted organic liquid effluent digestate from said second Biomethanation and Anaerobic Digestion Module for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent as feed to first Biomethanation and Anaerobic Digestion Module. ypically, said first Biomethanation and Anaerobic Digestion Module is a Long etention Time Biomethanation and Anaerobic Digestion Module. ypically, said first Biomethanation and Anaerobic Digestion Module comprises ugar factory Effluent tank adapted to store sugar factory effluent. ypically, said first Biomethanation and Anaerobic Digestion Module comprises torage Silo adapted to store press mud. ypically, said first Biomethanation and Anaerobic Digestion Module comprises O reject effluent tank adapted to store RO reject effluent. ypically, said first Biomethanation and Anaerobic Digestion Module comprises a rst Anaerobic Digester/Reactor adapted to receive sugar factory effluent, Press [ud, and RO Reject in pre-defined portions so that digestion of complex organic ed takes place for a pre-defined period (retention time) for being broken down to simple organic compounds resulting in the production of biogas. ypically, said first Biomethanation and Anaerobic Digestion Module comprises a rst Anaerobic Post Digester/Reactor, adapted to receive feed from a first naerobic Digester/Reactor, where the simple organic compounds are digested by licroorganisms for a pre-defined period (retention time) resulting in the roduction of Biogas and Organic Digestate.

'ypically, said second Biomethanation and Anaerobic Digestion Module is a Short Letention Time Biomethanation and Anaerobic Digestion Module.

'ypically, said second Biomethanation and Anaerobic Digestion Module omprises storage tank for storing Distillery Spent Wash and for storing liquid ltrate from micro strainer. ypically, said second Biomethanation and Anaerobic Digestion Module omprises a second Anaerobic Digester/Reactor for receiving distillery spent wash tid Liquid filtrate from Micro Strainer having high COD (Chemical Oxygen >emand) value and high BOD (Biochemical Oxygen Demand) Value so that igestion of complex organic feed takes place for a pre-defined period (retention me) and they are broken down into simple organic compounds resulting in the roduction of biogas. ypically, said second Biomethanation and Anaerobic Digestion Module emprises a second Anaerobic Post Digester/Reactor, adapted to receive feed from le second Anaerobic Digester/Reactor, where the simple organic compounds are igested by microorganisms for a pre-defined period (retention time) resulting in le production of Biogas and Dilute Organic Liquid Effluent Digestate. ypically, said Biogas Cleanup Module comprises means to receive biogas along ith inherent moisture and hydrogen sulfide from said first Biomethanation and diaerobic Digestion Module and said second Biomethanation and Anaerobic )igestion Module. ypically, said Biogas Cleanup Module comprises Biogas Filter Unit adapted to jceive biogas along with inherent moisture and hydrogen sulfide and further dapted to receive air from an air compressor for precipitating out sulphur. ypically, said Biogas Cleanup Module comprises moisture condensing unit dapted to receive biogas, said moisture condensing unit being cooled by cold rater from a refrigerant unit so that moisture condenses and thereafter the loisture-free, dry Biogas is utilized as a fuel in said a Biogas Engine Generator lodule.

'ypically, said Biogas Cleanup Module comprises a feedback means adapted to 3rm a feedback loop for receiving warm water from moisture condensing unit and implying said warm water to a refrigerant unit for providing cold water after ooling the warm water in a closed loop. ypically, said Biogas Engine Generator Module comprises means to receive luke rarm water from said first Biomethanation and Anaerobic Digestion Module and aid second Biomethanation and Anaerobic Digestion Module, which luke warm ^ater is formed due to warm water which was used to heat and maintain ;mperature of said first Biomethanation and Anaerobic Digestion Module and said 2Cond Biomethanation. and Anaerobic Digestion Module. ^'ypically, said Biogas Engine Generator Module comprises means to transfer lukearm water to heat exchanger where heat exchange takes place and Luke Warm Vater is heated up prior to being fed as Hot Water into said Solid Fuel Module.

'ypically, said Biogas Engine Generator Module comprises Biogas Engine fenerator adapted to receive and utilise Dry biogas, as fuel, from said Biogas Cleanup Module, said Biogas Engine Generator further adapted to convert said >ry Biogas into Electrical Power and Hot Exhaust Gas. ypically, said Biogas Engine Generator Module comprises a heat exchanger so lat hot water flows to said Heat Exchanger, from Biogas Engine Generator, for etting cooled and cooled water flows from said Heat Exchanger, to the Biogas ngine Generator, for cooling said generator. ypically, said Biogas Engine Generator Module comprises a first closed loop jedback means adapted to form a closed loop water cooling circuit along with [eat Exchanger and Biogas Engine Generator in order to cool the engine, maintain constant engine temperature, and recover the heat produced in the engine. ypically, said Biogas Engine Generator Module comprises a second closed loop ;edback means adapted to form a closed loop water circuit along with said Solid uel Module and each of said first Biomethanation and Anaerobic Digestion lodule and said second Biomethanation and Anaerobic Digestion Module in order > circulate warm water. ypically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module omprises means to receive hot exhaust gas from said Biogas Engine Generator Module.

^'ypically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module omprises Waste Heat Recovery Boiler adapted to use heat from said hot exhaust as to convert the hot condensate water returning from the Solid Fuel Module into team.

'ypically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module omprises closed loop feedback means adapted to provide a circulating closed loop ath for hot condensate water from said Solid Fuel Module to said Waste Heat .ecovery Boiler. ypically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module omprises Waste Heat Recovery Boiler adapted to output cooled exhaust gas btained on account of transfer of heat of said Hot Exhaust Gas in said Waste Heat .ecovery Boiler. ypically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module Dmprises a chimney adapted to safely expel cooled exhaust gas, into the tmosphere, from said Waste Heat Recovery Boiler. ypically, said Solid Fuel Module comprises De-watering Screw Press adapted to ;ceive said organic digestate, from said first Biomethanation and Anaerobic digestion Module, for solid liquid separation in order to obtain Solids and Liquid •igestate. ypically, said Solid Fuel Module comprises a micro strainer for receiving liquid Lgestate from De-watering Screw Press for recovering smaller Solids particle om said Liquid Digestate. ypically, said Solid Fuel Module comprises a Pre-heater adapted to receive Solids ith high moisture content, said pre-heater utilising the heat from Hot Water from lid Biogas Engine Generator Module to preheat said Solids prior to transferring to lid Solid Fuel Dryer. ypically, said Solid Fuel Module comprises a Solid Fuel Dryer adapted to roduce Solid Fuel by evaporating the moisture from the Solids, thereby reducing Le moisture content and increasing its calorific value. ypically, said Solid Fuel Module comprises a Briquetting Unit adapted to receive )lid fuel from Solid Fuel dryer, said Briquetting Unit further adapted to compact lid Solid fuel into Solid Fuel Briquette for use in Sugar Industry Complex ogeneration Plant to produce electrical power. ypically, said Solid Fuel Module comprises means to receive heat for Solid Fuel yer from steam produced in said Biogas Engine Exhaust Gas Waste Heat ecovery Module. ypically, said Solid Fuel Module comprises closed loop feedback means adapted _* form a closed loop for circulating Hot Condensate Water from Solid Fuel dryer > said Biogas Engine Exhaust Gas Waste Heat Recovery Module. 'ypically, said Solid Fuel Module comprises means to pump Liquid Filtrate from licro Strainer, as a feed, to said second Biomethanation and Anaerobic Digestion lodule. ypically, said Reverse Osmosis Waste Water Treatment Module comprises a pre- lter unit adapted to receive Diluted Organic Liquid Effluent Digestate with low »OD and COD from said second Biomethanation and Anaerobic Digestion lodule. ypically, said Reverse Osmosis Waste Water Treatment Module comprises a .everse Osmosis (RO) Unit adapted to receive filtered effluent from pre-filter unit )r providing a first pre-defined portion of reverse osmosis usable water and a 3Cond remainder pre-defined portion of reverse osmosis reject effluent, said first re-defined portion adapted to be transferred to a Reverse Osmosis Water Storage ank to be recycled and said second pre-defined portion adapted to be used as feed )r first Biomethanation and Anaerobic Digestion Module. ypically, said Reverse Osmosis Waste Water Treatment Module comprises means ) transfer organic filter residue from the pre-filter unit as a feed for the first iomethanation and Anaerobic Digestion Module. ypically, said Reverse Osmosis Waste Water Treatment Module comprises means > transfer Concentrated Liquid RO Reject effluent as a feed for the first iomethanation and Anaerobic Digestion Module. According to this invention, there is provided a self-sustainable zero influent and ero discharge waste to energy method for treating sugar factory effluent and listillery spent wash, said method comprises the steps of:

- first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate;

- second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and Liquid Filtrate from Micro- Strainer for obtaining biogas and dilute organic liquid effluent digestate;

- receiving said Biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Cleanup Module, for converting hazardous hydrogen sulphide into elemental sulphur, and moisture- free Dry biogas;

- receiving said moisture-free Dry biogas from said Biogas Cleanup Module, hike warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Engine Generator Module, for producing electrical power, hot exhaust gas and hot water;

- receiving said hot exhaust gas from said Biogas Engine Generator Module, receiving hot condensate water from said Solid Fuel Module thereafter, using Biogas Engine Exhaust Gas Waste Heat Recovery Module, for producing steam, and cooled exhaust gas for expulsion into atmosphere;

- receiving said organic digestate from said first Biomethanation and Anaerobic Digestion Module, Hot Water from said Biogas Engine Generator Module, Steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module, using Solid Fuel Module, for producing solid fuel for a co- generation plant, Liquid Filtrate from micro Strainer for said second Biomethanation and Anaerobic Digestion Module; and

- Receiving said diluted organic liquid effluent digestate from said second Biomethanation and Anaerobic Digestion Module, using Reverse Osmosis Waste Water Treatment Module, for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent.

Irief Description of the Accompanying Drawings:

'he invention will now be described in relation to the accompanying drawings, in diich: igure 1 illustrates a schematic of the self-sustainable zero influent and zero ischarge waste to energy system and method for treating sugar factory effluent nd distillery spent wash; igure 2 illustrates a schematic of the first (Long Retention Time) Biomethanation nd Anaerobic Digestion Module of the system of Figure 1 ; igure 3 illustrates a schematic of the second (Short Retention Time liomethanation) and Anaerobic Digestion Module of the system of Figure 1; igure 4 illustrates a schematic of the Biogas Cleanup Module of the system of igure 1; igure 5 illustrates a schematic of the Biogas Engine Generator Module of the ^stem of Figure 1; igure 6 illustrates a schematic of the Biogas Engine Exhaust Gas Waste Heat ecovery Module of the system of Figure 1; igure 7 illustrates a schematic of the Solid Fuel Module of the system of Figure 1 ; [id igure 8 illustrates a schematic of the RO Waste Water Treatment Module of the /stem of Figure 1. etailed Description of the Accompanying Drawings:

ccording to this invention, there is provided a self-sustainable zero influent and ΪΓΟ discharge waste to energy system and method for treating sugar factory ffluent and distillery spent wash. igure 1 illustrates a schematic of this system (100). i accordance with an embodiment of this invention, there is provided a first .iOng Retention Time) Biomethanation and Anaerobic Digestion Module 5ADM-L). igure 2 illustrates a schematic of the first (Long Retention Time) Biomethanation id Anaerobic Digestion Module (BADM-L) of the system of Figure 1. ugar factory Effluent from a Storage Tank (1), Press Mud from a Storage Silo (2) id RO Reject (3) are fed into a first Anaerobic Digester/Reactor (6). The feeding antity of press mud is determined based on number of days of plant operation Lat is desired. Here, digestion of complex organic feed takes place for a period etention time) which would be between about 20 to 30 days and they are broken awn into simple organic compounds. fter completion of desired retention time, the feed from the first Anaerobic igester/Reactor (6) is pumped into a first Anaerobic Post Digester/Reactor (7), here the simple organic compounds are digested by microorganisms for a period etention time) which would be between about 20 to 30 days and result in the roduction of Biogas (10) and Organic Digestate (33). enerated biogas (10) is supplied as feed to a Biogas Cleanup Module (BCM) (as :en in Figure 4 of the accompanying drawings). rganic digestate (33) is supplied as feed to a Solid Fuel Module (SFM) (as seen in igure 7 of the accompanying drawings).

L accordance with another embodiment of this invention, there is provided a !cond (Short Retention Time) Biomethanation and Anaerobic Digestion [odule (BADM-S). igure 3 illustrates a schematic of the second (Short Retention Time iomethanation) and Anaerobic Digestion Module (BADM-S) of the system of gurc 1. ⁾istillery Spent Wash from Storage Tank (4) and Liquid Filtrate from Micro itrainer (5) having high COD (Chemical Oxygen Demand) value and high BOD Biochemical Oxygen Demand) Value are fed into a second Anaerobic UASB Upflow Anaerobic Sludge Blanket) or similar suitable Digester/Reactor (8), where igestion of complex organic feed takes place for a period (retention time) which ^ould be between about 1 to 4 days and they are broken down into simple organic ompounds.

^'hereafter, the feed is pumped into second Anaerobic UASB (Upflow Anaerobic ludge Blanket) or similar suitable Post Digester/Reactor (9), where the simple rganic compounds are digested by microorganisms for a period (retention time)hich would be between about 1 to 4 days and result in the production of Biogas 10) which would be an input for the said Biogas Cleanup Module and Dilute ⁾rganic Liquid Effluent Digestate (34) which would be an input for the said Solid uel Module. i accordance with yet another embodiment of this invention, there is provided a liogas Cleanup Module (BCM). igure 4 illustrates a schematic of the Biogas Cleanup Module (BCM) of the stem of Figure 1. he Biogas (10) produced in the first (Long Retention Time) Biomethanation and aiaerobic Digestion Module (BADM-L) and in the second (Short Retention Time) iiomethanation and Anaerobic Digestion Module (BADM-S) contains biogas with loisture and H2S. The Biogas (10) is first transferred into a Biogas Filter Unit 14). An air compressor (37) supplies air (38) to the biogas filter unit (14). This nit (14) contains multiple iron mesh through which biogas (10) and air (38) is assed. Here, Sulphur deposits onto the mesh. Biogas along with Moisture is ansferred for further processing to a moisture condensing unit (36). Moisture long with Biogas, as output , from Biogas filter unit (14), is referenced by numeral 0. he moisture condensing unit (36) uses cold water (44) produced in the efrigerant unit (43). In the moisture condensing unit (36), moisture condenses and lereafter the moisture-free, Dry Biogas (40) is utilized as a fuel in a Biogas Engine Generator Module (BEGM) (as seen in Figure 5 of the accompanying rawings). Warm water (42) which is an output from the moisture condensing unit ; fed back as a feed in a closed loop back to the Refrigerant Unit (43). he Sulphur (39) from Biogas filter is collected (in a module referenced by umeral 49 in the accompanying drawings), bagged and sold to sugar factory. l accordance with still another embodiment of this invention, there is provided a iiogas Engine Generator Module (BEGM). igure 5 illustrates a schematic of the Biogas Engine Generator Module (BEGM) f the system of Figure 1.

>ry Biogas (40) from Biogas Cleanup Module (BCM) (as seen in Figure 4 of the ccompanying drawings) is utilised as fuel for Biogas Engine Generator (17). he Biogas Engine Generator (17) converts the Dry Biogas (40) into Electrical ower (23) and Hot Exhaust Gas (26). The hot exhaust gas (26) is fed to a Biogas Ingine Exhaust Gas Waste Recovery Module (BGWM) (as seen in Figure 6 of the ccompanying drawings). i closed Loop water cooling circuit along with Heat Exchanger (41) is included as part of Biogas Engine Generator (17) in order to cool the engine, maintain a onstant engine temperature and recover the heat produced in the engine. Hot rater (48) flows to the Heat Exchanger (41), from the biogas engine generator 17), for getting cooled and Cooled water flows from the Heat Exchanger (41), to le biogas engine generator (17), for cooling the biogas engine generator (17).

/arm Water (42) which was used to heat and maintain temperature of first (Long .etention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) (as 2en in Figure 2 of the accompanying drawings) and second (Short Retention ime) Biomethanation and Anaerobic Digestion Module (BADM-S) (as seen in igure 3 of the accompanying drawings) comes out as luke warm water (45). This ike warm water (45) is fed into heat exchanger (41) where heat exchange takes lace and Luke Warm Water (45) is heated up prior to being fed as Hot Water (54) lto a Solid Fuel Module (SFM) (as seen in Figure 7 of the accompanying rawings).

/arm water (42) from the Solid Fuel Module (SFM) (as seen in Figure 7 of the xompanying drawings) is fed in a feedback loop to the first (Long Retention ime) Biomethanation and Anaerobic Digestion Module (BADM-L) (as seen in igure 2 of the accompanying drawings) and second (Short Retention Time) iomethanation and Anaerobic Digestion Module (BADM-S) (as seen in Figure 3 f the accompanying drawings), simultaneously. n accordance with an additional embodiment of this invention, there is provided a iiogas Engine Exhaust Gas Waste Heat Recovery Module (BGWM). figure 6 illustrates a schematic of the Biogas Engine Exhaust Gas Waste Heat Recovery Module (BGWM) of the system of Figure 1. leat from the Hot Exhaust Gas (26) produced by Biogas Engine Generatorlodule (BEGM) (as seen in Figure 5 of the accompanying drawings) is used and ecovered by a Waster Heat Recovery Boiler (18), which uses this heat to convert le hot condensate water (27) returning from the Solid Fuel Module (SFM) (as een in Figure 7 of the accompanying drawings) into steam (28).

^"his steam (28) is used as process heat by the Solid Fuel Module (SFM) (as seen in igure 7 of the accompanying drawings). After transferring heat, the steam (28), /ill condense into hot condensate water (27). lie hot condensate water (27) is used as feed again in a closed loop by the Waste [eat Recovery Boiler (18). he Hot Exhaust Gas (26) on account of transfer of heat in the Waste Heat scovery Boiler (18) would now have a much reduced temperature and may be ow called cooled exhaust gas (25). This gas can now be safely expelled into tmosphere through a Chimney (24). i accordance with yet an additional embodiment of this invention, there is rovided a Solid Fuel Module (SFM). igure 7 illustrates a schematic of the Solid Fuel Module (SFM) of the system of igure 1. fter appropriate retention time the Organic Digestate (33) (consisting of solid and quid), from the first (Long Retention Time) Biomethanation and Anaerobic igestion Module (BADM-L) (as seen in Figure 2 of the accompanying drawings), pumped into a De- watering Screw Press (15) for solid liquid separation. Here, ie Digestate (33) is separated into Solids (29) and Liquid Digestate (30). he Liquid Digestate (30) from De- watering Screw Press (15) is then transferred to a Micro strainer (16) for recovering smaller particle Solids (29) from the iquid Digestate (30). he solids (29) with high moisture content is then transferred into a Pre-heater (47) hich utilizes the heat from Hot Water (54) from Biogas Engine Generator [odule (BEGM) (as seen in Figure 5 of the accompanying drawings) to preheat e solids (29) prior to transferring to a Solid Fuel Dryer (19). The heated solids is ferenced by numeral 51. The warm water (42) from the pre-heater (47) is given ; feed to the first (Long Retention Time) Biomethanation and Anaerobic igestion Module (BADM-L) (as seen in Figure 3 of the accompanying drawings) td the second (Short Retention Time) Biomethanation and Anaerobic Digestion dule (BADM-S) (as seen in Figure 3 of the accompanying drawings). the Solid Fuel Dryer (19) the Solid Fuel (20) is produced by evaporating the oisture from the Solids (29) thereby reducing the moisture content and increasing e calorific value. he Solid Fuel (20), which is fibrous in nature, is transferred to a Briquetting Unit I I), where the solid fuel is compacted into Solid Fuel Briquette (13), which is ien stored and used as fuel in existing Sugar Industry Complex Cogeneration lant (22) to produce additional electrical power. he heat for this dryer is provided by Steam (28) produced in the Biogas Engine xhaust Gas Waste Heat Recovery Module (BGWM) (as seen in Figure 6 of the :companying drawings.) he steam (28) after transferring heat in the Solid Fuel Dryer (19) condenses into ot Condensate Water (27). This Hot condensate water is used in a closed loop as :ed again for the Biogas Engine Exhaust Gas Waste Heat Recovery Module 3GWM) (as seen in Figure 6 of the accompanying drawings.) he Liquid Filtrate (5) from Micro Strainer (16) is then pumped as a feed to the ;cond (Short Retention Time) Biomethanation and Anaerobic Digestion Module 3ADM-S) (as seen in Figure 3 of the accompanying drawings). l accordance with still an additional embodiment of this invention, there is rovided a RO Waste Water Treatment Module (WTM). igure 8 illustrates a schematic of the RO Waste Water Treatment Module (WTM) f the system of Figure 1. iluted Organic Liquid Effluent Digestate (34) with low BOD and COD from ;cond (Short Retention Time) Biomethanation and Anaerobic Digestion Module BADM-S) (as seen in Figure 3 of the accompanying drawings) is pumped into a re-filter unit (35).

Tie filtered effluent (52) is then pumped into a Reverse Osmosis (RO) Unit (11). this RO unit (11), close to 70% of the liquid effluent is converted to RO Usable ter (31) and 30% of the effluent is expelled as Concentrated Liquid RO Reject :ffluent (3).

_ portion of the pure water is utilised as process water within the plant and balance /ater is transferred to RO Water Storage Tank (12) to be recycled (53). he organic filter residue (46) from the pre-filter unit (35) and the Concentrated -iquid RO Reject effluent (3) is used as a feed for the first (Long Retention Time) liomethanation and Anaerobic Digestion Module (BADM-L) (as seen in Figure 2 f the accompanying drawings). he advantages of the proposed invention lie in provisioning a self-sustainable ollaborative platform for treating the waste items from the sugar Factory for the allowing advantages:

) zero influent;

ater required for the sugar Factory would be available from the system and lethod of this invention and hence sugar factory need not depend on ground water r municipal water. Hence fresh water resources need not be tapped by the factory.

) zero discharge; here is no solid or liquid waste that is generated from the system and method of lis invention.

I electrical power;

sefiil renewable energy in the form of electrical power is produced in the system id method of this invention.

I solid fuel;

he organic waste streams are converted into solid fuel, using the system and lethod of this invention, which would provide feed in the form of solid fuel for iQ existing Sugar Industry Cogeneration Power Plant. i water;

0 water is produced by the system and method of this invention, which is a much jeded and useful product. cogeneration plant;

he sugar Factory cogeneration power plant which prior to utilizing this invention aerates between about 180 to 200 days, now due to the availability of additional )lid fuel will be able to operate for more number of days, bringing in additional venue and commercial value, due to the system and method of this invention.

1 distillery;

n account of Zero Discharge by the system and method of this invention, the stillery can now operate without pollution control board restrictions for more imber of days (including off-season) bringing in additional revenue and )mmercial value. ) eliminating polluting components.

he system and method of this invention provides a self sustainable waste to lergy solution, which not only eliminates waste and environmental issues >sociated with waste, but also, provides useful energy products there by snerating revenue and making utilization of this process commercially viable and tcrative.

/hile this detailed description has disclosed certain specific embodiments of the resent invention for illustrative purposes, various modifications will be apparent » those skilled in the art which do not constitute departures , from the spirit and :ope of the invention as defined in the following claims, and it is to be distinctly iderstood that the foregoing descriptive matter is to be interpreted merely as iustrative of the invention and not as a limitation.

Claims

claim,

1. A self- sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent and distillery spent wash, said system comprising:

- second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and liquid filtrate from Micro Strainer for obtaining biogas and dilute organic liquid effluent digestate;

- Biogas Cleanup Module adapted to receive said biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for converting hazardous hydrogen sulphide in the biogas into elemental sulphur, and moisture-free Dry biogas;

Biogas Engine Exhaust Gas Waste Heat Recovery Module adapted to receive said Hot Exhaust Gas from said Biogas Engine Generator Module and hot condensate water from said Solid Fuel Module for producing Steam, and cooled exhaust gas for expulsion into atmosphere;

- Solid Fuel Module adapted to receive said organic digestate from first Biomethanation and Anaerobic Digestion Module, hot water from said Biogas Engine Generator Module, steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing solid fuel for a co- generation plant, liquid filtrate from Micro strainer for said second Biomethanation and Anaerobic Digestion Module; Hot condensate water from Solid Fuel Dryer returned in close loop to said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing steam; and

- Reverse Osmosis Waste Water Treatment Module adapted to receive said diluted organic liquid effluent digestate from said second Biomethanation and Anaerobic Digestion Module for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent as feed to first Biomethanation and Anaerobic Digestion Module.

2. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module is a Long Retention Time Biomethanation and Anaerobic Digestion Module.

3. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising Sugar factory Effluent tank adapted to store sugar factory effluent.

4. A system as claimed in claim 1 wherein, said first Biomethanatipn and Anaerobic Digestion Module comprising Storage Silo adapted to store press mud.

5. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising RO reject effluent tank adapted to store RO reject effluent.

6. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising a first Anaerobic Digester/Reactor adapted to receive sugar factory effluent, Press Mud, and RO Reject in predefined portions so that digestion of complex organic feed takes place for a pre-defined period (retention time) for being broken down into simple organic compounds resulting in the production of biogas.

7. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising a first Anaerobic Post Digester/Reactor, adapted to receive feed from a first Anaerobic Digester/Reactor, where the simple organic compounds are digested by microorganisms for a pre-defined period (retention time) resulting in the production of Biogas and Organic Digestate.

8. A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module is a Short Retention Time Biomethanation and Anaerobic Digestion Module.

9. A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module comprising storage tank for storing Distillery Spent Wash and for storing liquid filtrate from micro strainer.

10. A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module comprising a second Anaerobic Post Digester/Reactor for receiving distillery spent wash and Liquid filtrate from Micro Strainer having high COD (Chemical Oxygen Demand) value and high BOD (Biochemical Oxygen Demand) Value so that digestion of complex organic feed takes place for a pre-defined period (retention time) and they are broken down into simple organic compounds resulting in the production of biogas.

11. A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module comprising a second Anaerobic Post Digester/Reactor, adapted to receive feed from, a second Anaerobic Digester/Reactor, where the simple organic compounds are digested by microorganisms for a pre-defined period (retention time) resulting in the production of Biogas and Dilute Organic Liquid Effluent Digestate.

12. A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising means to receive biogas along with inherent moisture and hydrogen sulfide from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module.

13. A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising Biogas Filter Unit adapted to receive biogas along with inherent moisture and hydrogen sulfide and further adapted to receive air from an air compressor for precipitating out sulphur.

14. A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising moisture condensing unit adapted to receive biogas, said moisture condensing unit being cooled by cold water from a refrigerant unit so that moisture condenses and thereafter the moisture- free, dry Biogas is utilised as a fuel in said Biogas Engine Generator Module.

15. A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising a feedback means adapted to form a feedback loop for receiving warm water from moisture condensing unit and supplying said warm water to a refrigerant unit for providing cold water after cooling the warm water in a closed loop.

16. A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising means to receive luke warm water from said first Biomefhanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module,, which luke warm water is formed due to warm water which was used to heat and maintain temperature of said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module.

17. A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising means to transfer luke warm water to heat exchanger where heat exchange takes place and Luke Warm Water is heated up prior to being fed as Hot Water into said Solid Fuel Module.

18. A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising Biogas Engine Generator adapted to receive and utilise Dry biogas, as fuel, from said Biogas Cleanup Module, said Biogas Engine Generator further adapted to convert said Dry Biogas into Electrical Power and Hot Exhaust Gas.

19. A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising a heat exchanger so that hot water flows to said Heat Exchanger, from Biogas Engine Generator, for getting cooled and cooled water flows from said Heat Exchanger, to the Biogas Engine Generator, for cooling said biogas engine generator.

20. A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising a first closed loop feedback means adapted to form a closed loop water cooling circuit along with Heat Exchanger and Biogas Engine Generator in order to cool the engine, maintain a constant engine temperature, and recover the heat produced in the engine.

21. A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising a second closed loop feedback means adapted to form a closed loop water circuit along with said Solid Fuel Module and each of said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module in order to circulate warm water.

22. A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising means to receive hot exhaust gas , from said Biogas Engine Generator Module.

23. A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising Waste Heat Recovery Boiler adapted to use heat from said hot exhaust gas to convert the hot condensate water returning from the Solid Fuel Module into steam.

24. A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising closed loop feedback means adapted to provide a circulating closed loop path for hot condensate water from said Solid Fuel Module to said Waste Heat Recovery boiler.

25. A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising Waste Heat Recovery Boiler adapted to output cooled exhaust gas obtained on account of transfer of heat of said Hot Exhaust Gas in said Waste Heat Recovery Boiler.

26. A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising a chimney adapted to safely expel cooled exhaust gas, into the atmosphere, from said Waste Heat Recovery Boiler.

27. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising De-watering Screw Press adapted to receive said Organic Digestate, from said first Biomethanation and Anaerobic Digestion Module, for solid liquid separation in order to obtain Solids and Liquid Digestate.

28. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a micro strainer for receiving liquid digestate from De-watering Screw Press for recovering smaller Solid particle from said Liquid Digestate.

29. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a Pre-heater adapted to receive Solids with high moisture content, said pre- heater utilising the heat from Hot Water from said Biogas Engine Generator Module to preheat said solids prior to transferring to said Solid Fuel Dryer.

30. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a Solid Fuel Dryer adapted to produce Solid Fuel by evaporating the moisture from the Solids, thereby reducing the moisture content and increasing its calorific value.

31. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a Briquetting Unit adapted to receive Solid Fuel from Solid Fuel dryer, said Briquetting Unit further adapted to compact said solid fuel into Solid Fuel Briquette for use in Sugar Industry Complex Cogeneration Plant to produce Electrical power.

32. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising means to receive heat for Solid Fuel Dryer from steam produced in said Biogas Engine Exhaust Gas Waste Heat Recovery Module.

33. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising closed loop feedback means adapted to form a closed loop for circulating Hot Condensate Water from Solid Fuel dryer to said Biogas Engine Exhaust Gas'Waste Heat Recovery Module.

34. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising means to pump Liquid filtrate from Micro Strainer, as a feed, to said second Biomethanation and Anaerobic Digestion Module.

35. A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising a pre-filter unit adapted to receive Diluted Organic Liquid Effluent Digestate with low BOD and COD from said second Biomethanation and Anaerobic Digestion Module.

36. A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising a Reverse Osmosis (RO) Unit adapted to receive filtered effluent from pre-filter unit for providing a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent, said first pre-defined portion adapted to be transferred to a Reverse Osmosis Water Storage Tank to be recycled and said second pre-defined portion adapted to be used as feed for first Biomethanation and Anaerobic Digestion Module.

37. A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising means to transfer organic filter residue from the pre-filter unit as a feed for the first Biomethanation and Anaerobic Digestion Module.

38. A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising means to transfer Concentrated Liquid RO Reject effluent as a feed for the first Biomethanation and Anaerobic Digestion Module.

39. A self-sustainable zero influent and zero discharge waste to energy method for treating sugar factory effluent and distillery spent wash, said method comprising the steps of:

- receiving said biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Cleanup Module, for converting hazardous hydrogen sulphide in the biogas into elemental sulphur, and moisture-free dry biogas;

- receiving said moisture-free dry biogas from said Biogas Cleanup Module, luke warm water from said, first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Engine Generator Module, for producing electrical power, hot exhaust gas and hot water;

- receiving said hot exhaust gas from said Biogas Engine Generator Module, hot condensate water from the said Solid Fuel Module, using Biogas Engine Exhaust Gas Waste Heat Recovery Module, thereafter, for producing steam, and cooled exhaust gas for expulsion into atmosphere;