KR100242766B1 - Fertilizer using water waste sludge and the process thereof - Google Patents
Fertilizer using water waste sludge and the process thereof Download PDFInfo
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- KR100242766B1 KR100242766B1 KR1019970082704A KR19970082704A KR100242766B1 KR 100242766 B1 KR100242766 B1 KR 100242766B1 KR 1019970082704 A KR1019970082704 A KR 1019970082704A KR 19970082704 A KR19970082704 A KR 19970082704A KR 100242766 B1 KR100242766 B1 KR 100242766B1
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
- C05F7/005—Waste water from industrial processing material neither of agricultural nor of animal origin
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
본 발명은 정수장슬러지, 마사토, 부엽토로 이루어짐을 특징으로 하는 정수장슬러지를 주원료로 한 상토 조성물 및 그의 제조방법에 관한 것이다.The present invention relates to a topsoil composition consisting of water purification sludge, masato, and subleaf soil as a main raw material, and a manufacturing method thereof.
본 발명의 상토 조성물은 기존 방법에 없는 정수장슬러지를 사용하므로서 보수력을 높여주고, 정수장슬러지와 유기물과의 강한 결합에 의한 입단화로 통기성을 좋게하며, 유효규산 및 무기양분을 증가시키므로서 내병성증대 및 무기양분결핍을 해소해 주고, 완충능력을 갖고있어서 상토의 산도교정에 중요한 역할을 하여 정수장슬러지가 상토의 원료로 활용이 가능한 효과가 있다.The topsoil composition of the present invention improves water holding capacity by using water purification sludge which is not in the existing method, improves breathability by granulation by strong bonding of water purification sludge and organic matter, and increases resistance to disease by increasing effective silicic acid and inorganic nutrients. It eliminates nutrient deficiency and has a buffering capacity, which plays an important role in acidity correction of soils.
Description
본 발명은 정수장슬러지, 마사토, 부엽토로 이루어짐을 특징으로 하여, 수분 보유력이 강한 정수장슬러지에 의해 보수력을 증대하고, 정수장슬러지와 유기물과의 단립화에 의한 상토를 제조하여 양호한 생육조건을 조성하여 여러 가지 재배식물의 묘 육성에 안정하게 제공할 수 있는 정수장슬러지를 주원료로 한 상토 조성물 및 그의 제조방법에 관한 것이다.The present invention is characterized in that it consists of purified water sludge, masato, and foliar soil, to increase the water holding capacity by the purified water sludge with strong water retention, and to prepare a good growth conditions by producing a good soil conditions by the granulation of the purified water sludge and organic matter The present invention relates to a topsoil composition comprising a purified water sludge which can stably provide seedling growth of eggplant cultivated plants, and a method for producing the same.
현재 각종 폐기물의 처분이 매립에 의존하고 있어 매립지의 부족난을 야기시키며, 지역이기주의로 더욱 심화될 전망이어서 이의 처분에 큰 문제로 대두되고 있다. 따라서 점토, 미량원소, 영양원소, 유효규산등의 이용 가능한 물질이 많은 정수장슬러지와 유기질물질(부엽토)의 각각의 특성을 상호 보완하여 유용하게 자원화하면, 매립량이 감소되어 매립지의 수명연장으로 매립지의 부족난을 해소하고, 매립처분시 발생되는 침출수 등에 의한 토양 및 지하수의 오염을 방지하고 더 나아가 경제적인 활용방안이 될 수 있다.Currently, the disposal of various wastes relies on landfills, causing shortage of landfills and becoming more prone to local selfishness, which is becoming a big problem in its disposal. Therefore, by supplementing each of the properties of purified water sludge and organic matter (loice) with many available materials such as clay, trace elements, nutrients, and effective silicic acid, the amount of landfill is reduced and the life of landfill is extended. Eliminate shortages, prevent soil and groundwater contamination by leachate, etc. generated during landfill disposal, and further economically can be utilized.
기존의 상토의 제조에는 주원료가 마사토로서 정수장슬러지에 비해 보수력이 낮고, 유효규산 결핍에 의한 병해충에 대한 내병성이 약하고, 수도묘인 경우 도복현상을 야기할 수 있다. 또한 원료수급에 따른 환경훼손 및 공급 한계가 있다.In the production of conventional topsoil, the main raw material is Masato, which has lower water holding capacity than water purification sludge, weak resistance to pests due to lack of effective silicic acid, and may cause doping in the case of rice seedlings. In addition, there are environmental damages and supply limits due to supply and demand of raw materials.
이에 상기 문제점을 해결하기 위해 본 발명자들은 정수장슬러지, 마사토, 부엽토를 혼합함으로써 새로운 상토 조성물을 제조하게 되었다.In order to solve the above problems, the present inventors have prepared a new topsoil composition by mixing the water purification plant sludge, masato, and foliar soil.
본 발명품의 첨가재료로 사용하는 정수장슬러지는 보수력이 높으며, 마사토의 대체물질로 사용이 가능하며, 정수장슬러지내에 점토, 영양원소, 유효규산등이 다량 함유되어 있어 식물의 양분공급원으로서 작용하여 식물의 발아, 뿌리의 근착력, 내병성을 향상시킨다.Water purification plant sludge used as an additive material of the present invention has a high water retention capacity, can be used as a substitute for masato, and contains a large amount of clay, nutrients, and effective silicic acid in the water purification plant sludge, thus acting as a nutrient supply source for plants. Improves germination, rooting, and disease resistance.
중금속과 알루미늄 용출위험이 없으며, 정수장슬러지와 유기물과의 결합에 의한 입단화로 통기성을 좋게하며, 완충능력을 갖고 있어서 상토의 산도교정에 중요한 역할을 한다.There is no risk of leaching heavy metals and aluminum, and it improves air permeability by incorporating water purification sludge and organic matter and plays an important role in acidity correction of soil.
또한 정수장슬러지는 지금까지 이용가능한 어떤 슬러지 보다도 토성과 색상이 일반 토양과 유사하고 식물의 양분흡수에 영향을 미치는 탄질비(C/N비)가 11로서 일반 토양의 탄질비 8~12의 범위에 들어 환경친화적인 재료로서 가장 적합하다.In addition, water purification sludge has a similar carbon / satellite ratio (C / N ratio) that affects the nutrient absorption of plants, with Saturn and color similar to that of ordinary soils, and 11 to 12. For example, it is most suitable as an environmentally friendly material.
본 발명의 특성을 상세히 설명하면 다음과 같다.Referring to the characteristics of the present invention in detail.
첫째, 정수장슬러지의 보수력에 관한 것이다.First, it is about the water holding capacity of water purification plant sludge.
정수장슬러지는 자연함수비가 400~600%범위에 있으며 이는 유기질함량이 높은 토탄의 자연함수비보다 2~3배 높은 값을 보여주고 있다.Water purification plant sludge has a natural water content in the range of 400 ~ 600%, which is 2 ~ 3 times higher than the natural water content of peat with high organic content.
이는 유효수분을 증가시켜 식물생육을 좋게하여 정수장슬러지는 상토에 있어서 중요한 수분저장체이다.This increases the effective moisture to improve the growth of plants and is an important water storage medium for the purified soil sludge.
둘째, 통기성에 관한 것이다.Secondly, it is about breathability.
정수장슬러지의 액성한계는 114.9~484.2%, 소성한계는 58.3~288.2%로서 일반 점토질의 액성한계40~120%, 소성한계 40~70%와 비교하여 매우 높은 값이다.The liquidity limit of the water purification plant sludge is 114.9 ~ 484.2%, and the firing limit is 58.3 ~ 288.2%, which is very high compared to the liquid limit of 40 ~ 120% and the firing limit 40 ~ 70% of general clay.
따라서 소성지수가 일반 점토질보다 높은 정수장슬러지내의 점토와 양성적 성질을 갖은 유기물(부엽토)간의 강한 결합력에 의해 안정한 입단을 형성하므로서 통기성을 좋게하여 물리적성질을 개선시킨다.Therefore, the plasticity index improves the physical properties by improving the breathability by forming stable grains by strong bonding force between clay in water purification sludge having higher plasticity than general clay and organic matter (loice) having positive properties.
셋째, 식물에 유용한 무기양분공급에 따른 내병성 증대이다.Third, increased disease resistance according to the supply of mineral nutrients useful for plants.
정수장슬러지의 치환성염기인 K인 4.4~8.9cmol/kg, Ca는 13.5~29.5cmol/kg, 유효규산은 246~501ppm으로 나타났다.The substitution base of K water purification sludge was 4.4 ~ 8.9cmol / kg, Ca was 13.5 ~ 29.5cmol / kg and effective silicic acid was 246 ~ 501ppm.
정수장슬러지에 부엽토를 첨가함으로써 부엽토의 무기화작용과 부식화작용에 의해 생성되는 이산화탄소와 각종 유기산·무기산 등은 정수장슬러지 중의 광물질과 화학반응을 일으켜 정수장슬러지내의 K,Ca, 유효규산등 식물에 필요한 양분의 가급태화가 촉진되어 식물의 양분 및 내병성을 증대시키므로서 식물생장을 좋게 하는 장점이 있다.Carbon dioxide and various organic acids and inorganic acids produced by the mineralization and corrosiveness of the subleaf soil by adding the subleaf soil to the purified water sludge cause chemical reactions with minerals in the plant wastewater sludge, and the nutrients necessary for plants such as K, Ca and effective silica in the plant wastewater sludge. Promotes as much as possible to increase the nutrient and disease resistance of the plant has the advantage of improving plant growth.
넷째, 완충능력을 갖고 있으며, 활성알루미늄의 위험성이 없다.Fourth, it has a buffering capacity and there is no danger of activated aluminum.
정수장슬러지는 그 발생공정에서 황산알루미늄(Aluminum sulfate, A12(SO4)3) 또는 폴리염화알루미늄(Polyaluminum chloride)을 응집제로 사용하기 때문에 알루미늄을 함유하고 있다.Water purification sludge contains aluminum because aluminum sulfate (A12 (SO4) 3) or polyaluminum chloride is used as flocculant in the process.
정수장슬러지는 XRD 분석결과 quartz, muscovite, kaolinite, albite, microcline 등의 다양한 점토광물로 이루어져 있으며, 주된 구성광물은 quartz로 나타났다.Water purification sludge consisted of various clay minerals such as quartz, muscovite, kaolinite, albite and microcline. The main constituent mineral was quartz.
완충능력을 파악하기 위하여 pH 4, 7, 10으로 조정한 후 시간별 pH 변화를 49시간동안 측정한 결과 24시간 이후 거의 pH 7로 변화하였다.In order to determine the buffering capacity, the pH was adjusted to pH 4, 7, 10, and the pH change over time was measured for 49 hours.
이는 정수장슬러지가 안정한 점토광물의 결정구조를 갖고 잇어서 격자내의 알루미늄 표면의 (-)전하에 의한 H+이온의 흡착으로 완충능력을 갖고 있음을 알 수 있으며, 이는 토양의 산도교정에 중요한 역할을 함을 알 수 있다.This shows that the purified sludge has a stable crystal mineral structure and has a buffering capacity due to the adsorption of H + ions by the negative charge of the aluminum surface in the lattice, which plays an important role in soil acidity correction. Able to know.
격자내의 알루미늄의 완충작용은 다음과 같은 기작에 의해 이루어 진다.The buffering of aluminum in the lattice is achieved by the following mechanism.
＞AlO- + H+ → ＞AlOH＞ AlO- + H + → ＞ AlOH
＞Aloh + H+ →Al(OH)2+Aloh + H + → Al (OH) 2+
또한 알루미늄 용출실험결과 pH 4, 7, 10에서 알루미늄용출이 거의 없었다.In addition, aluminum elution test showed little aluminum elution at pH 4, 7, 10.
산성조건(pH＜5.3)에서 알루미늄은 활성화되어 유기물의 구성분인 유기산과 매우 안정된 Al-유기복합체를 형성하기 때문에 알루미늄을 불용화시킨다.Under acidic conditions (pH <5.3), aluminum is inactivated because it is activated to form a very stable Al-organic complex with organic acids, which are components of organic matter.
그러나 유기물 함량이 높고 pH가 낮을 수록 유기산의 활성이 강해지기 때문에 pH 5.3이하의 강산성 조건에서는 대부분의 알루미늄이 유기산과 강하게 복합체를 형성하게 되므로 알루미늄에 의한 식물독성문제는 무시할 수 있다.However, the higher the organic content and the lower the pH, the stronger the activity of the organic acid. Therefore, in a strong acidic condition below pH 5.3, most aluminum forms a strong complex with the organic acid, so phytotoxicity problems caused by aluminum can be ignored.
이러한 기작에 대한 원리는 유기물이 (-)하전을 띄므로 알루미늄의 산화물 또는 수산화물과 결합하기 때문이다.The principle for this mechanism is that the organic material is negatively charged and therefore combines with the oxide or hydroxide of aluminum.
그러므로 본 발명에서 사용하는 정수장슬러지와 같은 다량의 유기물을 함유하고 있는 원료를 사용하는 경우에는 유기산과 알루미늄 복합체가 다량 생성되므로 알루미늄의 독성을 크게 감소시킬 수 있다.Therefore, when using a raw material containing a large amount of organic matter, such as water purification plant sludge used in the present invention, a large amount of the organic acid and aluminum complex is produced, it is possible to greatly reduce the toxicity of aluminum.
본 발명의 상토는 정수장슬러지가 40~60%, 마사토가 10~20%, 부엽토가 20~30% 함유된 상토 조성물이 특히 바람직하다는 것을 확인하였다.The topsoil of the present invention was confirmed that the topsoil composition containing the water purification sludge 40 ~ 60%, Masato 10 ~ 20%, 20% to 30% of the side leaf soil is particularly preferred.
본 발명의 조성물에 주요성분으로 사용되는 정수장슬러지는 정수장에서 물을 정수한 후에 남게 되는 슬러지를 사용할 수 있으며, 본 발명에서는 정수장에서 발생하는 슬러지를 특별한 가공없이 사용할 수 있다.Water purification plant sludge used as a main component in the composition of the present invention can use the sludge remaining after water purification in the water purification plant, in the present invention can be used without special processing sludge generated in the water purification plant.
본 발명의 조성물에 사용되는 마사토는 토성이 사양토이며 퇴적암에서 풍화된 토양으로 일반 광산에서 채광할 수 있다.Masato used in the composition of the present invention is a saturned sandy loam and can be mined in general mines with weathered soil from sedimentary rocks.
본 발명의 조성물에서 사용하는 부엽토는 상토의 안정제로 쓰인다. 부엽토는 회분이 49% 이하인 것을 사용하며, 질소함량은 30% 이상인 재료를 사용하며, 노지에서 채집된 것을 직접 사용할 수 있다.The foliar soil used in the composition of the present invention is used as a stabilizer of the top soil. The flounder uses less than 49% of ash, uses more than 30% of nitrogen, and can be used directly from the field.
상기 조성비의 범위내에서 정수장슬러지, 마사토, 부엽토를 혼합하여 상토를 제조한다.Within the range of the composition ratio, purified soil sludge, masato, and subleaf soil are mixed to prepare top soil.
본 발명의 상토의 주원료인 정수장슬러지의 폐기물용출실험 결과 유해성이 없는것으로 나타났다.Waste elution test of the water purification plant sludge which is the main raw material of the present invention was found to be not harmful.
또한, 정수장슬러지가 보슈력이 강하며, 정수장슬러지내의 점토 부엽토의 유기물과의 결합에 의한 입단화로 상토의 통기성을 좋게 하여 물리성을 개선시켜 주므로서 발아율과 묘의 생육상태를 좋게한다.In addition, the water purification sludge has a strong Bosch power, and the germination rate and seedling growth are improved by improving the physical properties by improving the air permeability of the clay by combining with the organic matter of the clay subleaf soil in the water purification sludge.
또한, 정수장슬러지는 다량의 안정화된 점토광물로 구성되어 있어 pH 4, 7, 10에서도 알루미늄 용출이 없었으며, 46시간동안 pH 변화를 측정한 결과 24시간 이후에는 모두 pH 7로 변화되었다.In addition, the purified sludge was composed of a large amount of stabilized clay minerals, there was no aluminum leaching at pH 4, 7, 10, and the pH change was measured after 46 hours, all changed to pH 7 after 24 hours.
이는 정수장슬러지내의 알루미늄은 일반 점토광물과같이 결정구조내에 안정하게 존재하며, 완충능력을 갖고 있음을 알 수 있다(실시예 4 참조).It can be seen that aluminum in the water purification plant sludge is stably present in the crystal structure as in general clay minerals and has a buffering capacity (see Example 4).
이는 상토의 산도교정에 중요한 역할을 할것으로 기대된다.This is expected to play an important role in pH correction of soils.
또한, 본 발명품이 시판용 상토보다 월등한 뿌리발육을 하며, 정수장슬러지 처리구의 수도묘는 적립상태였고, 도열병에도 내성이 있는 것으로 관찰 되었다.In addition, the present invention has superior root development than commercially available clay, and the seedlings of the water treatment plant sludge treatment zones were accumulated, and it was observed that they are resistant to blasting.
이것은 정수장슬러지에 다량의 치환성염기와 유효규산을 함유하고 있어, K, Ca 함량증대와 식물의 규산흡수에 의한 내병성을 증대시켜 주었으며, 정수장슬러지 내의 점토에 의한 보수력을 향상시켜 주었으며, 유기물과의 결합에 의한 입단화를 형성하여 상토의 통기성을 좋게하여 물리성의 개량효과가 있는 것으로 본다.It contains a large amount of substitution base and effective silicic acid in the water purification plant sludge, which increases the K and Ca contents and the disease resistance due to the absorption of silicic acid of the plant, and improves the water holding capacity of the clay in the water purification plant sludge. It is considered to have the effect of improving physical properties by forming granulation by bonding to improve the air permeability of the soil.
본 발명의 상토 조성물은 현재 사회적으로 문제시 되고 있는 폐기물을 재활용하여 부가가치화할 뿐만 아니라, 폐기물의 재활용으로 인한 환경오염을 방지하고, 매립장의 부족난을 해소하며, 기존 방법에 없는 정수장슬러지를 사용하므로서 보수력을 향상시키고, 정수장슬러지와 부엽토의 유기물과의 강한 결합에 의한 단립화로 통기성을 좋게하며, 유효규산 및 무기양분을 증가시키므로서 내병성증대 및 무기양분결핍을 해소해 주고, 완충능력을 갖고 있어 상토의 산도교정에 중요한 역할을 한다The topsoil composition of the present invention not only adds value by recycling wastes that are currently socially problematic, but also prevents environmental pollution due to recycling of wastes, eliminates shortage of landfills, and maintains water by using water purification plant sludge that does not exist in existing methods. Improves air permeability by increasing the efficiency of silicic acid and inorganic nutrients by increasing the effective silicic acid and inorganic nutrients. Plays an important role in pH correction
하기 실시예는 본 발명을 보다 구체적으로 설명하는 것이며, 본 발명의 범위 를 한정하는 것은 아니다.The following examples illustrate the invention in more detail, and do not limit the scope of the invention.
[실시예 1]Example 1
전체 조성물 중량을 기준으로 하여 60%의 정수장슬러지, 40%의 미사토를 혼합하므로서 상토조성물을 제조한다.A topsoil composition is prepared by mixing 60% water purification sludge and 40% misato based on the total composition weight.
[실시예 2]Example 2
전체 조성물 중량을 기준으로 하여 60%의 정수장슬러지, 20%의 마사토, 20%의 부엽토를 혼합하므로서 상토 조성물을 제조한다.The topsoil composition is prepared by mixing 60% water purification sludge, 20% masato and 20% side loam based on the total composition weight.
[실시예 3]Example 3
[최종제품의 품질평가][Quality Evaluation of Final Product]
상기 실시예 1,2에서 제조된 정수장슬러지 및 상토 시험구에 대한 폐기물용출실험결과 중금속의 함량은 표 1에서 보는바와 같이 원료에서와 마찬가지로 검출되지 않았다.Waste dissolution test results for the water purification plant sludge and soil test plots prepared in Examples 1 and 2 were not detected as in the raw material as shown in Table 1.
[실시예 4]Example 4
[알루미늄 용출실험][Aluminum Dissolution Experiment]
본 발명의 조성물중에 함유된 정수장슬러지는 XRD 분석결과 quartz, muscovite, kaolinite, albite, microcline 등의 다양한 점토광물로 이루어졌으며, 주된 구성광물은 quartz로 나타났다.The purified water sludge contained in the composition of the present invention was composed of various clay minerals such as quartz, muscovite, kaolinite, albite, microcline, etc., and the main component mineral was quartz.
이와 같이 점토광물로 이루어진 정수장슬러지의 알루미늄에 대한 환경유해성을 파악하기 위하여 정수장슬러지 1g에 증류슈 30ml을 넣어 pH 2, 4, 7, 10으로 조정한후 시간별 pH변화를 측정한 결과 그림 1에 나타난 바와 같이, pH 4, 7, 10은 24시간 이후 거의 pH 7로 변하였으나, pH 2는 24시간 이후 pH 4부근으로 변화한 후 거의 변화가 없었다.In order to determine the environmental hazards of aluminum from purified mineral sludge consisting of clay minerals, 30 ml of distilled water was added to 1 g of purified sludge and adjusted to pH 2, 4, 7, 10. Likewise, pH 4, 7, 10 changed to pH 7 almost after 24 hours, but pH 2 changed little to pH 4 after 24 hours.
이는 정수장슬러지가 결정구조를 갖고 있어서 광물격자내에 Al 표면의 (-)전하에 의한 H+ 이온의 흡착으로 완충능을 갖고 있슴을 알 수 있으며, 이에 의한 토양의 산도교정에 중요한 역할을 한다.This shows that the water purification sludge has a crystal structure and has a buffering capacity due to the adsorption of H + ions by the negative charge of the Al surface in the mineral lattice, thereby playing an important role in the acidity correction of the soil.
알루미늄의 완충작용은 다음과 같은 기작에 의해 이루어진다.The buffering effect of aluminum is achieved by the following mechanism.
＞AlO- + H+ → ＞AlOH＞ AlO- + H + → ＞ AlOH
＞AlOH + H+ → ＞AlOH2+＞ AlOH + H + → ＞ AlOH2 +
[그림 1][Figure 1]
정수장슬러지에 대한 pH에 따른 시간별 Al 용출량 분석결과는 표 1에 나타냈다.The results of the analysis of Al elution with time according to pH for water purification sludge are shown in Table 1.
정수장슬러지는 pH 2에서 알루미늄 용출실험결과 1,847ppm에서 2,040ppm까지 많은 량이 용출되었으나, pH 4, 7, 10에서는 거의 용출되지 않았다.Water purification sludge was eluted from 1,847ppm to 2,040ppm in aluminum at pH 2, but hardly eluted at pH 4, 7, 10.
pH 2에서 Al 용출량이 많은 것을 정수장슬러지의 시간별 pH 변화에서 pH 2에서는 24시간 이후에도 거의 pH 4 부근으로 변화한 후 거의 변화가 없는 것과 관련하여 정수장슬러지는 pH 2와 같은 강산성 조건에서는 Al 용출에 대한 환경적 문제가 야기되나, 정수슬러지를 유기물과 혼합한 상토는 pH 2에서도 Al 용출이 거의 없어 환경적인 위험 부담이 없는 것으로 판단되었다.The large amount of Al elution at pH 2 changed from the pH change of the water purification sludge to pH 4 almost 24 hours after 24 hours, and then almost no change. Although environmental problems are caused, the soil mixed with purified water sludge with organic matter has little Al dissolution even at pH 2, so it was judged that there is no environmental risk.
[실시예 5]Example 5
[식물생육실험][Plant Growth Experiment]
본 발명의 실시예 1,2의 상토 조성물의 효용성을 평가하기 위하여 공시작물인 벼를 이용하여 작물시험을 실시한 결과 탈수슬러지구를 제외한 실시예 1, 실시예 2 모두 지상부 신상, 뿌리의 발육, 생중 량이 시판용 상토보다 매우 양호했다. 이것은 정수장슬러지가 상토원료로 사용 가능하다는 증거이다(표 3).In order to evaluate the efficacy of the soil composition of Examples 1 and 2 of the present invention, the crop test was carried out using rice as a starting material. The amount was much better than commercial topsoil. This is evidence that water purification sludge can be used as a top raw material (Table 3).
상기 표 3에 나타낸 바와 같이 슬러지 단독 처리구(탈수슬러지구)를 제외한 실시예 1 처리구, 실시예 2 처리구에서 시판용 상토보다 뿌리발육, 신장율이 매우 양호하게 나타났으며, 또한 정수장슬러지 처리구의 수도묘는 적립상태였고, 도열병에도 내성이 있는 것으로 관찰 되었다.As shown in Table 3, the root growth and elongation rate of the treatment plant in Example 1 and Example 2 except for sludge treatment (dewatering sludge) were significantly better than those of commercial soils. It was accumulated and was found to be resistant to febrile disease.
특히 실시예 2에서 뿌리발육, 신장율이 가장 좋게 나타난 것은 부엽토의 첨가에 의한 통기성을 좋게한 결과로 받아들여져서 향후 제조시 부엽토를 20%의 범위내에서 혼합하는 것이 상토의 품질을 향상시키는데 기여할 것으로 판단된다.Particularly, the best root growth and elongation rate in Example 2 were accepted as the result of improved air permeability due to the addition of the subfoliated soil, so that the mixing of the subfoliated soil within the range of 20% will contribute to the improvement of the top soil quality. Judging.
상술한 바와 같은 본 발명은 상기 표 3에서 시판용 상토보다 월등한 뿌리발육을 보인 것을 정수장슬러지에 다량의 치환성염기와 유효규산을 함유하고 있어, K, Ca 함량증대와 식물의 규산흡수에 의한 내병성을 증대시켜 주었으며, 정수장슬러지내의 점토에 의한 보수력을 향상시켜 주었고, 정수장슬러지와 유기물(부엽토)과의 결합에 의한 입단화로 통기성을 좋게 하여 수도묘의 발육을 좋게하는 효과가 있다.As described above, the present invention shows a superior root development than commercially available clay in Table 3, which contains a large amount of substitution base and effective silicic acid in purified water sludge. In addition, the water retention capacity by clay in the water purification plant sludge was improved, and the granulation by the combination of the water purification plant sludge and the organic matter (leafy soil) was improved to improve the development of the seedlings.
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