Post on 22-Jun-2015
description
Dr Smarajit Roy (Neat U Loo) 1
Technological Development from Biogas Plant to Anaerobic Digestion; Use of Logic Model to
Develop a Poly System Supply Chain Management
China Bio-Energy Technology & Investment Summit20th-21st May 2010
Dr. Smarajit Roy
Dr Smarajit Roy (Neat U Loo) 2
Aerobic Digestion
Biogas collection
SealInlet
Slurry
Biogas
Removable cover
Overflow tank
Outflow
Dr Smarajit Roy (Neat U Loo) 3
Anaerobic Digestion Process
Hydrolysis Acidogenesis Acetogenesis Methanogenesis
Carbohydrates
Fats
Proteins
Sugars
Fatty Acids
Amino Acids
Carbonic Acids & Alcehols
Hydrogen Carbon Dioxide
Ammonia
Hydrogen Acetic &
Carbon Dioxide
MethaneCarbon Dioxide
C6H12O6 → 3CO2 + 3CH4
Dr Smarajit Roy (Neat U Loo) 4
Anacis Island Wastewater Treatment Plant
Dr Smarajit Roy (Neat U Loo) 5
EEH (Steam) Energy Balance
stevebungay@monsal.co.uk,( 13th European Biosolids & Organic Resources Conference & Workshop.)
6
THERMAL HYDROLYSIS IMPACT ON POWER GENERATION
Dr Smarajit Roy (Neat U Loo)
Pasteurization DewateringTransport
Hydrolysis – breaks down large molecules to improve digestion
Dewatering Transport
Dr Smarajit Roy (Neat U Loo) 7
Enhanced Enzymic Hydrolysis
Dr Smarajit Roy (Neat U Loo) 8
Enhanced Enzymic Hydrolyis (Steam Heating) Flow Sheet
Dr Smarajit Roy (Neat U Loo) 9
Thermal Hydro
• Cambi’s Thermal Hydrolysis Plant (THP)
• Black & Veatch Contracting UK installed plant at Celtic Anglian Water (CAW)
Dr Smarajit Roy (Neat U Loo) 10
Cambi’s Largest Thermal Hydrolysis Plant
• £75M sludge treatment contract• Plant will process biosolids which can be applied to
land as fertilizer• Heat & Power Plant to generate up to 10 MegaWatts
of Electricity• UK has set target of 15% of energy supplied by the
national grid to come from renewable sources by 2020• Plant expected to handle around 91,000 tonnes of dry
solids per year• Digestion Plant will serve a population of 3M people
Dr Smarajit Roy (Neat U Loo) 11
Bran Sands, Tees Valley, England英国 , (44 MGD + 68 MGD imports)
• 36,000 tonnes DS/year
• Digester loading up to 6 kg VS/m3/ day
(2-3 x conventional digestion)
• 10-12% DS feed to digesters
• >60 % VS reduction
• 5.6 MW electricity generation
• >30% dry solids Class A cake
Courtesy of
Dr Smarajit Roy (Neat U Loo) 12
Cogeneration – Energy Balance, Example 热电联产—能量平衡举例
12,000 metric tons dry solids/year , 80% volatile solids content.处理能力每年 12000 吨干重固体, VS% 为 80%
Bio
gas
沼气
- 4
114
kW
Bio
gas
to e
ngin
e39
70 k
W
Heat loss 热损失 * 544 kW
Electricity 产电1584 kW
Cooling water 冷却水
894 kW
Biogas to steam boiler 沼气供蒸汽锅炉 144 kW
Hot Water** 136 kW
Hot water to 热水HVAC 714 kW
Steam from exhaust 热尾气产蒸汽 948 kW
Thermal Hydrolysis热水解1032 kW
Hot water to 热水 HVAC 743 kW
Warm sludge 热污泥 489 kW
Dr Smarajit Roy (Neat U Loo) 13
WHY USE CAMBI THERMAL HYDROLYSIS?为什么采用水热解 THP技术
提高消化产率 提高能效和封闭消毒 提高沼气产量 高品质生物固体肥料
THP
消化
传
统消
化
14
“Neat U Loo” Process Flow
DYNAMIC HUB
Pool FundingPrivate Capital (Bio-technology
Industries) Major Stakeholder
Government’s ResourcesInternational Resources
(UNO/World Water Authority/Charities)
Users’ involvementUsers are stakeholders Education & Training (Service User gets paid)
- Stop funding that does not work
- Stop planning flush toilets where acute shortage of
drinking water
Empower front line volunteers.
(Local & International NGO'S)
Dr Smarajit Roy (Neat U Loo)
Dr Smarajit Roy (Neat U Loo) 15
Tripartite Partnership
Dr Smarajit Roy (Neat U Loo) 16
Parallel System Water Main (In & Out)Water Mains
Drinking Water Tank
Bath
Sea
Kitchen
Waste Water
Pump
Toilet Water Tank
Toilet
Waste Water
Decentralised Anaerobic Treatment Plant
Combined Heat & Power (CHP) Plant
Urine Separating Decentralised Main
Nitrogen + Phosphorous
Soil Conditioning
Fertilizer
Sludge Holding TankFilter Inorganic
Solids
Waste Water
HOUSE PLANT